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Diffstat (limited to 'sql/sql_show.h')
| -rw-r--r-- | sql/sql_show.h | 259 |
1 files changed, 259 insertions, 0 deletions
diff --git a/sql/sql_show.h b/sql/sql_show.h new file mode 100644 index 00000000..3d7a4d11 --- /dev/null +++ b/sql/sql_show.h @@ -0,0 +1,259 @@ +/* Copyright (c) 2005, 2010, Oracle and/or its affiliates. + Copyright (c) 2012, 2016, MariaDB + + 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 */ + +#ifndef SQL_SHOW_H +#define SQL_SHOW_H + +#include "sql_list.h" /* List */ +#include "handler.h" /* enum_schema_tables */ +#include "table.h" /* enum_schema_table_state */ +#include "my_apc.h" + +/* Forward declarations */ +class JOIN; +class String; +class THD; +class sp_name; +struct TABLE_LIST; +typedef class st_select_lex SELECT_LEX; +struct LEX; +typedef struct st_mysql_show_var SHOW_VAR; +typedef struct st_schema_table ST_SCHEMA_TABLE; +struct TABLE; +typedef struct system_status_var STATUS_VAR; + +/* Used by handlers to store things in schema tables */ +#define IS_FILES_FILE_ID 0 +#define IS_FILES_FILE_NAME 1 +#define IS_FILES_FILE_TYPE 2 +#define IS_FILES_TABLESPACE_NAME 3 +#define IS_FILES_TABLE_CATALOG 4 +#define IS_FILES_TABLE_SCHEMA 5 +#define IS_FILES_TABLE_NAME 6 +#define IS_FILES_LOGFILE_GROUP_NAME 7 +#define IS_FILES_LOGFILE_GROUP_NUMBER 8 +#define IS_FILES_ENGINE 9 +#define IS_FILES_FULLTEXT_KEYS 10 +#define IS_FILES_DELETED_ROWS 11 +#define IS_FILES_UPDATE_COUNT 12 +#define IS_FILES_FREE_EXTENTS 13 +#define IS_FILES_TOTAL_EXTENTS 14 +#define IS_FILES_EXTENT_SIZE 15 +#define IS_FILES_INITIAL_SIZE 16 +#define IS_FILES_MAXIMUM_SIZE 17 +#define IS_FILES_AUTOEXTEND_SIZE 18 +#define IS_FILES_CREATION_TIME 19 +#define IS_FILES_LAST_UPDATE_TIME 20 +#define IS_FILES_LAST_ACCESS_TIME 21 +#define IS_FILES_RECOVER_TIME 22 +#define IS_FILES_TRANSACTION_COUNTER 23 +#define IS_FILES_VERSION 24 +#define IS_FILES_ROW_FORMAT 25 +#define IS_FILES_TABLE_ROWS 26 +#define IS_FILES_AVG_ROW_LENGTH 27 +#define IS_FILES_DATA_LENGTH 28 +#define IS_FILES_MAX_DATA_LENGTH 29 +#define IS_FILES_INDEX_LENGTH 30 +#define IS_FILES_DATA_FREE 31 +#define IS_FILES_CREATE_TIME 32 +#define IS_FILES_UPDATE_TIME 33 +#define IS_FILES_CHECK_TIME 34 +#define IS_FILES_CHECKSUM 35 +#define IS_FILES_STATUS 36 +#define IS_FILES_EXTRA 37 + +typedef enum { WITHOUT_DB_NAME, WITH_DB_NAME } enum_with_db_name; + +int get_all_tables(THD *thd, TABLE_LIST *tables, COND *cond); + +int show_create_table(THD *thd, TABLE_LIST *table_list, String *packet, + Table_specification_st *create_info_arg, + enum_with_db_name with_db_name); + +int show_create_table_ex(THD *thd, TABLE_LIST *table_list, + const char * forced_db, const char *forced_name, + String *packet, + Table_specification_st *create_info_arg, + enum_with_db_name with_db_name); + +int copy_event_to_schema_table(THD *thd, TABLE *sch_table, TABLE *event_table); + +bool append_identifier(THD *thd, String *packet, const char *name, size_t length); +static inline bool append_identifier(THD *thd, String *packet, const LEX_CSTRING *name) +{ + return append_identifier(thd, packet, name->str, name->length); +} +void mysqld_list_fields(THD *thd,TABLE_LIST *table, const char *wild); +int mysqld_dump_create_info(THD *thd, TABLE_LIST *table_list, int fd); +bool mysqld_show_create_get_fields(THD *thd, TABLE_LIST *table_list, + List<Item> *field_list, String *buffer); +bool mysqld_show_create(THD *thd, TABLE_LIST *table_list); +void mysqld_show_create_db_get_fields(THD *thd, List<Item> *field_list); +bool mysqld_show_create_db(THD *thd, LEX_CSