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Diffstat (limited to 'sql/sys_vars.cc')
| -rw-r--r-- | sql/sys_vars.cc | 7030 |
1 files changed, 7030 insertions, 0 deletions
diff --git a/sql/sys_vars.cc b/sql/sys_vars.cc new file mode 100644 index 00000000..0df11e0b --- /dev/null +++ b/sql/sys_vars.cc @@ -0,0 +1,7030 @@ +/* Copyright (c) 2002, 2015, Oracle and/or its affiliates. + Copyright (c) 2012, 2022, MariaDB Corporation. + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; version 2 of the License. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1335 USA */ + +/** + @file + Definitions of all server's session or global variables. + + How to add new variables: + + 1. copy one of the existing variables, and edit the declaration. + 2. if you need special behavior on assignment or additional checks + use ON_CHECK and ON_UPDATE callbacks. + 3. *Don't* add new Sys_var classes or uncle Occam will come + with his razor to haunt you at nights + + Note - all storage engine variables (for example myisam_whatever) + should go into the corresponding storage engine sources + (for example in storage/myisam/ha_myisam.cc) ! +*/ + +#include "sql_plugin.h" +#include "sql_priv.h" +#include "sql_class.h" // set_var.h: THD +#include "sys_vars.inl" +#include "my_sys.h" + +#include "events.h" +#include <thr_alarm.h> +#include "slave.h" +#include "rpl_mi.h" +#include "transaction.h" +#include "mysqld.h" +#include "lock.h" +#include "sql_time.h" // known_date_time_formats +#include "sql_acl.h" // mysql_user_table_is_in_short_password_format +#include "derror.h" // read_texts +#include "sql_base.h" // close_cached_tables +#include "hostname.h" // host_cache_size +#include <myisam.h> +#include "debug_sync.h" // DEBUG_SYNC +#include "sql_show.h" +#include "opt_trace_context.h" + +#include "log_event.h" +#ifdef WITH_PERFSCHEMA_STORAGE_ENGINE +#include "../storage/perfschema/pfs_server.h" +#endif /* WITH_PERFSCHEMA_STORAGE_ENGINE */ +#include "threadpool.h" +#include "sql_repl.h" +#include "opt_range.h" +#include "rpl_parallel.h" +#include "semisync_master.h" +#include "semisync_slave.h" +#include <ssl_compat.h> +#ifdef WITH_WSREP +#include "wsrep_mysqld.h" +#endif + +#define PCRE2_STATIC 1 /* Important on Windows */ +#include "pcre2.h" /* pcre2 header file */ + +/* + The rule for this file: everything should be 'static'. When a sys_var + variable or a function from this file is - in very rare cases - needed + elsewhere it should be explicitly declared 'export' here to show that it's + not a mistakenly forgotten 'static' keyword. +*/ +#define export /* not static */ + +#ifdef WITH_PERFSCHEMA_STORAGE_ENGINE + +static Sys_var_mybool Sys_pfs_enabled( + "performance_schema", "Enable the performance schema.", + PARSED_EARLY READ_ONLY GLOBAL_VAR(pfs_param.m_enabled), + CMD_LINE(OPT_ARG), DEFAULT(FALSE)); + +static Sys_var_long Sys_pfs_events_waits_history_long_size( + "performance_schema_events_waits_history_long_size", + "Number of rows in EVENTS_WAITS_HISTORY_LONG." + " Use 0 to disable, -1 for automated sizing.", + PARSED_EARLY READ_ONLY GLOBAL_VAR(pfs_param.m_events_waits_history_long_sizing), + CMD_LINE(REQUIRED_ARG), VALID_RANGE(-1, 1024*1024), + DEFAULT(PFS_AUTOSCALE_VALUE), BLOCK_SIZE(1)); + +static Sys_var_long Sys_pfs_events_waits_history_size( + "performance_schema_events_waits_history_size", + "Number of rows per thread in EVENTS_WAITS_HISTORY." + " Use 0 to disable, -1 for automated sizing.", + PARSED_EARLY READ_ONLY GLOBAL_VAR(pfs_param.m_events_waits_history_sizing), + CMD_LINE(REQUIRED_ARG), VALID_RANGE(-1, 1024), + DEFAULT(PFS_AUTOSCALE_VALUE), BLOCK_SIZE(1)); + +static Sys_var_ulong Sys_pfs_max_cond_classes( + "performance_schema_max_cond_classes", + "Maximum number of condition instruments.", + PARSED_EARLY READ_ONLY GLOBAL_VAR(pfs_param.m_cond_class_sizing), + CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, 256), + DEFAULT(PFS_MAX_COND_CLASS), BLOCK_SIZE(1)); + +static Sys_var_long Sys_pfs_max_cond_instances( + "performance_schema_max_cond_instances", + "Maximum number of instrumented condition objects." + " Use 0 to disable, -1 for automated sizing.", + PARSED_EARLY READ_ONLY GLOBAL_VAR(pfs_param.m_cond_sizing), + CMD_LINE(REQUIRED_ARG), VALID_RANGE(-1, 1024*1024), + DEFAULT(PFS_AUTOSCALE_VALUE), BLOCK_SIZE(1)); + +static Sys_var_long Sys_pfs_max_program_instances( + "performance_schema_max_program_instances", + "Maximum number of instrumented programs." + " Use 0 to disable, -1 for automated scaling.", + PARSED_EARLY READ_ONLY GLOBAL_VAR(pfs_param.m_program_sizing), + CMD_LINE(REQUIRED_ARG), VALID_RANGE(-1, 1024*1024), + DEFAULT(PFS_AUTOSCALE_VALUE), BLOCK_SIZE(1)); + +static Sys_var_long Sys_pfs_max_prepared_stmt_instances( + "performance_schema_max_prepared_statements_instances", + "Maximum number of instrumented prepared statements." + " Use 0 to disable, -1 for automated scaling.", + PARSED_EARLY READ_ONLY GLOBAL_VAR(pfs_param.m_prepared_stmt_sizing), + CMD_LINE(REQUIRED_ARG), VALID_RANGE(-1, 1024*1024), + DEFAULT(PFS_AUTOSCALE_VALUE), BLOCK_SIZE(1)); + +static Sys_var_ulong Sys_pfs_max_file_classes( + "performance_schema_max_file_classes", + "Maximum number of file instruments.", + PARSED_EARLY READ_ONLY GLOBAL_VAR(pfs_param.m_file_class_sizing), + CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, 256), + DEFAULT(PFS_MAX_FILE_CLASS), BLOCK_SIZE(1)); + +static Sys_var_ulong Sys_pfs_max_file_handles( + "performance_schema_max_file_handles", + "Maximum number of opened instrumented files.", + PARSED_EARLY READ_ONLY GLOBAL_VAR(pfs_param.m_file_handle_sizing), + CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, 1024*1024), + DEFAULT(PFS_MAX_FILE_HANDLE), BLOCK_SIZE(1)); + +static Sys_var_long Sys_pfs_max_file_instances( + "performance_schema_max_file_instances", + "Maximum number of instrumented files." + " Use 0 to disable, -1 for automated sizing.", + PARSED_EARLY READ_ONLY GLOBAL_VAR(pfs_param.m_file_sizing), + CMD_LINE(REQUIRED_ARG), VALID_RANGE(-1, 1024*1024), + DEFAULT(PFS_AUTOSCALE_VALUE), BLOCK_SIZE(1)); + +static Sys_var_long Sys_pfs_max_sockets( + "performance_schema_max_socket_instances", + "Maximum number of opened instrumented sockets." + " Use 0 to disable, -1 for automated sizing.", + PARSED_EARLY READ_ONLY GLOBAL_VAR(pfs_param.m_socket_sizing), + CMD_LINE(REQUIRED_ARG), VALID_RANGE(-1, 1024*1024), + DEFAULT(PFS_AUTOSCALE_VALUE), BLOCK_SIZE(1)); + +static Sys_var_ulong Sys_pfs_max_socket_classes( + "performance_schema_max_socket_classes", + "Maximum number of socket instruments.", + PARSED_EARLY READ_ONLY GLOBAL_VAR(pfs_param.m_socket_class_sizing), + CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, 256), + DEFAULT(PFS_MAX_SOCKET_CLASS), BLOCK_SIZE(1)); + +static Sys_var_ulong Sys_pfs_max_mutex_classes( + "performance_schema_max_mutex_classes", + "Maximum number of mutex instruments.", + PARSED_EARLY READ_ONLY GLOBAL_VAR(pfs_param.m_mutex_class_sizing), + CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, 256), + DEFAULT(PFS_MAX_MUTEX_CLASS), BLOCK_SIZE(1)); + +static Sys_var_long Sys_pfs_max_mutex_instances( + "performance_schema_max_mutex_instances", + "Maximum number of instrumented MUTEX objects." + " Use 0 to disable, -1 for automated sizing.", + PARSED_EARLY READ_ONLY GLOBAL_VAR(pfs_param.m_mutex_sizing), + CMD_LINE(REQUIRED_ARG), VALID_RANGE(-1, 100*1024*1024), + DEFAULT(PFS_AUTOSCALE_VALUE), BLOCK_SIZE(1)); + +static Sys_var_ulong Sys_pfs_max_rwlock_classes( + "performance_schema_max_rwlock_classes", + "Maximum number of rwlock instruments.", + PARSED_EARLY READ_ONLY GLOBAL_VAR(pfs_param.m_rwlock_class_sizing), + CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, 256), + DEFAULT(PFS_MAX_RWLOCK_CLASS), BLOCK_SIZE(1)); + +static Sys_var_long Sys_pfs_max_rwlock_instances( + "performance_schema_max_rwlock_instances", + "Maximum number of instrumented RWLOCK objects." + " Use 0 to disable, -1 for automated sizing.", + PARSED_EARLY READ_ONLY GLOBAL_VAR(pfs_param.m_rwlock_sizing), + CMD_LINE(REQUIRED_ARG), VALID_RANGE(-1, 100*1024*1024), + DEFAULT(PFS_AUTOSCALE_VALUE), BLOCK_SIZE(1)); + +static Sys_var_long Sys_pfs_max_table_handles( + "performance_schema_max_table_handles", + "Maximum number of opened instrumented tables." + " Use 0 to disable, -1 for automated sizing.", + PARSED_EARLY READ_ONLY GLOBAL_VAR(pfs_param.m_table_sizing), + CMD_LINE(REQUIRED_ARG), VALID_RANGE(-1, 1024*1024), + DEFAULT(PFS_AUTOSCALE_VALUE), BLOCK_SIZE(1)); + +static Sys_var_long Sys_pfs_max_table_instances( + "performance_schema_max_table_instances", + "Maximum number of instrumented tables." + " Use 0 to disable, -1 for automated sizing.", + PARSED_EARLY READ_ONLY GLOBAL_VAR(pfs_param.m_table_share_sizing), + CMD_LINE(REQUIRED_ARG), VALID_RANGE(-1, 1024*1024), + DEFAULT(PFS_AUTOSCALE_VALUE), BLOCK_SIZE(1)); + +static Sys_var_long Sys_pfs_max_table_lock_stat( + "performance_schema_max_table_lock_stat", + "Maximum number of lock statistics for instrumented tables." + " Use 0 to disable, -1 for automated scaling.", + PARSED_EARLY READ_ONLY GLOBAL_VAR(pfs_param.m_table_lock_stat_sizing), + CMD_LINE(REQUIRED_ARG), VALID_RANGE(-1, 1024*1024), + DEFAULT(PFS_AUTOSCALE_VALUE), BLOCK_SIZE(1)); + +static Sys_var_long Sys_pfs_max_index_stat( + "performance_schema_max_index_stat", + "Maximum number of index statistics for instrumented tables." + " Use 0 to disable, -1 for automated scaling.", + PARSED_EARLY READ_ONLY GLOBAL_VAR(pfs_param.m_index_stat_sizing), + CMD_LINE(REQUIRED_ARG), VALID_RANGE(-1, 1024*1024), + DEFAULT(PFS_AUTOSCALE_VALUE), BLOCK_SIZE(1)); + +static Sys_var_ulong Sys_pfs_max_thread_classes( + "performance_schema_max_thread_classes", + "Maximum number of thread instruments.", + PARSED_EARLY READ_ONLY GLOBAL_VAR(pfs_param.m_thread_class_sizing), + CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, 256), + DEFAULT(PFS_MAX_THREAD_CLASS), BLOCK_SIZE(1)); + +static Sys_var_long Sys_pfs_max_thread_instances( + "performance_schema_max_thread_instances", + "Maximum number of instrumented threads." + " Use 0 to disable, -1 for automated sizing.", + PARSED_EARLY READ_ONLY GLOBAL_VAR(pfs_param.m_thread_sizing), + CMD_LINE(REQUIRED_ARG), VALID_RANGE(-1, 1024*1024), + DEFAULT(PFS_AUTOSCALE_VALUE), BLOCK_SIZE(1)); + +static Sys_var_long Sys_pfs_setup_actors_size( + "performance_schema_setup_actors_size", + "Maximum number of rows in SETUP_ACTORS.", + PARSED_EARLY READ_ONLY GLOBAL_VAR(pfs_param.m_setup_actor_sizing), + CMD_LINE(REQUIRED_ARG), VALID_RANGE(-1, 1024), + DEFAULT(PFS_AUTOSCALE_VALUE), BLOCK_SIZE(1)); + +static Sys_var_long Sys_pfs_setup_objects_size( + "performance_schema_setup_objects_size", + "Maximum number of rows in SETUP_OBJECTS.", + PARSED_EARLY READ_ONLY GLOBAL_VAR(pfs_param.m_setup_object_sizing), + CMD_LINE(REQUIRED_ARG), VALID_RANGE(-1, 1024*1024), + DEFAULT(PFS_AUTOSCALE_VALUE), BLOCK_SIZE(1)); + +static Sys_var_long Sys_pfs_accounts_size( + "performance_schema_accounts_size", + "Maximum number of instrumented user@host accounts." + " Use 0 to disable, -1 for automated sizing.", + PARSED_EARLY READ_ONLY GLOBAL_VAR(pfs_param.m_account_sizing), + CMD_LINE(REQUIRED_ARG), VALID_RANGE(-1, 1024*1024), + DEFAULT(PFS_AUTOSCALE_VALUE), BLOCK_SIZE(1)); + +static Sys_var_long Sys_pfs_hosts_size( + "performance_schema_hosts_size", + "Maximum number of instrumented hosts." + " Use 0 to disable, -1 for automated sizing.", + PARSED_EARLY READ_ONLY GLOBAL_VAR(pfs_param.m_host_sizing), + CMD_LINE(REQUIRED_ARG), VALID_RANGE(-1, 1024*1024), + DEFAULT(PFS_AUTOSCALE_VALUE), BLOCK_SIZE(1)); + +static Sys_var_long Sys_pfs_users_size( + "performance_schema_users_size", + "Maximum number of instrumented users." + " Use 0 to disable, -1 for automated sizing.", + PARSED_EARLY READ_ONLY GLOBAL_VAR(pfs_param.m_user_sizing), + CMD_LINE(REQUIRED_ARG), VALID_RANGE(-1, 1024*1024), + DEFAULT(PFS_AUTOSCALE_VALUE), BLOCK_SIZE(1)); + +static Sys_var_ulong Sys_pfs_max_stage_classes( + "performance_schema_max_stage_classes", + "Maximum number of stage instruments.", + PARSED_EARLY READ_ONLY GLOBAL_VAR(pfs_param.m_stage_class_sizing), + CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, 256), + DEFAULT(PFS_MAX_STAGE_CLASS), BLOCK_SIZE(1)); + +static Sys_var_long Sys_pfs_events_stages_history_long_size( + "performance_schema_events_stages_history_long_size", + "Number of rows in EVENTS_STAGES_HISTORY_LONG." + " Use 0 to disable, -1 for automated sizing.", + PARSED_EARLY READ_ONLY GLOBAL_VAR(pfs_param.m_events_stages_history_long_sizing), + CMD_LINE(REQUIRED_ARG), VALID_RANGE(-1, 1024*1024), + DEFAULT(PFS_AUTOSCALE_VALUE), BLOCK_SIZE(1)); + +static Sys_var_long Sys_pfs_events_stages_history_size( + "performance_schema_events_stages_history_size", + "Number of rows per thread in EVENTS_STAGES_HISTORY." + " Use 0 to disable, -1 for automated sizing.", + PARSED_EARLY READ_ONLY GLOBAL_VAR(pfs_param.m_events_stages_history_sizing), + CMD_LINE(REQUIRED_ARG), VALID_RANGE(-1, 1024), + DEFAULT(PFS_AUTOSCALE_VALUE), BLOCK_SIZE(1)); + +/** + Variable performance_schema_max_statement_classes. + The default number of statement classes is the sum of: + - SQLCOM_END for all regular "statement/sql/...", + - SP_PSI_STATEMENT_INFO_COUNT for "statement/sp/...". + - (COM_END - mariadb gap) for all regular "statement/com/...", + - 1 for "statement/com/new_packet", for unknown enum_server_command + - 1 for "statement/com/Error", for invalid enum_server_command + - 1 for "statement/sql/error", for invalid enum_sql_command + - 1 for "statement/rpl/relay_log", for replicated statements. + - 1 for "statement/scheduler/event", for scheduled events. +*/ +static Sys_var_ulong Sys_pfs_max_statement_classes( + "performance_schema_max_statement_classes", + "Maximum number of statement instruments.", + PARSED_EARLY READ_ONLY GLOBAL_VAR(pfs_param.m_statement_class_sizing), + CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, 256), + DEFAULT((ulong) SQLCOM_END + SP_PSI_STATEMENT_INFO_COUNT + + (ulong) (COM_END -(COM_MDB_GAP_END - COM_MDB_GAP_BEG + 1)) + 5), + BLOCK_SIZE(1)); + +static Sys_var_long Sys_pfs_events_statements_history_long_size( + "performance_schema_events_statements_history_long_size", + "Number of rows in EVENTS_STATEMENTS_HISTORY_LONG." + " Use 0 to disable, -1 for automated sizing.", + PARSED_EARLY READ_ONLY GLOBAL_VAR(pfs_param.m_events_statements_history_long_sizing), + CMD_LINE(REQUIRED_ARG), VALID_RANGE(-1, 1024*1024), + DEFAULT(PFS_AUTOSCALE_VALUE), BLOCK_SIZE(1)); + +static Sys_var_long Sys_pfs_events_statements_history_size( + "performance_schema_events_statements_history_size", + "Number of rows per thread in EVENTS_STATEMENTS_HISTORY." + " Use 0 to disable, -1 for automated sizing.", + PARSED_EARLY READ_ONLY GLOBAL_VAR(pfs_param.m_events_statements_history_sizing), + CMD_LINE(REQUIRED_ARG), VALID_RANGE(-1, 1024), + DEFAULT(PFS_AUTOSCALE_VALUE), BLOCK_SIZE(1)); + +static Sys_var_ulong Sys_pfs_statement_stack_size( + "performance_schema_max_statement_stack", + "Number of rows per thread in EVENTS_STATEMENTS_CURRENT.", + PARSED_EARLY READ_ONLY GLOBAL_VAR(pfs_param.m_statement_stack_sizing), + CMD_LINE(REQUIRED_ARG), VALID_RANGE(1, 256), + DEFAULT(PFS_STATEMENTS_STACK_SIZE), BLOCK_SIZE(1)); + +static Sys_var_ulong Sys_pfs_max_memory_classes( + "performance_schema_max_memory_classes", + "Maximum number of memory pool instruments.", + PARSED_EARLY READ_ONLY GLOBAL_VAR(pfs_param.m_memory_class_sizing), + CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, 1024), + DEFAULT(PFS_MAX_MEMORY_CLASS), BLOCK_SIZE(1)); + +static Sys_var_long Sys_pfs_digest_size( + "performance_schema_digests_size", + "Size of the statement digest." + " Use 0 to disable, -1 for automated sizing.", + PARSED_EARLY READ_ONLY GLOBAL_VAR(pfs_param.m_digest_sizing), + CMD_LINE(REQUIRED_ARG), VALID_RANGE(-1, 1024*1024), + DEFAULT(PFS_AUTOSCALE_VALUE), BLOCK_SIZE(1)); + +static Sys_var_long Sys_pfs_events_transactions_history_long_size( + "performance_schema_events_transactions_history_long_size", + "Number of rows in EVENTS_TRANSACTIONS_HISTORY_LONG." + " Use 0 to disable, -1 for automated sizing.", + PARSED_EARLY READ_ONLY GLOBAL_VAR(pfs_param.m_events_transactions_history_long_sizing), + CMD_LINE(REQUIRED_ARG), VALID_RANGE(-1, 1024*1024), + DEFAULT(PFS_AUTOSIZE_VALUE), BLOCK_SIZE(1)); + +static Sys_var_long Sys_pfs_events_transactions_history_size( + "performance_schema_events_transactions_history_size", + "Number of rows per thread in EVENTS_TRANSACTIONS_HISTORY." + " Use 0 to disable, -1 for automated sizing.", + PARSED_EARLY READ_ONLY GLOBAL_VAR(pfs_param.m_events_transactions_history_sizing), + CMD_LINE(REQUIRED_ARG), VALID_RANGE(-1, 1024), + DEFAULT(PFS_AUTOSIZE_VALUE), BLOCK_SIZE(1)); + +static Sys_var_long Sys_pfs_max_digest_length( + "performance_schema_max_digest_length", + "Maximum length considered for digest text, when stored in performance_schema tables.", + PARSED_EARLY READ_ONLY GLOBAL_VAR(pfs_param.m_max_digest_length), + CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, 1024 * 1024), + DEFAULT(1024), BLOCK_SIZE(1)); + +static Sys_var_long Sys_pfs_connect_attrs_size( + "performance_schema_session_connect_attrs_size", + "Size of session attribute string buffer per thread." + " Use 0 to disable, -1 for automated sizing.", + PARSED_EARLY READ_ONLY + GLOBAL_VAR(pfs_param.m_session_connect_attrs_sizing), + CMD_LINE(REQUIRED_ARG), VALID_RANGE(-1, 1024 * 1024), + DEFAULT(PFS_AUTOSCALE_VALUE), BLOCK_SIZE(1)); + +static Sys_var_long Sys_pfs_max_metadata_locks( + "performance_schema_max_metadata_locks", + "Maximum number of metadata locks." + " Use 0 to disable, -1 for automated scaling.", + PARSED_EARLY READ_ONLY GLOBAL_VAR(pfs_param.m_metadata_lock_sizing), + CMD_LINE(REQUIRED_ARG), VALID_RANGE(-1, 100*1024*1024), + DEFAULT(PFS_AUTOSCALE_VALUE), BLOCK_SIZE(1)); + +static Sys_var_long Sys_pfs_max_sql_text_length( + "performance_schema_max_sql_text_length", + "Maximum length of displayed sql text.", + PARSED_EARLY READ_ONLY GLOBAL_VAR(pfs_param.m_max_sql_text_length), + CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, 1024 * 1024), + DEFAULT(1024), BLOCK_SIZE(1)); + +#endif /* WITH_PERFSCHEMA_STORAGE_ENGINE */ + +#ifdef WITH_WSREP + +/* + We need to keep the original values set by the user, as they will + be lost if wsrep_auto_increment_control set to 'ON': +*/ +static bool update_auto_increment_increment (sys_var *self, THD *thd, enum_var_type type) +{ + if (type == OPT_GLOBAL) + global_system_variables.saved_auto_increment_increment= + global_system_variables.auto_increment_increment; + else + thd->variables.saved_auto_increment_increment= + thd->variables.auto_increment_increment; + return false; +} + +#endif /* WITH_WSREP */ + +static Sys_var_double Sys_analyze_sample_percentage( + "analyze_sample_percentage", + "Percentage of rows from the table ANALYZE TABLE will sample " + "to collect table statistics. Set to 0 to let MariaDB decide " + "what percentage of rows to sample.", + SESSION_VAR(sample_percentage), + CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, 100), + DEFAULT(100)); + +static Sys_var_ulong Sys_auto_increment_increment( + "auto_increment_increment", + "Auto-increment columns are incremented by this", + SESSION_VAR(auto_increment_increment), + CMD_LINE(OPT_ARG), + VALID_RANGE(1, 65535), DEFAULT(1), BLOCK_SIZE(1), +#ifdef WITH_WSREP + NO_MUTEX_GUARD, IN_BINLOG, ON_CHECK(0), + ON_UPDATE(update_auto_increment_increment)); +#else + NO_MUTEX_GUARD, IN_BINLOG); +#endif /* WITH_WSREP */ + +#ifdef WITH_WSREP + +/* + We need to keep the original values set by the user, as they will + be lost if wsrep_auto_increment_control set to 'ON': +*/ +static bool update_auto_increment_offset (sys_var *self, THD *thd, enum_var_type type) +{ + if (type == OPT_GLOBAL) + global_system_variables.saved_auto_increment_offset= + global_system_variables.auto_increment_offset; + else + thd->variables.saved_auto_increment_offset= + thd->variables.auto_increment_offset; + return false; +} + +#endif /* WITH_WSREP */ + +static Sys_var_ulong Sys_auto_increment_offset( + "auto_increment_offset", + "Offset added to Auto-increment columns. Used when " + "auto-increment-increment != 1", + SESSION_VAR(auto_increment_offset), + CMD_LINE(OPT_ARG), + VALID_RANGE(1, 65535), DEFAULT(1), BLOCK_SIZE(1), +#ifdef WITH_WSREP + NO_MUTEX_GUARD, IN_BINLOG, ON_CHECK(0), + ON_UPDATE(update_auto_increment_offset)); +#else + NO_MUTEX_GUARD, IN_BINLOG); +#endif /* WITH_WSREP */ + +static Sys_var_mybool Sys_automatic_sp_privileges( + "automatic_sp_privileges", + "Creating and dropping stored procedures alters ACLs", + GLOBAL_VAR(sp_automatic_privileges), + CMD_LINE(OPT_ARG), DEFAULT(TRUE)); + +static Sys_var_ulong Sys_back_log( + "back_log", "The number of outstanding connection requests " + "MariaDB can have. This comes into play when the main MariaDB thread " + "gets very many connection requests in a very short time", + AUTO_SET READ_ONLY GLOBAL_VAR(back_log), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(0, 65535), DEFAULT(150), BLOCK_SIZE(1)); + +static Sys_var_charptr_fscs Sys_basedir( + "basedir", "Path to installation directory. All paths are " + "usually resolved relative to this", + READ_ONLY GLOBAL_VAR(mysql_home_ptr), CMD_LINE(REQUIRED_ARG, 'b'), + DEFAULT(0)); + +static Sys_var_charptr_fscs Sys_my_bind_addr( + "bind_address", "IP address to bind to. Several addresses may be " + "specified, separated by a comma (,).", + READ_ONLY GLOBAL_VAR(my_bind_addr_str), CMD_LINE(REQUIRED_ARG), + DEFAULT(0)); + +static Sys_var_vers_asof Sys_vers_asof_timestamp( + "system_versioning_asof", "Default value for the FOR SYSTEM_TIME AS OF clause", + SESSION_VAR(vers_asof_timestamp.type), NO_CMD_LINE, + DEFAULT(SYSTEM_TIME_UNSPECIFIED)); + +static const char *vers_alter_history_keywords[]= {"ERROR", "KEEP", NullS}; +static Sys_var_enum Sys_vers_alter_history( + "system_versioning_alter_history", "Versioning ALTER TABLE mode. " + "ERROR: Fail ALTER with error; " /* TODO: fail only when history non-empty */ + "KEEP: Keep historical system rows and subject them to ALTER", + SESSION_VAR(vers_alter_history), CMD_LINE(REQUIRED_ARG), + vers_alter_history_keywords, DEFAULT(VERS_ALTER_HISTORY_ERROR)); + +static Sys_var_on_access_global<Sys_var_ulonglong, + PRIV_SET_SYSTEM_GLOBAL_VAR_BINLOG_CACHE_SIZE> +Sys_binlog_cache_size( + "binlog_cache_size", "The size of the transactional cache for " + "updates to transactional engines for the binary log. " + "If you often use transactions containing many statements, " + "you can increase this to get more performance", + GLOBAL_VAR(binlog_cache_size), + CMD_LINE(REQUIRED_ARG), + VALID_RANGE(IO_SIZE, SIZE_T_MAX), DEFAULT(32768), BLOCK_SIZE(IO_SIZE)); + +static Sys_var_on_access_global<Sys_var_ulonglong, + PRIV_SET_SYSTEM_GLOBAL_VAR_BINLOG_FILE_CACHE_SIZE> +Sys_binlog_file_cache_size( + "binlog_file_cache_size", + "The size of file cache for the binary log", + GLOBAL_VAR(binlog_file_cache_size), + CMD_LINE(REQUIRED_ARG), + VALID_RANGE(IO_SIZE*2, SIZE_T_MAX), DEFAULT(IO_SIZE*4), BLOCK_SIZE(IO_SIZE)); + +static Sys_var_on_access_global<Sys_var_ulonglong, + PRIV_SET_SYSTEM_GLOBAL_VAR_BINLOG_STMT_CACHE_SIZE> +Sys_binlog_stmt_cache_size( + "binlog_stmt_cache_size", "The size of the statement cache for " + "updates to non-transactional engines for the binary log. " + "If you often use statements updating a great number of rows, " + "you can increase this to get more performance.", + GLOBAL_VAR(binlog_stmt_cache_size), + CMD_LINE(REQUIRED_ARG), + VALID_RANGE(IO_SIZE, SIZE_T_MAX), DEFAULT(32768), BLOCK_SIZE(IO_SIZE)); + +/* + Some variables like @sql_log_bin and @binlog_format change how/if binlogging + is done. We must not change them inside a running transaction or statement, + otherwise the event group eventually written to the binlog may become + incomplete or otherwise garbled. + + This function does the appropriate check. + + It returns true if an error is caused by incorrect usage, false if ok. +*/ +static bool +error_if_in_trans_or_substatement(THD *thd, int in_substatement_error, + int in_transaction_error) +{ + if (unlikely(thd->in_sub_stmt)) + { + my_error(in_substatement_error, MYF(0)); + return true; + } + + if (unlikely(thd->in_active_multi_stmt_transaction())) + { + my_error(in_transaction_error, MYF(0)); + return true; + } + + return false; +} + +bool check_has_super(sys_var *self, THD *thd, set_var *var) +{ + DBUG_ASSERT(self->scope() != sys_var::GLOBAL);// don't abuse check_has_super() +#ifndef NO_EMBEDDED_ACCESS_CHECKS + if (!(thd->security_ctx->master_access & + PRIV_SET_RESTRICTED_SESSION_SYSTEM_VARIABLE)) + { + my_error(ER_SPECIFIC_ACCESS_DENIED_ERROR, MYF(0), "SUPER"); + return true; + } +#endif + return false; +} + +static Sys_var_bit Sys_core_file("core_file", "Write core on crashes", + READ_ONLY GLOBAL_VAR(test_flags), CMD_LINE(OPT_ARG), + TEST_CORE_ON_SIGNAL, DEFAULT(IF_WIN(TRUE,FALSE))); + +static bool binlog_format_check(sys_var *self, THD *thd, set_var *var) +{ + /* + MariaDB Galera does not support STATEMENT or MIXED binlog format currently. + */ + if ((WSREP(thd) || opt_support_flashback) && + var->save_result.ulonglong_value != BINLOG_FORMAT_ROW) + { + // Push a warning to the error log. + push_warning_printf(thd, Sql_condition::WARN_LEVEL_WARN, ER_UNKNOWN_ERROR, + "MariaDB Galera and flashback do not support binlog format: %s", + binlog_format_names[var->save_result.ulonglong_value]); + /* + We allow setting up binlog_format other then ROW for session scope when + wsrep/flasback is enabled.This is done because of 2 reasons + 1. User might want to run pt-table-checksum. + 2. SuperUser knows what is doing :-) + + For refrence:- MDEV-7322 + */ + if (var->type == OPT_GLOBAL) + { + if (WSREP(thd)) + WSREP_ERROR("MariaDB Galera does not support binlog format: %s", + binlog_format_names[var->save_result.ulonglong_value]); + else + my_error(ER_FLASHBACK_NOT_SUPPORTED,MYF(0),"binlog_format", + binlog_format_names[var->save_result.ulonglong_value]); + return true; + } + } + + if (var->type == OPT_GLOBAL) + return false; + + /* + If RBR and open temporary tables, their CREATE TABLE may not be in the + binlog, so we can't toggle to SBR in this connection. + + If binlog_format=MIXED, there are open temporary tables, and an unsafe + statement is executed, then subsequent statements are logged in row + format and hence changes to temporary tables may be lost. So we forbid + switching @@SESSION.binlog_format from MIXED to STATEMENT when there are + open temp tables and we are logging in row format. + */ + if (thd->has_thd_temporary_tables() && + var->type == OPT_SESSION && + var->save_result.ulonglong_value == BINLOG_FORMAT_STMT && + ((thd->variables.binlog_format == BINLOG_FORMAT_MIXED && + thd->is_current_stmt_binlog_format_row()) || + thd->variables.binlog_format == BINLOG_FORMAT_ROW)) + { + my_error(ER_TEMP_TABLE_PREVENTS_SWITCH_OUT_OF_RBR, MYF(0)); + return true; + } + + if (unlikely(error_if_in_trans_or_substatement(thd, + ER_STORED_FUNCTION_PREVENTS_SWITCH_BINLOG_FORMAT, + ER_INSIDE_TRANSACTION_PREVENTS_SWITCH_BINLOG_FORMAT))) + return true; + + return false; +} + +static bool fix_binlog_format_after_update(sys_var *self, THD *thd, + enum_var_type type) +{ + if (type == OPT_SESSION) + thd->reset_current_stmt_binlog_format_row(); + return false; +} + +static Sys_var_on_access<Sys_var_enum, + PRIV_SET_SYSTEM_VAR_BINLOG_FORMAT, + PRIV_SET_SYSTEM_VAR_BINLOG_FORMAT> +Sys_binlog_format( + "binlog_format", "What form of binary logging the master will " + "use: either ROW for row-based binary logging, STATEMENT " + "for statement-based binary logging, or MIXED. MIXED is statement-" + "based binary logging except for those statements where only row-" + "based is correct: those which involve user-defined functions (i.e. " + "UDFs) or the UUID() function; for those, row-based binary logging is " + "automatically used.", + SESSION_VAR(binlog_format), CMD_LINE(REQUIRED_ARG, OPT_BINLOG_FORMAT), + binlog_format_names, DEFAULT(BINLOG_FORMAT_MIXED), + NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(binlog_format_check), + ON_UPDATE(fix_binlog_format_after_update)); + +static bool binlog_direct_check(sys_var *self, THD *thd, set_var *var) +{ + if (var->type == OPT_GLOBAL) + return false; + + if (unlikely(error_if_in_trans_or_substatement(thd, + ER_STORED_FUNCTION_PREVENTS_SWITCH_BINLOG_DIRECT, + ER_INSIDE_TRANSACTION_PREVENTS_SWITCH_BINLOG_DIRECT))) + return true; + + return false; +} + +static Sys_var_on_access<Sys_var_mybool, + PRIV_SET_SYSTEM_VAR_BINLOG_DIRECT_NON_TRANSACTIONAL_UPDATES, + PRIV_SET_SYSTEM_VAR_BINLOG_DIRECT_NON_TRANSACTIONAL_UPDATES> +Sys_binlog_direct( + "binlog_direct_non_transactional_updates", + "Causes updates to non-transactional engines using statement format to " + "be written directly to binary log. Before using this option make sure " + "that there are no dependencies between transactional and " + "non-transactional tables such as in the statement INSERT INTO t_myisam " + "SELECT * FROM t_innodb; otherwise, slaves may diverge from the master.", + SESSION_VAR(binlog_direct_non_trans_update), + CMD_LINE(OPT_ARG), DEFAULT(FALSE), + NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(binlog_direct_check)); + +static Sys_var_bit Sys_explicit_defaults_for_timestamp( + "explicit_defaults_for_timestamp", + "This option causes CREATE TABLE to create all TIMESTAMP columns " + "as NULL with DEFAULT NULL attribute, Without this option, " + "TIMESTAMP columns are NOT NULL and have implicit DEFAULT clauses.", + SESSION_VAR(option_bits), CMD_LINE(OPT_ARG), + OPTION_EXPLICIT_DEF_TIMESTAMP, DEFAULT(TRUE), NO_MUTEX_GUARD, IN_BINLOG); + +static Sys_var_ulonglong Sys_bulk_insert_buff_size( + "bulk_insert_buffer_size", "Size of tree cache used in bulk " + "insert optimisation. Note that this is a limit per thread!", + SESSION_VAR(bulk_insert_buff_size), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(0, SIZE_T_MAX), DEFAULT(8192*1024), BLOCK_SIZE(1)); + +static Sys_var_charptr_fscs Sys_character_sets_dir( + "character_sets_dir", "Directory where character sets are", + READ_ONLY GLOBAL_VAR(charsets_dir), CMD_LINE(REQUIRED_ARG), + DEFAULT(0)); + +static bool check_engine_supports_temporary(sys_var *self, THD *thd, set_var *var) +{ + plugin_ref plugin= var->save_result.plugin; + if (!plugin) + return false; + DBUG_ASSERT(plugin); + handlerton *hton= plugin_hton(plugin); + DBUG_ASSERT(hton); + if (ha_check_storage_engine_flag(hton, HTON_TEMPORARY_NOT_SUPPORTED)) + { + my_error(ER_ILLEGAL_HA_CREATE_OPTION, MYF(0), hton_name(hton)->str, + "TEMPORARY"); + return true; + } + return false; +} + +static bool check_not_null(sys_var *self, THD *thd, set_var *var) +{ + return var->value && var->value->is_null(); +} +static bool check_charset(sys_var *self, THD *thd, set_var *var) +{ + if (!var->value) + return false; + + char buff[STRING_BUFFER_USUAL_SIZE]; + if (var->value->result_type() == STRING_RESULT) + { + String str(buff, sizeof(buff), system_charset_info), *res; + if (!(res= var->value->val_str(&str))) + var->save_result.ptr= NULL; + else + { + ErrConvString err(res); /* Get utf8 '\0' terminated string */ + myf utf8_flag= thd->get_utf8_flag(); + if (!(var->save_result.ptr= get_charset_by_csname(err.ptr(), + MY_CS_PRIMARY, + MYF(utf8_flag))) && + !(var->save_result.ptr= get_old_charset_by_name(err.ptr()))) + { + my_error(ER_UNKNOWN_CHARACTER_SET, MYF(0), err.ptr()); + return true; + } + } + } + else // INT_RESULT + { + int csno= (int)var->value->val_int(); + CHARSET_INFO *cs; + if ((var->save_result.ptr= cs= get_charset(csno, MYF(0)))) + { + /* + Backward compatibility: pre MDEV-30824 servers + can write non-default collation IDs to binary log: + SET character_set_client=83; -- utf8mb3_bin + Convert a non-default collation to the compiled default collation, + e.g. utf8mb3_bin to utf8mb3_general_ci, but only if + - THD is a slave thread or + - is processing a mysqlbinlog output. + */ + if ((cs->state & MY_CS_PRIMARY) || + ((thd->variables.pseudo_slave_mode || thd->slave_thread) && + (var->save_result.ptr= + Lex_exact_charset_opt_extended_collate(cs, true). + find_default_collation()))) + return false; + } + my_error(ER_UNKNOWN_CHARACTER_SET, MYF(0), llstr(csno, buff)); + return true; + } + return false; +} +static bool check_charset_not_null(sys_var *self, THD *thd, set_var *var) +{ + return check_charset(self, thd, var) || check_not_null(self, thd, var); +} +static Sys_var_struct Sys_character_set_system( + "character_set_system", "The character set used by the server " + "for storing identifiers", + READ_ONLY GLOBAL_VAR(system_charset_info), NO_CMD_LINE, + offsetof(CHARSET_INFO, cs_name.str), DEFAULT(0)); + +static Sys_var_struct Sys_character_set_server( + "character_set_server", "The default character set", + SESSION_VAR(collation_server), NO_CMD_LINE, + offsetof(CHARSET_INFO, cs_name.str), DEFAULT(&default_charset_info), + NO_MUTEX_GUARD, IN_BINLOG, ON_CHECK(check_charset_not_null)); + +static bool check_charset_db(sys_var *self, THD *thd, set_var *var) +{ + if (check_charset_not_null(self, thd, var)) + return true; + if (!var->value) // = DEFAULT + var->save_result.ptr= thd->db_charset; + return false; +} +static Sys_var_struct Sys_character_set_database( + "character_set_database", + "The character set used by the default database", + SESSION_VAR(collation_database), NO_CMD_LINE, + offsetof(CHARSET_INFO, cs_name.str), DEFAULT(&default_charset_info), + NO_MUTEX_GUARD, IN_BINLOG, ON_CHECK(check_charset_db)); + +static bool check_cs_client(sys_var *self, THD *thd, set_var *var) +{ + if (check_charset_not_null(self, thd, var)) + return true; + + // Currently, UCS-2 cannot be used as a client character set + if (!is_supported_parser_charset((CHARSET_INFO *)(var->save_result.ptr))) + return true; + + return false; +} +static bool fix_thd_charset(sys_var *self, THD *thd, enum_var_type type) +{ + if (type == OPT_SESSION) + thd->update_charset(); + return false; +} +static Sys_var_struct Sys_character_set_client( + "character_set_client", "The character set for statements " + "that arrive from the client", + NO_SET_STMT SESSION_VAR(character_set_client), NO_CMD_LINE, + offsetof(CHARSET_INFO, cs_name.str), DEFAULT(&default_charset_info), + NO_MUTEX_GUARD, IN_BINLOG, ON_CHECK(check_cs_client), + ON_UPDATE(fix_thd_charset)); +// for check changing +export sys_var *Sys_character_set_client_ptr= &Sys_character_set_client; + +static Sys_var_struct Sys_character_set_connection( + "character_set_connection", "The character set used for " + "literals that do not have a character set introducer and for " + "number-to-string conversion", + NO_SET_STMT SESSION_VAR(collation_connection), NO_CMD_LINE, + offsetof(CHARSET_INFO, cs_name.str), DEFAULT(&default_charset_info), + NO_MUTEX_GUARD, IN_BINLOG, ON_CHECK(check_charset_not_null), + ON_UPDATE(fix_thd_charset)); +// for check changing +export sys_var *Sys_character_set_connection_ptr= &Sys_character_set_connection; + +static Sys_var_struct Sys_character_set_results( + "character_set_results", "The character set used for returning " + "query results to the client", + SESSION_VAR(character_set_results), NO_CMD_LINE, + offsetof(CHARSET_INFO, cs_name.str), DEFAULT(&default_charset_info), + NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_charset)); +// for check changing +export sys_var *Sys_character_set_results_ptr= &Sys_character_set_results; + +static Sys_var_struct Sys_character_set_filesystem( + "character_set_filesystem", "The filesystem character set", + NO_SET_STMT SESSION_VAR(character_set_filesystem), NO_CMD_LINE, + offsetof(CHARSET_INFO, cs_name.str), DEFAULT(&character_set_filesystem), + NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_charset_not_null), + ON_UPDATE(fix_thd_charset)); + +static const char *completion_type_names[]= {"NO_CHAIN", "CHAIN", "RELEASE", 0}; +static Sys_var_enum Sys_completion_type( + "completion_type", "The transaction completion type", + SESSION_VAR(completion_type), CMD_LINE(REQUIRED_ARG), + completion_type_names, DEFAULT(0)); + +static bool check_collation_not_null(sys_var *self, THD *thd, set_var *var) +{ + if (!var->value) + return false; + myf utf8_flag= thd->get_utf8_flag(); + char buff[STRING_BUFFER_USUAL_SIZE]; + if (var->value->result_type() == STRING_RESULT) + { + String str(buff, sizeof(buff), system_charset_info), *res; + if (!(res= var->value->val_str(&str))) + var->save_result.ptr= NULL; + else + { + ErrConvString err(res); /* Get utf8 '\0'-terminated string */ + if (!(var->save_result.ptr= get_charset_by_name(err.ptr(), MYF(utf8_flag)))) + { + my_error(ER_UNKNOWN_COLLATION, MYF(0), err.ptr()); + return true; + } + } + } + else // INT_RESULT + { + int csno= (int)var->value->val_int(); + if (!(var->save_result.ptr= get_charset(csno, MYF(0)))) + { + my_error(ER_UNKNOWN_COLLATION, MYF(0), llstr(csno, buff)); + return true; + } + } + return check_not_null(self, thd, var); +} +static Sys_var_struct Sys_collation_connection( + "collation_connection", "The collation of the connection " + "character set", + NO_SET_STMT SESSION_VAR(collation_connection), NO_CMD_LINE, + offsetof(CHARSET_INFO, coll_name.str), DEFAULT(&default_charset_info), + NO_MUTEX_GUARD, IN_BINLOG, ON_CHECK(check_collation_not_null), + ON_UPDATE(fix_thd_charset)); + +static bool check_collation_db(sys_var *self, THD *thd, set_var *var) +{ + if (check_collation_not_null(self, thd, var)) + return true; + if (!var->value) // = DEFAULT + var->save_result.ptr= thd->db_charset; + return false; +} +static Sys_var_struct Sys_collation_database( + "collation_database", "The collation of the database " + "character set", + SESSION_VAR(collation_database), NO_CMD_LINE, + offsetof(CHARSET_INFO, coll_name.str), DEFAULT(&default_charset_info), + NO_MUTEX_GUARD, IN_BINLOG, ON_CHECK(check_collation_db)); + +static Sys_var_struct Sys_collation_server( + "collation_server", "The server default collation", + SESSION_VAR(collation_server), NO_CMD_LINE, + offsetof(CHARSET_INFO, coll_name.str), DEFAULT(&default_charset_info), + NO_MUTEX_GUARD, IN_BINLOG, ON_CHECK(check_collation_not_null)); + +static Sys_var_uint Sys_column_compression_threshold( + "column_compression_threshold", + "Minimum column data length eligible for compression", + SESSION_VAR(column_compression_threshold), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(0, UINT_MAX), DEFAULT(100), BLOCK_SIZE(1)); + +static Sys_var_uint Sys_column_compression_zlib_level( + "column_compression_zlib_level", + "zlib compression level (1 gives best speed, 9 gives best compression)", + SESSION_VAR(column_compression_zlib_level), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(0, 9), DEFAULT(6), BLOCK_SIZE(1)); + +/* + Note that names must correspond to zlib strategy definition. So that we can + pass column_compression_zlib_strategy directly to deflateInit2(). +*/ +static const char *column_compression_zlib_strategy_names[]= +{ "DEFAULT_STRATEGY", "FILTERED", "HUFFMAN_ONLY", "RLE", "FIXED", 0 }; + +static Sys_var_enum Sys_column_compression_zlib_strategy( + "column_compression_zlib_strategy", + "The strategy parameter is used to tune the compression algorithm. Use " + "the value DEFAULT_STRATEGY for normal data, FILTERED for data produced " + "by a filter (or predictor), HUFFMAN_ONLY to force Huffman encoding " + "only (no string match), or RLE to limit match distances to one " + "(run-length encoding). Filtered data consists mostly of small values " + "with a somewhat random distribution. In this case, the compression " + "algorithm is tuned to compress them better. The effect of FILTERED is " + "to force more Huffman coding and less string matching; it is somewhat " + "intermediate between DEFAULT_STRATEGY and HUFFMAN_ONLY. RLE is " + "designed to be almost as fast as HUFFMAN_ONLY, but give better " + "compression for PNG image data. The strategy parameter only affects " + "the compression ratio but not the correctness of the compressed output " + "even if it is not set appropriately. FIXED prevents the use of dynamic " + "Huffman codes, allowing for a simpler decoder for special " + "applications.", + SESSION_VAR(column_compression_zlib_strategy), CMD_LINE(REQUIRED_ARG), + column_compression_zlib_strategy_names, DEFAULT(0)); + +static Sys_var_mybool Sys_column_compression_zlib_wrap( + "column_compression_zlib_wrap", + "Generate zlib header and trailer and compute adler32 check value. " + "It can be used with storage engines that don't provide data integrity " + "verification to detect data corruption.", + SESSION_VAR(column_compression_zlib_wrap), CMD_LINE(OPT_ARG), + DEFAULT(FALSE)); + +static const char *concurrent_insert_names[]= {"NEVER", "AUTO", "ALWAYS", 0}; +static Sys_var_enum Sys_concurrent_insert( + "concurrent_insert", "Use concurrent insert with MyISAM", + GLOBAL_VAR(myisam_concurrent_insert), CMD_LINE(OPT_ARG), + concurrent_insert_names, DEFAULT(1)); + +static Sys_var_on_access_global<Sys_var_ulong, + PRIV_SET_SYSTEM_GLOBAL_VAR_CONNECT_TIMEOUT> +Sys_connect_timeout( + "connect_timeout", + "The number of seconds the mysqld server is waiting for a connect " + "packet before responding with 'Bad handshake'", + GLOBAL_VAR(connect_timeout), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(2, LONG_TIMEOUT), DEFAULT(CONNECT_TIMEOUT), BLOCK_SIZE(1)); + +static Sys_var_charptr_fscs Sys_datadir( + "datadir", "Path to the database root directory", + READ_ONLY GLOBAL_VAR(mysql_real_data_home_ptr), + CMD_LINE(REQUIRED_ARG, 'h'), DEFAULT(mysql_real_data_home)); + +#ifndef DBUG_OFF +static Sys_var_dbug Sys_dbug( + "debug", "Built-in DBUG debugger", sys_var::SESSION, + CMD_LINE(OPT_ARG, '#'), DEFAULT(""), NO_MUTEX_GUARD, NOT_IN_BINLOG, + ON_CHECK(check_has_super), ON_UPDATE(0), + DEPRECATED("'@@debug_dbug'")); // since 5.5.37 + +static Sys_var_dbug Sys_debug_dbug( + "debug_dbug", "Built-in DBUG debugger", sys_var::SESSION, + CMD_LINE(OPT_ARG, '#'), DEFAULT(""), NO_MUTEX_GUARD, NOT_IN_BINLOG, + ON_CHECK(check_has_super)); +#endif + +/** + @todo + When updating myisam_delay_key_write, we should do a 'flush tables' + of all MyISAM tables to ensure that they are reopen with the + new attribute. +*/ +export bool fix_delay_key_write(sys_var *self, THD *thd, enum_var_type type) +{ + switch (delay_key_write_options) { + case DELAY_KEY_WRITE_NONE: + myisam_delay_key_write=0; + ha_open_options&= ~HA_OPEN_DELAY_KEY_WRITE; + break; + case DELAY_KEY_WRITE_ON: + myisam_delay_key_write=1; + ha_open_options&= ~HA_OPEN_DELAY_KEY_WRITE; + break; + case DELAY_KEY_WRITE_ALL: + myisam_delay_key_write=1; + ha_open_options|= HA_OPEN_DELAY_KEY_WRITE; + break; + } +#ifdef WITH_ARIA_STORAGE_ENGINE + maria_delay_key_write= myisam_delay_key_write; +#endif + return false; +} +static const char *delay_key_write_names[]= { "OFF", "ON", "ALL", NullS }; +static Sys_var_enum Sys_delay_key_write( + "delay_key_write", "Specifies how MyISAM tables handles CREATE " + "TABLE DELAY_KEY_WRITE. If set to ON, the default, any DELAY KEY " + "WRITEs are honored. The key buffer is then flushed only when the " + "table closes, speeding up writes. MyISAM tables should be " + "automatically checked upon startup in this case, and " + "--external locking should not be used, as it can lead to index " + "corruption. If set to OFF, DELAY KEY WRITEs are ignored, while if " + "set to ALL, all new opened tables are treated as if created with " + "DELAY KEY WRITEs enabled.", + GLOBAL_VAR(delay_key_write_options), CMD_LINE(OPT_ARG), + delay_key_write_names, DEFAULT(DELAY_KEY_WRITE_ON), + NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(0), + ON_UPDATE(fix_delay_key_write)); + +static Sys_var_ulong Sys_delayed_insert_limit( + "delayed_insert_limit", + "After inserting delayed_insert_limit rows, the INSERT DELAYED " + "handler will check if there are any SELECT statements pending. " + "If so, it allows these to execute before continuing.", + GLOBAL_VAR(delayed_insert_limit), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(1, UINT_MAX), DEFAULT(DELAYED_LIMIT), BLOCK_SIZE(1)); + +static Sys_var_ulong Sys_delayed_insert_timeout( + "delayed_insert_timeout", + "How long a INSERT DELAYED thread should wait for INSERT statements " + "before terminating", + GLOBAL_VAR(delayed_insert_timeout), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(1, LONG_TIMEOUT), DEFAULT(DELAYED_WAIT_TIMEOUT), + BLOCK_SIZE(1)); + +static Sys_var_ulong Sys_delayed_queue_size( + "delayed_queue_size", + "What size queue (in rows) should be allocated for handling INSERT " + "DELAYED. If the queue becomes full, any client that does INSERT " + "DELAYED will wait until there is room in the queue again", + GLOBAL_VAR(delayed_queue_size), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(1, UINT_MAX), DEFAULT(DELAYED_QUEUE_SIZE), BLOCK_SIZE(1)); + +#ifdef HAVE_EVENT_SCHEDULER +static const char *event_scheduler_names[]= { "OFF", "ON", "DISABLED", + "ORIGINAL", NullS }; +static bool event_scheduler_check(sys_var *self, THD *thd, set_var *var) +{ + if (Events::opt_event_scheduler == Events::EVENTS_DISABLED) + { + my_error(ER_OPTION_PREVENTS_STATEMENT, MYF(0), + "--event-scheduler=DISABLED or --skip-grant-tables"); + return true; + } + /* DISABLED is only accepted on the command line */ + if (var->save_result.ulonglong_value == Events::EVENTS_DISABLED) + return true; + return false; +} + +static bool event_scheduler_update(sys_var *self, THD *thd, enum_var_type type) +{ + int err_no= 0; + bool ret; + uint opt_event_scheduler_value= Events::opt_event_scheduler; + mysql_mutex_unlock(&LOCK_global_system_variables); + /* + Events::start() is heavyweight. In particular it creates a new THD, + which takes LOCK_global_system_variables internally. + Thus we have to release it here. + We need to re-take it before returning, though. + + Note that since we release LOCK_global_system_variables before calling + start/stop, there is a possibility that the server variable + can become out of sync with the real event scheduler state. + + This can happen with two concurrent statments if the first gets + interrupted after start/stop but before retaking + LOCK_global_system_variables. However, this problem should be quite + rare and it's difficult to avoid it without opening up possibilities + for deadlocks. See bug#51160. + */ + + /* EVENTS_ORIGINAL means we should revert back to the startup state */ + if (opt_event_scheduler_value == Events::EVENTS_ORIGINAL) + { + opt_event_scheduler_value= Events::opt_event_scheduler= + Events::startup_state; + } + + /* + If the scheduler was not properly inited (because of wrong system tables), + try to init it again. This is needed for mysql_upgrade to work properly if + the event tables where upgraded. + */ + if (!Events::inited && (Events::init(thd, 0) || !Events::inited)) + ret= 1; + else + ret= opt_event_scheduler_value == Events::EVENTS_ON ? + Events::start(&err_no) : + Events::stop(); + mysql_mutex_lock(&LOCK_global_system_variables); + if (ret) + { + Events::opt_event_scheduler= Events::EVENTS_OFF; + my_error(ER_EVENT_SET_VAR_ERROR, MYF(0), err_no); + } + return ret; +} + +static Sys_var_enum Sys_event_scheduler( + "event_scheduler", "Enable the event scheduler. Possible values are " + "ON, OFF, and DISABLED (keep the event scheduler completely " + "deactivated, it cannot be activated run-time)", + GLOBAL_VAR(Events::opt_event_scheduler), CMD_LINE(OPT_ARG), + event_scheduler_names, DEFAULT(Events::EVENTS_OFF), + NO_MUTEX_GUARD, NOT_IN_BINLOG, + ON_CHECK(event_scheduler_check), ON_UPDATE(event_scheduler_update)); +#endif + +static bool copy_to_expire_logs_days(sys_var *, THD *, + enum_var_type type) +{ + expire_logs_days= binlog_expire_logs_seconds / (double)(24 * 60 * 60); + return false; +} + +static bool copy_to_binlog_expire_logs_seconds(sys_var *, THD *, + enum_var_type type) +{ + binlog_expire_logs_seconds= (ulong)(expire_logs_days * 24 * 60 * 60); + return false; +} + +static Sys_var_on_access_global<Sys_var_double, + PRIV_SET_SYSTEM_GLOBAL_VAR_EXPIRE_LOGS_DAYS> +Sys_expire_logs_days( + "expire_logs_days", + "If non-zero, binary logs will be purged after expire_logs_days " + "days; It and binlog_expire_logs_seconds are linked, such that " + "changes in one are converted into the other, presentable as a " + "decimal value with 1/1000000 of the day precision; possible " + "purges happen at startup and at binary log rotation", + GLOBAL_VAR(expire_logs_days), + CMD_LINE(REQUIRED_ARG, OPT_EXPIRE_LOGS_DAYS), VALID_RANGE(0, 99), + DEFAULT(0), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(0), + ON_UPDATE(copy_to_binlog_expire_logs_seconds)); + +static Sys_var_on_access_global<Sys_var_ulong, + PRIV_SET_SYSTEM_GLOBAL_VAR_EXPIRE_LOGS_DAYS> +Sys_binlog_expire_logs_seconds( + "binlog_expire_logs_seconds", + "If non-zero, binary logs will be purged after " + "binlog_expire_logs_seconds seconds; It and expire_logs_days are " + "linked, such that changes in one are converted into the other. " + "Possible purges happen at startup and at binary log rotation.", + GLOBAL_VAR(binlog_expire_logs_seconds), + CMD_LINE(REQUIRED_ARG, OPT_BINLOG_EXPIRE_LOGS_SECONDS), + VALID_RANGE(0, 8553600), DEFAULT(0), BLOCK_SIZE(1), NO_MUTEX_GUARD, + NOT_IN_BINLOG, ON_CHECK(0), ON_UPDATE(copy_to_expire_logs_days)); + +static Sys_var_mybool Sys_flush( + "flush", "Flush MyISAM tables to disk between SQL commands", + GLOBAL_VAR(myisam_flush), + CMD_LINE(OPT_ARG), DEFAULT(FALSE)); + +static Sys_var_ulong Sys_flush_time( + "flush_time", + "A dedicated thread is created to flush all tables at the " + "given interval", + GLOBAL_VAR(flush_time), + CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, LONG_TIMEOUT), + DEFAULT(0), BLOCK_SIZE(1)); + +static bool check_ftb_syntax(sys_var *self, THD *thd, set_var *var) +{ + return ft_boolean_check_syntax_string((uchar*) + (var->save_result.string_value.str), + var->save_result.string_value.length, + self->charset(thd)); +} +static bool query_cache_flush(sys_var *self, THD *thd, enum_var_type type) +{ +#ifdef HAVE_QUERY_CACHE + query_cache.flush(); +#endif /* HAVE_QUERY_CACHE */ + return false; +} +/// @todo make SESSION_VAR (usability enhancement and a fix for a race condition) +static Sys_var_charptr Sys_ft_boolean_syntax( + "ft_boolean_syntax", "List of operators for " + "MATCH ... AGAINST ( ... IN BOOLEAN MODE)", + GLOBAL_VAR(ft_boolean_syntax), + CMD_LINE(REQUIRED_ARG), + DEFAULT(DEFAULT_FTB_SYNTAX), NO_MUTEX_GUARD, + NOT_IN_BINLOG, ON_CHECK(check_ftb_syntax), ON_UPDATE(query_cache_flush)); + +static Sys_var_ulong Sys_ft_max_word_len( + "ft_max_word_len", + "The maximum length of the word to be included in a FULLTEXT index. " + "Note: FULLTEXT indexes must be rebuilt after changing this variable", + READ_ONLY GLOBAL_VAR(ft_max_word_len), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(10, HA_FT_MAXCHARLEN), DEFAULT(HA_FT_MAXCHARLEN), + BLOCK_SIZE(1)); + +static Sys_var_ulong Sys_ft_min_word_len( + "ft_min_word_len", + "The minimum length of the word to be included in a FULLTEXT index. " + "Note: FULLTEXT indexes must be rebuilt after changing this variable", + READ_ONLY GLOBAL_VAR(ft_min_word_len), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(1, HA_FT_MAXCHARLEN), DEFAULT(4), BLOCK_SIZE(1)); + +/// @todo make it an updatable SESSION_VAR +static Sys_var_ulong Sys_ft_query_expansion_limit( + "ft_query_expansion_limit", + "Number of best matches to use for query expansion", + READ_ONLY GLOBAL_VAR(ft_query_expansion_limit), + CMD_LINE(REQUIRED_ARG), + VALID_RANGE(0, 1000), DEFAULT(20), BLOCK_SIZE(1)); + +static Sys_var_charptr_fscs Sys_ft_stopword_file( + "ft_stopword_file", + "Use stopwords from this file instead of built-in list", + READ_ONLY GLOBAL_VAR(ft_stopword_file), CMD_LINE(REQUIRED_ARG), + DEFAULT(0)); + +static Sys_var_mybool Sys_ignore_builtin_innodb( + "ignore_builtin_innodb", + "Disable initialization of builtin InnoDB plugin", + READ_ONLY GLOBAL_VAR(opt_ignore_builtin_innodb), + CMD_LINE(OPT_ARG), DEFAULT(FALSE)); + +static bool check_init_string(sys_var *self, THD *thd, set_var *var) +{ + if (var->save_result.string_value.str == 0) + { + var->save_result.string_value.str= const_cast<char*>(""); + var->save_result.string_value.length= 0; + } + return false; +} +static PolyLock_rwlock PLock_sys_init_connect(&LOCK_sys_init_connect); + +static Sys_var_on_access_global<Sys_var_lexstring, + PRIV_SET_SYSTEM_GLOBAL_VAR_INIT_CONNECT> +Sys_init_connect( + "init_connect", "Command(s) that are executed for each " + "new connection (unless the user has SUPER privilege)", + GLOBAL_VAR(opt_init_connect), CMD_LINE(REQUIRED_ARG), + DEFAULT(""), &PLock_sys_init_connect, NOT_IN_BINLOG, + ON_CHECK(check_init_string)); + +#ifdef HAVE_REPLICATION +static bool check_master_connection(sys_var *self, THD *thd, set_var *var) +{ + LEX_CSTRING tmp; + tmp.str= var->save_result.string_value.str; + tmp.length= var->save_result.string_value.length; + if (!tmp.str || check_master_connection_name(&tmp)) + return true; + + return false; +} + +static Sys_var_session_lexstring Sys_default_master_connection( + "default_master_connection", + "Master connection to use for all slave variables and slave commands", + SESSION_ONLY(default_master_connection), + NO_CMD_LINE, + DEFAULT(""), MAX_CONNECTION_NAME, ON_CHECK(check_master_connection)); +#endif + +static Sys_var_charptr_fscs Sys_init_file( + "init_file", "Read SQL commands from this file at startup", + READ_ONLY GLOBAL_VAR(opt_init_file), +#ifdef DISABLE_GRANT_OPTIONS + NO_CMD_LINE, +#else + CMD_LINE(REQUIRED_ARG), +#endif + DEFAULT(0)); + +static PolyLock_rwlock PLock_sys_init_slave(&LOCK_sys_init_slave); +static Sys_var_on_access_global<Sys_var_lexstring, + PRIV_SET_SYSTEM_GLOBAL_VAR_INIT_SLAVE> +Sys_init_slave( + "init_slave", "Command(s) that are executed by a slave server " + "each time the SQL thread starts", GLOBAL_VAR(opt_init_slave), + CMD_LINE(REQUIRED_ARG), + DEFAULT(""), &PLock_sys_init_slave, + NOT_IN_BINLOG, ON_CHECK(check_init_string)); + +static Sys_var_ulong Sys_interactive_timeout( + "interactive_timeout", + "The number of seconds the server waits for activity on an interactive " + "connection before closing it", + NO_SET_STMT SESSION_VAR(net_interactive_timeout), + CMD_LINE(REQUIRED_ARG), + VALID_RANGE(1, LONG_TIMEOUT), DEFAULT(NET_WAIT_TIMEOUT), BLOCK_SIZE(1)); + +static Sys_var_ulonglong Sys_join_buffer_size( + "join_buffer_size", + "The size of the buffer that is used for joins", + SESSION_VAR(join_buff_size), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(128, SIZE_T_MAX), DEFAULT(256*1024), BLOCK_SIZE(128)); + +static Sys_var_keycache Sys_key_buffer_size( + "key_buffer_size", "The size of the buffer used for " + "index blocks for MyISAM tables. Increase this to get better index " + "handling (for all reads and multiple writes) to as much as you can " + "afford", + KEYCACHE_VAR(param_buff_size), + CMD_LINE(REQUIRED_ARG, OPT_KEY_BUFFER_SIZE), + VALID_RANGE(0, SIZE_T_MAX), DEFAULT(KEY_CACHE_SIZE), + BLOCK_SIZE(IO_SIZE), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(0), + ON_UPDATE(update_buffer_size)); + +static Sys_var_keycache Sys_key_cache_block_size( + "key_cache_block_size", "The default size of key cache blocks", + KEYCACHE_VAR(param_block_size), + CMD_LINE(REQUIRED_ARG, OPT_KEY_CACHE_BLOCK_SIZE), + VALID_RANGE(512, 1024*16), DEFAULT(KEY_CACHE_BLOCK_SIZE), + BLOCK_SIZE(512), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(0), + ON_UPDATE(resize_keycache)); + +static Sys_var_keycache Sys_key_cache_division_limit( + "key_cache_division_limit", + "The minimum percentage of warm blocks in key cache", + KEYCACHE_VAR(param_division_limit), + CMD_LINE(REQUIRED_ARG, OPT_KEY_CACHE_DIVISION_LIMIT), + VALID_RANGE(1, 100), DEFAULT(100), + BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(0), + ON_UPDATE(change_keycache_param)); + +static Sys_var_keycache Sys_key_cache_age_threshold( + "key_cache_age_threshold", "This characterizes the number of " + "hits a hot block has to be untouched until it is considered aged " + "enough to be downgraded to a warm block. This specifies the " + "percentage ratio of that number of hits to the total number of " + "blocks in key cache", + KEYCACHE_VAR(param_age_threshold), + CMD_LINE(REQUIRED_ARG, OPT_KEY_CACHE_AGE_THRESHOLD), + VALID_RANGE(100, UINT_MAX), DEFAULT(300), + BLOCK_SIZE(100), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(0), + ON_UPDATE(change_keycache_param)); + +static Sys_var_keycache Sys_key_cache_file_hash_size( + "key_cache_file_hash_size", + "Number of hash buckets for open and changed files. If you have a lot of MyISAM " + "files open you should increase this for faster flush of changes. A good " + "value is probably 1/10 of number of possible open MyISAM files.", + KEYCACHE_VAR(changed_blocks_hash_size), + CMD_LINE(REQUIRED_ARG, OPT_KEY_CACHE_CHANGED_BLOCKS_HASH_SIZE), + VALID_RANGE(128, 16384), DEFAULT(512), + BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(0), + ON_UPDATE(resize_keycache)); + +static Sys_var_mybool Sys_large_files_support( + "large_files_support", + "Whether mysqld was compiled with options for large file support", + READ_ONLY GLOBAL_VAR(opt_large_files), + CMD_LINE_HELP_ONLY, DEFAULT(sizeof(my_off_t) > 4)); + +static Sys_var_uint Sys_large_page_size( + "large_page_size", + "Previously showed the size of large memory pages, unused since " + "multiple page size support was added", + READ_ONLY GLOBAL_VAR(opt_large_page_size), NO_CMD_LINE, + VALID_RANGE(0, UINT_MAX), DEFAULT(0), BLOCK_SIZE(1), + NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(0), ON_UPDATE(0), + DEPRECATED("")); + +static Sys_var_mybool Sys_large_pages( + "large_pages", "Enable support for large pages", + READ_ONLY GLOBAL_VAR(opt_large_pages), + CMD_LINE(OPT_ARG), DEFAULT(FALSE)); + +static Sys_var_charptr_fscs Sys_language( + "lc_messages_dir", "Directory where error messages are", + READ_ONLY GLOBAL_VAR(lc_messages_dir_ptr), CMD_LINE(REQUIRED_ARG, 'L'), + DEFAULT(0)); + +static Sys_var_mybool Sys_local_infile( + "local_infile", "Enable LOAD DATA LOCAL INFILE", + GLOBAL_VAR(opt_local_infile), CMD_LINE(OPT_ARG), DEFAULT(TRUE)); + +static Sys_var_ulong Sys_lock_wait_timeout( + "lock_wait_timeout", + "Timeout in seconds to wait for a lock before returning an error.", + SESSION_VAR(lock_wait_timeout), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(0, LONG_TIMEOUT), DEFAULT(24 * 60 * 60), BLOCK_SIZE(1)); + +#ifdef HAVE_MLOCKALL +static Sys_var_mybool Sys_locked_in_memory( + "locked_in_memory", + "Whether mysqld was locked in memory with --memlock", + READ_ONLY GLOBAL_VAR(locked_in_memory), NO_CMD_LINE, DEFAULT(FALSE)); +#endif + +/* this says NO_CMD_LINE, as command-line option takes a string, not a bool */ +static Sys_var_mybool Sys_log_bin( + "log_bin", "Whether the binary log is enabled", + READ_ONLY GLOBAL_VAR(opt_bin_log), NO_CMD_LINE, DEFAULT(FALSE)); + +static Sys_var_on_access_global<Sys_var_mybool, + PRIV_SET_SYSTEM_GLOBAL_VAR_LOG_BIN_COMPRESS> +Sys_log_bin_compress( + "log_bin_compress", "Whether the binary log can be compressed", + GLOBAL_VAR(opt_bin_log_compress), CMD_LINE(OPT_ARG), DEFAULT(FALSE)); + +/* the min length is 10, means that Begin/Commit/Rollback would never be compressed! */ +static Sys_var_on_access_global<Sys_var_uint, + PRIV_SET_SYSTEM_GLOBAL_VAR_LOG_BIN_COMPRESS_MIN_LEN> +Sys_log_bin_compress_min_len( + "log_bin_compress_min_len", + "Minimum length of sql statement(in statement mode) or record(in row mode)" + "that can be compressed.", + GLOBAL_VAR(opt_bin_log_compress_min_len), + CMD_LINE(OPT_ARG), VALID_RANGE(10, 1024), DEFAULT(256), BLOCK_SIZE(1)); + +static Sys_var_on_access_global<Sys_var_mybool, + PRIV_SET_SYSTEM_GLOBAL_VAR_LOG_BIN_TRUST_FUNCTION_CREATORS> +Sys_trust_function_creators( + "log_bin_trust_function_creators", + "If set to FALSE (the default), then when --log-bin is used, creation " + "of a stored function (or trigger) is allowed only to users having the " + "SUPER privilege and only if this stored function (trigger) may not " + "break binary logging. Note that if ALL connections to this server " + "ALWAYS use row-based binary logging, the security issues do not " + "exist and the binary logging cannot break, so you can safely set " + "this to TRUE", + GLOBAL_VAR(trust_function_creators), + CMD_LINE(OPT_ARG), DEFAULT(FALSE)); + +static Sys_var_charptr_fscs Sys_log_error( + "log_error", + "Log errors to file (instead of stdout). If file name is not specified " + "then 'datadir'/'log-basename'.err or the 'pid-file' path with extension " + ".err is used", + READ_ONLY GLOBAL_VAR(log_error_file_ptr), + CMD_LINE(OPT_ARG, OPT_LOG_ERROR), + DEFAULT(disabled_my_option)); + +static Sys_var_bit Sys_log_queries_not_using_indexes( + "log_queries_not_using_indexes", + "Log queries that are executed without benefit of any index to the " + "slow log if it is open. Same as log_slow_filter='not_using_index'", + SESSION_VAR(log_slow_filter), CMD_LINE(OPT_ARG), QPLAN_NOT_USING_INDEX, + DEFAULT(FALSE)); + +static Sys_var_bit Sys_log_slow_admin_statements( + "log_slow_admin_statements", + "Log slow OPTIMIZE, ANALYZE, ALTER and other administrative statements " + "to the slow log if it is open. Resets or sets the option 'admin' in " + "log_slow_disabled_statements", + SESSION_VAR(log_slow_disabled_statements), + CMD_LINE(OPT_ARG), REVERSE(LOG_SLOW_DISABLE_ADMIN), DEFAULT(TRUE)); + +static Sys_var_bit Sys_log_slow_slave_statements( + "log_slow_slave_statements", + "Log slow statements executed by slave thread to the slow log if it is " + "open. Resets or sets the option 'slave' in " + "log_slow_disabled_statements", + SESSION_VAR(log_slow_disabled_statements), + CMD_LINE(OPT_ARG), REVERSE(LOG_SLOW_DISABLE_SLAVE), DEFAULT(TRUE)); + +static Sys_var_ulong Sys_log_warnings( + "log_warnings", + "Log some not critical warnings to the general log file." + "Value can be between 0 and 11. Higher values mean more verbosity", + SESSION_VAR(log_warnings), + CMD_LINE(OPT_ARG, 'W'), + VALID_RANGE(0, UINT_MAX), DEFAULT(2), BLOCK_SIZE(1)); + +static bool update_cached_long_query_time(sys_var *self, THD *thd, + enum_var_type type) +{ + if (type == OPT_SESSION) + thd->variables.long_query_time= + double2ulonglong(thd->variables.long_query_time_double * 1e6); + else + global_system_variables.long_query_time= + double2ulonglong(global_system_variables.long_query_time_double * 1e6); + return false; +} + +static Sys_var_double Sys_long_query_time( + "long_query_time", + "Alias for log_slow_query_time. " + "Log all queries that have taken more than long_query_time seconds " + "to execute to the slow query log file. The argument will be treated " + "as a decimal value with microsecond precision", + SESSION_VAR(long_query_time_double), + CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, LONG_TIMEOUT), DEFAULT(10), + NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(0), + ON_UPDATE(update_cached_long_query_time)); + +static Sys_var_double Sys_log_slow_query_time( + "log_slow_query_time", + "Log all queries that have taken more than log_slow_query_time seconds " + "to execute to the slow query log file. The argument will be treated " + "as a decimal value with microsecond precision", + SESSION_VAR(long_query_time_double), + CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, LONG_TIMEOUT), DEFAULT(10), + NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(0), + ON_UPDATE(update_cached_long_query_time)); + +static bool update_cached_max_statement_time(sys_var *self, THD *thd, + enum_var_type type) +{ + if (type == OPT_SESSION) + thd->variables.max_statement_time= + double2ulonglong(thd->variables.max_statement_time_double * 1e6); + else + global_system_variables.max_statement_time= + double2ulonglong(global_system_variables.max_statement_time_double * 1e6); + return false; +} + +static Sys_var_double Sys_max_statement_time( + "max_statement_time", + "A query that has taken more than max_statement_time seconds " + "will be aborted. The argument will be treated as a decimal value " + "with microsecond precision. A value of 0 (default) means no timeout", + SESSION_VAR(max_statement_time_double), + CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, LONG_TIMEOUT), DEFAULT(0), + NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(0), + ON_UPDATE(update_cached_max_statement_time)); + +static bool fix_low_prio_updates(sys_var *self, THD *thd, enum_var_type type) +{ + if (type == OPT_SESSION) + thd->update_lock_default= (thd->variables.low_priority_updates ? + TL_WRITE_LOW_PRIORITY : TL_WRITE); + else + thr_upgraded_concurrent_insert_lock= + (global_system_variables.low_priority_updates ? + TL_WRITE_LOW_PRIORITY : TL_WRITE); + return false; +} +static Sys_var_mybool Sys_low_priority_updates( + "low_priority_updates", + "INSERT/DELETE/UPDATE has lower priority than selects", + SESSION_VAR(low_priority_updates), + CMD_LINE(OPT_ARG), + DEFAULT(FALSE), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(0), + ON_UPDATE(fix_low_prio_updates)); + +static Sys_var_mybool Sys_lower_case_file_system( + "lower_case_file_system", + "Case sensitivity of file names on the file system where the " + "data directory is located", + READ_ONLY GLOBAL_VAR(lower_case_file_system), + CMD_LINE_HELP_ONLY, + DEFAULT(FALSE)); + +static Sys_var_uint Sys_lower_case_table_names( + "lower_case_table_names", + "If set to 1 table names are stored in lowercase on disk and table " + "names will be case-insensitive. Should be set to 2 if you are using " + "a case insensitive file system", + READ_ONLY GLOBAL_VAR(lower_case_table_names), + CMD_LINE(OPT_ARG, OPT_LOWER_CASE_TABLE_NAMES), + VALID_RANGE(0, 2), +#ifdef FN_NO_CASE_SENSE + DEFAULT(1), +#else + DEFAULT(0), +#endif + BLOCK_SIZE(1)); + +static bool session_readonly(sys_var *self, THD *thd, set_var *var) +{ + if (var->type == OPT_GLOBAL) + return false; + my_error(ER_VARIABLE_IS_READONLY, MYF(0), "SESSION", + self->name.str, "GLOBAL"); + return true; +} + +static bool check_max_allowed_packet(sys_var *self, THD *thd, set_var *var) +{ + longlong val; + if (session_readonly(self, thd, var)) + return true; + + val= var->save_result.ulonglong_value; + if (val < (longlong) global_system_variables.net_buffer_length) + { + push_warning_printf(thd, Sql_condition::WARN_LEVEL_WARN, + WARN_OPTION_BELOW_LIMIT, + ER_THD(thd, WARN_OPTION_BELOW_LIMIT), + "max_allowed_packet", "net_buffer_length"); + } + return false; +} + + +static Sys_var_ulong Sys_max_allowed_packet( + "max_allowed_packet", + "Max packet length to send to or receive from the server", + SESSION_VAR(max_allowed_packet), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(1024, 1024*1024*1024), DEFAULT(16*1024*1024), + BLOCK_SIZE(1024), NO_MUTEX_GUARD, NOT_IN_BINLOG, + ON_CHECK(check_max_allowed_packet)); + +static Sys_var_on_access_global<Sys_var_ulong, + PRIV_SET_SYSTEM_GLOBAL_VAR_SLAVE_MAX_ALLOWED_PACKET> +Sys_slave_max_allowed_packet( + "slave_max_allowed_packet", + "The maximum packet length to sent successfully from the master to slave.", + GLOBAL_VAR(slave_max_allowed_packet), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(1024, MAX_MAX_ALLOWED_PACKET), + DEFAULT(MAX_MAX_ALLOWED_PACKET), BLOCK_SIZE(1024)); + +static Sys_var_on_access_global<Sys_var_ulonglong, + PRIV_SET_SYSTEM_GLOBAL_VAR_MAX_BINLOG_CACHE_SIZE> +Sys_max_binlog_cache_size( + "max_binlog_cache_size", + "Sets the total size of the transactional cache", + GLOBAL_VAR(max_binlog_cache_size), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(IO_SIZE, SIZE_T_MAX), + DEFAULT((SIZE_T_MAX/IO_SIZE)*IO_SIZE), BLOCK_SIZE(IO_SIZE)); + +static Sys_var_on_access_global<Sys_var_ulonglong, + PRIV_SET_SYSTEM_GLOBAL_VAR_MAX_BINLOG_STMT_CACHE_SIZE> +Sys_max_binlog_stmt_cache_size( + "max_binlog_stmt_cache_size", + "Sets the total size of the statement cache", + GLOBAL_VAR(max_binlog_stmt_cache_size), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(IO_SIZE, SIZE_T_MAX), + DEFAULT((SIZE_T_MAX/IO_SIZE)*IO_SIZE), BLOCK_SIZE(IO_SIZE)); + +static bool fix_max_binlog_size(sys_var *self, THD *thd, enum_var_type type) +{ + mysql_bin_log.set_max_size(max_binlog_size); + return false; +} +static Sys_var_on_access_global<Sys_var_ulong, + PRIV_SET_SYSTEM_GLOBAL_VAR_MAX_BINLOG_SIZE> +Sys_max_binlog_size( + "max_binlog_size", + "Binary log will be rotated automatically when the size exceeds this " + "value.", + GLOBAL_VAR(max_binlog_size), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(IO_SIZE, 1024*1024L*1024L), DEFAULT(1024*1024L*1024L), + BLOCK_SIZE(IO_SIZE), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(0), + ON_UPDATE(fix_max_binlog_size)); + +static bool fix_max_connections(sys_var *self, THD *thd, enum_var_type type) +{ +#ifndef EMBEDDED_LIBRARY + resize_thr_alarm(max_connections + extra_max_connections + + global_system_variables.max_insert_delayed_threads + 10); +#endif + return false; +} + +// Default max_connections of 151 is larger than Apache's default max +// children, to avoid "too many connections" error in a common setup +static Sys_var_on_access_global<Sys_var_ulong, + PRIV_SET_SYSTEM_GLOBAL_VAR_MAX_CONNECTIONS> +Sys_max_connections( + "max_connections", "The number of simultaneous clients allowed", + PARSED_EARLY GLOBAL_VAR(max_connections), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(10, 100000), + DEFAULT(MAX_CONNECTIONS_DEFAULT), BLOCK_SIZE(1), NO_MUTEX_GUARD, + NOT_IN_BINLOG, ON_CHECK(0), ON_UPDATE(fix_max_connections)); + +static Sys_var_uint Sys_default_password_lifetime( + "default_password_lifetime", + "This defines the global password expiration policy. 0 means " + "automatic password expiration is disabled. If the value is a " + "positive integer N, the passwords must be changed every N days. This " + "behavior can be overridden using the password expiration options in " + "ALTER USER.", + GLOBAL_VAR(default_password_lifetime), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(0, UINT_MAX), DEFAULT(0), BLOCK_SIZE(1)); + +static Sys_var_on_access_global<Sys_var_mybool, + PRIV_SET_SYSTEM_GLOBAL_VAR_DISCONNECT_ON_EXPIRED_PASSWORD> +Sys_disconnect_on_expired_password( + "disconnect_on_expired_password", + "This variable controls how the server handles clients that are not " + "aware of the sandbox mode. If enabled, the server disconnects the " + "client, otherwise the server puts the client in a sandbox mode.", + GLOBAL_VAR(disconnect_on_expired_password), CMD_LINE(OPT_ARG), + DEFAULT(FALSE)); + +static Sys_var_on_access_global<Sys_var_ulong, + PRIV_SET_SYSTEM_GLOBAL_VAR_MAX_CONNECT_ERRORS> +Sys_max_connect_errors( + "max_connect_errors", + "If there is more than this number of interrupted connections from " + "a host this host will be blocked from further connections", + GLOBAL_VAR(max_connect_errors), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(1, UINT_MAX), DEFAULT(MAX_CONNECT_ERRORS), + BLOCK_SIZE(1)); + +static Sys_var_on_access_global<Sys_var_uint, + PRIV_SET_SYSTEM_GLOBAL_VAR_MAX_PASSWORD_ERRORS> +Sys_max_password_errors( + "max_password_errors", + "If there is more than this number of failed connect attempts " + "due to invalid password, user will be blocked from further connections until FLUSH_PRIVILEGES.", + GLOBAL_VAR(max_password_errors), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(1, UINT_MAX), DEFAULT(UINT_MAX), + BLOCK_SIZE(1)); + +static Sys_var_uint Sys_max_digest_length( + "max_digest_length", "Maximum length considered for digest text.", + READ_ONLY GLOBAL_VAR(max_digest_length), + CMD_LINE(REQUIRED_ARG), + VALID_RANGE(0, 1024 * 1024), DEFAULT(1024), BLOCK_SIZE(1)); + +static bool check_max_delayed_threads(sys_var *self, THD *thd, set_var *var) +{ + return var->type != OPT_GLOBAL && + var->save_result.ulonglong_value != 0 && + var->save_result.ulonglong_value != + global_system_variables.max_insert_delayed_threads; +} + +static Sys_var_ulong Sys_max_insert_delayed_threads( + "max_insert_delayed_threads", + "Alias for max_delayed_threads. " + "Don't start more than this number of threads to handle INSERT " + "DELAYED statements. If set to zero INSERT DELAYED will be not used", + SESSION_VAR(max_insert_delayed_threads), + NO_CMD_LINE, VALID_RANGE(0, 16384), DEFAULT(20), + BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, + ON_CHECK(check_max_delayed_threads), ON_UPDATE(fix_max_connections)); + +static Sys_var_ulong Sys_max_delayed_threads( + "max_delayed_threads", + "Don't start more than this number of threads to handle INSERT " + "DELAYED statements. If set to zero INSERT DELAYED will be not used", + SESSION_VAR(max_insert_delayed_threads), + CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, 16384), DEFAULT(20), + BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, + ON_CHECK(check_max_delayed_threads), ON_UPDATE(fix_max_connections)); + +static Sys_var_ulong Sys_max_error_count( + "max_error_count", + "Max number of errors/warnings to store for a statement", + SESSION_VAR(max_error_count), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(0, 65535), DEFAULT(DEFAULT_ERROR_COUNT), BLOCK_SIZE(1)); + +static Sys_var_ulonglong Sys_max_heap_table_size( + "max_heap_table_size", + "Don't allow creation of heap tables bigger than this", + SESSION_VAR(max_heap_table_size), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(16384, SIZE_T_MAX), DEFAULT(16*1024*1024), + BLOCK_SIZE(1024)); + +static ulong mdl_locks_cache_size; +static Sys_var_ulong Sys_metadata_locks_cache_size( + "metadata_locks_cache_size", "Unused", + READ_ONLY GLOBAL_VAR(mdl_locks_cache_size), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(1, 1024*1024), DEFAULT(1024), + BLOCK_SIZE(1)); + +static ulong mdl_locks_hash_partitions; +static Sys_var_ulong Sys_metadata_locks_hash_instances( + "metadata_locks_hash_instances", "Unused", + READ_ONLY GLOBAL_VAR(mdl_locks_hash_partitions), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(1, 1024), DEFAULT(8), + BLOCK_SIZE(1)); + +static Sys_var_on_access_session<Sys_var_ulonglong, + PRIV_SET_SYSTEM_SESSION_VAR_PSEUDO_THREAD_ID> +Sys_pseudo_thread_id( + "pseudo_thread_id", + "This variable is for internal server use", + SESSION_ONLY(pseudo_thread_id), + NO_CMD_LINE, VALID_RANGE(0, ULONGLONG_MAX), DEFAULT(0), + BLOCK_SIZE(1), NO_MUTEX_GUARD, IN_BINLOG); + +static bool +check_gtid_domain_id(sys_var *self, THD *thd, set_var *var) +{ + if (var->type != OPT_GLOBAL && + error_if_in_trans_or_substatement(thd, + ER_STORED_FUNCTION_PREVENTS_SWITCH_GTID_DOMAIN_ID_SEQ_NO, + ER_INSIDE_TRANSACTION_PREVENTS_SWITCH_GTID_DOMAIN_ID_SEQ_NO)) + return true; + + return false; +} + + +static Sys_var_on_access<Sys_var_uint, + PRIV_SET_SYSTEM_GLOBAL_VAR_GTID_DOMAIN_ID, + PRIV_SET_SYSTEM_SESSION_VAR_GTID_DOMAIN_ID> +Sys_gtid_domain_id( + "gtid_domain_id", + "Used with global transaction ID to identify logically independent " + "replication streams. When events can propagate through multiple " + "parallel paths (for example multiple masters), each independent " + "source server must use a distinct domain_id. For simple tree-shaped " + "replication topologies, it can be left at its default, 0.", + SESSION_VAR(gtid_domain_id), + CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, UINT_MAX32), DEFAULT(0), + BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, + ON_CHECK(check_gtid_domain_id)); + + +/* + Check that setting gtid_seq_no isn't done inside a transaction, and (in + gtid_strict_mode) doesn't create an out-of-order GTID sequence. + + Setting gtid_seq_no to DEFAULT or 0 means we 'reset' it so that the value + doesn't affect the GTID of the next event group written to the binlog. +*/ +static bool check_gtid_seq_no(sys_var *self, THD *thd, set_var *var) +{ + uint32 domain_id, server_id; + uint64 seq_no; + + if (unlikely(error_if_in_trans_or_substatement(thd, + ER_STORED_FUNCTION_PREVENTS_SWITCH_GTID_DOMAIN_ID_SEQ_NO, + ER_INSIDE_TRANSACTION_PREVENTS_SWITCH_GTID_DOMAIN_ID_SEQ_NO))) + return true; + + DBUG_EXECUTE_IF("ignore_set_gtid_seq_no_check", return false;); + if (var->value && opt_gtid_strict_mode && opt_bin_log) + { + domain_id= thd->variables.gtid_domain_id; + server_id= thd->variables.server_id; + seq_no= (uint64)var->value->val_uint(); + if (seq_no != 0 && + mysql_bin_log.check_strict_gtid_sequence(domain_id, server_id, seq_no)) + return true; + } + + return false; +} + + +static Sys_var_on_access_session<Sys_var_ulonglong, + PRIV_SET_SYSTEM_SESSION_VAR_GTID_SEQ_NO> +Sys_gtid_seq_no( + "gtid_seq_no", + "Internal server usage, for replication with global transaction id. " + "When set, next event group logged to the binary log will use this " + "sequence number, not generate a new one, thus allowing to preserve " + "master's GTID in slave's binlog.", + SESSION_ONLY(gtid_seq_no), + NO_CMD_LINE, VALID_RANGE(0, ULONGLONG_MAX), DEFAULT(0), + BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, + ON_CHECK(check_gtid_seq_no)); + + +#ifdef HAVE_REPLICATION +static unsigned char opt_gtid_binlog_pos_dummy; +static Sys_var_gtid_binlog_pos Sys_gtid_binlog_pos( + "gtid_binlog_pos", "Last GTID logged to the binary log, per replication" + "domain", + READ_ONLY GLOBAL_VAR(opt_gtid_binlog_pos_dummy), NO_CMD_LINE); + + +const uchar * +Sys_var_gtid_binlog_pos::global_value_ptr(THD *thd, + const LEX_CSTRING *base) const +{ + char buf[128]; + String str(buf, sizeof(buf), system_charset_info); + char *p; + + str.length(0); + if ((opt_bin_log && mysql_bin_log.append_state_pos(&str)) || + !(p= thd->strmake(str.ptr(), str.length()))) + { + my_error(ER_OUT_OF_RESOURCES, MYF(0)); + return NULL; + } + + return (uchar *)p; +} + + +static unsigned char opt_gtid_current_pos_dummy; +static Sys_var_gtid_current_pos Sys_gtid_current_pos( + "gtid_current_pos", "Current GTID position of the server. Per " + "replication domain, this is either the last GTID replicated by a " + "slave thread, or the GTID logged to the binary log, whichever is " + "most recent.", + READ_ONLY GLOBAL_VAR(opt_gtid_current_pos_dummy), NO_CMD_LINE); + + +const uchar * +Sys_var_gtid_current_pos::global_value_ptr(THD *thd, + const LEX_CSTRING *base) const +{ + String str; + char *p; + + str.length(0); + if (rpl_append_gtid_state(&str, true) || + !(p= thd->strmake(str.ptr(), str.length()))) + { + my_error(ER_OUT_OF_RESOURCES, MYF(0)); + return NULL; + } + + return (uchar *)p; +} + + +bool +Sys_var_gtid_slave_pos::do_check(THD *thd, set_var *var) +{ + String str, *res; + + DBUG_ASSERT(var->type == OPT_GLOBAL); + + if (rpl_load_gtid_slave_state(thd)) + { + my_error(ER_CANNOT_LOAD_SLAVE_GTID_STATE, MYF(0), "mysql", + rpl_gtid_slave_state_table_name.str); + return true; + } + + if (give_error_if_slave_running(0)) + return true; + if (!(res= var->value->val_str(&str))) + return true; + if (thd->in_active_multi_stmt_transaction()) + { + my_error(ER_CANT_DO_THIS_DURING_AN_TRANSACTION, MYF(0)); + return true; + } + if (rpl_gtid_pos_check(thd, &((*res)[0]), res->length())) + return true; + + if (!(var->save_result.string_value.str= + thd->strmake(res->ptr(), res->length()))) + { + my_error(ER_OUT_OF_RESOURCES, MYF(0)); + return true; + } + var->save_result.string_value.length= res->length(); + return false; +} + + +bool +Sys_var_gtid_slave_pos::global_update(THD *thd, set_var *var) +{ + bool err; + + DBUG_ASSERT(var->type == OPT_GLOBAL); + + if (!var->value) + { + my_error(ER_NO_DEFAULT, MYF(0), var->var->name.str); + return true; + } + + mysql_mutex_unlock(&LOCK_global_system_variables); + mysql_mutex_lock(&LOCK_active_mi); + if (give_error_if_slave_running(1)) + err= true; + else + err= rpl_gtid_pos_update(thd, var->save_result.string_value.str, + var->save_result.string_value.length); + mysql_mutex_unlock(&LOCK_active_mi); + mysql_mutex_lock(&LOCK_global_system_variables); + return err; +} + + +const uchar * +Sys_var_gtid_slave_pos::global_value_ptr(THD *thd, + const LEX_CSTRING *base) const +{ + String str; + char *p; + + str.length(0); + /* + If the mysql.rpl_slave_pos table could not be loaded, then we cannot + easily automatically try to reload it here - we may be inside a statement + that already has tables locked and so opening more tables is problematic. + + But if the table is not loaded (eg. missing mysql_upgrade_db or some such), + then the slave state must be empty anyway. + */ + if ((rpl_global_gtid_slave_state->loaded && + rpl_append_gtid_state(&str, false)) || + !(p= thd->strmake(str.ptr(), str.length()))) + { + my_error(ER_OUT_OF_RESOURCES, MYF(0)); + return NULL; + } + + return (uchar *)p; +} + + +static unsigned char opt_gtid_slave_pos_dummy; +static Sys_var_gtid_slave_pos Sys_gtid_slave_pos( + "gtid_slave_pos", + "The list of global transaction IDs that were last replicated on the " + "server, one for each replication domain.", + GLOBAL_VAR(opt_gtid_slave_pos_dummy), NO_CMD_LINE); + + +static Sys_var_on_access_global<Sys_var_mybool, + PRIV_SET_SYSTEM_GLOBAL_VAR_GTID_STRICT_MODE> +Sys_gtid_strict_mode( + "gtid_strict_mode", + "Enforce strict seq_no ordering of events in the binary log. Slave " + "stops with an error if it encounters an event that would cause it to " + "generate an out-of-order binlog if executed. " + "When ON the same server-id semisync-replicated transactions that " + "duplicate existing ones in binlog are ignored without error " + "and slave interruption.", + GLOBAL_VAR(opt_gtid_strict_mode), + CMD_LINE(OPT_ARG), DEFAULT(FALSE)); + + +struct gtid_binlog_state_data { rpl_gtid *list; uint32 list_len; }; + +bool +Sys_var_gtid_binlog_state::do_check(THD *thd, set_var *var) +{ + String str, *res; + struct gtid_binlog_state_data *data; + rpl_gtid *list; + uint32 list_len; + + DBUG_ASSERT(var->type == OPT_GLOBAL); + + if (!(res= var->value->val_str(&str))) + return true; + if (thd->in_active_multi_stmt_transaction()) + { + my_error(ER_CANT_DO_THIS_DURING_AN_TRANSACTION, MYF(0)); + return true; + } + if (!mysql_bin_log.is_open()) + { + my_error(ER_FLUSH_MASTER_BINLOG_CLOSED, MYF(0)); + return true; + } + if (!mysql_bin_log.is_empty_state()) + { + my_error(ER_BINLOG_MUST_BE_EMPTY, MYF(0)); + return true; + } + if (res->length() == 0) + { + list= NULL; + list_len= 0; + } + else if (!(list= gtid_parse_string_to_list(res->ptr(), res->length(), + &list_len))) + { + my_error(ER_INCORRECT_GTID_STATE, MYF(0)); + return true; + } + if (!(data= (gtid_binlog_state_data *)my_malloc(PSI_INSTRUMENT_ME, + sizeof(*data), MYF(0)))) + { + my_free(list); + my_error(ER_OUT_OF_RESOURCES, MYF(0)); + return true; + } + data->list= list; + data->list_len= list_len; + var->save_result.ptr= data; + return false; +} + + +bool +Sys_var_gtid_binlog_state::global_update(THD *thd, set_var *var) +{ + bool res; + + DBUG_ASSERT(var->type == OPT_GLOBAL); + + if (!var->value) + { + my_error(ER_NO_DEFAULT, MYF(0), var->var->name.str); + return true; + } + + struct gtid_binlog_state_data *data= + (struct gtid_binlog_state_data *)var->save_result.ptr; + mysql_mutex_unlock(&LOCK_global_system_variables); + res= (reset_master(thd, data->list, data->list_len, 0) != 0); + mysql_mutex_lock(&LOCK_global_system_variables); + my_free(data->list); + my_free(data); + return res; +} + + +const uchar * +Sys_var_gtid_binlog_state::global_value_ptr(THD *thd, + const LEX_CSTRING *base) const +{ + char buf[512]; + String str(buf, sizeof(buf), system_charset_info); + char *p; + + str.length(0); + if ((opt_bin_log && mysql_bin_log.append_state(&str)) || + !(p= thd->strmake(str.ptr(), str.length()))) + { + my_error(ER_OUT_OF_RESOURCES, MYF(0)); + return NULL; + } + + return (uchar *)p; +} + + +static unsigned char opt_gtid_binlog_state_dummy; +static Sys_var_gtid_binlog_state Sys_gtid_binlog_state( + "gtid_binlog_state", + "The internal GTID state of the binlog, used to keep track of all " + "GTIDs ever logged to the binlog.", + GLOBAL_VAR(opt_gtid_binlog_state_dummy), NO_CMD_LINE); + + +static Sys_var_last_gtid Sys_last_gtid( + "last_gtid", "The GTID of the last commit (if binlogging was enabled), " + "or the empty string if none.", + READ_ONLY sys_var::ONLY_SESSION, NO_CMD_LINE); + +export sys_var *Sys_last_gtid_ptr= &Sys_last_gtid; // for check changing + + +const uchar * +Sys_var_last_gtid::session_value_ptr(THD *thd, const LEX_CSTRING *base) const +{ + char buf[10+1+10+1+20+1]; + String str(buf, sizeof(buf), system_charset_info); + char *p; + bool first= true; + + str.length(0); + rpl_gtid gtid= thd->get_last_commit_gtid(); + if ((gtid.seq_no > 0 && + rpl_slave_state_tostring_helper(&str, >id, &first)) || + !(p= thd->strmake(str.ptr(), str.length()))) + { + my_error(ER_OUT_OF_RESOURCES, MYF(0)); + return NULL; + } + + return (uchar *)p; +} + + +static Sys_var_on_access_global<Sys_var_uint, + PRIV_SET_SYSTEM_GLOBAL_VAR_GTID_CLEANUP_BATCH_SIZE> +Sys_gtid_cleanup_batch_size( + "gtid_cleanup_batch_size", + "Normally does not need tuning. How many old rows must accumulate in " + "the mysql.gtid_slave_pos table before a background job will be run to " + "delete them. Can be increased to reduce number of commits if " + "using many different engines with --gtid_pos_auto_engines, or to " + "reduce CPU overhead if using a huge number of different " + "gtid_domain_ids. Can be decreased to reduce number of old rows in the " + "table.", + GLOBAL_VAR(opt_gtid_cleanup_batch_size), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(0,2147483647), DEFAULT(64), BLOCK_SIZE(1)); + + +static bool +check_slave_parallel_threads(sys_var *self, THD *thd, set_var *var) +{ + return give_error_if_slave_running(0); +} + +static bool +fix_slave_parallel_threads(sys_var *self, THD *thd, enum_var_type type) +{ + bool err; + + mysql_mutex_unlock(&LOCK_global_system_variables); + err= give_error_if_slave_running(0); + mysql_mutex_lock(&LOCK_global_system_variables); + + return err; +} + + +static Sys_var_on_access_global<Sys_var_ulong, + PRIV_SET_SYSTEM_GLOBAL_VAR_SLAVE_PARALLEL_THREADS> +Sys_slave_parallel_threads( + "slave_parallel_threads", + "If non-zero, number of threads to spawn to apply in parallel events " + "on the slave that were group-committed on the master or were logged " + "with GTID in different replication domains. Note that these threads " + "are in addition to the IO and SQL threads, which are always created " + "by a replication slave", + GLOBAL_VAR(opt_slave_parallel_threads), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(0,16383), DEFAULT(0), BLOCK_SIZE(1), NO_MUTEX_GUARD, + NOT_IN_BINLOG, ON_CHECK(check_slave_parallel_threads), + ON_UPDATE(fix_slave_parallel_threads)); + +/* Alias for @@slave_parallel_threads to match what MySQL 5.7 uses. */ +static Sys_var_on_access_global<Sys_var_ulong, + PRIV_SET_SYSTEM_GLOBAL_VAR_SLAVE_PARALLEL_WORKERS> +Sys_slave_parallel_workers( + "slave_parallel_workers", + "Alias for slave_parallel_threads", + GLOBAL_VAR(opt_slave_parallel_threads), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(0,16383), DEFAULT(0), BLOCK_SIZE(1), NO_MUTEX_GUARD, + NOT_IN_BINLOG, ON_CHECK(check_slave_parallel_threads), + ON_UPDATE(fix_slave_parallel_threads)); + + +static bool +check_slave_domain_parallel_threads(sys_var *self, THD *thd, set_var *var) +{ + return give_error_if_slave_running(0); +} + +static bool +fix_slave_domain_parallel_threads(sys_var *self, THD *thd, enum_var_type type) +{ + bool running; + + mysql_mutex_unlock(&LOCK_global_system_variables); + running= give_error_if_slave_running(0); + mysql_mutex_lock(&LOCK_global_system_variables); + + return running; +} + + +static Sys_var_on_access_global<Sys_var_ulong, + PRIV_SET_SYSTEM_GLOBAL_VAR_SLAVE_DOMAIN_PARALLEL_THREADS> +Sys_slave_domain_parallel_threads( + "slave_domain_parallel_threads", + "Maximum number of parallel threads to use on slave for events in a " + "single replication domain. When using multiple domains, this can be " + "used to limit a single domain from grabbing all threads and thus " + "stalling other domains. The default of 0 means to allow a domain to " + "grab as many threads as it wants, up to the value of " + "slave_parallel_threads.", + GLOBAL_VAR(opt_slave_domain_parallel_threads), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(0,16383), DEFAULT(0), BLOCK_SIZE(1), NO_MUTEX_GUARD, + NOT_IN_BINLOG, ON_CHECK(check_slave_domain_parallel_threads), + ON_UPDATE(fix_slave_domain_parallel_threads)); + + +static Sys_var_on_access_global<Sys_var_ulong, + PRIV_SET_SYSTEM_GLOBAL_VAR_SLAVE_PARALLEL_MAX_QUEUED> +Sys_slave_parallel_max_queued( + "slave_parallel_max_queued", + "Limit on how much memory SQL threads should use per parallel " + "replication thread when reading ahead in the relay log looking for " + "opportunities for parallel replication. Only used when " + "--slave-parallel-threads > 0.", + GLOBAL_VAR(opt_slave_parallel_max_queued), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(0,2147483647), DEFAULT(131072), BLOCK_SIZE(1)); + + +bool +Sys_var_slave_parallel_mode::global_update(THD *thd, set_var *var) +{ + enum_slave_parallel_mode new_value= + (enum_slave_parallel_mode)var->save_result.ulonglong_value; + LEX_CSTRING *base_name= &var->base; + Master_info *mi; + bool res= false; + + if (!base_name->length) + base_name= &thd->variables.default_master_connection; + + mysql_mutex_unlock(&LOCK_global_system_variables); + mysql_mutex_lock(&LOCK_active_mi); + + mi= master_info_index-> + get_master_info(base_name, !base_name->length ? + Sql_condition::WARN_LEVEL_ERROR : + Sql_condition::WARN_LEVEL_WARN); + + if (mi) + { + if (mi->rli.slave_running) + { + my_error(ER_SLAVE_MUST_STOP, MYF(0), + (int) mi->connection_name.length, mi->connection_name.str); + res= true; + } + else + { + mi->parallel_mode= new_value; + if (!base_name->length) + { + /* Use as default value for new connections */ + opt_slave_parallel_mode= new_value; + } + } + } + + mysql_mutex_unlock(&LOCK_active_mi); + mysql_mutex_lock(&LOCK_global_system_variables); + + return res; +} + + +const uchar * +Sys_var_slave_parallel_mode::global_value_ptr(THD *thd, + const + LEX_CSTRING *base_name) const +{ + Master_info *mi; + enum_slave_parallel_mode val= + (enum_slave_parallel_mode)opt_slave_parallel_mode; + + if (!base_name->length) + base_name= &thd->variables.default_master_connection; + + mysql_mutex_unlock(&LOCK_global_system_variables); + mysql_mutex_lock(&LOCK_active_mi); + + mi= master_info_index-> + get_master_info(base_name, !base_name->length ? + Sql_condition::WARN_LEVEL_ERROR : + Sql_condition::WARN_LEVEL_WARN); + if (mi) + val= mi->parallel_mode; + + mysql_mutex_unlock(&LOCK_active_mi); + mysql_mutex_lock(&LOCK_global_system_variables); + if (!mi) + return 0; + + return valptr(thd, val); +} + + +/* The order here must match enum_slave_parallel_mode in mysqld.h. */ +static const char *slave_parallel_mode_names[] = { + "none", "minimal", "conservative", "optimistic", "aggressive", NULL +}; +export TYPELIB slave_parallel_mode_typelib = { + array_elements(slave_parallel_mode_names)-1, + "", + slave_parallel_mode_names, + NULL +}; + +static Sys_var_on_access_global<Sys_var_slave_parallel_mode, + PRIV_SET_SYSTEM_GLOBAL_VAR_SLAVE_PARALLEL_MODE> +Sys_slave_parallel_mode( + "slave_parallel_mode", + "Controls what transactions are applied in parallel when using " + "--slave-parallel-threads. Possible values: \"optimistic\" tries to " + "apply most transactional DML in parallel, and handles any conflicts " + "with rollback and retry. \"conservative\" limits parallelism in an " + "effort to avoid any conflicts. \"aggressive\" tries to maximise the " + "parallelism, possibly at the cost of increased conflict rate. " + "\"minimal\" only parallelizes the commit steps of transactions. " + "\"none\" disables parallel apply completely.", + GLOBAL_VAR(opt_slave_parallel_mode), NO_CMD_LINE, + slave_parallel_mode_names, DEFAULT(SLAVE_PARALLEL_OPTIMISTIC)); + + +static Sys_var_bit Sys_skip_parallel_replication( + "skip_parallel_replication", + "If set when a transaction is written to the binlog, parallel apply of " + "that transaction will be avoided on a slave where slave_parallel_mode " + "is not \"aggressive\". Can be used to avoid unnecessary rollback and " + "retry for transactions that are likely to cause a conflict if " + "replicated in parallel.", + SESSION_ONLY(option_bits), NO_CMD_LINE, OPTION_RPL_SKIP_PARALLEL, + DEFAULT(FALSE)); + +static Sys_var_mybool Sys_binlog_alter_two_phase( + "binlog_alter_two_phase", + "When set, split ALTER at binary logging into 2 statements: " + "START ALTER and COMMIT/ROLLBACK ALTER", + SESSION_VAR(binlog_alter_two_phase), CMD_LINE(OPT_ARG), + DEFAULT(FALSE)); + +static bool +check_gtid_ignore_duplicates(sys_var *self, THD *thd, set_var *var) +{ + return give_error_if_slave_running(0); +} + +static bool +fix_gtid_ignore_duplicates(sys_var *self, THD *thd, enum_var_type type) +{ + bool running; + + mysql_mutex_unlock(&LOCK_global_system_variables); + running= give_error_if_slave_running(0); + mysql_mutex_lock(&LOCK_global_system_variables); + + return running; +} + + +static Sys_var_on_access_global<Sys_var_mybool, + PRIV_SET_SYSTEM_GLOBAL_VAR_GTID_IGNORE_DUPLICATES> +Sys_gtid_ignore_duplicates( + "gtid_ignore_duplicates", + "When set, different master connections in multi-source replication are " + "allowed to receive and process event groups with the same GTID (when " + "using GTID mode). Only one will be applied, any others will be " + "ignored. Within a given replication domain, just the sequence number " + "will be used to decide whether a given GTID has been already applied; " + "this means it is the responsibility of the user to ensure that GTID " + "sequence numbers are strictly increasing.", + GLOBAL_VAR(opt_gtid_ignore_duplicates), CMD_LINE(OPT_ARG), + DEFAULT(FALSE), NO_MUTEX_GUARD, + NOT_IN_BINLOG, ON_CHECK(check_gtid_ignore_duplicates), + ON_UPDATE(fix_gtid_ignore_duplicates)); + +static bool +update_slave_max_statement_time(sys_var *self, THD *thd, enum_var_type type) +{ + slave_max_statement_time= + double2ulonglong(slave_max_statement_time_double * 1e6); + + return false; +} + +static Sys_var_on_access_global< + Sys_var_double, PRIV_SET_SYSTEM_GLOBAL_VAR_SLAVE_MAX_STATEMENT_TIME> + Sys_slave_max_statement_time( + "slave_max_statement_time", + "A query that has taken more than slave_max_statement_time seconds to " + "run on the slave will be aborted. The argument will be treated as a " + "decimal value with microsecond precision. A value of 0 (default) " + "means no timeout", + GLOBAL_VAR(slave_max_statement_time_double), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(0, LONG_TIMEOUT), DEFAULT(0), NO_MUTEX_GUARD, + NOT_IN_BINLOG, ON_CHECK(0), ON_UPDATE(update_slave_max_statement_time)); +#endif + + +static Sys_var_on_access_global<Sys_var_ulong, + PRIV_SET_SYSTEM_GLOBAL_VAR_BINLOG_COMMIT_WAIT_COUNT> +Sys_binlog_commit_wait_count( + "binlog_commit_wait_count", + "If non-zero, binlog write will wait at most binlog_commit_wait_usec " + "microseconds for at least this many commits to queue up for group " + "commit to the binlog. This can reduce I/O on the binlog and provide " + "increased opportunity for parallel apply on the slave, but too high " + "a value will decrease commit throughput.", + GLOBAL_VAR(opt_binlog_commit_wait_count), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(0, ULONG_MAX), DEFAULT(0), BLOCK_SIZE(1)); + + +static Sys_var_on_access_global<Sys_var_ulong, + PRIV_SET_SYSTEM_GLOBAL_VAR_BINLOG_COMMIT_WAIT_USEC> +Sys_binlog_commit_wait_usec( + "binlog_commit_wait_usec", + "Maximum time, in microseconds, to wait for more commits to queue up " + "for binlog group commit. Only takes effect if the value of " + "binlog_commit_wait_count is non-zero.", + GLOBAL_VAR(opt_binlog_commit_wait_usec), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(0, ULONG_MAX), DEFAULT(100000), BLOCK_SIZE(1)); + + +static bool fix_max_join_size(sys_var *self, THD *thd, enum_var_type type) +{ + SV *sv= type == OPT_GLOBAL ? &global_system_variables : &thd->variables; + if (sv->max_join_size == HA_POS_ERROR) + sv->option_bits|= OPTION_BIG_SELECTS; + else + sv->option_bits&= ~OPTION_BIG_SELECTS; + return false; +} +static Sys_var_harows Sys_max_join_size( + "max_join_size", + "Joins that are probably going to read more than max_join_size " + "records return an error", + SESSION_VAR(max_join_size), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(1, HA_POS_ERROR), DEFAULT(HA_POS_ERROR), BLOCK_SIZE(1), + NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(0), + ON_UPDATE(fix_max_join_size)); + +static Sys_var_ulong Sys_max_seeks_for_key( + "max_seeks_for_key", + "Limit assumed max number of seeks when looking up rows based on a key", + SESSION_VAR(max_seeks_for_key), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(1, UINT_MAX), DEFAULT(UINT_MAX), BLOCK_SIZE(1)); + +static Sys_var_ulong Sys_max_length_for_sort_data( + "max_length_for_sort_data", + "Max number of bytes in sorted records", + SESSION_VAR(max_length_for_sort_data), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(4, 8192*1024L), DEFAULT(1024), BLOCK_SIZE(1)); + +static PolyLock_mutex PLock_prepared_stmt_count(&LOCK_prepared_stmt_count); +static Sys_var_uint Sys_max_prepared_stmt_count( + "max_prepared_stmt_count", + "Maximum number of prepared statements in the server", + GLOBAL_VAR(max_prepared_stmt_count), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(0, UINT_MAX32), DEFAULT(16382), BLOCK_SIZE(1), + &PLock_prepared_stmt_count); + +static Sys_var_ulong Sys_max_recursive_iterations( + "max_recursive_iterations", + "Maximum number of iterations when executing recursive queries", + SESSION_VAR(max_recursive_iterations), CMD_LINE(OPT_ARG), + VALID_RANGE(0, UINT_MAX), DEFAULT(1000), BLOCK_SIZE(1)); + +static Sys_var_ulong Sys_max_sort_length( + "max_sort_length", + "The number of bytes to use when sorting BLOB or TEXT values (only " + "the first max_sort_length bytes of each value are used; the rest " + "are ignored)", + SESSION_VAR(max_sort_length), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(64, 8192*1024L), DEFAULT(1024), BLOCK_SIZE(1)); + +static Sys_var_ulong Sys_max_sp_recursion_depth( + "max_sp_recursion_depth", + "Maximum stored procedure recursion depth", + SESSION_VAR(max_sp_recursion_depth), CMD_LINE(OPT_ARG), + VALID_RANGE(0, 255), DEFAULT(0), BLOCK_SIZE(1)); + + +static bool if_checking_enabled(sys_var *self, THD *thd, set_var *var) +{ + if (session_readonly(self, thd, var)) + return true; + + if (!max_user_connections_checking) + { + my_error(ER_OPTION_PREVENTS_STATEMENT, MYF(0), "--max-user-connections=0"); + return true; + } + + return false; +} +// non-standard session_value_ptr() here +static Sys_var_max_user_conn Sys_max_user_connections( + "max_user_connections", + "The maximum number of active connections for a single user " + "(0 = no limit)", + SESSION_VAR(max_user_connections), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(-1, INT_MAX), DEFAULT(0), BLOCK_SIZE(1), NO_MUTEX_GUARD, + NOT_IN_BINLOG, ON_CHECK(if_checking_enabled)); + +static Sys_var_ulong Sys_max_tmp_tables( + "max_tmp_tables", "Unused, will be removed.", + SESSION_VAR(max_tmp_tables), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(1, UINT_MAX), DEFAULT(32), BLOCK_SIZE(1), + NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(0), ON_UPDATE(0), + DEPRECATED("")); // since 10.1.2 + +static Sys_var_ulong Sys_max_write_lock_count( + "max_write_lock_count", + "After this many write locks, allow some read locks to run in between", + GLOBAL_VAR(max_write_lock_count), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(1, UINT_MAX), DEFAULT(UINT_MAX), BLOCK_SIZE(1)); + +static Sys_var_ulong Sys_min_examined_row_limit( + "min_examined_row_limit", + "Alias for log_slow_min_examined_row_limit. " + "Don't write queries to slow log that examine fewer rows " + "than that", + SESSION_VAR(min_examined_row_limit), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(0, UINT_MAX), DEFAULT(0), BLOCK_SIZE(1)); + +static Sys_var_ulong Sys_log_slow_min_examined_row_limit( + "log_slow_min_examined_row_limit", + "Don't write queries to slow log that examine fewer rows " + "than that", + SESSION_VAR(min_examined_row_limit), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(0, UINT_MAX), DEFAULT(0), BLOCK_SIZE(1)); + +#ifdef _WIN32 +static Sys_var_mybool Sys_named_pipe( + "named_pipe", "Enable the named pipe (NT)", + READ_ONLY GLOBAL_VAR(opt_enable_named_pipe), CMD_LINE(OPT_ARG), + DEFAULT(FALSE)); +#endif + + +static bool check_net_buffer_length(sys_var *self, THD *thd, set_var *var) +{ + longlong val; + if (session_readonly(self, thd, var)) + return true; + + val= var->save_result.ulonglong_value; + if (val > (longlong) global_system_variables.max_allowed_packet) + { + push_warning_printf(thd, Sql_condition::WARN_LEVEL_WARN, + WARN_OPTION_BELOW_LIMIT, + ER_THD(thd, WARN_OPTION_BELOW_LIMIT), + "max_allowed_packet", "net_buffer_length"); + } + return false; +} +static Sys_var_ulong Sys_net_buffer_length( + "net_buffer_length", + "Buffer length for TCP/IP and socket communication", + SESSION_VAR(net_buffer_length), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(1024, 1024*1024), DEFAULT(16384), BLOCK_SIZE(1024), + NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_net_buffer_length)); + +static bool fix_net_read_timeout(sys_var *self, THD *thd, enum_var_type type) +{ + if (type != OPT_GLOBAL) + my_net_set_read_timeout(&thd->net, thd->variables.net_read_timeout); + return false; +} +static Sys_var_ulong Sys_net_read_timeout( + "net_read_timeout", + "Number of seconds to wait for more data from a connection before " + "aborting the read", + SESSION_VAR(net_read_timeout), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(1, LONG_TIMEOUT), DEFAULT(NET_READ_TIMEOUT), BLOCK_SIZE(1), + NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(0), + ON_UPDATE(fix_net_read_timeout)); + +static bool fix_net_write_timeout(sys_var *self, THD *thd, enum_var_type type) +{ + if (type != OPT_GLOBAL) + my_net_set_write_timeout(&thd->net, thd->variables.net_write_timeout); + return false; +} +static Sys_var_ulong Sys_net_write_timeout( + "net_write_timeout", + "Number of seconds to wait for a block to be written to a connection " + "before aborting the write", + SESSION_VAR(net_write_timeout), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(1, LONG_TIMEOUT), DEFAULT(NET_WRITE_TIMEOUT), BLOCK_SIZE(1), + NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(0), + ON_UPDATE(fix_net_write_timeout)); + +static bool fix_net_retry_count(sys_var *self, THD *thd, enum_var_type type) +{ + if (type != OPT_GLOBAL) + thd->net.retry_count=thd->variables.net_retry_count; + return false; +} +static Sys_var_ulong Sys_net_retry_count( + "net_retry_count", + "If a read on a communication port is interrupted, retry this " + "many times before giving up", + SESSION_VAR(net_retry_count), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(1, UINT_MAX), DEFAULT(MYSQLD_NET_RETRY_COUNT), + BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(0), + ON_UPDATE(fix_net_retry_count)); + +static bool set_old_mode (sys_var *self, THD *thd, enum_var_type type) +{ + if (thd->variables.old_mode) + { + thd->variables.old_behavior|= (OLD_MODE_NO_PROGRESS_INFO | + OLD_MODE_IGNORE_INDEX_ONLY_FOR_JOIN | + OLD_MODE_COMPAT_5_1_CHECKSUM); + } + else + { + thd->variables.old_behavior&= ~(OLD_MODE_NO_PROGRESS_INFO| + OLD_MODE_IGNORE_INDEX_ONLY_FOR_JOIN | + OLD_MODE_COMPAT_5_1_CHECKSUM); + } + + return false; +} + +static Sys_var_mybool Sys_old_mode( + "old", "Use compatible behavior from previous MariaDB version. See also --old-mode", + SESSION_VAR(old_mode), CMD_LINE(OPT_ARG), DEFAULT(FALSE), 0, NOT_IN_BINLOG, ON_CHECK(0), + ON_UPDATE(set_old_mode), DEPRECATED("'@@old_mode'")); + +static Sys_var_mybool Sys_opt_allow_suspicious_udfs( + "allow_suspicious_udfs", + "Allows use of user-defined functions (UDFs) consisting of only one symbol xxx() without corresponding xxx_init() or xxx_deinit(). That also means that one can load any function from any library, for example exit() from libc.so", + READ_ONLY GLOBAL_VAR(opt_allow_suspicious_udfs), + CMD_LINE(OPT_ARG), DEFAULT(FALSE)); + +#ifndef DISABLE_GRANT_OPTIONS +static Sys_var_mybool Sys_skip_grant_tables( + "skip_grant_tables", + "Start without grant tables. This gives all users FULL ACCESS to all tables.", + READ_ONLY GLOBAL_VAR(opt_noacl), + CMD_LINE(OPT_ARG), DEFAULT(FALSE)); +#endif + +static const char *alter_algorithm_modes[]= {"DEFAULT", "COPY", "INPLACE", +"NOCOPY", "INSTANT", NULL}; + +static Sys_var_enum Sys_alter_algorithm( + "alter_algorithm", "Specify the alter table algorithm", + SESSION_VAR(alter_algorithm), CMD_LINE(OPT_ARG), + alter_algorithm_modes, DEFAULT(0)); + +static Sys_var_enum Sys_old_alter_table( + "old_alter_table", "Alias for alter_algorithm. " + "Deprecated. Use --alter-algorithm instead.", + SESSION_VAR(alter_algorithm), CMD_LINE(OPT_ARG), + alter_algorithm_modes, DEFAULT(0), NO_MUTEX_GUARD, NOT_IN_BINLOG, + ON_CHECK(0), ON_UPDATE(0), + DEPRECATED("'@@alter_algorithm'")); // Since 10.5.1 + +static bool check_old_passwords(sys_var *self, THD *thd, set_var *var) +{ + return mysql_user_table_is_in_short_password_format; +} +static Sys_var_mybool Sys_old_passwords( + "old_passwords", + "Use old password encryption method (needed for 4.0 and older clients)", + SESSION_VAR(old_passwords), CMD_LINE(OPT_ARG), + DEFAULT(FALSE), NO_MUTEX_GUARD, NOT_IN_BINLOG, + ON_CHECK(check_old_passwords)); +export sys_var *Sys_old_passwords_ptr= &Sys_old_passwords; // for sql_acl.cc + +static Sys_var_ulong Sys_open_files_limit( + "open_files_limit", + "If this is not 0, then mysqld will use this value to reserve file " + "descriptors to use with setrlimit(). If this value is 0 or autoset " + "then mysqld will reserve max_connections*5 or max_connections + " + "table_cache*2 (whichever is larger) number of file descriptors", + AUTO_SET READ_ONLY GLOBAL_VAR(open_files_limit), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(0, OS_FILE_LIMIT), DEFAULT(0), BLOCK_SIZE(1)); + +/// @todo change to enum +static Sys_var_ulong Sys_optimizer_prune_level( + "optimizer_prune_level", + "Controls the heuristic(s) applied during query optimization to prune " + "less-promising partial plans from the optimizer search space. " + "Meaning: 0 - do not apply any heuristic, thus perform exhaustive " + "search: 1 - prune plans based on cost and number of retrieved rows " + "eq_ref: 2 - prune also if we find an eq_ref chain", + SESSION_VAR(optimizer_prune_level), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(0, 2), DEFAULT(2), BLOCK_SIZE(1)); + +static Sys_var_ulong Sys_optimizer_selectivity_sampling_limit( + "optimizer_selectivity_sampling_limit", + "Controls number of record samples to check condition selectivity", + SESSION_VAR(optimizer_selectivity_sampling_limit), + CMD_LINE(REQUIRED_ARG), + VALID_RANGE(SELECTIVITY_SAMPLING_THRESHOLD, UINT_MAX), + DEFAULT(SELECTIVITY_SAMPLING_LIMIT), BLOCK_SIZE(1)); + +static Sys_var_ulong Sys_optimizer_use_condition_selectivity( + "optimizer_use_condition_selectivity", + "Controls selectivity of which conditions the optimizer takes into " + "account to calculate cardinality of a partial join when it searches " + "for the best execution plan " + "Meaning: " + "1 - use selectivity of index backed range conditions to calculate " + "the cardinality of a partial join if the last joined table is " + "accessed by full table scan or an index scan, " + "2 - use selectivity of index backed range conditions to calculate " + "the cardinality of a partial join in any case, " + "3 - additionally always use selectivity of range conditions that are " + "not backed by any index to calculate the cardinality of a partial join, " + "4 - use histograms to calculate selectivity of range conditions that " + "are not backed by any index to calculate the cardinality of " + "a partial join." + "5 - additionally use selectivity of certain non-range predicates " + "calculated on record samples", + SESSION_VAR(optimizer_use_condition_selectivity), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(1, 5), DEFAULT(4), BLOCK_SIZE(1)); + +static Sys_var_ulong Sys_optimizer_search_depth( + "optimizer_search_depth", + "Maximum depth of search performed by the query optimizer. Values " + "larger than the number of relations in a query result in better " + "query plans, but take longer to compile a query. Values smaller " + "than the number of tables in a relation result in faster " + "optimization, but may produce very bad query plans. If set to 0, " + "the system will automatically pick a reasonable value.", + SESSION_VAR(optimizer_search_depth), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(0, MAX_TABLES+1), DEFAULT(MAX_TABLES+1), BLOCK_SIZE(1)); + +static Sys_var_ulong Sys_optimizer_extra_pruning_depth( + "optimizer_extra_pruning_depth", + "If the optimizer needs to enumerate join prefix of this size or " + "larger, then it will try aggressively prune away the search space.", + SESSION_VAR(optimizer_extra_pruning_depth), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(0, MAX_TABLES+1), DEFAULT(8), BLOCK_SIZE(1)); + +/* this is used in the sigsegv handler */ +export const char *optimizer_switch_names[]= +{ + "index_merge","index_merge_union","index_merge_sort_union", + "index_merge_intersection","index_merge_sort_intersection", + "engine_condition_pushdown", + "index_condition_pushdown", + "derived_merge", "derived_with_keys", + "firstmatch","loosescan","materialization","in_to_exists","semijoin", + "partial_match_rowid_merge", + "partial_match_table_scan", + "subquery_cache", + "mrr", + "mrr_cost_based", + "mrr_sort_keys", + "outer_join_with_cache", + "semijoin_with_cache", + "join_cache_incremental", + "join_cache_hashed", + "join_cache_bka", + "optimize_join_buffer_size", + "table_elimination", + "extended_keys", + "exists_to_in", + "orderby_uses_equalities", + "condition_pushdown_for_derived", + "split_materialized", + "condition_pushdown_for_subquery", + "rowid_filter", + "condition_pushdown_from_having", + "not_null_range_scan", + "hash_join_cardinality", + "cset_narrowing", + "default", + NullS +}; +static bool fix_optimizer_switch(sys_var *self, THD *thd, + enum_var_type type) +{ + SV *sv= (type == OPT_GLOBAL) ? &global_system_variables : &thd->variables; + if (sv->optimizer_switch & deprecated_ENGINE_CONDITION_PUSHDOWN) + push_warning_printf(current_thd, Sql_condition::WARN_LEVEL_WARN, + ER_WARN_DEPRECATED_SYNTAX_NO_REPLACEMENT, + ER_THD(thd, ER_WARN_DEPRECATED_SYNTAX_NO_REPLACEMENT), + "engine_condition_pushdown=on"); // since 10.1.1 + return false; +} +static bool check_legal_optimizer_switch(sys_var *self, THD *thd, + set_var *var) +{ + if (var->save_result.ulonglong_value & (OPTIMIZER_SWITCH_MATERIALIZATION | + OPTIMIZER_SWITCH_IN_TO_EXISTS)) + { + return false; + } + my_error(ER_ILLEGAL_SUBQUERY_OPTIMIZER_SWITCHES, MYF(0)); + return true; +} +static Sys_var_flagset Sys_optimizer_switch( + "optimizer_switch", + "Fine-tune the optimizer behavior", + SESSION_VAR(optimizer_switch), CMD_LINE(REQUIRED_ARG), + optimizer_switch_names, DEFAULT(OPTIMIZER_SWITCH_DEFAULT), + NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_legal_optimizer_switch), + ON_UPDATE(fix_optimizer_switch)); + +static Sys_var_flagset Sys_optimizer_trace( + "optimizer_trace", + "Controls tracing of the Optimizer:" + " optimizer_trace=option=val[,option=val...], where option is one of" + " {enabled}" + " and val is one of {on, off, default}", + SESSION_VAR(optimizer_trace), CMD_LINE(REQUIRED_ARG), + Opt_trace_context::flag_names, DEFAULT(Opt_trace_context::FLAG_DEFAULT)); + // @see set_var::is_var_optimizer_trace() +export sys_var *Sys_optimizer_trace_ptr = &Sys_optimizer_trace; + +static Sys_var_ulong Sys_optimizer_trace_max_mem_size( + "optimizer_trace_max_mem_size", + "Maximum allowed size of an optimizer trace", + SESSION_VAR(optimizer_trace_max_mem_size), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(0, ULONG_MAX), DEFAULT(1024 * 1024), BLOCK_SIZE(1)); + +static Sys_var_charptr_fscs Sys_pid_file( + "pid_file", "Pid file used by safe_mysqld", + READ_ONLY GLOBAL_VAR(pidfile_name_ptr), CMD_LINE(REQUIRED_ARG), + DEFAULT(0)); + +static Sys_var_charptr_fscs Sys_plugin_dir( + "plugin_dir", "Directory for plugins", + READ_ONLY GLOBAL_VAR(opt_plugin_dir_ptr), CMD_LINE(REQUIRED_ARG), + DEFAULT(0)); + +static Sys_var_uint Sys_port( + "port", + "Port number to use for connection or 0 to default to, " + "my.cnf, $MYSQL_TCP_PORT, " +#if MYSQL_PORT_DEFAULT == 0 + "/etc/services, " +#endif + "built-in default (" STRINGIFY_ARG(MYSQL_PORT) "), whatever comes first", + READ_ONLY GLOBAL_VAR(mysqld_port), CMD_LINE(REQUIRED_ARG, 'P'), + VALID_RANGE(0, UINT_MAX32), DEFAULT(0), BLOCK_SIZE(1)); + +static Sys_var_ulong Sys_preload_buff_size( + "preload_buffer_size", + "The size of the buffer that is allocated when preloading indexes", + SESSION_VAR(preload_buff_size), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(1024, 1024*1024*1024), DEFAULT(32768), BLOCK_SIZE(1)); + +static Sys_var_uint Sys_protocol_version( + "protocol_version", + "The version of the client/server protocol used by the MariaDB server", + READ_ONLY GLOBAL_VAR(protocol_version), CMD_LINE_HELP_ONLY, + VALID_RANGE(0, ~0U), DEFAULT(PROTOCOL_VERSION), BLOCK_SIZE(1)); + +static Sys_var_proxy_user Sys_proxy_user( + "proxy_user", "The proxy user account name used when logging in"); + +static Sys_var_external_user Sys_exterenal_user( + "external_user", "The external user account used when logging in"); + +static Sys_var_ulong Sys_read_buff_size( + "read_buffer_size", + "Each thread that does a sequential scan allocates a buffer of " + "this size for each table it scans. If you do many sequential scans, " + "you may want to increase this value", + SESSION_VAR(read_buff_size), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(IO_SIZE*2, INT_MAX32), DEFAULT(128*1024), + BLOCK_SIZE(IO_SIZE)); + +static bool check_read_only(sys_var *self, THD *thd, set_var *var) +{ + /* Prevent self dead-lock */ + if (thd->locked_tables_mode || thd->in_active_multi_stmt_transaction() || + thd->current_backup_stage != BACKUP_FINISHED) + { + my_error(ER_LOCK_OR_ACTIVE_TRANSACTION, MYF(0)); + return true; + } + return false; +} + +static bool fix_read_only(sys_var *self, THD *thd, enum_var_type type) +{ + bool result= true; + my_bool new_read_only= read_only; // make a copy before releasing a mutex + DBUG_ENTER("sys_var_opt_readonly::update"); + + if (read_only == FALSE || read_only == opt_readonly) + { + opt_readonly= read_only; + DBUG_RETURN(false); + } + + if (check_read_only(self, thd, 0)) // just in case + goto end; + + if (thd->global_read_lock.is_acquired()) + { + /* + This connection already holds the global read lock. + This can be the case with: + - FLUSH TABLES WITH READ LOCK + - SET GLOBAL READ_ONLY = 1 + */ + opt_readonly= read_only; + DBUG_RETURN(false); + } + + /* + READ_ONLY=1 prevents write locks from being taken on tables and + blocks transactions from committing. We therefore should make sure + that no such events occur while setting the read_only variable. + This is a 2 step process: + [1] lock_global_read_lock() + Prevents connections from obtaining new write locks on + tables. Note that we can still have active rw transactions. + [2] make_global_read_lock_block_commit() + Prevents transactions from committing. + */ + + read_only= opt_readonly; + mysql_mutex_unlock(&LOCK_global_system_variables); + + if (thd->global_read_lock.lock_global_read_lock(thd)) + goto end_with_mutex_unlock; + + if ((result= thd->global_read_lock.make_global_read_lock_block_commit(thd))) + goto end_with_read_lock; + + /* Change the opt_readonly system variable, safe because the lock is held */ + opt_readonly= new_read_only; + result= false; + + end_with_read_lock: + /* Release the lock */ + thd->global_read_lock.unlock_global_read_lock(thd); + end_with_mutex_unlock: + mysql_mutex_lock(&LOCK_global_system_variables); + end: + read_only= opt_readonly; + DBUG_RETURN(result); +} + + +/** + The read_only boolean is always equal to the opt_readonly boolean except + during fix_read_only(); when that function is entered, opt_readonly is + the pre-update value and read_only is the post-update value. + fix_read_only() compares them and runs needed operations for the + transition (especially when transitioning from false to true) and + synchronizes both booleans in the end. +*/ +static Sys_var_on_access_global<Sys_var_mybool, + PRIV_SET_SYSTEM_GLOBAL_VAR_READ_ONLY> +Sys_readonly( + "read_only", + "Make all non-temporary tables read-only, with the exception for " + "replication (slave) threads and users with the 'READ ONLY ADMIN' " + "privilege", + GLOBAL_VAR(read_only), CMD_LINE(OPT_ARG), DEFAULT(FALSE), + NO_MUTEX_GUARD, NOT_IN_BINLOG, + ON_CHECK(check_read_only), ON_UPDATE(fix_read_only)); + +// Small lower limit to be able to test MRR +static Sys_var_ulong Sys_read_rnd_buff_size( + "read_rnd_buffer_size", + "When reading rows in sorted order after a sort, the rows are read " + "through this buffer to avoid a disk seeks", + SESSION_VAR(read_rnd_buff_size), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(1, INT_MAX32), DEFAULT(256*1024), BLOCK_SIZE(1)); + +static Sys_var_ulong Sys_div_precincrement( + "div_precision_increment", "Precision of the result of '/' " + "operator will be increased on that value", + SESSION_VAR(div_precincrement), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(0, DECIMAL_MAX_SCALE), DEFAULT(4), BLOCK_SIZE(1)); + +static Sys_var_uint Sys_eq_range_index_dive_limit( + "eq_range_index_dive_limit", + "The optimizer will use existing index statistics instead of " + "doing index dives for equality ranges if the number of equality " + "ranges for the index is larger than or equal to this number. " + "If set to 0, index dives are always used.", + SESSION_VAR(eq_range_index_dive_limit), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(0, UINT_MAX32), DEFAULT(200), + BLOCK_SIZE(1)); + +static Sys_var_ulong Sys_range_alloc_block_size( + "range_alloc_block_size", + "Allocation block size for storing ranges during optimization", + SESSION_VAR(range_alloc_block_size), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(RANGE_ALLOC_BLOCK_SIZE, UINT_MAX), + DEFAULT(RANGE_ALLOC_BLOCK_SIZE), BLOCK_SIZE(1024)); + +static bool fix_thd_mem_root(sys_var *self, THD *thd, enum_var_type type) +{ + if (type != OPT_GLOBAL) + reset_root_defaults(thd->mem_root, + thd->variables.query_alloc_block_size, + thd->variables.query_prealloc_size); + return false; +} +static Sys_var_ulong Sys_query_alloc_block_size( + "query_alloc_block_size", + "Allocation block size for query parsing and execution", + SESSION_VAR(query_alloc_block_size), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(1024, UINT_MAX), DEFAULT(QUERY_ALLOC_BLOCK_SIZE), + BLOCK_SIZE(1024), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(0), + ON_UPDATE(fix_thd_mem_root)); + +static Sys_var_ulong Sys_query_prealloc_size( + "query_prealloc_size", + "Persistent buffer for query parsing and execution", + SESSION_VAR(query_prealloc_size), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(1024, UINT_MAX), + DEFAULT(QUERY_ALLOC_PREALLOC_SIZE), + BLOCK_SIZE(1024), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(0), + ON_UPDATE(fix_thd_mem_root)); + + +// this has to be NO_CMD_LINE as the command-line option has a different name +static Sys_var_mybool Sys_skip_external_locking( + "skip_external_locking", "Don't use system (external) locking", + READ_ONLY GLOBAL_VAR(my_disable_locking), NO_CMD_LINE, DEFAULT(TRUE)); + +static Sys_var_mybool Sys_skip_networking( + "skip_networking", "Don't allow connection with TCP/IP", + READ_ONLY GLOBAL_VAR(opt_disable_networking), CMD_LINE(OPT_ARG), + DEFAULT(FALSE)); + +static Sys_var_mybool Sys_skip_name_resolve( + "skip_name_resolve", + "Don't resolve hostnames. All hostnames are IP's or 'localhost'.", + READ_ONLY GLOBAL_VAR(opt_skip_name_resolve), + CMD_LINE(OPT_ARG), + DEFAULT(FALSE)); + +static Sys_var_mybool Sys_skip_show_database( + "skip_show_database", "Don't allow 'SHOW DATABASE' commands", + READ_ONLY GLOBAL_VAR(opt_skip_show_db), CMD_LINE(OPT_ARG), + DEFAULT(FALSE)); + +static Sys_var_charptr_fscs Sys_socket( + "socket", "Socket file to use for connection", + READ_ONLY GLOBAL_VAR(mysqld_unix_port), CMD_LINE(REQUIRED_ARG), + DEFAULT(0)); + +static Sys_var_ulonglong Sys_thread_stack( + "thread_stack", "The stack size for each thread", + READ_ONLY GLOBAL_VAR(my_thread_stack_size), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(128*1024, ULONGLONG_MAX), DEFAULT(DEFAULT_THREAD_STACK), + BLOCK_SIZE(1024)); + +static Sys_var_charptr_fscs Sys_tmpdir( + "tmpdir", "Path for temporary files. Several paths may " + "be specified, separated by a " +#if defined(_WIN32) + "semicolon (;)" +#else + "colon (:)" +#endif + ", in this case they are used in a round-robin fashion", + READ_ONLY GLOBAL_VAR(opt_mysql_tmpdir), CMD_LINE(REQUIRED_ARG, 't'), + DEFAULT(0)); + +static bool fix_trans_mem_root(sys_var *self, THD *thd, enum_var_type type) +{ + if (type != OPT_GLOBAL) + reset_root_defaults(&thd->transaction->mem_root, + thd->variables.trans_alloc_block_size, + thd->variables.trans_prealloc_size); + return false; +} +static Sys_var_ulong Sys_trans_alloc_block_size( + "transaction_alloc_block_size", + "Allocation block size for transactions to be stored in binary log", + SESSION_VAR(trans_alloc_block_size), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(1024, 128 * 1024 * 1024), DEFAULT(TRANS_ALLOC_BLOCK_SIZE), + BLOCK_SIZE(1024), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(0), + ON_UPDATE(fix_trans_mem_root)); + +static Sys_var_ulong Sys_trans_prealloc_size( + "transaction_prealloc_size", + "Persistent buffer for transactions to be stored in binary log", + SESSION_VAR(trans_prealloc_size), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(1024, 128 * 1024 * 1024), DEFAULT(TRANS_ALLOC_PREALLOC_SIZE), + BLOCK_SIZE(1024), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(0), + ON_UPDATE(fix_trans_mem_root)); + +static const char *thread_handling_names[]= +{ + "one-thread-per-connection", "no-threads", +#ifdef HAVE_POOL_OF_THREADS + "pool-of-threads", +#endif + 0 +}; + +#if defined (_WIN32) && defined (HAVE_POOL_OF_THREADS) +/* Windows is using OS threadpool, so we're pretty sure it works well */ +#define DEFAULT_THREAD_HANDLING 2 +#else +#define DEFAULT_THREAD_HANDLING 0 +#endif + +static Sys_var_enum Sys_thread_handling( + "thread_handling", + "Define threads usage for handling queries", + READ_ONLY GLOBAL_VAR(thread_handling), CMD_LINE(REQUIRED_ARG), + thread_handling_names, + DEFAULT(DEFAULT_THREAD_HANDLING) + ); + +#ifdef HAVE_QUERY_CACHE +static bool fix_query_cache_size(sys_var *self, THD *thd, enum_var_type type) +{ + size_t new_cache_size= query_cache.resize((size_t)query_cache_size); + /* + Note: query_cache_size is a global variable reflecting the + requested cache size. See also query_cache_size_arg + */ + if (query_cache_size != new_cache_size) + push_warning_printf(current_thd, Sql_condition::WARN_LEVEL_WARN, + ER_WARN_QC_RESIZE, ER_THD(thd, ER_WARN_QC_RESIZE), + query_cache_size, (ulong)new_cache_size); + + query_cache_size= new_cache_size; + + return false; +} + +static bool fix_query_cache_limit(sys_var *self, THD *thd, enum_var_type type) +{ + query_cache.result_size_limit(query_cache_limit); + return false; +} +static Sys_var_ulonglong Sys_query_cache_size( + "query_cache_size", + "The memory allocated to store results from old queries", + GLOBAL_VAR(query_cache_size), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(0, ULONG_MAX), DEFAULT(1024*1024), BLOCK_SIZE(1024), + NO_MUTEX_GUARD, NOT_IN_BINLOG, NULL, + ON_UPDATE(fix_query_cache_size)); + +static Sys_var_ulong Sys_query_cache_limit( + "query_cache_limit", + "Don't cache results that are bigger than this", + GLOBAL_VAR(query_cache_limit), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(0, UINT_MAX), DEFAULT(1024*1024), BLOCK_SIZE(1), + NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(0), + ON_UPDATE(fix_query_cache_limit)); + +static bool fix_qcache_min_res_unit(sys_var *self, THD *thd, enum_var_type type) +{ + query_cache_min_res_unit= + (ulong)query_cache.set_min_res_unit(query_cache_min_res_unit); + return false; +} +static Sys_var_ulong Sys_query_cache_min_res_unit( + "query_cache_min_res_unit", + "The minimum size for blocks allocated by the query cache", + GLOBAL_VAR(query_cache_min_res_unit), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(0, UINT_MAX), DEFAULT(QUERY_CACHE_MIN_RESULT_DATA_SIZE), + BLOCK_SIZE(8), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(0), + ON_UPDATE(fix_qcache_min_res_unit)); + +static const char *query_cache_type_names[]= { "OFF", "ON", "DEMAND", 0 }; + +static bool check_query_cache_type(sys_var *self, THD *thd, set_var *var) +{ + if (query_cache.is_disable_in_progress()) + { + my_error(ER_QUERY_CACHE_IS_DISABLED, MYF(0)); + return true; + } + + if (var->type != OPT_GLOBAL && global_system_variables.query_cache_type == 0) + { + if (var->value) + { + if (var->save_result.ulonglong_value != 0) + { + my_error(ER_QUERY_CACHE_IS_GLOBALY_DISABLED, MYF(0)); + return true; + } + } + } + return false; +} + + +static bool fix_query_cache_type(sys_var *self, THD *thd, enum_var_type type) +{ + if (type != OPT_GLOBAL) + return false; + + if (global_system_variables.query_cache_type != 0 && + query_cache.is_disabled()) + { + /* if disabling in progress variable will not be set */ + DBUG_ASSERT(!query_cache.is_disable_in_progress()); + /* Enable query cache because it was disabled */ + fix_query_cache_size(0, thd, type); + } + else if (global_system_variables.query_cache_type == 0) + query_cache.disable_query_cache(thd); + return false; +} +static Sys_var_enum Sys_query_cache_type( + "query_cache_type", + "OFF = Don't cache or retrieve results. ON = Cache all results " + "except SELECT SQL_NO_CACHE ... queries. DEMAND = Cache only " + "SELECT SQL_CACHE ... queries", + NO_SET_STMT SESSION_VAR(query_cache_type), CMD_LINE(REQUIRED_ARG), + query_cache_type_names, DEFAULT(0), NO_MUTEX_GUARD, NOT_IN_BINLOG, + ON_CHECK(check_query_cache_type), + ON_UPDATE(fix_query_cache_type)); + +static Sys_var_mybool Sys_query_cache_wlock_invalidate( + "query_cache_wlock_invalidate", + "Invalidate queries in query cache on LOCK for write", + SESSION_VAR(query_cache_wlock_invalidate), CMD_LINE(OPT_ARG), + DEFAULT(FALSE)); +#endif /* HAVE_QUERY_CACHE */ + +static Sys_var_on_access_global<Sys_var_mybool, + PRIV_SET_SYSTEM_GLOBAL_VAR_SECURE_AUTH> +Sys_secure_auth( + "secure_auth", + "Disallow authentication for accounts that have old (pre-4.1) " + "passwords", + GLOBAL_VAR(opt_secure_auth), CMD_LINE(OPT_ARG), + DEFAULT(TRUE)); + +static bool check_require_secure_transport(sys_var *self, THD *thd, set_var *var) +{ +#ifndef _WIN32 + /* + Always allow require_secure_transport to be enabled on + Linux, because it always has Unix domain sockets that are secure: + */ + return false; +#else + /* + Check SSL is enabled before turning require_secure_transport ON, + otherwise no connections will be allowed on Windows: + */ + if (!var->save_result.ulonglong_value) + return false; + if (opt_use_ssl || opt_enable_named_pipe) + return false; + /* reject if SSL is disabled: */ + my_error(ER_NO_SECURE_TRANSPORTS_CONFIGURED, MYF(0)); + return true; +#endif +} + +static Sys_var_mybool Sys_require_secure_transport( + "require_secure_transport", + "When this option is enabled, connections attempted using insecure " + "transport will be rejected. Secure transports are SSL/TLS, " + "Unix sockets or named pipes.", + GLOBAL_VAR(opt_require_secure_transport), + CMD_LINE(OPT_ARG), + DEFAULT(FALSE), + NO_MUTEX_GUARD, NOT_IN_BINLOG, + ON_CHECK(check_require_secure_transport), ON_UPDATE(0)); + +static Sys_var_charptr_fscs Sys_secure_file_priv( + "secure_file_priv", + "Limit LOAD DATA, SELECT ... OUTFILE, and LOAD_FILE() to files " + "within specified directory", + PREALLOCATED READ_ONLY GLOBAL_VAR(opt_secure_file_priv), + CMD_LINE(REQUIRED_ARG, OPT_SEQURE_FILE_PRIV), DEFAULT(0)); + +static bool check_server_id(sys_var *self, THD *thd, set_var *var) +{ +#ifdef WITH_WSREP + if (WSREP_ON && WSREP_PROVIDER_EXISTS && !wsrep_new_cluster && wsrep_gtid_mode) + { + push_warning(thd, Sql_condition::WARN_LEVEL_WARN, + ER_WRONG_VALUE_FOR_VAR, + "Can't change server_id because wsrep and wsrep_gtid_mode is set." + " You can set server_id only with wsrep_new_cluster. "); + return true; + } +#endif /* WITH_WSREP */ + return false; +} + +static bool fix_server_id(sys_var *self, THD *thd, enum_var_type type) +{ + if (type == OPT_GLOBAL) + { + thd->variables.server_id= global_system_variables.server_id; + /* + Historically, server_id was a global variable that is exported to + plugins. Now it is a session variable, and lives in the + global_system_variables struct, but we still need to export the + value for reading to plugins for backwards compatibility reasons. + */ + ::server_id= global_system_variables.server_id; + } + return false; +} +static Sys_var_on_access<Sys_var_ulong, + PRIV_SET_SYSTEM_GLOBAL_VAR_SERVER_ID, + PRIV_SET_SYSTEM_SESSION_VAR_SERVER_ID> +Sys_server_id( + "server_id", + "Uniquely identifies the server instance in the community of " + "replication partners", + SESSION_VAR(server_id), CMD_LINE(REQUIRED_ARG, OPT_SERVER_ID), + VALID_RANGE(1, UINT_MAX32), DEFAULT(1), BLOCK_SIZE(1), NO_MUTEX_GUARD, + NOT_IN_BINLOG, ON_CHECK(check_server_id), ON_UPDATE(fix_server_id)); + +static Sys_var_on_access_global<Sys_var_mybool, + PRIV_SET_SYSTEM_GLOBAL_VAR_SLAVE_COMPRESSED_PROTOCOL> +Sys_slave_compressed_protocol( + "slave_compressed_protocol", + "Use compression on master/slave protocol", + GLOBAL_VAR(opt_slave_compressed_protocol), CMD_LINE(OPT_ARG), + DEFAULT(FALSE)); + +#ifdef HAVE_REPLICATION +static const char *slave_exec_mode_names[]= {"STRICT", "IDEMPOTENT", 0}; +static Sys_var_on_access_global<Sys_var_enum, + PRIV_SET_SYSTEM_GLOBAL_VAR_SLAVE_EXEC_MODE> +Slave_exec_mode( + "slave_exec_mode", + "How replication events should be executed. Legal values " + "are STRICT (default) and IDEMPOTENT. In IDEMPOTENT mode, " + "replication will not stop for operations that are idempotent. " + "For example, in row based replication attempts to delete rows that " + "doesn't exist will be ignored. " + "In STRICT mode, replication will stop on any unexpected difference " + "between the master and the slave.", + GLOBAL_VAR(slave_exec_mode_options), CMD_LINE(REQUIRED_ARG), + slave_exec_mode_names, DEFAULT(SLAVE_EXEC_MODE_STRICT)); + +static Sys_var_on_access_global<Sys_var_enum, + PRIV_SET_SYSTEM_GLOBAL_VAR_SLAVE_DDL_EXEC_MODE> +Slave_ddl_exec_mode( + "slave_ddl_exec_mode", + "How replication events should be executed. Legal values " + "are STRICT and IDEMPOTENT (default). In IDEMPOTENT mode, " + "replication will not stop for DDL operations that are idempotent. " + "This means that CREATE TABLE is treated as CREATE TABLE OR REPLACE and " + "DROP TABLE is treated as DROP TABLE IF EXISTS.", + GLOBAL_VAR(slave_ddl_exec_mode_options), CMD_LINE(REQUIRED_ARG), + slave_exec_mode_names, DEFAULT(SLAVE_EXEC_MODE_IDEMPOTENT)); + +static const char *slave_run_triggers_for_rbr_names[]= + {"NO", "YES", "LOGGING", "ENFORCE", 0}; +static Sys_var_on_access_global<Sys_var_enum, + PRIV_SET_SYSTEM_GLOBAL_VAR_SLAVE_RUN_TRIGGERS_FOR_RBR> +Slave_run_triggers_for_rbr( + "slave_run_triggers_for_rbr", + "Modes for how triggers in row-base replication on slave side will be " + "executed. Legal values are NO (default), YES, LOGGING and ENFORCE. NO means " + "that trigger for RBR will not be running on slave. YES and LOGGING " + "means that triggers will be running on slave, if there was not " + "triggers running on the master for the statement. LOGGING also means " + "results of that the executed triggers work will be written to " + "the binlog. ENFORCE means that triggers will always be run on the slave, " + "even if there are triggers on the master. ENFORCE implies LOGGING.", + GLOBAL_VAR(slave_run_triggers_for_rbr), CMD_LINE(REQUIRED_ARG), + slave_run_triggers_for_rbr_names, + DEFAULT(SLAVE_RUN_TRIGGERS_FOR_RBR_NO)); + +static const char *slave_type_conversions_name[]= {"ALL_LOSSY", "ALL_NON_LOSSY", 0}; +static Sys_var_on_access_global<Sys_var_set, + PRIV_SET_SYSTEM_GLOBAL_VAR_SLAVE_TYPE_CONVERSIONS> +Slave_type_conversions( + "slave_type_conversions", + "Set of slave type conversions that are enabled." + " If the variable is empty, no conversions are" + " allowed and it is expected that the types match exactly", + GLOBAL_VAR(slave_type_conversions_options), CMD_LINE(REQUIRED_ARG), + slave_type_conversions_name, + DEFAULT(0)); + +static Sys_var_on_access_global<Sys_var_mybool, + PRIV_SET_SYSTEM_GLOBAL_VAR_SLAVE_SQL_VERIFY_CHECKSUM> +Sys_slave_sql_verify_checksum( + "slave_sql_verify_checksum", + "Force checksum verification of replication events after reading them " + "from relay log. Note: Events are always checksum-verified by slave on " + "receiving them from the network before writing them to the relay log", + GLOBAL_VAR(opt_slave_sql_verify_checksum), CMD_LINE(OPT_ARG), + DEFAULT(TRUE)); + +static Sys_var_on_access_global<Sys_var_mybool, + PRIV_SET_SYSTEM_GLOBAL_VAR_MASTER_VERIFY_CHECKSUM> +Sys_master_verify_checksum( + "master_verify_checksum", + "Force checksum verification of logged events in the binary log before " + "sending them to slaves or printing them in the output of " + "SHOW BINLOG EVENTS", + GLOBAL_VAR(opt_master_verify_checksum), CMD_LINE(OPT_ARG), + DEFAULT(FALSE)); + +/* These names must match RPL_SKIP_XXX #defines in slave.h. */ +static const char *replicate_events_marked_for_skip_names[]= { + "REPLICATE", "FILTER_ON_SLAVE", "FILTER_ON_MASTER", 0 +}; + +bool +Sys_var_replicate_events_marked_for_skip::global_update(THD *thd, set_var *var) +{ + bool result= true; // Assume error + DBUG_ENTER("Sys_var_replicate_events_marked_for_skip::global_update"); + + mysql_mutex_unlock(&LOCK_global_system_variables); + if (!give_error_if_slave_running(0)) + result= Sys_var_enum::global_update(thd, var); + mysql_mutex_lock(&LOCK_global_system_variables); + DBUG_RETURN(result); +} + +static Sys_var_on_access_global<Sys_var_replicate_events_marked_for_skip, + PRIV_SET_SYSTEM_GLOBAL_VAR_REPLICATE_EVENTS_MARKED_FOR_SKIP> +Replicate_events_marked_for_skip + ("replicate_events_marked_for_skip", + "Whether the slave should replicate events that were created with " + "@@skip_replication=1 on the master. Default REPLICATE (no events are " + "skipped). Other values are FILTER_ON_SLAVE (events will be sent by the " + "master but ignored by the slave) and FILTER_ON_MASTER (events marked with " + "@@skip_replication=1 will be filtered on the master and never be sent to " + "the slave).", + GLOBAL_VAR(opt_replicate_events_marked_for_skip), CMD_LINE(REQUIRED_ARG), + replicate_events_marked_for_skip_names, DEFAULT(RPL_SKIP_REPLICATE)); + +/* new options for semisync */ + +static bool fix_rpl_semi_sync_master_enabled(sys_var *self, THD *thd, + enum_var_type type) +{ + mysql_mutex_unlock(&LOCK_global_system_variables); + mysql_mutex_lock(&repl_semisync_master.LOCK_rpl_semi_sync_master_enabled); + if (rpl_semi_sync_master_enabled) + { + if (repl_semisync_master.enable_master() != 0) + rpl_semi_sync_master_enabled= false; + else if (ack_receiver.start()) + { + repl_semisync_master.disable_master(); + rpl_semi_sync_master_enabled= false; + } + } + else + { + repl_semisync_master.disable_master(); + ack_receiver.stop(); + } + mysql_mutex_unlock(&repl_semisync_master.LOCK_rpl_semi_sync_master_enabled); + mysql_mutex_lock(&LOCK_global_system_variables); + return false; +} + +static bool fix_rpl_semi_sync_master_timeout(sys_var *self, THD *thd, + enum_var_type type) +{ + repl_semisync_master.set_wait_timeout(rpl_semi_sync_master_timeout); + return false; +} + +static bool fix_rpl_semi_sync_master_trace_level(sys_var *self, THD *thd, + enum_var_type type) +{ + repl_semisync_master.set_trace_level(rpl_semi_sync_master_trace_level); + ack_receiver.set_trace_level(rpl_semi_sync_master_trace_level); + return false; +} + +static bool fix_rpl_semi_sync_master_wait_point(sys_var *self, THD *thd, + enum_var_type type) +{ + repl_semisync_master.set_wait_point(rpl_semi_sync_master_wait_point); + return false; +} + +static bool fix_rpl_semi_sync_master_wait_no_slave(sys_var *self, THD *thd, + enum_var_type type) +{ + repl_semisync_master.check_and_switch(); + return false; +} + +static Sys_var_on_access_global<Sys_var_mybool, + PRIV_SET_SYSTEM_GLOBAL_VAR_RPL_SEMI_SYNC_MASTER_ENABLED> +Sys_semisync_master_enabled( + "rpl_semi_sync_master_enabled", + "Enable semi-synchronous replication master (disabled by default).", + GLOBAL_VAR(rpl_semi_sync_master_enabled), + CMD_LINE(OPT_ARG), DEFAULT(FALSE), + NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(0), + ON_UPDATE(fix_rpl_semi_sync_master_enabled)); + +static Sys_var_on_access_global<Sys_var_ulong, + PRIV_SET_SYSTEM_GLOBAL_VAR_RPL_SEMI_SYNC_MASTER_TIMEOUT> +Sys_semisync_master_timeout( + "rpl_semi_sync_master_timeout", + "The timeout value (in ms) for semi-synchronous replication in the " + "master", + GLOBAL_VAR(rpl_semi_sync_master_timeout), + CMD_LINE(REQUIRED_ARG), + VALID_RANGE(0,~0L),DEFAULT(10000),BLOCK_SIZE(1), + NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(0), + ON_UPDATE(fix_rpl_semi_sync_master_timeout)); + +static Sys_var_on_access_global<Sys_var_mybool, + PRIV_SET_SYSTEM_GLOBAL_VAR_RPL_SEMI_SYNC_MASTER_WAIT_NO_SLAVE> +Sys_semisync_master_wait_no_slave( + "rpl_semi_sync_master_wait_no_slave", + "Wait until timeout when no semi-synchronous replication slave " + "available (enabled by default).", + GLOBAL_VAR(rpl_semi_sync_master_wait_no_slave), + CMD_LINE(OPT_ARG), DEFAULT(TRUE), + NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(0), + ON_UPDATE(fix_rpl_semi_sync_master_wait_no_slave)); + +static Sys_var_on_access_global<Sys_var_ulong, + PRIV_SET_SYSTEM_GLOBAL_VAR_RPL_SEMI_SYNC_MASTER_TRACE_LEVEL> +Sys_semisync_master_trace_level( + "rpl_semi_sync_master_trace_level", + "The tracing level for semi-sync replication.", + GLOBAL_VAR(rpl_semi_sync_master_trace_level), + CMD_LINE(REQUIRED_ARG), + VALID_RANGE(0,~0L),DEFAULT(32),BLOCK_SIZE(1), + NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(0), + ON_UPDATE(fix_rpl_semi_sync_master_trace_level)); + +static const char *repl_semisync_wait_point[]= +{"AFTER_SYNC", "AFTER_COMMIT", NullS}; + +static Sys_var_on_access_global<Sys_var_enum, + PRIV_SET_SYSTEM_GLOBAL_VAR_RPL_SEMI_SYNC_MASTER_WAIT_POINT> +Sys_semisync_master_wait_point( + "rpl_semi_sync_master_wait_point", + "Should transaction wait for semi-sync ack after having synced binlog, " + "or after having committed in storage engine.", + GLOBAL_VAR(rpl_semi_sync_master_wait_point), CMD_LINE(REQUIRED_ARG), + repl_semisync_wait_point, DEFAULT(1), + NO_MUTEX_GUARD, NOT_IN_BINLOG,ON_CHECK(0), + ON_UPDATE(fix_rpl_semi_sync_master_wait_point)); + +static bool fix_rpl_semi_sync_slave_enabled(sys_var *self, THD *thd, + enum_var_type type) +{ + repl_semisync_slave.set_slave_enabled(rpl_semi_sync_slave_enabled != 0); + return false; +} + +static bool fix_rpl_semi_sync_slave_trace_level(sys_var *self, THD *thd, + enum_var_type type) +{ + repl_semisync_slave.set_trace_level(rpl_semi_sync_slave_trace_level); + return false; +} + +static bool fix_rpl_semi_sync_slave_delay_master(sys_var *self, THD *thd, + enum_var_type type) +{ + repl_semisync_slave.set_delay_master(rpl_semi_sync_slave_delay_master); + return false; +} + +static bool fix_rpl_semi_sync_slave_kill_conn_timeout(sys_var *self, THD *thd, + enum_var_type type) +{ + repl_semisync_slave. + set_kill_conn_timeout(rpl_semi_sync_slave_kill_conn_timeout); + return false; +} + +static Sys_var_on_access_global<Sys_var_mybool, + PRIV_SET_SYSTEM_GLOBAL_VAR_RPL_SEMI_SYNC_SLAVE_ENABLED> +Sys_semisync_slave_enabled( + "rpl_semi_sync_slave_enabled", + "Enable semi-synchronous replication slave (disabled by default).", + GLOBAL_VAR(rpl_semi_sync_slave_enabled), + CMD_LINE(OPT_ARG), DEFAULT(FALSE), + NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(0), + ON_UPDATE(fix_rpl_semi_sync_slave_enabled)); + +static Sys_var_on_access_global<Sys_var_ulong, + PRIV_SET_SYSTEM_GLOBAL_VAR_RPL_SEMI_SYNC_SLAVE_TRACE_LEVEL> +Sys_semisync_slave_trace_level( + "rpl_semi_sync_slave_trace_level", + "The tracing level for semi-sync replication.", + GLOBAL_VAR(rpl_semi_sync_slave_trace_level), + CMD_LINE(REQUIRED_ARG), + VALID_RANGE(0,~0L),DEFAULT(32),BLOCK_SIZE(1), + NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(0), + ON_UPDATE(fix_rpl_semi_sync_slave_trace_level)); + +static Sys_var_on_access_global<Sys_var_mybool, + PRIV_SET_SYSTEM_GLOBAL_VAR_RPL_SEMI_SYNC_SLAVE_DELAY_MASTER> +Sys_semisync_slave_delay_master( + "rpl_semi_sync_slave_delay_master", + "Only write master info file when ack is needed.", + GLOBAL_VAR(rpl_semi_sync_slave_delay_master), + CMD_LINE(OPT_ARG), DEFAULT(FALSE), + NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(0), + ON_UPDATE(fix_rpl_semi_sync_slave_delay_master)); + +static Sys_var_on_access_global<Sys_var_uint, + PRIV_SET_SYSTEM_GLOBAL_VAR_RPL_SEMI_SYNC_SLAVE_KILL_CONN_TIMEOUT> +Sys_semisync_slave_kill_conn_timeout( + "rpl_semi_sync_slave_kill_conn_timeout", + "Timeout for the mysql connection used to kill the slave io_thread's " + "connection on master. This timeout comes into play when stop slave " + "is executed.", + GLOBAL_VAR(rpl_semi_sync_slave_kill_conn_timeout), + CMD_LINE(OPT_ARG), + VALID_RANGE(0, UINT_MAX), DEFAULT(5), BLOCK_SIZE(1), + NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(0), + ON_UPDATE(fix_rpl_semi_sync_slave_kill_conn_timeout)); +#endif /* HAVE_REPLICATION */ + +static Sys_var_on_access_global<Sys_var_ulong, + PRIV_SET_SYSTEM_GLOBAL_VAR_SLOW_LAUNCH_TIME> +Sys_slow_launch_time( + "slow_launch_time", + "If creating the thread takes longer than this value (in seconds), " + "the Slow_launch_threads counter will be incremented", + GLOBAL_VAR(slow_launch_time), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(0, LONG_TIMEOUT), DEFAULT(2), BLOCK_SIZE(1)); + +static Sys_var_ulonglong Sys_sort_buffer( + "sort_buffer_size", + "Each thread that needs to do a sort allocates a buffer of this size", + SESSION_VAR(sortbuff_size), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(MIN_SORT_MEMORY, SIZE_T_MAX), DEFAULT(MAX_SORT_MEMORY), + BLOCK_SIZE(1)); + +export sql_mode_t expand_sql_mode(sql_mode_t sql_mode) +{ + if (sql_mode & MODE_ANSI) + { + /* + Note that we don't set + MODE_NO_KEY_OPTIONS | MODE_NO_TABLE_OPTIONS | MODE_NO_FIELD_OPTIONS + to allow one to get full use of MySQL in this mode. + + MODE_ONLY_FULL_GROUP_BY was removed from ANSI mode because it is + currently overly restrictive (see BUG#8510). + */ + sql_mode|= (MODE_REAL_AS_FLOAT | MODE_PIPES_AS_CONCAT | MODE_ANSI_QUOTES | + MODE_IGNORE_SPACE); + } + if (sql_mode & MODE_ORACLE) + sql_mode|= (MODE_PIPES_AS_CONCAT | MODE_ANSI_QUOTES | + MODE_IGNORE_SPACE | + MODE_NO_KEY_OPTIONS | MODE_NO_TABLE_OPTIONS | + MODE_NO_FIELD_OPTIONS | MODE_NO_AUTO_CREATE_USER | + MODE_SIMULTANEOUS_ASSIGNMENT); + if (sql_mode & MODE_MSSQL) + sql_mode|= (MODE_PIPES_AS_CONCAT | MODE_ANSI_QUOTES | + MODE_IGNORE_SPACE | + MODE_NO_KEY_OPTIONS | MODE_NO_TABLE_OPTIONS | + MODE_NO_FIELD_OPTIONS); + if (sql_mode & MODE_POSTGRESQL) + sql_mode|= (MODE_PIPES_AS_CONCAT | MODE_ANSI_QUOTES | + MODE_IGNORE_SPACE | + MODE_NO_KEY_OPTIONS | MODE_NO_TABLE_OPTIONS | + MODE_NO_FIELD_OPTIONS); + if (sql_mode & MODE_DB2) + sql_mode|= (MODE_PIPES_AS_CONCAT | MODE_ANSI_QUOTES | + MODE_IGNORE_SPACE | + MODE_NO_KEY_OPTIONS | MODE_NO_TABLE_OPTIONS | + MODE_NO_FIELD_OPTIONS); + if (sql_mode & MODE_MAXDB) + sql_mode|= (MODE_PIPES_AS_CONCAT | MODE_ANSI_QUOTES | + MODE_IGNORE_SPACE | + MODE_NO_KEY_OPTIONS | MODE_NO_TABLE_OPTIONS | + MODE_NO_FIELD_OPTIONS | MODE_NO_AUTO_CREATE_USER); + if (sql_mode & MODE_MYSQL40) + sql_mode|= MODE_HIGH_NOT_PRECEDENCE; + if (sql_mode & MODE_MYSQL323) + sql_mode|= MODE_HIGH_NOT_PRECEDENCE; + if (sql_mode & MODE_TRADITIONAL) + sql_mode|= (MODE_STRICT_TRANS_TABLES | MODE_STRICT_ALL_TABLES | + MODE_NO_ZERO_IN_DATE | MODE_NO_ZERO_DATE | + MODE_ERROR_FOR_DIVISION_BY_ZERO | MODE_NO_AUTO_CREATE_USER | + MODE_NO_ENGINE_SUBSTITUTION); + return sql_mode; +} +static bool check_sql_mode(sys_var *self, THD *thd, set_var *var) +{ + var->save_result.ulonglong_value= + (ulonglong) expand_sql_mode(var->save_result.ulonglong_value); + return false; +} +static bool fix_sql_mode(sys_var *self, THD *thd, enum_var_type type) +{ + if (type != OPT_GLOBAL) + { + /* Update thd->server_status */ + if (thd->variables.sql_mode & MODE_NO_BACKSLASH_ESCAPES) + thd->server_status|= SERVER_STATUS_NO_BACKSLASH_ESCAPES; + else + thd->server_status&= ~SERVER_STATUS_NO_BACKSLASH_ESCAPES; + if (thd->variables.sql_mode & MODE_ANSI_QUOTES) + thd->server_status|= SERVER_STATUS_ANSI_QUOTES; + else + thd->server_status&= ~SERVER_STATUS_ANSI_QUOTES; + } + return false; +} +/* + WARNING: When adding new SQL modes don't forget to update the + tables definitions that stores it's value (ie: mysql.event, mysql.proc) +*/ +static const char *sql_mode_names[]= +{ + "REAL_AS_FLOAT", "PIPES_AS_CONCAT", "ANSI_QUOTES", "IGNORE_SPACE", + "IGNORE_BAD_TABLE_OPTIONS", + "ONLY_FULL_GROUP_BY", "NO_UNSIGNED_SUBTRACTION", "NO_DIR_IN_CREATE", + "POSTGRESQL", "ORACLE", "MSSQL", "DB2", "MAXDB", "NO_KEY_OPTIONS", + "NO_TABLE_OPTIONS", "NO_FIELD_OPTIONS", "MYSQL323", "MYSQL40", "ANSI", + "NO_AUTO_VALUE_ON_ZERO", "NO_BACKSLASH_ESCAPES", "STRICT_TRANS_TABLES", + "STRICT_ALL_TABLES", "NO_ZERO_IN_DATE", "NO_ZERO_DATE", + "ALLOW_INVALID_DATES", "ERROR_FOR_DIVISION_BY_ZERO", "TRADITIONAL", + "NO_AUTO_CREATE_USER", "HIGH_NOT_PRECEDENCE", "NO_ENGINE_SUBSTITUTION", + "PAD_CHAR_TO_FULL_LENGTH", "EMPTY_STRING_IS_NULL", "SIMULTANEOUS_ASSIGNMENT", + "TIME_ROUND_FRACTIONAL", + 0 +}; + + +const char *sql_mode_string_representation(uint bit_number) +{ + DBUG_ASSERT(bit_number < array_elements(sql_mode_names)); + return sql_mode_names[bit_number]; +} + + +export bool sql_mode_string_representation(THD *thd, sql_mode_t sql_mode, + LEX_CSTRING *ls) +{ + set_to_string(thd, ls, sql_mode, sql_mode_names); + return ls->str == 0; +} +/* + sql_mode should *not* be IN_BINLOG: even though it is written to the binlog, + the slave ignores the MODE_NO_DIR_IN_CREATE variable, so slave's value + differs from master's (see log_event.cc: Query_log_event::do_apply_event()). +*/ +static Sys_var_set Sys_sql_mode( + "sql_mode", + "Sets the sql mode", + SESSION_VAR(sql_mode), CMD_LINE(REQUIRED_ARG), + sql_mode_names, + DEFAULT(MODE_STRICT_TRANS_TABLES | + MODE_ERROR_FOR_DIVISION_BY_ZERO | + MODE_NO_ENGINE_SUBSTITUTION | + MODE_NO_AUTO_CREATE_USER), + NO_MUTEX_GUARD, NOT_IN_BINLOG, + ON_CHECK(check_sql_mode), ON_UPDATE(fix_sql_mode)); + +static const char *old_mode_names[]= +{ + "NO_DUP_KEY_WARNINGS_WITH_IGNORE", + "NO_PROGRESS_INFO", + "ZERO_DATE_TIME_CAST", + "UTF8_IS_UTF8MB3", + "IGNORE_INDEX_ONLY_FOR_JOIN", + "COMPAT_5_1_CHECKSUM", + 0 +}; + +/* + sql_mode should *not* be IN_BINLOG as the slave can't remember this + anyway on restart. +*/ +static Sys_var_set Sys_old_behavior( + "old_mode", + "Used to emulate old behavior from earlier MariaDB or MySQL versions", + SESSION_VAR(old_behavior), CMD_LINE(REQUIRED_ARG), + old_mode_names, DEFAULT(OLD_MODE_UTF8_IS_UTF8MB3)); + +#if defined(HAVE_OPENSSL) && !defined(EMBEDDED_LIBRARY) +#define SSL_OPT(X) CMD_LINE(REQUIRED_ARG,X) +#else +#define SSL_OPT(X) NO_CMD_LINE +#endif + +static Sys_var_charptr_fscs Sys_ssl_ca( + "ssl_ca", + "CA file in PEM format (check OpenSSL docs, implies --ssl)", + READ_ONLY GLOBAL_VAR(opt_ssl_ca), SSL_OPT(OPT_SSL_CA), + DEFAULT(0)); + +static Sys_var_charptr_fscs Sys_ssl_capath( + "ssl_capath", + "CA directory (check OpenSSL docs, implies --ssl)", + READ_ONLY GLOBAL_VAR(opt_ssl_capath), SSL_OPT(OPT_SSL_CAPATH), + DEFAULT(0)); + +static Sys_var_charptr_fscs Sys_ssl_cert( + "ssl_cert", "X509 cert in PEM format (implies --ssl)", + READ_ONLY GLOBAL_VAR(opt_ssl_cert), SSL_OPT(OPT_SSL_CERT), + DEFAULT(0)); + +static Sys_var_charptr_fscs Sys_ssl_cipher( + "ssl_cipher", "SSL cipher to use (implies --ssl)", + READ_ONLY GLOBAL_VAR(opt_ssl_cipher), SSL_OPT(OPT_SSL_CIPHER), + DEFAULT(0)); + +static Sys_var_charptr_fscs Sys_ssl_key( + "ssl_key", "X509 key in PEM format (implies --ssl)", + READ_ONLY GLOBAL_VAR(opt_ssl_key), SSL_OPT(OPT_SSL_KEY), + DEFAULT(0)); + +static Sys_var_charptr_fscs Sys_ssl_crl( + "ssl_crl", + "CRL file in PEM format (check OpenSSL docs, implies --ssl)", + READ_ONLY GLOBAL_VAR(opt_ssl_crl), SSL_OPT(OPT_SSL_CRL), + DEFAULT(0)); + +static Sys_var_charptr_fscs Sys_ssl_crlpath( + "ssl_crlpath", + "CRL directory (check OpenSSL docs, implies --ssl)", + READ_ONLY GLOBAL_VAR(opt_ssl_crlpath), SSL_OPT(OPT_SSL_CRLPATH), + DEFAULT(0)); + +static const char *tls_version_names[]= +{ + "TLSv1.0", + "TLSv1.1", + "TLSv1.2", + "TLSv1.3", + 0 +}; + +export bool tls_version_string_representation(THD *thd, sql_mode_t sql_mode, + LEX_CSTRING *ls) +{ + set_to_string(thd, ls, tls_version, tls_version_names); + return ls->str == 0; +} + +static Sys_var_set Sys_tls_version( + "tls_version", + "TLS protocol version for secure connections.", + READ_ONLY GLOBAL_VAR(tls_version), CMD_LINE(REQUIRED_ARG), + tls_version_names, + DEFAULT(VIO_TLSv1_2 | VIO_TLSv1_3)); + +static Sys_var_mybool Sys_standard_compliant_cte( + "standard_compliant_cte", + "Allow only CTEs compliant to SQL standard", + SESSION_VAR(only_standard_compliant_cte), CMD_LINE(OPT_ARG), + DEFAULT(TRUE)); + + +// why ENUM and not BOOL ? +static const char *updatable_views_with_limit_names[]= {"NO", "YES", 0}; +static Sys_var_enum Sys_updatable_views_with_limit( + "updatable_views_with_limit", + "YES = Don't issue an error message (warning only) if a VIEW without " + "presence of a key of the underlying table is used in queries with a " + "LIMIT clause for updating. NO = Prohibit update of a VIEW, which " + "does not contain a key of the underlying table and the query uses " + "a LIMIT clause (usually get from GUI tools)", + SESSION_VAR(updatable_views_with_limit), CMD_LINE(REQUIRED_ARG), + updatable_views_with_limit_names, DEFAULT(TRUE)); + +static Sys_var_mybool Sys_sync_frm( + "sync_frm", "Sync .frm files to disk on creation", + GLOBAL_VAR(opt_sync_frm), CMD_LINE(OPT_ARG), + DEFAULT(TRUE)); + +static char *system_time_zone_ptr; +static Sys_var_charptr Sys_system_time_zone( + "system_time_zone", "The server system time zone", + READ_ONLY GLOBAL_VAR(system_time_zone_ptr), + CMD_LINE_HELP_ONLY, + DEFAULT(system_time_zone)); + +/* + If One use views with prepared statements this should be bigger than + table_open_cache (now we allow 2 times bigger value) +*/ +static Sys_var_ulong Sys_table_def_size( + "table_definition_cache", + "The number of cached table definitions", + GLOBAL_VAR(tdc_size), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(TABLE_DEF_CACHE_MIN, 2*1024*1024), + DEFAULT(TABLE_DEF_CACHE_DEFAULT), BLOCK_SIZE(1)); + + +static bool fix_table_open_cache(sys_var *, THD *, enum_var_type) +{ + mysql_mutex_unlock(&LOCK_global_system_variables); + tc_purge(); + mysql_mutex_lock(&LOCK_global_system_variables); + return false; +} + +/* Check the table_definition_cache comment if makes changes */ +static Sys_var_ulong Sys_table_cache_size( + "table_open_cache", "The number of cached open tables", + GLOBAL_VAR(tc_size), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(10, 1024*1024), DEFAULT(TABLE_OPEN_CACHE_DEFAULT), + BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(0), + ON_UPDATE(fix_table_open_cache)); + +static Sys_var_uint Sys_table_cache_instances( + "table_open_cache_instances", "Maximum number of table cache instances", + READ_ONLY GLOBAL_VAR(tc_instances), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(1, 64), DEFAULT(8), BLOCK_SIZE(1)); + +static Sys_var_ulong Sys_thread_cache_size( + "thread_cache_size", + "How many threads we should keep in a cache for reuse. These are freed after 5 minutes of idle time", + GLOBAL_VAR(thread_cache_size), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(0, 16384), DEFAULT(256), BLOCK_SIZE(1)); + +#ifdef HAVE_POOL_OF_THREADS +static bool fix_tp_max_threads(sys_var *, THD *, enum_var_type) +{ + tp_set_max_threads(threadpool_max_threads); + return false; +} + + +#ifdef _WIN32 +static bool fix_tp_min_threads(sys_var *, THD *, enum_var_type) +{ + tp_set_min_threads(threadpool_min_threads); + return false; +} +#endif + +static bool check_threadpool_size(sys_var *self, THD *thd, set_var *var) +{ + +#ifdef _WIN32 + if (threadpool_mode != TP_MODE_GENERIC) + return false; +#endif + + ulonglong v= var->save_result.ulonglong_value; + if (v > threadpool_max_size) + { + var->save_result.ulonglong_value= threadpool_max_size; + return throw_bounds_warning(thd, self->name.str, true, true, v); + } + return false; +} + + +static bool fix_threadpool_size(sys_var*, THD*, enum_var_type) +{ + tp_set_threadpool_size(threadpool_size); + return false; +} + + +static bool fix_threadpool_stall_limit(sys_var*, THD*, enum_var_type) +{ + tp_set_threadpool_stall_limit(threadpool_stall_limit); + return false; +} + +#ifdef _WIN32 +static Sys_var_on_access_global<Sys_var_uint, + PRIV_SET_SYSTEM_GLOBAL_VAR_THREAD_POOL> +Sys_threadpool_min_threads( + "thread_pool_min_threads", + "Minimum number of threads in the thread pool.", + GLOBAL_VAR(threadpool_min_threads), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(1, 256), DEFAULT(1), BLOCK_SIZE(1), + NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(0), + ON_UPDATE(fix_tp_min_threads) + ); + +static const char *threadpool_mode_names[]={ "windows", "generic", 0 }; +static Sys_var_on_access_global<Sys_var_enum, + PRIV_SET_SYSTEM_GLOBAL_VAR_THREAD_POOL> +Sys_threadpool_mode( + "thread_pool_mode", + "Chose implementation of the threadpool", + READ_ONLY GLOBAL_VAR(threadpool_mode), CMD_LINE(REQUIRED_ARG), + threadpool_mode_names, DEFAULT(TP_MODE_WINDOWS) + ); +#endif + +static const char *threadpool_priority_names[]={ "high", "low", "auto", 0 }; +static Sys_var_on_access_global<Sys_var_enum, + PRIV_SET_SYSTEM_GLOBAL_VAR_THREAD_POOL> +Sys_thread_pool_priority( + "thread_pool_priority", + "Threadpool priority. High priority connections usually start executing earlier than low priority." + "If priority set to 'auto', the the actual priority(low or high) is determined based on whether or not connection is inside transaction.", + SESSION_VAR(threadpool_priority), CMD_LINE(REQUIRED_ARG), + threadpool_priority_names, DEFAULT(TP_PRIORITY_AUTO)); + +static Sys_var_on_access_global<Sys_var_uint, + PRIV_SET_SYSTEM_GLOBAL_VAR_THREAD_POOL> +Sys_threadpool_idle_thread_timeout( + "thread_pool_idle_timeout", + "Timeout in seconds for an idle thread in the thread pool." + "Worker thread will be shut down after timeout", + GLOBAL_VAR(threadpool_idle_timeout), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(1, UINT_MAX), DEFAULT(60), BLOCK_SIZE(1) +); +static Sys_var_on_access_global<Sys_var_uint, + PRIV_SET_SYSTEM_GLOBAL_VAR_THREAD_POOL> +Sys_threadpool_oversubscribe( + "thread_pool_oversubscribe", + "How many additional active worker threads in a group are allowed.", + GLOBAL_VAR(threadpool_oversubscribe), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(1, 1000), DEFAULT(3), BLOCK_SIZE(1) +); +static Sys_var_on_access_global<Sys_var_uint, + PRIV_SET_SYSTEM_GLOBAL_VAR_THREAD_POOL> +Sys_threadpool_size( + "thread_pool_size", + "Number of thread groups in the pool. " + "This parameter is roughly equivalent to maximum number of concurrently " + "executing threads (threads in a waiting state do not count as executing).", + GLOBAL_VAR(threadpool_size), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(1, MAX_THREAD_GROUPS), DEFAULT(8), BLOCK_SIZE(1), + NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_threadpool_size), + ON_UPDATE(fix_threadpool_size) +); +static Sys_var_on_access_global<Sys_var_uint, + PRIV_SET_SYSTEM_GLOBAL_VAR_THREAD_POOL> +Sys_threadpool_stall_limit( + "thread_pool_stall_limit", + "Maximum query execution time in milliseconds," + "before an executing non-yielding thread is considered stalled." + "If a worker thread is stalled, additional worker thread " + "may be created to handle remaining clients.", + GLOBAL_VAR(threadpool_stall_limit), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(1, UINT_MAX), DEFAULT(DEFAULT_THREADPOOL_STALL_LIMIT), BLOCK_SIZE(1), + NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(0), + ON_UPDATE(fix_threadpool_stall_limit) +); + +static Sys_var_on_access_global<Sys_var_uint, + PRIV_SET_SYSTEM_GLOBAL_VAR_THREAD_POOL> +Sys_threadpool_max_threads( + "thread_pool_max_threads", + "Maximum allowed number of worker threads in the thread pool", + GLOBAL_VAR(threadpool_max_threads), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(1, 65536), DEFAULT(65536), BLOCK_SIZE(1), + NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(0), + ON_UPDATE(fix_tp_max_threads) +); + +static Sys_var_on_access_global<Sys_var_uint, + PRIV_SET_SYSTEM_GLOBAL_VAR_THREAD_POOL> +Sys_threadpool_threadpool_prio_kickup_timer( + "thread_pool_prio_kickup_timer", + "The number of milliseconds before a dequeued low-priority statement is moved to the high-priority queue", + GLOBAL_VAR(threadpool_prio_kickup_timer), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(0, UINT_MAX), DEFAULT(1000), BLOCK_SIZE(1) +); + +static Sys_var_on_access_global<Sys_var_mybool, + PRIV_SET_SYSTEM_GLOBAL_VAR_THREAD_POOL> +Sys_threadpool_exact_stats( + "thread_pool_exact_stats", + "If set to 1, provides better statistics in information_schema threadpool tables", + GLOBAL_VAR(threadpool_exact_stats), CMD_LINE(OPT_ARG), DEFAULT(FALSE), + NO_MUTEX_GUARD, NOT_IN_BINLOG +); + +static Sys_var_on_access_global<Sys_var_mybool, + PRIV_SET_SYSTEM_GLOBAL_VAR_THREAD_POOL> +Sys_threadpool_dedicated_listener( + "thread_pool_dedicated_listener", + "If set to 1,listener thread will not pick up queries", + GLOBAL_VAR(threadpool_dedicated_listener), CMD_LINE(OPT_ARG), DEFAULT(FALSE), + NO_MUTEX_GUARD, NOT_IN_BINLOG +); +#endif /* HAVE_POOL_OF_THREADS */ + +/** + Can't change the 'next' tx_isolation if we are already in a + transaction. +*/ + +static bool check_tx_isolation(sys_var *self, THD *thd, set_var *var) +{ + if (var->type == OPT_DEFAULT && thd->in_active_multi_stmt_transaction()) + { + DBUG_ASSERT(thd->in_multi_stmt_transaction_mode()); + my_error(ER_CANT_CHANGE_TX_CHARACTERISTICS, MYF(0)); + return TRUE; + } + return FALSE; +} + +// NO_CMD_LINE - different name of the option +static Sys_var_tx_isolation Sys_tx_isolation( + "tx_isolation", "Default transaction isolation level", + NO_SET_STMT SESSION_VAR(tx_isolation), NO_CMD_LINE, + tx_isolation_names, DEFAULT(ISO_REPEATABLE_READ), + NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_tx_isolation)); + + +/** + Can't change the tx_read_only state if we are already in a + transaction. +*/ + +static bool check_tx_read_only(sys_var *self, THD *thd, set_var *var) +{ + if (var->type == OPT_DEFAULT && thd->in_active_multi_stmt_transaction()) + { + DBUG_ASSERT(thd->in_multi_stmt_transaction_mode()); + my_error(ER_CANT_CHANGE_TX_CHARACTERISTICS, MYF(0)); + return true; + } + return false; +} + + +bool Sys_var_tx_read_only::session_update(THD *thd, set_var *var) +{ + if (var->type == OPT_SESSION && Sys_var_mybool::session_update(thd, var)) + return true; + if (var->type == OPT_DEFAULT || !thd->in_active_multi_stmt_transaction()) + { + // @see Sys_var_tx_isolation::session_update() above for the rules. + thd->tx_read_only= var->save_result.ulonglong_value; + +#ifndef EMBEDDED_LIBRARY + if (thd->variables.session_track_transaction_info > TX_TRACK_NONE) + { + if (var->type == OPT_DEFAULT) + thd->session_tracker.transaction_info.set_read_flags(thd, + thd->tx_read_only ? TX_READ_ONLY : TX_READ_WRITE); + else + thd->session_tracker.transaction_info.set_read_flags(thd, + TX_READ_INHERIT); + } +#endif //EMBEDDED_LIBRARY + } + return false; +} + + +static Sys_var_tx_read_only Sys_tx_read_only( + "tx_read_only", "Default transaction access mode. If set to OFF, " + "the default, access is read/write. If set to ON, access is read-only. " + "The SET TRANSACTION statement can also change the value of this variable. " + "See SET TRANSACTION and START TRANSACTION.", + SESSION_VAR(tx_read_only), NO_CMD_LINE, DEFAULT(0), + NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_tx_read_only)); + +static Sys_var_ulonglong Sys_tmp_table_size( + "tmp_table_size", + "Alias for tmp_memory_table_size. " + "If an internal in-memory temporary table exceeds this size, MariaDB " + "will automatically convert it to an on-disk MyISAM or Aria table.", + SESSION_VAR(tmp_memory_table_size), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(0, (ulonglong)~(intptr)0), DEFAULT(16*1024*1024), + BLOCK_SIZE(1)); + +static Sys_var_ulonglong Sys_tmp_memory_table_size( + "tmp_memory_table_size", + "If an internal in-memory temporary table exceeds this size, MariaDB " + "will automatically convert it to an on-disk MyISAM or Aria table. " + "Same as tmp_table_size.", + SESSION_VAR(tmp_memory_table_size), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(0, (ulonglong)~(intptr)0), DEFAULT(16*1024*1024), + BLOCK_SIZE(1)); + +static Sys_var_ulonglong Sys_tmp_disk_table_size( + "tmp_disk_table_size", + "Max size for data for an internal temporary on-disk MyISAM or Aria table.", + SESSION_VAR(tmp_disk_table_size), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(1024, (ulonglong)~(intptr)0), + DEFAULT((ulonglong)~(intptr)0), BLOCK_SIZE(1)); + +static Sys_var_charptr Sys_version( + "version", "Server version number. It may also include a suffix " + "with configuration or build information. -debug indicates " + "debugging support was enabled on the server, and -log indicates " + "at least one of the binary log, general log or slow query log are " + "enabled, for example 10.1.1-MariaDB-mariadb1precise-log.", + READ_ONLY GLOBAL_VAR(server_version_ptr), + CMD_LINE_HELP_ONLY, + DEFAULT(server_version)); + +static char *server_version_comment_ptr; +static Sys_var_charptr Sys_version_comment( + "version_comment", "Value of the COMPILATION_COMMENT option " + "specified by CMake when building MariaDB, for example " + "mariadb.org binary distribution.", + READ_ONLY GLOBAL_VAR(server_version_comment_ptr), + CMD_LINE_HELP_ONLY, + DEFAULT(MYSQL_COMPILATION_COMMENT)); + +static char *server_version_compile_machine_ptr; +static Sys_var_charptr Sys_version_compile_machine( + "version_compile_machine", "The machine type or architecture " + "MariaDB was built on, for example i686.", + READ_ONLY GLOBAL_VAR(server_version_compile_machine_ptr), + CMD_LINE_HELP_ONLY, DEFAULT(DEFAULT_MACHINE)); + +static char *server_version_compile_os_ptr; +static Sys_var_charptr Sys_version_compile_os( + "version_compile_os", "Operating system that MariaDB was built " + "on, for example debian-linux-gnu.", + READ_ONLY GLOBAL_VAR(server_version_compile_os_ptr), + CMD_LINE_HELP_ONLY, + DEFAULT(SYSTEM_TYPE)); + +#include <source_revision.h> +static char *server_version_source_revision; +static Sys_var_charptr Sys_version_source_revision( + "version_source_revision", "Source control revision id for MariaDB source code", + READ_ONLY GLOBAL_VAR(server_version_source_revision), + CMD_LINE_HELP_ONLY, + DEFAULT(SOURCE_REVISION)); + +static char *malloc_library; +static Sys_var_charptr Sys_malloc_library( + "version_malloc_library", "Version of the used malloc library", + READ_ONLY GLOBAL_VAR(malloc_library), CMD_LINE_HELP_ONLY, + DEFAULT(guess_malloc_library())); + +static char *ssl_library; +static Sys_var_charptr Sys_ssl_library( + "version_ssl_library", "Version of the used SSL library", + READ_ONLY GLOBAL_VAR(ssl_library), CMD_LINE_HELP_ONLY, + DEFAULT(SSL_LIBRARY)); + +static Sys_var_ulong Sys_net_wait_timeout( + "wait_timeout", + "The number of seconds the server waits for activity on a " + "connection before closing it", + NO_SET_STMT SESSION_VAR(net_wait_timeout), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(1, IF_WIN(INT_MAX32/1000, LONG_TIMEOUT)), + DEFAULT(NET_WAIT_TIMEOUT), BLOCK_SIZE(1)); + +static Sys_var_uint Sys_idle_transaction_timeout( + "idle_transaction_timeout", + "The number of seconds the server waits for idle transaction", + SESSION_VAR(idle_transaction_timeout), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(0, IF_WIN(INT_MAX32/1000, LONG_TIMEOUT)), + DEFAULT(0), BLOCK_SIZE(1)); + +static Sys_var_uint Sys_idle_readonly_transaction_timeout( + "idle_readonly_transaction_timeout", + "The number of seconds the server waits for read-only idle transaction", + SESSION_VAR(idle_readonly_transaction_timeout), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(0, IF_WIN(INT_MAX32/1000, LONG_TIMEOUT)), + DEFAULT(0), BLOCK_SIZE(1)); + +static Sys_var_uint Sys_idle_write_transaction_timeout( + "idle_write_transaction_timeout", + "The number of seconds the server waits for write idle transaction", + SESSION_VAR(idle_write_transaction_timeout), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(0, IF_WIN(INT_MAX32/1000, LONG_TIMEOUT)), + DEFAULT(0), BLOCK_SIZE(1)); + +static Sys_var_plugin Sys_default_storage_engine( + "default_storage_engine", "The default storage engine for new tables", + SESSION_VAR(table_plugin), NO_CMD_LINE, + MYSQL_STORAGE_ENGINE_PLUGIN, DEFAULT(&default_storage_engine), + NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_not_null)); + +static Sys_var_plugin Sys_storage_engine( + "storage_engine", "Alias for @@default_storage_engine. Deprecated", + SESSION_VAR(table_plugin), NO_CMD_LINE, + MYSQL_STORAGE_ENGINE_PLUGIN, DEFAULT(&default_storage_engine), + NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_not_null), ON_UPDATE(0), + DEPRECATED("'@@default_storage_engine'")); // since 10.5.1 + +static Sys_var_plugin Sys_default_tmp_storage_engine( + "default_tmp_storage_engine", "The default storage engine for user-created temporary tables", + SESSION_VAR(tmp_table_plugin), NO_CMD_LINE, + MYSQL_STORAGE_ENGINE_PLUGIN, DEFAULT(&default_tmp_storage_engine), + NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_engine_supports_temporary)); + +static Sys_var_plugin Sys_enforce_storage_engine( + "enforce_storage_engine", "Force the use of a storage engine for new tables", + SESSION_VAR(enforced_table_plugin), + NO_CMD_LINE, MYSQL_STORAGE_ENGINE_PLUGIN, + DEFAULT(&enforced_storage_engine), NO_MUTEX_GUARD, NOT_IN_BINLOG, + ON_CHECK(check_has_super)); + + +#ifdef HAVE_REPLICATION +/* + Check + 1. Value for gtid_pos_auto_engines is not NULL. + 2. No slave SQL thread is running. +*/ +static bool +check_gtid_pos_auto_engines(sys_var *self, THD *thd, set_var *var) +{ + bool running; + bool err= false; + + DBUG_ASSERT(var->type == OPT_GLOBAL); + if (var->value && var->value->is_null()) + err= true; + else + { + running= give_error_if_slave_running(false); + if (running) + err= true; + } + return err; +} + + +static Sys_var_on_access_global<Sys_var_pluginlist, + PRIV_SET_SYSTEM_GLOBAL_VAR_GTID_POS_AUTO_ENGINES> +Sys_gtid_pos_auto_engines( + "gtid_pos_auto_engines", + "List of engines for which to automatically create a " + "mysql.gtid_slave_pos_ENGINE table, if a transaction using that engine " + "is replicated. This can be used to avoid introducing cross-engine " + "transactions, if engines are used different from that used by table " + "mysql.gtid_slave_pos", + GLOBAL_VAR(opt_gtid_pos_auto_plugins), NO_CMD_LINE, + DEFAULT(>id_pos_auto_engines), + NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_gtid_pos_auto_engines)); +#endif + + +#if defined(ENABLED_DEBUG_SYNC) +/* + Variable can be set for the session only. + + This could be changed later. Then we need to have a global array of + actions in addition to the thread local ones. SET GLOBAL would + manage the global array, SET [SESSION] the local array. A sync point + would need to look for a local and a global action. Setting and + executing of global actions need to be protected by a mutex. + + The purpose of global actions could be to allow synchronizing with + connectionless threads that cannot execute SET statements. +*/ +static Sys_var_debug_sync Sys_debug_sync( + "debug_sync", "Debug Sync Facility", + NO_SET_STMT sys_var::ONLY_SESSION, NO_CMD_LINE, + DEFAULT(0), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_has_super)); +#endif /* defined(ENABLED_DEBUG_SYNC) */ + +/** + "time_format" "date_format" "datetime_format" + + the following three variables are unused, and the source of confusion + (bug reports like "I've changed date_format, but date format hasn't changed. + I've made them read-only, to alleviate the situation somewhat. + + @todo make them NO_CMD_LINE ? +*/ +static Sys_var_charptr Sys_date_format( + "date_format", "The DATE format (ignored)", + READ_ONLY GLOBAL_VAR(global_date_format.format.str), + CMD_LINE(REQUIRED_ARG), + DEFAULT(known_date_time_formats[ISO_FORMAT].date_format), + NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(0), ON_UPDATE(0), + DEPRECATED("")); // since 10.1.2 + +static Sys_var_charptr Sys_datetime_format( + "datetime_format", "The DATETIME format (ignored)", + READ_ONLY GLOBAL_VAR(global_datetime_format.format.str), + CMD_LINE(REQUIRED_ARG), + DEFAULT(known_date_time_formats[ISO_FORMAT].datetime_format), + NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(0), ON_UPDATE(0), + DEPRECATED("")); // since 10.1.2 + +static Sys_var_charptr Sys_time_format( + "time_format", "The TIME format (ignored)", + READ_ONLY GLOBAL_VAR(global_time_format.format.str), + CMD_LINE(REQUIRED_ARG), + DEFAULT(known_date_time_formats[ISO_FORMAT].time_format), + NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(0), ON_UPDATE(0), + DEPRECATED("")); // since 10.1.2 + +static bool fix_autocommit(sys_var *self, THD *thd, enum_var_type type) +{ + if (type == OPT_GLOBAL) + { + if (global_system_variables.option_bits & OPTION_AUTOCOMMIT) + global_system_variables.option_bits&= ~OPTION_NOT_AUTOCOMMIT; + else + global_system_variables.option_bits|= OPTION_NOT_AUTOCOMMIT; + return false; + } + + if (test_all_bits(thd->variables.option_bits, + (OPTION_AUTOCOMMIT | OPTION_NOT_AUTOCOMMIT))) + { + // activating autocommit + if (trans_commit_stmt(thd) || trans_commit(thd)) + { + thd->variables.option_bits&= ~OPTION_AUTOCOMMIT; + thd->release_transactional_locks(); + WSREP_DEBUG("autocommit, MDL TRX lock released: %lld", + (longlong) thd->thread_id); + return true; + } + /* + Don't close thread tables or release metadata locks: if we do so, we + risk releasing locks/closing tables of expressions used to assign + other variables, as in: + set @var=my_stored_function1(), @@autocommit=1, @var2=(select MY_MAX(a) + from my_table), ... + The locks will be released at statement end anyway, as SET + statement that assigns autocommit is marked to commit + transaction implicitly at the end (@sa stmt_causes_implicitcommit()). + */ + thd->variables.option_bits&= + ~(OPTION_BEGIN | OPTION_BINLOG_THIS_TRX | OPTION_NOT_AUTOCOMMIT | + OPTION_GTID_BEGIN); + thd->transaction->all.modified_non_trans_table= false; + thd->transaction->all.m_unsafe_rollback_flags&= ~THD_TRANS::DID_WAIT; + thd->server_status|= SERVER_STATUS_AUTOCOMMIT; + return false; + } + + if ((thd->variables.option_bits & + (OPTION_AUTOCOMMIT |OPTION_NOT_AUTOCOMMIT)) == 0) + { + // disabling autocommit + thd->transaction->all.modified_non_trans_table= false; + thd->transaction->all.m_unsafe_rollback_flags&= ~THD_TRANS::DID_WAIT; + thd->server_status&= ~SERVER_STATUS_AUTOCOMMIT; + thd->variables.option_bits|= OPTION_NOT_AUTOCOMMIT; + return false; + } + + return false; // autocommit value wasn't changed +} + +static Sys_var_bit Sys_autocommit( + "autocommit", "If set to 1, the default, all queries are committed " + "immediately. If set to 0, they are only committed upon a COMMIT statement" + ", or rolled back with a ROLLBACK statement. If autocommit is set to 0, " + "and then changed to 1, all open transactions are immediately committed.", + NO_SET_STMT SESSION_VAR(option_bits), NO_CMD_LINE, + OPTION_AUTOCOMMIT, DEFAULT(TRUE), + NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(0), ON_UPDATE(fix_autocommit)); +export sys_var *Sys_autocommit_ptr= &Sys_autocommit; // for sql_yacc.yy + +static Sys_var_mybool Sys_big_tables( + "big_tables", "Old variable, which if set to 1, allows large result sets " + "by saving all temporary sets to disk, avoiding 'table full' errors. No " + "longer needed, as the server now handles this automatically.", + SESSION_VAR(big_tables), CMD_LINE(OPT_ARG), DEFAULT(FALSE), + NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(0), ON_UPDATE(0), + DEPRECATED("")); // since 10.5.0 + +static Sys_var_bit Sys_big_selects( + "sql_big_selects", "If set to 0, MariaDB will not perform large SELECTs." + " See max_join_size for details. If max_join_size is set to anything but " + "DEFAULT, sql_big_selects is automatically set to 0. If sql_big_selects " + "is again set, max_join_size will be ignored.", + SESSION_VAR(option_bits), NO_CMD_LINE, OPTION_BIG_SELECTS, + DEFAULT(FALSE)); + +static Sys_var_bit Sys_log_off( + "sql_log_off", "If set to 1 (0 is the default), no logging to the general " + "query log is done for the client. Only clients with the SUPER privilege " + "can update this variable.", + NO_SET_STMT SESSION_VAR(option_bits), NO_CMD_LINE, OPTION_LOG_OFF, + DEFAULT(FALSE), NO_MUTEX_GUARD, NOT_IN_BINLOG, + ON_CHECK(check_has_super)); + +/** + This function sets the session variable thd->variables.sql_log_bin + to reflect changes to @@session.sql_log_bin. + + @param[IN] self A pointer to the sys_var, i.e. Sys_log_binlog. + @param[IN] type The type either session or global. + + @return @c FALSE. +*/ +static bool fix_sql_log_bin_after_update(sys_var *self, THD *thd, + enum_var_type type) +{ + DBUG_ASSERT(type == OPT_SESSION); + + thd->set_binlog_bit(); + + return FALSE; +} + +static bool check_session_only_variable(sys_var *self, THD *,set_var *var) +{ + if (unlikely(var->type == OPT_GLOBAL)) + { + my_error(ER_INCORRECT_GLOBAL_LOCAL_VAR, MYF(0), self->name.str, "SESSION"); + return true; + } + return false; +} + +/** + This function checks if the sql_log_bin can be changed, + what is possible if: + - the user is a super user; + - the set is not called from within a function/trigger; + - there is no on-going transaction. + + @param[IN] self A pointer to the sys_var, i.e. Sys_log_binlog. + @param[IN] var A pointer to the set_var created by the parser. + + @return @c FALSE if the change is allowed, otherwise @c TRUE. +*/ +static bool check_sql_log_bin(sys_var *self, THD *thd, set_var *var) +{ + if (check_session_only_variable(self, thd, var)) + return true; + + if (unlikely(error_if_in_trans_or_substatement(thd, + ER_STORED_FUNCTION_PREVENTS_SWITCH_SQL_LOG_BIN, + ER_INSIDE_TRANSACTION_PREVENTS_SWITCH_SQL_LOG_BIN))) + return true; + + return false; +} + +static Sys_var_on_access<Sys_var_mybool, + PRIV_SET_SYSTEM_VAR_SQL_LOG_BIN, + PRIV_SET_SYSTEM_VAR_SQL_LOG_BIN> +Sys_sql_log_bin( + "sql_log_bin", "If set to 0 (1 is the default), no logging to the binary " + "log is done for the client. Only clients with the SUPER privilege can " + "update this variable. Can have unintended consequences if set globally, " + "see SET SQL_LOG_BIN. Starting MariaDB 10.1.7, this variable does not " + "affect the replication of events in a Galera cluster.", + SESSION_VAR(sql_log_bin), NO_CMD_LINE, DEFAULT(TRUE), + NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_sql_log_bin), + ON_UPDATE(fix_sql_log_bin_after_update)); + +static Sys_var_bit Sys_sql_warnings( + "sql_warnings", "If set to 1, single-row INSERTs will produce a string " + "containing warning information if a warning occurs.", + SESSION_VAR(option_bits), NO_CMD_LINE, OPTION_WARNINGS, + DEFAULT(FALSE)); + +static Sys_var_bit Sys_sql_notes( + "sql_notes", + "If set to 1, the default, warning_count is incremented " + "each time a Note warning is encountered. If set to 0, Note warnings " + "are not recorded. mysqldump has outputs to set this variable to 0 so " + "that no unnecessary increments occur when data is reloaded. " + "See also note_verbosity, which allows one to define with notes are " + "sent.", + SESSION_VAR(option_bits), NO_CMD_LINE, OPTION_SQL_NOTES, + DEFAULT(TRUE)); + +static Sys_var_bit Sys_auto_is_null( + "sql_auto_is_null", "If set to 1, the query SELECT * FROM table_name WHERE " + "auto_increment_column IS NULL will return an auto-increment that has just " + "been successfully inserted, the same as the LAST_INSERT_ID() function. Some" + " ODBC programs make use of this IS NULL comparison.", + SESSION_VAR(option_bits), NO_CMD_LINE, OPTION_AUTO_IS_NULL, + DEFAULT(FALSE), NO_MUTEX_GUARD, IN_BINLOG); + +static Sys_var_bit Sys_if_exists( + "sql_if_exists", "If set to 1 adds an implicate IF EXISTS to ALTER, RENAME and DROP of TABLES, VIEWS, FUNCTIONS and PACKAGES", + SESSION_VAR(option_bits), NO_CMD_LINE, OPTION_IF_EXISTS, + DEFAULT(FALSE), NO_MUTEX_GUARD, IN_BINLOG); + +static Sys_var_bit Sys_safe_updates( + "sql_safe_updates", "If set to 1, UPDATEs and DELETEs need either a key in " + "the WHERE clause, or a LIMIT clause, or else they will aborted. Prevents " + "the common mistake of accidentally deleting or updating every row in a table.", + SESSION_VAR(option_bits), CMD_LINE(OPT_ARG), OPTION_SAFE_UPDATES, + DEFAULT(FALSE)); + +static Sys_var_bit Sys_buffer_results( + "sql_buffer_result", "If set to 1 (0 is default), results from SELECT " + "statements are always placed into temporary tables. This can help the " + "server when it takes a long time to send the results to the client by " + "allowing the table locks to be freed early.", + SESSION_VAR(option_bits), NO_CMD_LINE, OPTION_BUFFER_RESULT, + DEFAULT(FALSE)); + +static Sys_var_bit Sys_quote_show_create( + "sql_quote_show_create", "If set to 1, the default, the server will " + "quote identifiers for SHOW CREATE DATABASE, SHOW CREATE TABLE and " + "SHOW CREATE VIEW statements. Quoting is disabled if set to 0. Enable " + "to ensure replications works when identifiers require quoting.", + SESSION_VAR(option_bits), NO_CMD_LINE, OPTION_QUOTE_SHOW_CREATE, + DEFAULT(TRUE)); + +static Sys_var_bit Sys_foreign_key_checks( + "foreign_key_checks", "If set to 1 (the default) foreign key constraints" + " (including ON UPDATE and ON DELETE behavior) InnoDB tables are checked," + " while if set to 0, they are not checked. 0 is not recommended for normal " + "use, though it can be useful in situations where you know the data is " + "consistent, but want to reload data in a different order from that that " + "specified by parent/child relationships. Setting this variable to 1 does " + "not retrospectively check for inconsistencies introduced while set to 0.", + SESSION_VAR(option_bits), NO_CMD_LINE, + REVERSE(OPTION_NO_FOREIGN_KEY_CHECKS), + DEFAULT(TRUE), NO_MUTEX_GUARD, IN_BINLOG); + +static Sys_var_bit Sys_unique_checks( + "unique_checks", "If set to 1, the default, secondary indexes in InnoDB " + "tables are performed. If set to 0, storage engines can (but are not " + "required to) assume that duplicate keys are not present in input data. " + "Set to 0 to speed up imports of large tables to InnoDB. The storage " + "engine will still issue a duplicate key error if it detects one, even " + "if set to 0.", + SESSION_VAR(option_bits), NO_CMD_LINE, + REVERSE(OPTION_RELAXED_UNIQUE_CHECKS), + DEFAULT(TRUE), NO_MUTEX_GUARD, IN_BINLOG); + +static Sys_var_bit Sys_no_check_constraint( + "check_constraint_checks", "check_constraint_checks", + SESSION_VAR(option_bits), NO_CMD_LINE, + REVERSE(OPTION_NO_CHECK_CONSTRAINT_CHECKS), + DEFAULT(TRUE), NO_MUTEX_GUARD, IN_BINLOG); + +#ifdef ENABLED_PROFILING +static bool update_profiling(sys_var *self, THD *thd, enum_var_type type) +{ + if (type == OPT_SESSION) + thd->profiling.reset(); + return false; +} + +static Sys_var_bit Sys_profiling( + "profiling", "If set to 1 (0 is default), statement profiling will be " + "enabled. See SHOW PROFILES and SHOW PROFILE.", + NO_SET_STMT SESSION_VAR(option_bits), NO_CMD_LINE, OPTION_PROFILING, + DEFAULT(FALSE), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(0), + ON_UPDATE(update_profiling)); + +static Sys_var_ulong Sys_profiling_history_size( + "profiling_history_size", "Number of statements about which profiling " + "information is maintained. If set to 0, no profiles are stored. " + "See SHOW PROFILES.", + NO_SET_STMT SESSION_VAR(profiling_history_size), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(0, 100), DEFAULT(15), BLOCK_SIZE(1)); +#endif + +/* + When this is set by a connection, binlogged events will be marked with a + corresponding flag. The slave can be configured to not replicate events + so marked. + In the binlog dump thread on the master, this variable is re-used for a + related purpose: The slave sets this flag when connecting to the master to + request that the master filter out (ie. not send) any events with the flag + set, thus saving network traffic on events that would be ignored by the + slave anyway. +*/ +static bool check_skip_replication(sys_var *self, THD *thd, set_var *var) +{ + /* + We must not change @@skip_replication in the middle of a transaction or + statement, as that could result in only part of the transaction / statement + being replicated. + (This would be particularly serious if we were to replicate eg. + Rows_log_event without Table_map_log_event or transactional updates without + the COMMIT). + */ + if (unlikely(error_if_in_trans_or_substatement(thd, + ER_STORED_FUNCTION_PREVENTS_SWITCH_SKIP_REPLICATION, + ER_INSIDE_TRANSACTION_PREVENTS_SWITCH_SKIP_REPLICATION))) + return 1; + + return 0; +} + +static Sys_var_bit Sys_skip_replication( + "skip_replication", "Changes are logged into the binary log with the " + "@@skip_replication flag set. Such events will not be replicated by " + "slaves that run with --replicate-events-marked-for-skip set different " + "from its default of REPLICATE. See Selectively skipping replication " + "of binlog events for more information.", + NO_SET_STMT SESSION_ONLY(option_bits), + NO_CMD_LINE, OPTION_SKIP_REPLICATION, + DEFAULT(FALSE), NO_MUTEX_GUARD, NOT_IN_BINLOG, + ON_CHECK(check_skip_replication)); + +static Sys_var_harows Sys_select_limit( + "sql_select_limit", + "The maximum number of rows to return from SELECT statements", + SESSION_VAR(select_limit), NO_CMD_LINE, + VALID_RANGE(0, HA_POS_ERROR), DEFAULT(HA_POS_ERROR), BLOCK_SIZE(1)); + +static const char *secure_timestamp_levels[]= {"NO", "SUPER", "REPLICATION", "YES", 0}; + +bool is_set_timestamp_forbidden(THD *thd) +{ + switch (opt_secure_timestamp) { + case SECTIME_NO: + return false; + case SECTIME_SUPER: + return check_global_access(thd, SUPER_ACL | BINLOG_REPLAY_ACL); + case SECTIME_REPL: + return check_global_access(thd, BINLOG_REPLAY_ACL); + case SECTIME_YES: + break; + } + char buf[1024]; + strxnmov(buf, sizeof(buf), "--secure-timestamp=", + secure_timestamp_levels[opt_secure_timestamp], NULL); + my_error(ER_OPTION_PREVENTS_STATEMENT, MYF(0), buf); + return true; +} + +bool Sys_var_timestamp::on_check_access_session(THD *thd) const +{ + return is_set_timestamp_forbidden(thd); +} +static Sys_var_timestamp Sys_timestamp( + "timestamp", "Set the time for this client", + sys_var::ONLY_SESSION, NO_CMD_LINE, + VALID_RANGE(0, TIMESTAMP_MAX_VALUE), + NO_MUTEX_GUARD, IN_BINLOG); + +static bool update_last_insert_id(THD *thd, set_var *var) +{ + if (!var->value) + { + my_error(ER_NO_DEFAULT, MYF(0), var->var->name.str); + return true; + } + thd->first_successful_insert_id_in_prev_stmt= + var->save_result.ulonglong_value; + return false; +} +static ulonglong read_last_insert_id(THD *thd) +{ + return (ulonglong) thd->read_first_successful_insert_id_in_prev_stmt(); +} +static Sys_var_session_special Sys_last_insert_id( + "last_insert_id", "The value to be returned from LAST_INSERT_ID()", + sys_var::ONLY_SESSION, NO_CMD_LINE, + VALID_RANGE(0, ULONGLONG_MAX), BLOCK_SIZE(1), + NO_MUTEX_GUARD, IN_BINLOG, ON_CHECK(0), + ON_UPDATE(update_last_insert_id), ON_READ(read_last_insert_id)); + +// alias for last_insert_id(), Sybase-style +static Sys_var_session_special Sys_identity( + "identity", "Synonym for the last_insert_id variable", + sys_var::ONLY_SESSION, NO_CMD_LINE, + VALID_RANGE(0, ULONGLONG_MAX), BLOCK_SIZE(1), + NO_MUTEX_GUARD, IN_BINLOG, ON_CHECK(0), + ON_UPDATE(update_last_insert_id), ON_READ(read_last_insert_id)); + +/* + insert_id should *not* be marked as written to the binlog (i.e., it + should *not* be IN_BINLOG), because we want any statement that + refers to insert_id explicitly to be unsafe. (By "explicitly", we + mean using @@session.insert_id, whereas insert_id is used + "implicitly" when NULL value is inserted into an auto_increment + column). + + We want statements referring explicitly to @@session.insert_id to be + unsafe, because insert_id is modified internally by the slave sql + thread when NULL values are inserted in an AUTO_INCREMENT column. + This modification interfers with the value of the + @@session.insert_id variable if @@session.insert_id is referred + explicitly by an insert statement (as is seen by executing "SET + @@session.insert_id=0; CREATE TABLE t (a INT, b INT KEY + AUTO_INCREMENT); INSERT INTO t(a) VALUES (@@session.insert_id);" in + statement-based logging mode: t will be different on master and + slave). +*/ +static bool update_insert_id(THD *thd, set_var *var) +{ + /* + If we set the insert_id to the DEFAULT or 0 + it means we 'reset' it so it's value doesn't + affect the INSERT. + */ + if (!var->value || + var->save_result.ulonglong_value == 0) + thd->auto_inc_intervals_forced.empty(); + else + thd->force_one_auto_inc_interval(var->save_result.ulonglong_value); + return false; +} + +static ulonglong read_insert_id(THD *thd) +{ + return thd->auto_inc_intervals_forced.minimum(); +} + + +static Sys_var_session_special Sys_insert_id( + "insert_id", "The value to be used by the following INSERT " + "or ALTER TABLE statement when inserting an AUTO_INCREMENT value", + sys_var::ONLY_SESSION, NO_CMD_LINE, + VALID_RANGE(0, ULONGLONG_MAX), BLOCK_SIZE(1), + NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(0), + ON_UPDATE(update_insert_id), ON_READ(read_insert_id)); + +static bool update_rand_seed1(THD *thd, set_var *var) +{ + if (!var->value) + { + my_error(ER_NO_DEFAULT, MYF(0), var->var->name.str); + return true; + } + thd->rand.seed1= (ulong) var->save_result.ulonglong_value; + return false; +} +static ulonglong read_rand_seed1(THD *thd) +{ + return thd->rand.seed1; +} +static Sys_var_session_special Sys_rand_seed1( + "rand_seed1", "Sets the internal state of the RAND() " + "generator for replication purposes", + sys_var::ONLY_SESSION, NO_CMD_LINE, + VALID_RANGE(0, ULONG_MAX), BLOCK_SIZE(1), + NO_MUTEX_GUARD, IN_BINLOG, ON_CHECK(0), + ON_UPDATE(update_rand_seed1), ON_READ(read_rand_seed1)); + +static bool update_rand_seed2(THD *thd, set_var *var) +{ + if (!var->value) + { + my_error(ER_NO_DEFAULT, MYF(0), var->var->name.str); + return true; + } + thd->rand.seed2= (ulong) var->save_result.ulonglong_value; + return false; +} +static ulonglong read_rand_seed2(THD *thd) +{ + return thd->rand.seed2; +} +static Sys_var_session_special Sys_rand_seed2( + "rand_seed2", "Sets the internal state of the RAND() " + "generator for replication purposes", + sys_var::ONLY_SESSION, NO_CMD_LINE, + VALID_RANGE(0, ULONG_MAX), BLOCK_SIZE(1), + NO_MUTEX_GUARD, IN_BINLOG, ON_CHECK(0), + ON_UPDATE(update_rand_seed2), ON_READ(read_rand_seed2)); + +static ulonglong read_error_count(THD *thd) +{ + return thd->get_stmt_da()->error_count(); +} +// this really belongs to the SHOW STATUS +static Sys_var_session_special Sys_error_count( + "error_count", "The number of errors that resulted from the " + "last statement that generated messages", + READ_ONLY sys_var::ONLY_SESSION, NO_CMD_LINE, + VALID_RANGE(0, ULONGLONG_MAX), BLOCK_SIZE(1), NO_MUTEX_GUARD, + NOT_IN_BINLOG, ON_CHECK(0), ON_UPDATE(0), ON_READ(read_error_count)); + +static ulonglong read_warning_count(THD *thd) +{ + return thd->get_stmt_da()->warn_count(); +} +// this really belongs to the SHOW STATUS +static Sys_var_session_special Sys_warning_count( + "warning_count", "The number of errors, warnings, and notes " + "that resulted from the last statement that generated messages", + READ_ONLY sys_var::ONLY_SESSION, NO_CMD_LINE, + VALID_RANGE(0, ULONGLONG_MAX), BLOCK_SIZE(1), NO_MUTEX_GUARD, + NOT_IN_BINLOG, ON_CHECK(0), ON_UPDATE(0), ON_READ(read_warning_count)); + +static Sys_var_ulong Sys_default_week_format( + "default_week_format", + "The default week format used by WEEK() functions", + SESSION_VAR(default_week_format), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(0, 7), DEFAULT(0), BLOCK_SIZE(1)); + +static Sys_var_uint Sys_group_concat_max_len( + "group_concat_max_len", + "The maximum length of the result of function GROUP_CONCAT()", + SESSION_VAR(group_concat_max_len), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(4, UINT_MAX32), DEFAULT(1024*1024), BLOCK_SIZE(1)); + +static char *glob_hostname_ptr; +static Sys_var_charptr Sys_hostname( + "hostname", "Server host name", + READ_ONLY GLOBAL_VAR(glob_hostname_ptr), NO_CMD_LINE, + DEFAULT(glob_hostname)); + +#ifndef EMBEDDED_LIBRARY +static Sys_var_charptr Sys_repl_report_host( + "report_host", + "Hostname or IP of the slave to be reported to the master during " + "slave registration. Will appear in the output of SHOW SLAVE HOSTS. " + "Leave unset if you do not want the slave to register itself with the " + "master. Note that it is not sufficient for the master to simply read " + "the IP of the slave off the socket once the slave connects. Due to " + "NAT and other routing issues, that IP may not be valid for connecting " + "to the slave from the master or other hosts", + READ_ONLY GLOBAL_VAR(report_host), CMD_LINE(REQUIRED_ARG), + DEFAULT(0)); + +static Sys_var_charptr Sys_repl_report_user( + "report_user", + "The account user name of the slave to be reported to the master " + "during slave registration", + READ_ONLY GLOBAL_VAR(report_user), CMD_LINE(REQUIRED_ARG), + DEFAULT(0)); + +static Sys_var_charptr Sys_repl_report_password( + "report_password", + "The account password of the slave to be reported to the master " + "during slave registration", + READ_ONLY GLOBAL_VAR(report_password), CMD_LINE(REQUIRED_ARG), + DEFAULT(0)); + +static Sys_var_uint Sys_repl_report_port( + "report_port", + "Port for connecting to slave reported to the master during slave " + "registration. Set it only if the slave is listening on a non-default " + "port or if you have a special tunnel from the master or other clients " + "to the slave. If not sure, leave this option unset", + READ_ONLY GLOBAL_VAR(report_port), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(0, UINT_MAX), DEFAULT(0), BLOCK_SIZE(1)); +#endif + +static Sys_var_mybool Sys_keep_files_on_create( + "keep_files_on_create", + "Don't overwrite stale .MYD and .MYI even if no directory is specified", + SESSION_VAR(keep_files_on_create), CMD_LINE(OPT_ARG), + DEFAULT(FALSE), + NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(0), ON_UPDATE(0), + DEPRECATED("")); // since 10.8.0 + +static char *license; +static Sys_var_charptr Sys_license( + "license", "The type of license the server has", + READ_ONLY GLOBAL_VAR(license), NO_CMD_LINE, + DEFAULT(STRINGIFY_ARG(LICENSE))); + +#include <proxy_protocol.h> +char *my_proxy_protocol_networks; +static bool check_proxy_protocol_networks(sys_var *, THD *, set_var *var) +{ + if (!var->value) + return false; + return !proxy_protocol_networks_valid(var->save_result.string_value.str); +} + + +static bool fix_proxy_protocol_networks(sys_var *, THD *, enum_var_type) +{ + return (bool)set_proxy_protocol_networks(my_proxy_protocol_networks); +} + + +static Sys_var_on_access_global<Sys_var_charptr_fscs, + PRIV_SET_SYSTEM_GLOBAL_VAR_PROXY_PROTOCOL_NETWORKS> +Sys_proxy_protocol_networks( + "proxy_protocol_networks", "Enable proxy protocol for these source " + "networks. The syntax is a comma separated list of IPv4 and IPv6 " + "networks. If the network doesn't contain mask, it is considered to be " + "a single host. \"*\" represents all networks and must the only " + "directive on the line. String \"localhost\" represents non-TCP " + "local connections (Unix domain socket, Windows named pipe or shared memory).", + GLOBAL_VAR(my_proxy_protocol_networks), CMD_LINE(REQUIRED_ARG), + DEFAULT(""), NO_MUTEX_GUARD, NOT_IN_BINLOG, + ON_CHECK(check_proxy_protocol_networks), ON_UPDATE(fix_proxy_protocol_networks)); + + +static bool check_log_path(sys_var *self, THD *thd, set_var *var) +{ + if (!var->value) + return false; // DEFAULT is ok + + if (!var->save_result.string_value.str) + return true; + + LEX_STRING *val= &var->save_result.string_value; + + if (val->length > FN_REFLEN) + { // path is too long + my_error(ER_PATH_LENGTH, MYF(0), self->name.str); + return true; + } + + char path[FN_REFLEN]; + size_t path_length= unpack_filename(path, val->str); + + if (!path_length) + return true; + + if (!is_filename_allowed(var->save_result.string_value.str, + var->save_result.string_value.length, TRUE)) + { + my_error(ER_WRONG_VALUE_FOR_VAR, MYF(0), + self->name.str, var->save_result.string_value.str); + return true; + } + + static const LEX_CSTRING my_cnf= { STRING_WITH_LEN("my.cnf") }; + static const LEX_CSTRING my_ini= { STRING_WITH_LEN("my.ini") }; + if (path_length >= my_cnf.length) + { + if (strcasecmp(path + path_length - my_cnf.length, my_cnf.str) == 0) + return true; // log file name ends with "my.cnf" + DBUG_ASSERT(my_cnf.length == my_ini.length); + if (strcasecmp(path + path_length - my_ini.length, my_ini.str) == 0) + return true; // log file name ends with "my.ini" + } + + MY_STAT f_stat; + + if (my_stat(path, &f_stat, MYF(0))) + { + if (!MY_S_ISREG(f_stat.st_mode) || !(f_stat.st_mode & MY_S_IWRITE)) + return true; // not a regular writable file + return false; + } + + (void) dirname_part(path, val->str, &path_length); + + if (val->length - path_length >= FN_LEN) + { // filename is too long + my_error(ER_PATH_LENGTH, MYF(0), self->name.str); + return true; + } + + if (!path_length) // no path is good path (remember, relative to datadir) + return false; + + if (my_access(path, (F_OK|W_OK))) + return true; // directory is not writable + + return false; +} +static bool fix_log(char** logname, const char* default_logname, + const char*ext, bool enabled, void (*reopen)(char*)) +{ + if (!*logname) // SET ... = DEFAULT + { + make_default_log_name(logname, ext, false); + if (!*logname) + return true; + } + logger.lock_exclusive(); + mysql_mutex_unlock(&LOCK_global_system_variables); + if (enabled) + reopen(*logname); + logger.unlock(); + mysql_mutex_lock(&LOCK_global_system_variables); + return false; +} +static void reopen_general_log(char* name) +{ + logger.get_log_file_handler()->close(0); + logger.get_log_file_handler()->open_query_log(name); +} +static bool fix_general_log_file(sys_var *self, THD *thd, enum_var_type type) +{ + return fix_log(&opt_logname, opt_log_basename, ".log", opt_log, + reopen_general_log); +} +static Sys_var_charptr_fscs Sys_general_log_path( + "general_log_file", "Log connections and queries to given file", + PREALLOCATED GLOBAL_VAR(opt_logname), CMD_LINE(REQUIRED_ARG), + DEFAULT(0), NO_MUTEX_GUARD, NOT_IN_BINLOG, + ON_CHECK(check_log_path), ON_UPDATE(fix_general_log_file)); + +static void reopen_slow_log(char* name) +{ + logger.get_slow_log_file_handler()->close(0); + logger.get_slow_log_file_handler()->open_slow_log(name); +} +static bool fix_slow_log_file(sys_var *self, THD *thd, enum_var_type type) +{ + return fix_log(&opt_slow_logname, opt_log_basename, "-slow.log", + global_system_variables.sql_log_slow, reopen_slow_log); +} + +static Sys_var_charptr_fscs Sys_slow_log_path( + "slow_query_log_file", + "Alias for log_slow_query_file. " + "Log slow queries to given log file. " + "Defaults logging to 'hostname'-slow.log. Must be enabled to activate " + "other slow log options", + PREALLOCATED GLOBAL_VAR(opt_slow_logname), CMD_LINE(REQUIRED_ARG), + DEFAULT(0), NO_MUTEX_GUARD, NOT_IN_BINLOG, + ON_CHECK(check_log_path), ON_UPDATE(fix_slow_log_file)); + +static Sys_var_charptr_fscs Sys_log_slow_query_file_name( + "log_slow_query_file", "Log slow queries to given log file. " + "Defaults logging to 'hostname'-slow.log. Must be enabled to activate " + "other slow log options", + PREALLOCATED GLOBAL_VAR(opt_slow_logname), CMD_LINE(REQUIRED_ARG), + DEFAULT(0), NO_MUTEX_GUARD, NOT_IN_BINLOG, + ON_CHECK(check_log_path), ON_UPDATE(fix_slow_log_file)); + +static Sys_var_have Sys_have_compress( + "have_compress", "If the zlib compression library is accessible to the " + "server, this will be set to YES, otherwise it will be NO. The COMPRESS() " + "and UNCOMPRESS() functions will only be available if set to YES.", + READ_ONLY GLOBAL_VAR(have_compress), NO_CMD_LINE); + +static Sys_var_have Sys_have_crypt( + "have_crypt", "If the crypt() system call is available this variable will " + "be set to YES, otherwise it will be set to NO. If set to NO, the " + "ENCRYPT() function cannot be used.", + READ_ONLY GLOBAL_VAR(have_crypt), NO_CMD_LINE); + +static Sys_var_have Sys_have_dlopen( + "have_dynamic_loading", "If the server supports dynamic loading of plugins, " + "will be set to YES, otherwise will be set to NO.", + READ_ONLY GLOBAL_VAR(have_dlopen), NO_CMD_LINE); + +static Sys_var_have Sys_have_geometry( + "have_geometry", "If the server supports spatial data types, will be set to " + "YES, otherwise will be set to NO.", + READ_ONLY GLOBAL_VAR(have_geometry), NO_CMD_LINE); + +static Sys_var_have Sys_have_openssl( + "have_openssl", "Comparing have_openssl with have_ssl will indicate whether " + "YaSSL or openssl was used. If YaSSL, have_ssl will be YES, but have_openssl " + "will be NO.", + READ_ONLY GLOBAL_VAR(have_openssl), NO_CMD_LINE); + +static Sys_var_have Sys_have_profiling( + "have_profiling", "If statement profiling is available, will be set to YES, " + "otherwise will be set to NO. See SHOW PROFILES and SHOW PROFILE.", + READ_ONLY GLOBAL_VAR(have_profiling), NO_CMD_LINE); + +static Sys_var_have Sys_have_query_cache( + "have_query_cache", "If the server supports the query cache, will be set to " + "YES, otherwise will be set to NO.", + READ_ONLY GLOBAL_VAR(have_query_cache), NO_CMD_LINE); + +static Sys_var_have Sys_have_rtree_keys( + "have_rtree_keys", "If RTREE indexes (used for spatial indexes) " + "are available, will be set to YES, otherwise will be set to NO.", + READ_ONLY GLOBAL_VAR(have_rtree_keys), NO_CMD_LINE); + +static Sys_var_have Sys_have_ssl( + "have_ssl", "If the server supports secure connections, will be set to YES, " + "otherwise will be set to NO. If set to DISABLED, the server was compiled with " + "TLS support, but was not started with TLS support (see the mysqld options). " + "See also have_openssl.", + READ_ONLY GLOBAL_VAR(have_ssl), NO_CMD_LINE); + +static Sys_var_have Sys_have_symlink( + "have_symlink", "If symbolic link support is enabled, will be set to YES, " + "otherwise will be set to NO. Required for the INDEX DIRECTORY and DATA " + "DIRECTORY table options (see CREATE TABLE) and Windows symlink support. " + "Will be set to DISABLED if the server is started with the " + "--skip-symbolic-links option.", + READ_ONLY GLOBAL_VAR(have_symlink), NO_CMD_LINE); + +#if defined __SANITIZE_ADDRESS__ || defined WITH_UBSAN || __has_feature(memory_sanitizer) + +# ifdef __SANITIZE_ADDRESS__ +# ifdef WITH_UBSAN +# define SANITIZER_MODE "ASAN,UBSAN" +# else +# define SANITIZER_MODE "ASAN" +# endif +# elif defined WITH_UBSAN +# define SANITIZER_MODE "UBSAN" +# else +# define SANITIZER_MODE "MSAN" +# endif + +static char *have_sanitizer; +static Sys_var_charptr Sys_have_santitizer( + "have_sanitizer", + "If the server is compiled with sanitize (compiler option), this " + "variable is set to the sanitizer mode used. Possible values are " + "ASAN (Address sanitizer) or UBSAN (The Undefined Behavior Sanitizer).", + READ_ONLY GLOBAL_VAR(have_sanitizer), NO_CMD_LINE, + DEFAULT(SANITIZER_MODE)); +#endif /* defined(__SANITIZE_ADDRESS__) || defined(WITH_UBSAN) */ + +static bool fix_log_state(sys_var *self, THD *thd, enum_var_type type); + +static Sys_var_mybool Sys_general_log( + "general_log", "Log connections and queries to a table or log file. " + "Defaults logging to a file 'hostname'.log or a table mysql.general_log" + "if --log-output=TABLE is used.", + GLOBAL_VAR(opt_log), CMD_LINE(OPT_ARG), + DEFAULT(FALSE), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(0), + ON_UPDATE(fix_log_state)); + +static Sys_var_mybool Sys_slow_query_log( + "slow_query_log", + "Alias for log_slow_query. " + "Log slow queries to a table or log file. Defaults logging to a file " + "'hostname'-slow.log or a table mysql.slow_log if --log-output=TABLE is " + "used. Must be enabled to activate other slow log options.", + SESSION_VAR(sql_log_slow), CMD_LINE(OPT_ARG), + DEFAULT(FALSE), NO_MUTEX_GUARD, NOT_IN_BINLOG, + ON_CHECK(0), ON_UPDATE(fix_log_state)); + +static Sys_var_mybool Sys_log_slow_query( + "log_slow_query", + "Log slow queries to a table or log file. Defaults logging to a file " + "'hostname'-slow.log or a table mysql.slow_log if --log-output=TABLE is " + "used. Must be enabled to activate other slow log options.", + SESSION_VAR(sql_log_slow), CMD_LINE(OPT_ARG), + DEFAULT(FALSE), NO_MUTEX_GUARD, NOT_IN_BINLOG, + ON_CHECK(0), ON_UPDATE(fix_log_state)); + +static bool fix_log_state(sys_var *self, THD *thd, enum_var_type type) +{ + bool res; + my_bool *UNINIT_VAR(newvalptr), newval, UNINIT_VAR(oldval); + uint UNINIT_VAR(log_type); + + if (type != OPT_GLOBAL) + return 0; + + if (self == &Sys_general_log) + { + newvalptr= &opt_log; + oldval= logger.get_log_file_handler()->is_open(); + log_type= QUERY_LOG_GENERAL; + } + else + { + DBUG_ASSERT(self == &Sys_slow_query_log || self == &Sys_log_slow_query); + newvalptr= &global_system_variables.sql_log_slow; + oldval= logger.get_slow_log_file_handler()->is_open(); + log_type= QUERY_LOG_SLOW; + } + + newval= *newvalptr; + if (oldval == newval) + return false; + + *newvalptr= oldval; // [de]activate_log_handler works that way (sigh) + + mysql_mutex_unlock(&LOCK_global_system_variables); + if (!newval) + { + logger.deactivate_log_handler(thd, log_type); + res= false; + } + else + res= logger.activate_log_handler(thd, log_type); + mysql_mutex_lock(&LOCK_global_system_variables); + return res; +} + + +static bool check_not_empty_set(sys_var *self, THD *thd, set_var *var) +{ + return var->save_result.ulonglong_value == 0; +} +static bool fix_log_output(sys_var *self, THD *thd, enum_var_type type) +{ + logger.lock_exclusive(); + logger.init_slow_log(log_output_options); + logger.init_general_log(log_output_options); + logger.unlock(); + return false; +} + +static const char *log_output_names[] = { "NONE", "FILE", "TABLE", NULL}; + +static Sys_var_set Sys_log_output( + "log_output", "How logs should be written", + GLOBAL_VAR(log_output_options), CMD_LINE(REQUIRED_ARG), + log_output_names, DEFAULT(LOG_FILE), NO_MUTEX_GUARD, NOT_IN_BINLOG, + ON_CHECK(check_not_empty_set), ON_UPDATE(fix_log_output)); + +#ifdef HAVE_REPLICATION +static Sys_var_mybool Sys_log_slave_updates( + "log_slave_updates", "Tells the slave to log the updates from " + "the slave thread to the binary log. You will need to turn it on if " + "you plan to daisy-chain the slaves.", + READ_ONLY GLOBAL_VAR(opt_log_slave_updates), CMD_LINE(OPT_ARG), + DEFAULT(0)); + +static Sys_var_charptr_fscs Sys_relay_log( + "relay_log", "The location and name to use for relay logs.", + READ_ONLY GLOBAL_VAR(opt_relay_logname), CMD_LINE(REQUIRED_ARG), + DEFAULT(0)); + +/* + Uses NO_CMD_LINE since the --relay-log-index option set + opt_relaylog_index_name variable and computes a value for the + relay_log_index variable. +*/ +static Sys_var_charptr_fscs Sys_relay_log_index( + "relay_log_index", "The location and name to use for the file " + "that keeps a list of the last relay logs.", + READ_ONLY GLOBAL_VAR(relay_log_index), NO_CMD_LINE, + DEFAULT(0)); + +/* + Uses NO_CMD_LINE since the --log-bin-index option set + opt_binlog_index_name variable and computes a value for the + log_bin_index variable. +*/ +static Sys_var_charptr_fscs Sys_binlog_index( + "log_bin_index", "File that holds the names for last binary log files.", + READ_ONLY GLOBAL_VAR(log_bin_index), NO_CMD_LINE, + DEFAULT(0)); + +static Sys_var_charptr_fscs Sys_relay_log_basename( + "relay_log_basename", + "The full path of the relay log file names, excluding the extension.", + READ_ONLY GLOBAL_VAR(relay_log_basename), NO_CMD_LINE, + DEFAULT(0)); + +static Sys_var_charptr_fscs Sys_log_bin_basename( + "log_bin_basename", + "The full path of the binary log file names, excluding the extension.", + READ_ONLY GLOBAL_VAR(log_bin_basename), NO_CMD_LINE, + DEFAULT(0)); + +static Sys_var_charptr_fscs Sys_relay_log_info_file( + "relay_log_info_file", "The location and name of the file that " + "remembers where the SQL replication thread is in the relay logs.", + READ_ONLY GLOBAL_VAR(relay_log_info_file), CMD_LINE(REQUIRED_ARG), + DEFAULT(0)); + +static Sys_var_on_access_global<Sys_var_mybool, + PRIV_SET_SYSTEM_GLOBAL_VAR_RELAY_LOG_PURGE> +Sys_relay_log_purge( + "relay_log_purge", "if disabled - do not purge relay logs. " + "if enabled - purge them as soon as they are no more needed.", + GLOBAL_VAR(relay_log_purge), CMD_LINE(OPT_ARG), DEFAULT(TRUE)); + +static Sys_var_on_access_global<Sys_var_mybool, + PRIV_SET_SYSTEM_GLOBAL_VAR_RELAY_LOG_RECOVERY> +Sys_relay_log_recovery( + "relay_log_recovery", "Enables automatic relay log recovery " + "right after the database startup, which means that the IO Thread " + "starts re-fetching from the master right after the last transaction " + "processed.", + GLOBAL_VAR(relay_log_recovery), CMD_LINE(OPT_ARG), DEFAULT(FALSE)); + + +bool Sys_var_rpl_filter::global_update(THD *thd, set_var *var) +{ + bool result= true; // Assume error + LEX_CSTRING *base_name= &var->base; + + if (!base_name->length) + base_name= &thd->variables.default_master_connection; + + mysql_mutex_unlock(&LOCK_global_system_variables); + + if (Master_info *mi= get_master_info(base_name, !var->base.length ? + Sql_condition::WARN_LEVEL_ERROR : + Sql_condition::WARN_LEVEL_WARN)) + { + if (mi->rli.slave_running) + { + my_error(ER_SLAVE_MUST_STOP, MYF(0), + (int) mi->connection_name.length, + mi->connection_name.str); + result= true; + } + else + { + result= set_filter_value(var->save_result.string_value.str, mi); + } + mi->release(); + } + + mysql_mutex_lock(&LOCK_global_system_variables); + return result; +} + +bool Sys_var_rpl_filter::set_filter_value(const char *value, Master_info *mi) +{ + bool status= true; + Rpl_filter* rpl_filter= mi->rpl_filter; + + /* Proctect against other threads */ + mysql_mutex_lock(&LOCK_active_mi); + switch (opt_id) { + case OPT_REPLICATE_REWRITE_DB: + status= rpl_filter->set_rewrite_db(value); + break; + case OPT_REPLICATE_DO_DB: + status= rpl_filter->set_do_db(value); + break; + case OPT_REPLICATE_DO_TABLE: + status= rpl_filter->set_do_table(value); + break; + case OPT_REPLICATE_IGNORE_DB: + status= rpl_filter->set_ignore_db(value); + break; + case OPT_REPLICATE_IGNORE_TABLE: + status= rpl_filter->set_ignore_table(value); + break; + case OPT_REPLICATE_WILD_DO_TABLE: + status= rpl_filter->set_wild_do_table(value); + break; + case OPT_REPLICATE_WILD_IGNORE_TABLE: + status= rpl_filter->set_wild_ignore_table(value); + break; + } + mysql_mutex_unlock(&LOCK_active_mi); + return status; +} + +const uchar * +Sys_var_rpl_filter::global_value_ptr(THD *thd, + const LEX_CSTRING *base_name) const +{ + char buf[256]; + String tmp(buf, sizeof(buf), &my_charset_bin); + uchar *ret; + Master_info *mi; + Rpl_filter *rpl_filter; + + mysql_mutex_unlock(&LOCK_global_system_variables); + mi= get_master_info(base_name, !base_name->length ? + Sql_condition::WARN_LEVEL_ERROR : + Sql_condition::WARN_LEVEL_WARN); + + if (!mi) + { + mysql_mutex_lock(&LOCK_global_system_variables); + return 0; + } + + rpl_filter= mi->rpl_filter; + + mysql_mutex_lock(&LOCK_active_mi); + switch (opt_id) { + case OPT_REPLICATE_REWRITE_DB: + rpl_filter->get_rewrite_db(&tmp); + break; + case OPT_REPLICATE_DO_DB: + rpl_filter->get_do_db(&tmp); + break; + case OPT_REPLICATE_DO_TABLE: + rpl_filter->get_do_table(&tmp); + break; + case OPT_REPLICATE_IGNORE_DB: + rpl_filter->get_ignore_db(&tmp); + break; + case OPT_REPLICATE_IGNORE_TABLE: + rpl_filter->get_ignore_table(&tmp); + break; + case OPT_REPLICATE_WILD_DO_TABLE: + rpl_filter->get_wild_do_table(&tmp); + break; + case OPT_REPLICATE_WILD_IGNORE_TABLE: + rpl_filter->get_wild_ignore_table(&tmp); + break; + } + mysql_mutex_unlock(&LOCK_active_mi); + mysql_mutex_lock(&LOCK_global_system_variables); + + mi->release(); + + ret= (uchar *) thd->strmake(tmp.ptr(), tmp.length()); + + return ret; +} + +static Sys_var_rpl_filter Sys_replicate_do_db( + "replicate_do_db", OPT_REPLICATE_DO_DB, + "Tell the slave to restrict replication to updates of tables " + "whose names appear in the comma-separated list. For " + "statement-based replication, only the default database (that " + "is, the one selected by USE) is considered, not any explicitly " + "mentioned tables in the query. For row-based replication, the " + "actual names of table(s) being updated are checked.", + PRIV_SET_SYSTEM_GLOBAL_VAR_REPLICATE_DO_DB); + +static Sys_var_rpl_filter Sys_replicate_rewrite_db( + "replicate_rewrite_db", OPT_REPLICATE_REWRITE_DB, + "Tells the slave to replicate binlog events " + "into a different database than their original target on the master." + "Example: replicate-rewrite-db=master_db_name->slave_db_name.", + PRIV_SET_SYSTEM_GLOBAL_VAR_REPLICATE_REWRITE_DB); + +static Sys_var_rpl_filter Sys_replicate_do_table( + "replicate_do_table", OPT_REPLICATE_DO_TABLE, + "Tells the slave to restrict replication to tables in the " + "comma-separated list.", + PRIV_SET_SYSTEM_GLOBAL_VAR_REPLICATE_DO_TABLE); + +static Sys_var_rpl_filter Sys_replicate_ignore_db( + "replicate_ignore_db", OPT_REPLICATE_IGNORE_DB, + "Tell the slave to restrict replication to updates of tables " + "whose names do not appear in the comma-separated list. For " + "statement-based replication, only the default database (that " + "is, the one selected by USE) is considered, not any explicitly " + "mentioned tables in the query. For row-based replication, the " + "actual names of table(s) being updated are checked.", + PRIV_SET_SYSTEM_GLOBAL_VAR_REPLICATE_IGNORE_DB); + +static Sys_var_rpl_filter Sys_replicate_ignore_table( + "replicate_ignore_table", OPT_REPLICATE_IGNORE_TABLE, + "Tells the slave thread not to replicate any statement that " + "updates the specified table, even if any other tables might be " + "updated by the same statement.", + PRIV_SET_SYSTEM_GLOBAL_VAR_REPLICATE_IGNORE_TABLE); + +static Sys_var_rpl_filter Sys_replicate_wild_do_table( + "replicate_wild_do_table", OPT_REPLICATE_WILD_DO_TABLE, + "Tells the slave thread to restrict replication to statements " + "where any of the updated tables match the specified database " + "and table name patterns.", + PRIV_SET_SYSTEM_GLOBAL_VAR_REPLICATE_WILD_DO_TABLE); + +static Sys_var_rpl_filter Sys_replicate_wild_ignore_table( + "replicate_wild_ignore_table", OPT_REPLICATE_WILD_IGNORE_TABLE, + "Tells the slave thread to not replicate to the tables that " + "match the given wildcard pattern.", + PRIV_SET_SYSTEM_GLOBAL_VAR_REPLICATE_WILD_IGNORE_TABLE); + +static Sys_var_charptr_fscs Sys_slave_load_tmpdir( + "slave_load_tmpdir", "The location where the slave should put " + "its temporary files when replicating a LOAD DATA INFILE command", + READ_ONLY GLOBAL_VAR(slave_load_tmpdir), CMD_LINE(REQUIRED_ARG), + DEFAULT(0)); + +static Sys_var_on_access_global<Sys_var_uint, + PRIV_SET_SYSTEM_GLOBAL_VAR_SLAVE_NET_TIMEOUT> +Sys_slave_net_timeout( + "slave_net_timeout", "Number of seconds to wait for more data " + "from any master/slave connection before aborting the read", + GLOBAL_VAR(slave_net_timeout), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(1, LONG_TIMEOUT), DEFAULT(SLAVE_NET_TIMEOUT), BLOCK_SIZE(1)); + + +/* + Access a multi_source variable + Return 0 + warning if it doesn't exist +*/ + +ulonglong Sys_var_multi_source_ulonglong:: +get_master_info_ulonglong_value(THD *thd, ptrdiff_t offset) const +{ + Master_info *mi; + ulonglong res= 0; // Default value + mysql_mutex_unlock(&LOCK_global_system_variables); + if ((mi= get_master_info(&thd->variables.default_master_connection, + Sql_condition::WARN_LEVEL_WARN))) + { + res= *((ulonglong*) (((uchar*) mi) + master_info_offset)); + mi->release(); + } + mysql_mutex_lock(&LOCK_global_system_variables); + return res; +} + + +bool update_multi_source_variable(sys_var *self_var, THD *thd, + enum_var_type type) +{ + Sys_var_multi_source_ulonglong *self= (Sys_var_multi_source_ulonglong*) self_var; + bool result= true; + Master_info *mi; + + if (type == OPT_GLOBAL) + mysql_mutex_unlock(&LOCK_global_system_variables); + if ((mi= (get_master_info(&thd->variables.default_master_connection, + Sql_condition::WARN_LEVEL_ERROR)))) + { + mysql_mutex_lock(&mi->rli.run_lock); + mysql_mutex_lock(&mi->rli.data_lock); + result= self->update_variable(thd, mi); + mysql_mutex_unlock(&mi->rli.data_lock); + mysql_mutex_unlock(&mi->rli.run_lock); + mi->release(); + } + if (type == OPT_GLOBAL) + mysql_mutex_lock(&LOCK_global_system_variables); + return result; +} + +static bool update_slave_skip_counter(sys_var *self, THD *thd, Master_info *mi) +{ + if (mi->rli.slave_running) + { + my_error(ER_SLAVE_MUST_STOP, MYF(0), (int) mi->connection_name.length, + mi->connection_name.str); + return true; + } + if (mi->using_gtid != Master_info::USE_GTID_NO && mi->using_parallel()) + { + ulong domain_count; + mysql_mutex_lock(&rpl_global_gtid_slave_state->LOCK_slave_state); + domain_count= rpl_global_gtid_slave_state->count(); + mysql_mutex_unlock(&rpl_global_gtid_slave_state->LOCK_slave_state); + if (domain_count > 1) + { + /* + With domain-based parallel replication, the slave position is + multi-dimensional, so the relay log position is not very meaningful. + It might not even correspond to the next GTID to execute in _any_ + domain (the case after error stop). So slave_skip_counter will most + likely not do what the user intends. Instead give an error, with a + suggestion to instead set @@gtid_slave_pos past the point of error; + this works reliably also in the case of multiple domains. + */ + my_error(ER_SLAVE_SKIP_NOT_IN_GTID, MYF(0)); + return true; + } + } + + /* The value was stored temporarily in thd */ + mi->rli.slave_skip_counter= thd->variables.slave_skip_counter; + return false; +} + +static Sys_var_multi_source_ulonglong Sys_slave_skip_counter( + "sql_slave_skip_counter", "Skip the next N events from the master log", + SESSION_VAR(slave_skip_counter), NO_CMD_LINE, + MASTER_INFO_VAR(rli.slave_skip_counter), + VALID_RANGE(0, UINT_MAX), DEFAULT(0), BLOCK_SIZE(1), + ON_UPDATE(update_slave_skip_counter)); + +static bool update_max_relay_log_size(sys_var *self, THD *thd, Master_info *mi) +{ + mi->rli.max_relay_log_size= thd->variables.max_relay_log_size; + mi->rli.relay_log.set_max_size((ulong)mi->rli.max_relay_log_size); + return false; +} + +static Sys_var_multi_source_ulonglong Sys_max_relay_log_size( + "max_relay_log_size", + "relay log will be rotated automatically when the size exceeds this " + "value. If 0 at startup, it's set to max_binlog_size", + SESSION_VAR(max_relay_log_size), CMD_LINE(REQUIRED_ARG), + MASTER_INFO_VAR(rli.max_relay_log_size), + VALID_RANGE(0, 1024L*1024*1024), DEFAULT(0), BLOCK_SIZE(IO_SIZE), + ON_UPDATE(update_max_relay_log_size)); + +static Sys_var_charptr Sys_slave_skip_errors( + "slave_skip_errors", "Tells the slave thread to continue " + "replication when a query event returns an error from the " + "provided list", + READ_ONLY GLOBAL_VAR(opt_slave_skip_errors), CMD_LINE(REQUIRED_ARG), + DEFAULT(0)); + +static Sys_var_on_access_global<Sys_var_ulonglong, + PRIV_SET_SYSTEM_GLOBAL_VAR_READ_BINLOG_SPEED_LIMIT> +Sys_read_binlog_speed_limit( + "read_binlog_speed_limit", "Maximum speed(KB/s) to read binlog from" + " master (0 = no limit)", + GLOBAL_VAR(opt_read_binlog_speed_limit), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(0, ULONG_MAX), DEFAULT(0), BLOCK_SIZE(1)); + +static Sys_var_charptr Sys_slave_transaction_retry_errors( + "slave_transaction_retry_errors", "Tells the slave thread to retry " + "transaction for replication when a query event returns an error from " + "the provided list. Deadlock error, elapsed lock wait timeout, " + "net read error, net read timeout, net write error, net write timeout, " + "connect error and 2 types of lost connection error are automatically " + "added to this list", + READ_ONLY GLOBAL_VAR(opt_slave_transaction_retry_errors), CMD_LINE(REQUIRED_ARG), + DEFAULT(0)); + +static Sys_var_ulonglong Sys_relay_log_space_limit( + "relay_log_space_limit", "Maximum space to use for all relay logs", + READ_ONLY GLOBAL_VAR(relay_log_space_limit), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(0, ULONGLONG_MAX), DEFAULT(0), BLOCK_SIZE(1)); + +static Sys_var_on_access_global<Sys_var_uint, + PRIV_SET_SYSTEM_GLOBAL_VAR_SYNC_RELAY_LOG> +Sys_sync_relaylog_period( + "sync_relay_log", "Synchronously flush relay log to disk after " + "every #th event. Use 0 to disable synchronous flushing", + GLOBAL_VAR(sync_relaylog_period), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(0, UINT_MAX), DEFAULT(10000), BLOCK_SIZE(1)); + +static Sys_var_on_access_global<Sys_var_uint, + PRIV_SET_SYSTEM_GLOBAL_VAR_SYNC_RELAY_LOG_INFO> +Sys_sync_relayloginfo_period( + "sync_relay_log_info", "Synchronously flush relay log info " + "to disk after every #th transaction. Use 0 to disable " + "synchronous flushing", + GLOBAL_VAR(sync_relayloginfo_period), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(0, UINT_MAX), DEFAULT(10000), BLOCK_SIZE(1)); +#endif + +static Sys_var_on_access_global<Sys_var_uint, + PRIV_SET_SYSTEM_GLOBAL_VAR_SYNC_BINLOG> +Sys_sync_binlog_period( + "sync_binlog", "Synchronously flush binary log to disk after " + "every #th event. Use 0 (default) to disable synchronous flushing", + GLOBAL_VAR(sync_binlog_period), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(0, UINT_MAX), DEFAULT(0), BLOCK_SIZE(1)); + +static Sys_var_on_access_global<Sys_var_uint, + PRIV_SET_SYSTEM_GLOBAL_VAR_SYNC_MASTER_INFO> +Sys_sync_masterinfo_period( + "sync_master_info", "Synchronously flush master info to disk " + "after every #th event. Use 0 to disable synchronous flushing", + GLOBAL_VAR(sync_masterinfo_period), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(0, UINT_MAX), DEFAULT(10000), BLOCK_SIZE(1)); + +#ifdef HAVE_REPLICATION +static Sys_var_ulong Sys_slave_trans_retries( + "slave_transaction_retries", "Number of times the slave SQL " + "thread will retry a transaction in case it failed with a deadlock, " + "elapsed lock wait timeout or listed in " + "slave_transaction_retry_errors, before giving up and stopping", + GLOBAL_VAR(slave_trans_retries), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(0, UINT_MAX), DEFAULT(10), BLOCK_SIZE(1)); + +static Sys_var_on_access_global<Sys_var_ulong, + PRIV_SET_SYSTEM_GLOBAL_VAR_SLAVE_TRANSACTION_RETRY_INTERVAL> +Sys_slave_trans_retry_interval( + "slave_transaction_retry_interval", "Interval of the slave SQL " + "thread will retry a transaction in case it failed with a deadlock " + "or elapsed lock wait timeout or listed in " + "slave_transaction_retry_errors", + GLOBAL_VAR(slave_trans_retry_interval), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(0, 3600), DEFAULT(0), BLOCK_SIZE(1)); +#endif + +static bool check_locale(sys_var *self, THD *thd, set_var *var) +{ + if (!var->value) + return false; + + MY_LOCALE *locale; + char buff[STRING_BUFFER_USUAL_SIZE]; + if (var->value->result_type() == INT_RESULT) + { + int lcno= (int)var->value->val_int(); + if (!(locale= my_locale_by_number(lcno))) + { + my_error(ER_UNKNOWN_LOCALE, MYF(0), llstr(lcno, buff)); + return true; + } + if (check_not_null(self, thd, var)) + return true; + } + else // STRING_RESULT + { + String str(buff, sizeof(buff), system_charset_info), *res; + if (!(res=var->value->val_str(&str))) + return true; + else if (!(locale= my_locale_by_name(res->c_ptr_safe()))) + { + ErrConvString err(res); + my_error(ER_UNKNOWN_LOCALE, MYF(0), err.ptr()); + return true; + } + } + + var->save_result.ptr= locale; + + if (!locale->errmsgs->errmsgs) + { + bool res; + mysql_mutex_lock(&LOCK_error_messages); + res= (!locale->errmsgs->errmsgs && + read_texts(ERRMSG_FILE, locale->errmsgs->language, + &locale->errmsgs->errmsgs)); + mysql_mutex_unlock(&LOCK_error_messages); + if (res) + { + push_warning_printf(thd, Sql_condition::WARN_LEVEL_WARN, ER_UNKNOWN_ERROR, + "Can't process error message file for locale '%s'", + locale->name); + return true; + } + } + status_var_increment(thd->status_var.feature_locale); + return false; +} + +static bool update_locale(sys_var *self, THD* thd, enum_var_type type) +{ + /* Cache pointer to error messages */ + if (type == OPT_SESSION) + thd->variables.errmsgs= thd->variables.lc_messages->errmsgs->errmsgs; + else + global_system_variables.errmsgs= + global_system_variables.lc_messages->errmsgs->errmsgs; + return false; +} + +static Sys_var_struct Sys_lc_messages( + "lc_messages", "Set the language used for the error messages", + SESSION_VAR(lc_messages), NO_CMD_LINE, + offsetof(MY_LOCALE, name), DEFAULT(&my_default_lc_messages), + NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_locale), ON_UPDATE(update_locale)); + +static Sys_var_struct Sys_lc_time_names( + "lc_time_names", "Set the language used for the month " + "names and the days of the week", + SESSION_VAR(lc_time_names), NO_CMD_LINE, + offsetof(MY_LOCALE, name), DEFAULT(&my_default_lc_time_names), + NO_MUTEX_GUARD, IN_BINLOG, ON_CHECK(check_locale)); + +static Sys_var_tz Sys_time_zone( + "time_zone", "The current time zone, used to initialize the time " + "zone for a client when it connects. Set to SYSTEM by default, in " + "which the client uses the system time zone value.", + SESSION_VAR(time_zone), NO_CMD_LINE, + DEFAULT(&default_tz), NO_MUTEX_GUARD, IN_BINLOG); + +#ifdef WITH_WSREP +#include "wsrep_var.h" +#include "wsrep_sst.h" +#include "wsrep_binlog.h" + +static Sys_var_charptr_fscs Sys_wsrep_provider( + "wsrep_provider", "Path to replication provider library", + PREALLOCATED READ_ONLY GLOBAL_VAR(wsrep_provider), CMD_LINE(REQUIRED_ARG), + DEFAULT(WSREP_NONE), + NO_MUTEX_GUARD, NOT_IN_BINLOG, + ON_CHECK(wsrep_provider_check), ON_UPDATE(wsrep_provider_update)); + +static Sys_var_charptr Sys_wsrep_provider_options( + "wsrep_provider_options", "Semicolon (;) separated list of wsrep " + "options (see wsrep_provider_options documentation).", + PREALLOCATED GLOBAL_VAR(wsrep_provider_options), + CMD_LINE(REQUIRED_ARG), + DEFAULT(""), NO_MUTEX_GUARD, NOT_IN_BINLOG, + ON_CHECK(wsrep_provider_options_check), + ON_UPDATE(wsrep_provider_options_update)); + +static Sys_var_charptr_fscs Sys_wsrep_data_home_dir( + "wsrep_data_home_dir", "home directory for wsrep provider", + READ_ONLY GLOBAL_VAR(wsrep_data_home_dir), CMD_LINE(REQUIRED_ARG), + DEFAULT(mysql_real_data_home)); + +static Sys_var_charptr Sys_wsrep_cluster_name( + "wsrep_cluster_name", "Name for the cluster", + PREALLOCATED GLOBAL_VAR(wsrep_cluster_name), CMD_LINE(REQUIRED_ARG), + DEFAULT(WSREP_CLUSTER_NAME), + NO_MUTEX_GUARD, NOT_IN_BINLOG, + ON_CHECK(wsrep_cluster_name_check), + ON_UPDATE(wsrep_cluster_name_update)); + +static Sys_var_charptr Sys_wsrep_cluster_address ( + "wsrep_cluster_address", "Address to initially connect to cluster", + PREALLOCATED GLOBAL_VAR(wsrep_cluster_address), + CMD_LINE(REQUIRED_ARG), + DEFAULT(""), + NO_MUTEX_GUARD, NOT_IN_BINLOG, + ON_CHECK(wsrep_cluster_address_check), + ON_UPDATE(wsrep_cluster_address_update)); + +static Sys_var_charptr Sys_wsrep_node_name ( + "wsrep_node_name", "Name of this node. This name can be used in " + "wsrep_sst_donor as a preferred donor. Note that multiple nodes " + "in a cluster can have the same name.", + PREALLOCATED GLOBAL_VAR(wsrep_node_name), CMD_LINE(REQUIRED_ARG), + DEFAULT(glob_hostname), NO_MUTEX_GUARD, NOT_IN_BINLOG, + wsrep_node_name_check, wsrep_node_name_update); + +static Sys_var_charptr Sys_wsrep_node_address ( + "wsrep_node_address", "Specifies the node's network address, in " + "the format ip address[:port]. Used in situations where autoguessing " + "is not reliable. As of MariaDB 10.1.8, supports IPv6.", + PREALLOCATED GLOBAL_VAR(wsrep_node_address), CMD_LINE(REQUIRED_ARG), + DEFAULT(""), + NO_MUTEX_GUARD, NOT_IN_BINLOG, + ON_CHECK(wsrep_node_address_check), + ON_UPDATE(wsrep_node_address_update)); + +static Sys_var_charptr Sys_wsrep_node_incoming_address( + "wsrep_node_incoming_address", "Client connection address", + PREALLOCATED GLOBAL_VAR(wsrep_node_incoming_address),CMD_LINE(REQUIRED_ARG), + DEFAULT(WSREP_NODE_INCOMING_AUTO)); + +static Sys_var_ulong Sys_wsrep_slave_threads( + "wsrep_slave_threads", "Number of slave appliers to launch", + GLOBAL_VAR(wsrep_slave_threads), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(1, 512), DEFAULT(1), BLOCK_SIZE(1), + NO_MUTEX_GUARD, NOT_IN_BINLOG, + ON_CHECK(0), + ON_UPDATE(wsrep_slave_threads_update)); + +static Sys_var_charptr Sys_wsrep_dbug_option( + "wsrep_dbug_option", "DBUG options to provider library", + GLOBAL_VAR(wsrep_dbug_option),CMD_LINE(REQUIRED_ARG), + DEFAULT("")); + +static const char *wsrep_debug_names[]= +{ "NONE", "SERVER", "TRANSACTION", "STREAMING", "CLIENT", NullS }; +static Sys_var_enum Sys_wsrep_debug( + "wsrep_debug", "WSREP debug level logging", + GLOBAL_VAR(wsrep_debug), CMD_LINE(REQUIRED_ARG), + wsrep_debug_names, DEFAULT(0), + NO_MUTEX_GUARD, NOT_IN_BINLOG, + ON_CHECK(0), ON_UPDATE(wsrep_debug_update)); + +static Sys_var_mybool Sys_wsrep_convert_LOCK_to_trx( + "wsrep_convert_LOCK_to_trx", "To convert locking sessions " + "into transactions", + GLOBAL_VAR(wsrep_convert_LOCK_to_trx), + CMD_LINE(OPT_ARG), DEFAULT(FALSE)); + +static Sys_var_ulong Sys_wsrep_retry_autocommit( + "wsrep_retry_autocommit", "Max number of times to retry " + "a failed autocommit statement", + SESSION_VAR(wsrep_retry_autocommit), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(0, 10000), DEFAULT(1), BLOCK_SIZE(1)); + +static bool update_wsrep_auto_increment_control (sys_var *self, THD *thd, enum_var_type type) +{ + if (wsrep_auto_increment_control) + { + /* + The variables that control auto increment shall be calculated + automatically based on the size of the cluster. This usually done + within the wsrep_view_handler_cb callback. However, if the user + manually sets the value of wsrep_auto_increment_control to 'ON', + then we should to re-calculate these variables again (because + these values may be required before wsrep_view_handler_cb will + be re-invoked, which is rarely invoked if the cluster stays in + the stable state): + */ + global_system_variables.auto_increment_increment= + wsrep_cluster_size ? wsrep_cluster_size : 1; + global_system_variables.auto_increment_offset= + wsrep_local_index >= 0 ? wsrep_local_index + 1 : 1; + thd->variables.auto_increment_increment= + global_system_variables.auto_increment_increment; + thd->variables.auto_increment_offset= + global_system_variables.auto_increment_offset; + } + else + { + /* + We must restore the last values of the variables that + are explicitly specified by the user: + */ + global_system_variables.auto_increment_increment= + global_system_variables.saved_auto_increment_increment; + global_system_variables.auto_increment_offset= + global_system_variables.saved_auto_increment_offset; + thd->variables.auto_increment_increment= + thd->variables.saved_auto_increment_increment; + thd->variables.auto_increment_offset= + thd->variables.saved_auto_increment_offset; + } + return false; +} + +static Sys_var_mybool Sys_wsrep_auto_increment_control( + "wsrep_auto_increment_control", "To automatically control the " + "assignment of autoincrement variables", + GLOBAL_VAR(wsrep_auto_increment_control), + CMD_LINE(OPT_ARG), DEFAULT(TRUE), + NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(0), + ON_UPDATE(update_wsrep_auto_increment_control)); + +static Sys_var_mybool Sys_wsrep_drupal_282555_workaround( + "wsrep_drupal_282555_workaround", "Enable a workaround to handle the " + "cases where inserting a DEFAULT value into an auto-increment column " + "could fail with duplicate key error", + GLOBAL_VAR(wsrep_drupal_282555_workaround), + CMD_LINE(OPT_ARG), DEFAULT(FALSE)); + +static Sys_var_charptr sys_wsrep_sst_method( + "wsrep_sst_method", "State snapshot transfer method", + GLOBAL_VAR(wsrep_sst_method),CMD_LINE(REQUIRED_ARG), + DEFAULT(WSREP_SST_DEFAULT), NO_MUTEX_GUARD, NOT_IN_BINLOG, + ON_CHECK(wsrep_sst_method_check)); + +static Sys_var_charptr Sys_wsrep_sst_receive_address( + "wsrep_sst_receive_address", "Address where node is waiting for " + "SST contact", + GLOBAL_VAR(wsrep_sst_receive_address),CMD_LINE(REQUIRED_ARG), + DEFAULT(WSREP_SST_ADDRESS_AUTO), NO_MUTEX_GUARD, + NOT_IN_BINLOG, + ON_CHECK(wsrep_sst_receive_address_check), + ON_UPDATE(wsrep_sst_receive_address_update)); + +static Sys_var_charptr Sys_wsrep_sst_auth( + "wsrep_sst_auth", "Authentication for SST connection", + PREALLOCATED GLOBAL_VAR(wsrep_sst_auth), CMD_LINE(REQUIRED_ARG), + DEFAULT(NULL), NO_MUTEX_GUARD, + NOT_IN_BINLOG, + ON_CHECK(wsrep_sst_auth_check), + ON_UPDATE(wsrep_sst_auth_update)); + +static Sys_var_charptr Sys_wsrep_sst_donor( + "wsrep_sst_donor", "preferred donor node for the SST", + GLOBAL_VAR(wsrep_sst_donor),CMD_LINE(REQUIRED_ARG), + DEFAULT(""), NO_MUTEX_GUARD, NOT_IN_BINLOG, + ON_CHECK(wsrep_sst_donor_check), + ON_UPDATE(wsrep_sst_donor_update)); + +static Sys_var_mybool Sys_wsrep_sst_donor_rejects_queries( + "wsrep_sst_donor_rejects_queries", "Reject client queries " + "when donating state snapshot transfer", + GLOBAL_VAR(wsrep_sst_donor_rejects_queries), + CMD_LINE(OPT_ARG), DEFAULT(FALSE)); + +static Sys_var_mybool Sys_wsrep_on ( + "wsrep_on", "To enable wsrep replication ", + SESSION_VAR(wsrep_on), + CMD_LINE(OPT_ARG), DEFAULT(FALSE), + NO_MUTEX_GUARD, NOT_IN_BINLOG, + ON_CHECK(wsrep_on_check), + ON_UPDATE(wsrep_on_update)); + +static Sys_var_charptr Sys_wsrep_start_position ( + "wsrep_start_position", "global transaction position to start from ", + PREALLOCATED GLOBAL_VAR(wsrep_start_position), + CMD_LINE(REQUIRED_ARG), + DEFAULT(WSREP_START_POSITION_ZERO), + NO_MUTEX_GUARD, NOT_IN_BINLOG, + ON_CHECK(wsrep_start_position_check), + ON_UPDATE(wsrep_start_position_update)); + +static Sys_var_ulong Sys_wsrep_max_ws_size ( + "wsrep_max_ws_size", "Max write set size (bytes)", + GLOBAL_VAR(wsrep_max_ws_size), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(1024, WSREP_MAX_WS_SIZE), DEFAULT(WSREP_MAX_WS_SIZE), + BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, + ON_CHECK(wsrep_max_ws_size_check), ON_UPDATE(wsrep_max_ws_size_update)); + +static Sys_var_ulong Sys_wsrep_max_ws_rows ( + "wsrep_max_ws_rows", "Max number of rows in write set", + GLOBAL_VAR(wsrep_max_ws_rows), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(0, 1048576), DEFAULT(0), BLOCK_SIZE(1)); + +static Sys_var_charptr Sys_wsrep_notify_cmd( + "wsrep_notify_cmd", "", + READ_ONLY GLOBAL_VAR(wsrep_notify_cmd), CMD_LINE(REQUIRED_ARG), + DEFAULT("")); + +static Sys_var_charptr_fscs Sys_wsrep_status_file( + "wsrep_status_file", "wsrep status output filename", + READ_ONLY GLOBAL_VAR(wsrep_status_file), CMD_LINE(REQUIRED_ARG), + DEFAULT("")); + +static Sys_var_mybool Sys_wsrep_certify_nonPK( + "wsrep_certify_nonPK", "Certify tables with no primary key", + GLOBAL_VAR(wsrep_certify_nonPK), + CMD_LINE(OPT_ARG), DEFAULT(TRUE)); + +static const char *wsrep_certification_rules_names[]= { "strict", "optimized", NullS }; +static Sys_var_enum Sys_wsrep_certification_rules( + "wsrep_certification_rules", + "Certification rules to use in the cluster. Possible values are: " + "\"strict\": stricter rules that could result in more certification " + "failures. " + "\"optimized\": relaxed rules that allow more concurrency and " + "cause less certification failures.", + GLOBAL_VAR(wsrep_certification_rules), CMD_LINE(REQUIRED_ARG), + wsrep_certification_rules_names, DEFAULT(WSREP_CERTIFICATION_RULES_STRICT), + NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(0), + ON_UPDATE(0)); + +static Sys_var_mybool Sys_wsrep_causal_reads( + "wsrep_causal_reads", "Setting this variable is equivalent " + "to setting wsrep_sync_wait READ flag", + SESSION_VAR(wsrep_causal_reads), + CMD_LINE(OPT_ARG, OPT_WSREP_CAUSAL_READS), DEFAULT(FALSE), + NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(0), + ON_UPDATE(wsrep_causal_reads_update), + DEPRECATED("'@@wsrep_sync_wait=1'")); // since 10.1.3 + +static Sys_var_uint Sys_wsrep_sync_wait( + "wsrep_sync_wait", "Ensure \"synchronous\" read view before executing " + "an operation of the type specified by bitmask: 1 - READ(includes " + "SELECT, SHOW and BEGIN/START TRANSACTION); 2 - UPDATE and DELETE; 4 - " + "INSERT and REPLACE", + SESSION_VAR(wsrep_sync_wait), CMD_LINE(OPT_ARG, OPT_WSREP_SYNC_WAIT), + VALID_RANGE(WSREP_SYNC_WAIT_NONE, WSREP_SYNC_WAIT_MAX), + DEFAULT(WSREP_SYNC_WAIT_NONE), BLOCK_SIZE(1), + NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(0), + ON_UPDATE(wsrep_sync_wait_update)); + +static const char *wsrep_mode_names[]= +{ + "STRICT_REPLICATION", + "BINLOG_ROW_FORMAT_ONLY", + "REQUIRED_PRIMARY_KEY", + "REPLICATE_MYISAM", + "REPLICATE_ARIA", + "DISALLOW_LOCAL_GTID", + "BF_ABORT_MARIABACKUP", + NullS +}; +static Sys_var_set Sys_wsrep_mode( + "wsrep_mode", + "Set of WSREP features that are enabled.", + GLOBAL_VAR(wsrep_mode), CMD_LINE(REQUIRED_ARG), + wsrep_mode_names, + DEFAULT(0), + NO_MUTEX_GUARD, NOT_IN_BINLOG, + ON_CHECK(wsrep_mode_check)); + +static const char *wsrep_OSU_method_names[]= { "TOI", "RSU", NullS }; +static Sys_var_enum Sys_wsrep_OSU_method( + "wsrep_OSU_method", "Method for Online Schema Upgrade", + SESSION_VAR(wsrep_OSU_method), CMD_LINE(OPT_ARG), + wsrep_OSU_method_names, DEFAULT(WSREP_OSU_TOI)); + +static PolyLock_mutex PLock_wsrep_desync(&LOCK_wsrep_desync); +static Sys_var_mybool Sys_wsrep_desync ( + "wsrep_desync", "To desynchronize the node from the cluster", + GLOBAL_VAR(wsrep_desync), + CMD_LINE(OPT_ARG), DEFAULT(FALSE), + &PLock_wsrep_desync, NOT_IN_BINLOG, + ON_CHECK(wsrep_desync_check), + ON_UPDATE(wsrep_desync_update)); + +static const char *wsrep_reject_queries_names[]= { "NONE", "ALL", "ALL_KILL", NullS }; +static Sys_var_enum Sys_wsrep_reject_queries( + "wsrep_reject_queries", "Variable to set to reject queries", + GLOBAL_VAR(wsrep_reject_queries), CMD_LINE(OPT_ARG), + wsrep_reject_queries_names, DEFAULT(WSREP_REJECT_NONE), + NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(0), + ON_UPDATE(wsrep_reject_queries_update)); + +static const char *wsrep_binlog_format_names[]= + {"MIXED", "STATEMENT", "ROW", "NONE", NullS}; +static Sys_var_enum Sys_wsrep_forced_binlog_format( + "wsrep_forced_binlog_format", "binlog format to take effect over user's choice", + GLOBAL_VAR(wsrep_forced_binlog_format), CMD_LINE(REQUIRED_ARG), + wsrep_binlog_format_names, DEFAULT(BINLOG_FORMAT_UNSPEC)); + +static Sys_var_mybool Sys_wsrep_recover_datadir( + "wsrep_recover", "Recover database state after crash and exit", + READ_ONLY GLOBAL_VAR(wsrep_recovery), + CMD_LINE(OPT_ARG), DEFAULT(FALSE)); + +static Sys_var_mybool Sys_wsrep_log_conflicts( + "wsrep_log_conflicts", "To log multi-master conflicts", + GLOBAL_VAR(wsrep_log_conflicts), CMD_LINE(OPT_ARG), DEFAULT(FALSE)); + +static Sys_var_ulong Sys_wsrep_mysql_replication_bundle( + "wsrep_mysql_replication_bundle", "mysql replication group commit ", + GLOBAL_VAR(wsrep_mysql_replication_bundle), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(0, 1000), DEFAULT(0), BLOCK_SIZE(1)); + +static Sys_var_mybool Sys_wsrep_load_data_splitting( + "wsrep_load_data_splitting", "To commit LOAD DATA " + "transaction after every 10K rows inserted (deprecated)", + GLOBAL_VAR(wsrep_load_data_splitting), + CMD_LINE(OPT_ARG), DEFAULT(0), NO_MUTEX_GUARD, NOT_IN_BINLOG, + ON_CHECK(0), ON_UPDATE(0), DEPRECATED("")); // since 10.4.3 + +static Sys_var_mybool Sys_wsrep_slave_FK_checks( + "wsrep_slave_FK_checks", "Should slave thread do " + "foreign key constraint checks", + GLOBAL_VAR(wsrep_slave_FK_checks), + CMD_LINE(OPT_ARG), DEFAULT(TRUE)); + +static Sys_var_mybool Sys_wsrep_slave_UK_checks( + "wsrep_slave_UK_checks", "Should slave thread do " + "secondary index uniqueness checks", + GLOBAL_VAR(wsrep_slave_UK_checks), + CMD_LINE(OPT_ARG), DEFAULT(FALSE)); + +static Sys_var_mybool Sys_wsrep_restart_slave( + "wsrep_restart_slave", "Should MariaDB slave be restarted automatically, when node joins back to cluster", + GLOBAL_VAR(wsrep_restart_slave), CMD_LINE(OPT_ARG), DEFAULT(FALSE)); + +static Sys_var_ulonglong Sys_wsrep_trx_fragment_size( + "wsrep_trx_fragment_size", + "Size of transaction fragments for streaming replication (measured in " + "units of 'wsrep_trx_fragment_unit')", + SESSION_VAR(wsrep_trx_fragment_size), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(0, WSREP_MAX_WS_SIZE), DEFAULT(0), BLOCK_SIZE(1), + NO_MUTEX_GUARD, NOT_IN_BINLOG, + ON_CHECK(wsrep_trx_fragment_size_check), + ON_UPDATE(wsrep_trx_fragment_size_update)); + +extern const char *wsrep_fragment_units[]; + +static Sys_var_enum Sys_wsrep_trx_fragment_unit( + "wsrep_trx_fragment_unit", + "Unit for streaming replication transaction fragments' size: bytes, " + "rows, statements", + SESSION_VAR(wsrep_trx_fragment_unit), CMD_LINE(REQUIRED_ARG), + wsrep_fragment_units, + DEFAULT(WSREP_FRAG_BYTES), + NO_MUTEX_GUARD, NOT_IN_BINLOG, + ON_CHECK(0), + ON_UPDATE(wsrep_trx_fragment_unit_update)); + +extern const char *wsrep_SR_store_types[]; +static Sys_var_enum Sys_wsrep_SR_store( + "wsrep_SR_store", "Storage for streaming replication fragments", + READ_ONLY GLOBAL_VAR(wsrep_SR_store_type), CMD_LINE(REQUIRED_ARG), + wsrep_SR_store_types, DEFAULT(WSREP_SR_STORE_TABLE)); + +static Sys_var_mybool Sys_wsrep_dirty_reads( + "wsrep_dirty_reads", + "Allow reads even when the node is not in the primary component.", + SESSION_VAR(wsrep_dirty_reads), CMD_LINE(OPT_ARG), + DEFAULT(FALSE)); + +static Sys_var_uint Sys_wsrep_ignore_apply_errors ( + "wsrep_ignore_apply_errors", "Ignore replication errors", + GLOBAL_VAR(wsrep_ignore_apply_errors), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(WSREP_IGNORE_ERRORS_NONE, WSREP_IGNORE_ERRORS_MAX), + DEFAULT(7), BLOCK_SIZE(1)); + +static Sys_var_uint Sys_wsrep_gtid_domain_id( + "wsrep_gtid_domain_id", "When wsrep_gtid_mode is set, this value is " + "used as gtid_domain_id for galera transactions and also copied to the " + "joiner nodes during state transfer. It is ignored, otherwise.", + GLOBAL_VAR(wsrep_gtid_domain_id), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(0, UINT_MAX32), DEFAULT(0), BLOCK_SIZE(1), + NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(0), + ON_UPDATE(wsrep_gtid_domain_id_update)); + +static Sys_var_ulonglong Sys_wsrep_gtid_seq_no( + "wsrep_gtid_seq_no", + "Internal server usage, manually set WSREP GTID seqno.", + SESSION_ONLY(wsrep_gtid_seq_no), + NO_CMD_LINE, VALID_RANGE(0, ULONGLONG_MAX), DEFAULT(0), + BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, + ON_CHECK(wsrep_gtid_seq_no_check)); + +static Sys_var_mybool Sys_wsrep_gtid_mode( + "wsrep_gtid_mode", "Automatically update the (joiner) node's " + "wsrep_gtid_domain_id value with that of donor's (received during " + "state transfer) and use it in place of gtid_domain_id for all galera " + "transactions. When OFF (default), wsrep_gtid_domain_id is simply " + "ignored (backward compatibility).", + GLOBAL_VAR(wsrep_gtid_mode), CMD_LINE(OPT_ARG), DEFAULT(FALSE)); + +static char *wsrep_patch_version_ptr; +static Sys_var_charptr Sys_wsrep_patch_version( + "wsrep_patch_version", "Wsrep patch version, for example wsrep_25.10.", + READ_ONLY GLOBAL_VAR(wsrep_patch_version_ptr), CMD_LINE_HELP_ONLY, + DEFAULT(WSREP_PATCH_VERSION)); + + +static Sys_var_charptr Sys_wsrep_allowlist( + "wsrep_allowlist", "Allowed IP addresses split by comma delimiter", + READ_ONLY GLOBAL_VAR(wsrep_allowlist), CMD_LINE(REQUIRED_ARG), + DEFAULT("")); + +#endif /* WITH_WSREP */ + +static bool fix_host_cache_size(sys_var *, THD *, enum_var_type) +{ + hostname_cache_resize((uint) host_cache_size); + return false; +} + +static Sys_var_ulong Sys_host_cache_size( + "host_cache_size", + "How many host names should be cached to avoid resolving.", + AUTO_SET GLOBAL_VAR(host_cache_size), + CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, 65536), + DEFAULT(HOST_CACHE_SIZE), BLOCK_SIZE(1), + NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(0), + ON_UPDATE(fix_host_cache_size)); + +vio_keepalive_opts opt_vio_keepalive; + +static Sys_var_int Sys_keepalive_time( + "tcp_keepalive_time", + "Timeout, in seconds, with no activity until the first TCP keep-alive packet is sent." + "If set to 0, system dependent default is used.", + AUTO_SET GLOBAL_VAR(opt_vio_keepalive.idle), + CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, INT_MAX32/1000), DEFAULT(0), + BLOCK_SIZE(1)); + +static Sys_var_int Sys_keepalive_interval( + "tcp_keepalive_interval", + "The interval, in seconds, between when successive keep-alive packets are sent if no acknowledgement is received." + "If set to 0, system dependent default is used.", + AUTO_SET GLOBAL_VAR(opt_vio_keepalive.interval), + CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, INT_MAX32/1000), DEFAULT(0), + BLOCK_SIZE(1)); + +static Sys_var_int Sys_keepalive_probes( + "tcp_keepalive_probes", + "The number of unacknowledged probes to send before considering the connection dead and notifying the application layer." + "If set to 0, system dependent default is used.", + AUTO_SET GLOBAL_VAR(opt_vio_keepalive.probes), + CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, INT_MAX32/1000), DEFAULT(0), + BLOCK_SIZE(1)); + + +static bool update_tcp_nodelay(sys_var *self, THD *thd, + enum_var_type type) +{ + DBUG_ASSERT(thd); + + Vio *vio = thd->net.vio; + if (vio) + return (MY_TEST(vio_nodelay(vio, thd->variables.tcp_nodelay))); + + return false; +} + +static Sys_var_mybool Sys_tcp_nodelay( + "tcp_nodelay", + "Set option TCP_NODELAY (disable Nagle's algorithm) on socket", + SESSION_VAR(tcp_nodelay), CMD_LINE(OPT_ARG), + DEFAULT(TRUE),NO_MUTEX_GUARD, NOT_IN_BINLOG, + ON_CHECK(check_session_only_variable), + ON_UPDATE(update_tcp_nodelay)); + +static Sys_var_charptr_fscs Sys_ignore_db_dirs( + "ignore_db_dirs", + "Specifies a directory to add to the ignore list when collecting " + "database names from the datadir. Put a blank argument to reset " + "the list accumulated so far.", + READ_ONLY GLOBAL_VAR(opt_ignore_db_dirs), + CMD_LINE(REQUIRED_ARG, OPT_IGNORE_DB_DIRECTORY), + DEFAULT(0)); + +static Sys_var_ulong Sys_sp_cache_size( + "stored_program_cache", + "The soft upper limit for number of cached stored routines for " + "one connection.", + GLOBAL_VAR(stored_program_cache_size), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(0, 512 * 1024), DEFAULT(256), BLOCK_SIZE(1)); + +export const char *plugin_maturity_names[]= +{ "unknown", "experimental", "alpha", "beta", "gamma", "stable", 0 }; +static Sys_var_enum Sys_plugin_maturity( + "plugin_maturity", + "The lowest desirable plugin maturity. " + "Plugins less mature than that will not be installed or loaded", + READ_ONLY GLOBAL_VAR(plugin_maturity), CMD_LINE(REQUIRED_ARG), + plugin_maturity_names, + DEFAULT(SERVER_MATURITY_LEVEL > 0 ? + SERVER_MATURITY_LEVEL - 1 : SERVER_MATURITY_LEVEL)); + +static Sys_var_ulong Sys_deadlock_search_depth_short( + "deadlock_search_depth_short", + "Short search depth for the two-step deadlock detection", + SESSION_VAR(wt_deadlock_search_depth_short), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(0, 32), DEFAULT(4), BLOCK_SIZE(1)); + +static Sys_var_ulong Sys_deadlock_search_depth_long( + "deadlock_search_depth_long", + "Long search depth for the two-step deadlock detection", + SESSION_VAR(wt_deadlock_search_depth_long), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(0, 33), DEFAULT(15), BLOCK_SIZE(1)); + +static Sys_var_ulong Sys_deadlock_timeout_depth_short( + "deadlock_timeout_short", + "Short timeout for the two-step deadlock detection (in microseconds)", + SESSION_VAR(wt_timeout_short), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(0, UINT_MAX), DEFAULT(10000), BLOCK_SIZE(1)); + +static Sys_var_ulong Sys_deadlock_timeout_depth_long( + "deadlock_timeout_long", + "Long timeout for the two-step deadlock detection (in microseconds)", + SESSION_VAR(wt_timeout_long), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(0, UINT_MAX), DEFAULT(50000000), BLOCK_SIZE(1)); + +static Sys_var_uint Sys_extra_port( + "extra_port", + "Extra port number to use for tcp connections in a " + "one-thread-per-connection manner. 0 means don't use another port", + READ_ONLY GLOBAL_VAR(mysqld_extra_port), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(0, UINT_MAX32), DEFAULT(0), BLOCK_SIZE(1)); + +static Sys_var_on_access_global<Sys_var_ulong, + PRIV_SET_SYSTEM_GLOBAL_VAR_EXTRA_MAX_CONNECTIONS> +Sys_extra_max_connections( + "extra_max_connections", "The number of connections on extra-port", + GLOBAL_VAR(extra_max_connections), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(1, 100000), DEFAULT(1), BLOCK_SIZE(1), NO_MUTEX_GUARD, + NOT_IN_BINLOG, ON_CHECK(0), ON_UPDATE(fix_max_connections)); + +#ifdef SAFE_MUTEX +static Sys_var_mybool Sys_mutex_deadlock_detector( + "debug_mutex_deadlock_detector", "Enable checking of wrong mutex usage", + READ_ONLY GLOBAL_VAR(safe_mutex_deadlock_detector), + CMD_LINE(OPT_ARG), DEFAULT(TRUE)); +#endif + +static Sys_var_keycache Sys_key_cache_segments( + "key_cache_segments", "The number of segments in a key cache", + KEYCACHE_VAR(param_partitions), + CMD_LINE(REQUIRED_ARG, OPT_KEY_CACHE_PARTITIONS), + VALID_RANGE(0, MAX_KEY_CACHE_PARTITIONS), + DEFAULT(DEFAULT_KEY_CACHE_PARTITIONS), + BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(0), + ON_UPDATE(repartition_keycache)); + +static const char *log_slow_filter_names[]= +{ + "admin", "filesort", "filesort_on_disk", "filesort_priority_queue", + "full_join", "full_scan", "not_using_index", "query_cache", + "query_cache_miss", "tmp_table", "tmp_table_on_disk", 0 +}; + + +static Sys_var_set Sys_log_slow_filter( + "log_slow_filter", + "Log only certain types of queries to the slow log. If variable empty all kind of queries are logged. All types are bound by slow_query_time, except 'not_using_index' which is always logged if enabled", + SESSION_VAR(log_slow_filter), CMD_LINE(REQUIRED_ARG), + log_slow_filter_names, + /* by default we log all queries except 'not_using_index' */ + DEFAULT(my_set_bits(array_elements(log_slow_filter_names)-1) & + ~QPLAN_NOT_USING_INDEX)); + +static const char *log_slow_disabled_statements_names[]= +{ "admin", "call", "slave", "sp", 0 }; + +static const char *log_disabled_statements_names[]= +{ "slave", "sp", 0 }; + +static Sys_var_set Sys_log_slow_disabled_statements( + "log_slow_disabled_statements", + "Don't log certain types of statements to slow log", + SESSION_VAR(log_slow_disabled_statements), CMD_LINE(REQUIRED_ARG), + log_slow_disabled_statements_names, + DEFAULT(LOG_SLOW_DISABLE_SP)); + +static Sys_var_set Sys_log_disabled_statements( + "log_disabled_statements", + "Don't log certain types of statements to general log", + SESSION_VAR(log_disabled_statements), CMD_LINE(REQUIRED_ARG), + log_disabled_statements_names, + DEFAULT(LOG_DISABLE_SP), + NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_has_super)); + +#define NOT_SUPPORTED_YET -2 +#ifndef PCRE2_EXTENDED_MORE +#define PCRE2_EXTENDED_MORE NOT_SUPPORTED_YET +#endif + +static const char *default_regex_flags_names[]= +{ + "DOTALL", // (?s) . matches anything including NL + "DUPNAMES", // (?J) Allow duplicate names for subpatterns + "EXTENDED", // (?x) Ignore white space and # comments + "EXTENDED_MORE",//(?xx) Ignore white space and # comments inside cheracter + "EXTRA", // means nothing since PCRE2 + "MULTILINE", // (?m) ^ and $ match newlines within data + "UNGREEDY", // (?U) Invert greediness of quantifiers + 0 +}; +static const int default_regex_flags_to_pcre[]= +{ + PCRE2_DOTALL, + PCRE2_DUPNAMES, + PCRE2_EXTENDED, + PCRE2_EXTENDED_MORE, + -1, /* EXTRA flag not available since PCRE2 */ + PCRE2_MULTILINE, + PCRE2_UNGREEDY, + 0 +}; +int default_regex_flags_pcre(THD *thd) +{ + ulonglong src= thd->variables.default_regex_flags; + int i, res; + for (i= res= 0; default_regex_flags_to_pcre[i]; i++) + { + if (src & (1ULL << i)) + { + if (default_regex_flags_to_pcre[i] < 0) + { + const char *msg= default_regex_flags_to_pcre[i] == NOT_SUPPORTED_YET + ? "Your version of PCRE2 does not support the %s flag. Ignored." + : "PCRE2 doesn't support the %s flag. Ignored."; + push_warning_printf(thd, Sql_condition::WARN_LEVEL_WARN, + ER_UNKNOWN_ERROR, msg, default_regex_flags_names[i]); + continue; + } + res|= default_regex_flags_to_pcre[i]; + } + } + return res; +} +static Sys_var_set Sys_default_regex_flags( + "default_regex_flags", + "Default flags for the regex library", + SESSION_VAR(default_regex_flags), CMD_LINE(REQUIRED_ARG), + default_regex_flags_names, + DEFAULT(0)); + +static Sys_var_ulong Sys_log_slow_rate_limit( + "log_slow_rate_limit", + "Write to slow log every #th slow query. Set to 1 to log everything. " + "Increase it to reduce the size of the slow or the performance impact " + "of slow logging", + SESSION_VAR(log_slow_rate_limit), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(1, UINT_MAX), DEFAULT(1), BLOCK_SIZE(1)); + +/* + Full is not needed below anymore as one can set all bits with '= ALL', but + we need it for compatiblity with earlier versions. +*/ +static const char *log_slow_verbosity_names[]= +{ "innodb", "query_plan", "explain", "engine", "warnings", "full", 0}; + +static Sys_var_set Sys_log_slow_verbosity( + "log_slow_verbosity", + "Verbosity level for the slow log", + SESSION_VAR(log_slow_verbosity), CMD_LINE(REQUIRED_ARG), + log_slow_verbosity_names, DEFAULT(LOG_SLOW_VERBOSITY_INIT)); + +static Sys_var_ulong Sys_log_slow_max_warnings( + "log_slow_max_warnings", + "Max numbers of warnings printed to slow query log per statement", + SESSION_VAR(log_slow_max_warnings), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(0, 1000), DEFAULT(10), BLOCK_SIZE(1)); + +static const char *note_verbosity_names[]= +{ "basic", "unusable_keys", "explain", 0}; + +static Sys_var_set Sys_note_verbosity( + "note_verbosity", + "Verbosity level for note-warnings given to the user. " + "See also @@sql_notes.", + SESSION_VAR(note_verbosity), CMD_LINE(REQUIRED_ARG), + note_verbosity_names, DEFAULT(NOTE_VERBOSITY_NORMAL | + NOTE_VERBOSITY_EXPLAIN)); + +static Sys_var_ulong Sys_join_cache_level( + "join_cache_level", + "Controls what join operations can be executed with join buffers. Odd " + "numbers are used for plain join buffers while even numbers are used " + "for linked buffers", + SESSION_VAR(join_cache_level), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(0, 8), DEFAULT(2), BLOCK_SIZE(1)); + +static Sys_var_ulong Sys_mrr_buffer_size( + "mrr_buffer_size", + "Size of buffer to use when using MRR with range access", + SESSION_VAR(mrr_buff_size), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(IO_SIZE*2, INT_MAX32), DEFAULT(256*1024), BLOCK_SIZE(1)); + +static Sys_var_ulong Sys_rowid_merge_buff_size( + "rowid_merge_buff_size", + "The size of the buffers used [NOT] IN evaluation via partial matching", + SESSION_VAR(rowid_merge_buff_size), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(0, LONG_MAX), DEFAULT(8*1024*1024), + BLOCK_SIZE(1)); + +static Sys_var_mybool Sys_userstat( + "userstat", + "Enables statistics gathering for USER_STATISTICS, CLIENT_STATISTICS, " + "INDEX_STATISTICS and TABLE_STATISTICS tables in the INFORMATION_SCHEMA", + GLOBAL_VAR(opt_userstat_running), + CMD_LINE(OPT_ARG), DEFAULT(FALSE)); + +static Sys_var_on_access<Sys_var_mybool, + PRIV_SET_SYSTEM_VAR_BINLOG_ANNOTATE_ROW_EVENTS, + PRIV_SET_SYSTEM_VAR_BINLOG_ANNOTATE_ROW_EVENTS> +Sys_binlog_annotate_row_events( + "binlog_annotate_row_events", + "Tells the master to annotate RBR events with the statement that " + "caused these events", + SESSION_VAR(binlog_annotate_row_events), CMD_LINE(OPT_ARG), + DEFAULT(TRUE)); + +#ifdef HAVE_REPLICATION +static Sys_var_mybool Sys_replicate_annotate_row_events( + "replicate_annotate_row_events", + "Tells the slave to write annotate rows events received from the master " + "to its own binary log. Ignored if log_slave_updates is not set", + READ_ONLY GLOBAL_VAR(opt_replicate_annotate_row_events), + CMD_LINE(OPT_ARG), DEFAULT(TRUE)); +#endif + +static Sys_var_ulonglong Sys_join_buffer_space_limit( + "join_buffer_space_limit", + "The limit of the space for all join buffers used by a query", + SESSION_VAR(join_buff_space_limit), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(2048, ULONGLONG_MAX), DEFAULT(16*128*1024), + BLOCK_SIZE(2048)); + +static Sys_var_ulong Sys_progress_report_time( + "progress_report_time", + "Seconds between sending progress reports to the client for " + "time-consuming statements. Set to 0 to disable progress reporting.", + SESSION_VAR(progress_report_time), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(0, UINT_MAX), DEFAULT(5), BLOCK_SIZE(1)); + +const char *use_stat_tables_modes[] = + {"NEVER", "COMPLEMENTARY", "PREFERABLY", + "COMPLEMENTARY_FOR_QUERIES", "PREFERABLY_FOR_QUERIES", 0}; +static Sys_var_enum Sys_optimizer_use_stat_tables( + "use_stat_tables", + "Specifies how to use system statistics tables", + SESSION_VAR(use_stat_tables), CMD_LINE(REQUIRED_ARG), + use_stat_tables_modes, DEFAULT(4)); + +static Sys_var_ulong Sys_histogram_size( + "histogram_size", + "Number of bytes used for a histogram. " + "If set to 0, no histograms are created by ANALYZE.", + SESSION_VAR(histogram_size), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(0, 255), DEFAULT(254), BLOCK_SIZE(1)); + +extern const char *histogram_types[]; +static Sys_var_enum Sys_histogram_type( + "histogram_type", + "Specifies type of the histograms created by ANALYZE. " + "Possible values are: " + "SINGLE_PREC_HB - single precision height-balanced, " + "DOUBLE_PREC_HB - double precision height-balanced, " + "JSON_HB - height-balanced, stored as JSON.", + SESSION_VAR(histogram_type), CMD_LINE(REQUIRED_ARG), + histogram_types, DEFAULT(1)); + +static Sys_var_mybool Sys_no_thread_alarm( + "debug_no_thread_alarm", + "Disable system thread alarm calls. Disabling it may be useful " + "in debugging or testing, never do it in production", + READ_ONLY GLOBAL_VAR(my_disable_thr_alarm), CMD_LINE(OPT_ARG), + DEFAULT(FALSE)); + +static Sys_var_mybool Sys_query_cache_strip_comments( + "query_cache_strip_comments", + "Strip all comments from a query before storing it " + "in the query cache", + SESSION_VAR(query_cache_strip_comments), CMD_LINE(OPT_ARG), + DEFAULT(FALSE)); + +static ulonglong in_transaction(THD *thd) +{ + return MY_TEST(thd->in_active_multi_stmt_transaction()); +} +static Sys_var_session_special Sys_in_transaction( + "in_transaction", "Whether there is an active transaction", + READ_ONLY sys_var::ONLY_SESSION, NO_CMD_LINE, + VALID_RANGE(0, 1), BLOCK_SIZE(1), NO_MUTEX_GUARD, + NOT_IN_BINLOG, ON_CHECK(0), ON_UPDATE(0), ON_READ(in_transaction)); + +#ifndef DBUG_OFF +static Sys_var_ulong Sys_debug_binlog_fsync_sleep( + "debug_binlog_fsync_sleep", + "Extra sleep (in microseconds) to add to binlog fsync(), for debugging", + GLOBAL_VAR(opt_binlog_dbug_fsync_sleep), + CMD_LINE(REQUIRED_ARG), + VALID_RANGE(0, UINT_MAX), DEFAULT(0), BLOCK_SIZE(1)); +#endif + +static Sys_var_harows Sys_expensive_subquery_limit( + "expensive_subquery_limit", + "The maximum number of rows a subquery may examine in order to be " + "executed during optimization and used for constant optimization", + SESSION_VAR(expensive_subquery_limit), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(0, HA_POS_ERROR), DEFAULT(100), BLOCK_SIZE(1)); + +static Sys_var_mybool Sys_encrypt_tmp_disk_tables( + "encrypt_tmp_disk_tables", + "Encrypt temporary on-disk tables (created as part of query execution)", + GLOBAL_VAR(encrypt_tmp_disk_tables), + CMD_LINE(OPT_ARG), DEFAULT(FALSE)); + +static Sys_var_mybool Sys_encrypt_tmp_files( + "encrypt_tmp_files", + "Encrypt temporary files (created for filesort, binary log cache, etc)", + READ_ONLY GLOBAL_VAR(encrypt_tmp_files), + CMD_LINE(OPT_ARG), DEFAULT(FALSE)); + +static Sys_var_mybool Sys_binlog_encryption( + "encrypt_binlog", "Encrypt binary logs (including relay logs)", + READ_ONLY GLOBAL_VAR(encrypt_binlog), CMD_LINE(OPT_ARG), + DEFAULT(FALSE)); + +static const char *binlog_row_image_names[]= {"MINIMAL", "NOBLOB", "FULL", NullS}; +static Sys_var_on_access<Sys_var_enum, + PRIV_SET_SYSTEM_VAR_BINLOG_ROW_IMAGE, + PRIV_SET_SYSTEM_VAR_BINLOG_ROW_IMAGE> +Sys_binlog_row_image( + "binlog_row_image", + "Controls whether rows should be logged in 'FULL', 'NOBLOB' or " + "'MINIMAL' formats. 'FULL', means that all columns in the before " + "and after image are logged. 'NOBLOB', means that mysqld avoids logging " + "blob columns whenever possible (eg, blob column was not changed or " + "is not part of primary key). 'MINIMAL', means that a PK equivalent (PK " + "columns or full row if there is no PK in the table) is logged in the " + "before image, and only changed columns are logged in the after image. " + "(Default: FULL).", + SESSION_VAR(binlog_row_image), CMD_LINE(REQUIRED_ARG), + binlog_row_image_names, DEFAULT(BINLOG_ROW_IMAGE_FULL)); + +static const char *binlog_row_metadata_names[]= {"NO_LOG", "MINIMAL", "FULL", NullS}; +static Sys_var_on_access_global<Sys_var_enum, + PRIV_SET_SYSTEM_GLOBAL_VAR_BINLOG_ROW_METADATA> +Sys_binlog_row_metadata( + "binlog_row_metadata", + "Controls whether metadata is logged using FULL , MINIMAL format and NO_LOG." + "FULL causes all metadata to be logged; MINIMAL means that only " + "metadata actually required by slave is logged; NO_LOG NO metadata will be logged." + "Default: NO_LOG.", + GLOBAL_VAR(binlog_row_metadata), CMD_LINE(REQUIRED_ARG), + binlog_row_metadata_names, DEFAULT(Table_map_log_event::BINLOG_ROW_METADATA_NO_LOG), + NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(NULL), + ON_UPDATE(NULL)); + + +static bool check_pseudo_slave_mode(sys_var *self, THD *thd, set_var *var) +{ + longlong previous_val= thd->variables.pseudo_slave_mode; + longlong val= (longlong) var->save_result.ulonglong_value; + bool rli_fake= false; + +#ifndef EMBEDDED_LIBRARY + rli_fake= thd->rli_fake ? true : false; +#endif + + if (rli_fake) + { + if (!val) + { +#ifndef EMBEDDED_LIBRARY + delete thd->rli_fake; + thd->rli_fake= NULL; + delete thd->rgi_fake; + thd->rgi_fake= NULL; +#endif + } + else if (previous_val && val) + goto ineffective; + else if (!previous_val && val) + push_warning(thd, Sql_condition::WARN_LEVEL_WARN, + ER_WRONG_VALUE_FOR_VAR, + "'pseudo_slave_mode' is already ON."); + } + else + { + if (!previous_val && !val) + goto ineffective; + else if (previous_val && !val) + push_warning(thd, Sql_condition::WARN_LEVEL_WARN, + ER_WRONG_VALUE_FOR_VAR, + "Slave applier execution mode not active, " + "statement ineffective."); + } + goto end; + +ineffective: + push_warning(thd, Sql_condition::WARN_LEVEL_WARN, + ER_WRONG_VALUE_FOR_VAR, + "'pseudo_slave_mode' change was ineffective."); + +end: + return FALSE; +} +static Sys_var_mybool Sys_pseudo_slave_mode( + "pseudo_slave_mode", + "SET pseudo_slave_mode= 0,1 are commands that mysqlbinlog " + "adds to beginning and end of binary log dumps. While zero " + "value indeed disables, the actual enabling of the slave " + "applier execution mode is done implicitly when a " + "Format_description_event is sent through the session.", + SESSION_ONLY(pseudo_slave_mode), NO_CMD_LINE, DEFAULT(FALSE), + NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_pseudo_slave_mode)); + +static Sys_var_mybool Sys_mysql56_temporal_format( + "mysql56_temporal_format", + "Use MySQL-5.6 (instead of MariaDB-5.3) format for TIME, DATETIME, TIMESTAMP columns.", + GLOBAL_VAR(opt_mysql56_temporal_format), + CMD_LINE(OPT_ARG), DEFAULT(TRUE)); + +static Sys_var_mybool Sys_strict_password_validation( + "strict_password_validation", + "When password validation plugins are enabled, reject passwords " + "that cannot be validated (passwords specified as a hash)", + GLOBAL_VAR(strict_password_validation), + CMD_LINE(OPT_ARG), DEFAULT(TRUE)); + +#ifdef HAVE_MMAP +static Sys_var_ulong Sys_log_tc_size( + "log_tc_size", + "Size of transaction coordinator log.", + READ_ONLY GLOBAL_VAR(opt_tc_log_size), + CMD_LINE(REQUIRED_ARG), + VALID_RANGE(my_getpagesize() * 3, ULONG_MAX), + DEFAULT(my_getpagesize() * 6), BLOCK_SIZE(my_getpagesize())); +#endif + +static Sys_var_ulonglong Sys_max_session_mem_used( + "max_session_mem_used", "Amount of memory a single user session " + "is allowed to allocate. This limits the value of the " + "session variable MEM_USED", SESSION_VAR(max_mem_used), + CMD_LINE(REQUIRED_ARG), VALID_RANGE(8192, ULONGLONG_MAX), + DEFAULT(LONGLONG_MAX), BLOCK_SIZE(1)); + +#ifndef EMBEDDED_LIBRARY + +static Sys_var_sesvartrack Sys_track_session_sys_vars( + "session_track_system_variables", + "Track changes in registered system variables. ", + CMD_LINE(REQUIRED_ARG), + DEFAULT("autocommit,character_set_client,character_set_connection," + "character_set_results,time_zone")); + +static bool update_session_track_schema(sys_var *self, THD *thd, + enum_var_type type) +{ + DBUG_ENTER("update_session_track_schema"); + DBUG_RETURN(thd->session_tracker.current_schema.update(thd, NULL)); +} + +static Sys_var_mybool Sys_session_track_schema( + "session_track_schema", + "Track changes to the default schema.", + SESSION_VAR(session_track_schema), + CMD_LINE(OPT_ARG), DEFAULT(TRUE), + NO_MUTEX_GUARD, NOT_IN_BINLOG, + ON_CHECK(0), + ON_UPDATE(update_session_track_schema)); + + +static bool update_session_track_tx_info(sys_var *self, THD *thd, + enum_var_type type) +{ + DBUG_ENTER("update_session_track_tx_info"); + DBUG_RETURN(thd->session_tracker.transaction_info.update(thd, NULL)); +} + +static const char *session_track_transaction_info_names[]= + { "OFF", "STATE", "CHARACTERISTICS", NullS }; + +static Sys_var_enum Sys_session_track_transaction_info( + "session_track_transaction_info", + "Track changes to the transaction attributes. OFF to disable; " + "STATE to track just transaction state (Is there an active transaction? " + "Does it have any data? etc.); CHARACTERISTICS to track transaction " + "state and report all statements needed to start a transaction with " + "the same characteristics (isolation level, read only/read write," + "snapshot - but not any work done / data modified within the " + "transaction).", + SESSION_VAR(session_track_transaction_info), + CMD_LINE(REQUIRED_ARG), session_track_transaction_info_names, + DEFAULT(0), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(0), + ON_UPDATE(update_session_track_tx_info)); + + +static bool update_session_track_state_change(sys_var *self, THD *thd, + enum_var_type type) +{ + DBUG_ENTER("update_session_track_state_change"); + DBUG_RETURN(thd->session_tracker.state_change.update(thd, NULL)); +} + +static Sys_var_mybool Sys_session_track_state_change( + "session_track_state_change", + "Track changes to the session state.", + SESSION_VAR(session_track_state_change), + CMD_LINE(OPT_ARG), DEFAULT(FALSE), + NO_MUTEX_GUARD, NOT_IN_BINLOG, + ON_CHECK(0), + ON_UPDATE(update_session_track_state_change)); + + +#ifdef USER_VAR_TRACKING +static bool update_session_track_user_variables(sys_var *self, THD *thd, + enum_var_type type) +{ + return thd->session_tracker.user_variables.update(thd, 0); +} + +static Sys_var_mybool Sys_session_track_user_variables( + "session_track_user_variables", + "Track changes to user variables.", + SESSION_VAR(session_track_user_variables), + CMD_LINE(OPT_ARG), DEFAULT(FALSE), + NO_MUTEX_GUARD, NOT_IN_BINLOG, + ON_CHECK(0), + ON_UPDATE(update_session_track_user_variables)); +#endif // USER_VAR_TRACKING + +#endif //EMBEDDED_LIBRARY + +static Sys_var_uint Sys_in_subquery_conversion_threshold( + "in_predicate_conversion_threshold", + "The minimum number of scalar elements in the value list of " + "IN predicate that triggers its conversion to IN subquery. Set to " + "0 to disable the conversion.", + SESSION_VAR(in_subquery_conversion_threshold), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(0, UINT_MAX), DEFAULT(IN_SUBQUERY_CONVERSION_THRESHOLD), BLOCK_SIZE(1)); + +static Sys_var_ulong Sys_optimizer_max_sel_arg_weight( + "optimizer_max_sel_arg_weight", + "The maximum weight of the SEL_ARG graph. Set to 0 for no limit", + SESSION_VAR(optimizer_max_sel_arg_weight), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(0, UINT_MAX), DEFAULT(SEL_ARG::MAX_WEIGHT), BLOCK_SIZE(1)); + +static Sys_var_ulong Sys_optimizer_max_sel_args( + "optimizer_max_sel_args", + "The maximum number of SEL_ARG objects created when optimizing a range. " + "If more objects would be needed, the range will not be used by the " + "optimizer.", + SESSION_VAR(optimizer_max_sel_args), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(0, UINT_MAX), DEFAULT(SEL_ARG::DEFAULT_MAX_SEL_ARGS), BLOCK_SIZE(1)); + +static Sys_var_enum Sys_secure_timestamp( + "secure_timestamp", "Restricts direct setting of a session " + "timestamp. Possible levels are: YES - timestamp cannot deviate from " + "the system clock, REPLICATION - replication thread can adjust " + "timestamp to match the master's, SUPER - a user with this " + "privilege and a replication thread can adjust timestamp, NO - " + "historical behavior, anyone can modify session timestamp", + READ_ONLY GLOBAL_VAR(opt_secure_timestamp), CMD_LINE(REQUIRED_ARG), + secure_timestamp_levels, DEFAULT(SECTIME_NO)); + +static Sys_var_ulonglong Sys_max_rowid_filter_size( + "max_rowid_filter_size", + "The maximum size of the container of a rowid filter", + SESSION_VAR(max_rowid_filter_size), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(1024, (ulonglong)~(intptr)0), DEFAULT(128*1024), + BLOCK_SIZE(1)); + +static Sys_var_bit Sys_system_versioning_insert_history( + "system_versioning_insert_history", + "Allows direct inserts into ROW_START and ROW_END columns if " + "secure_timestamp allows changing @@timestamp", + SESSION_VAR(option_bits), CMD_LINE(OPT_ARG), + OPTION_INSERT_HISTORY, DEFAULT(FALSE), + NO_MUTEX_GUARD, IN_BINLOG); |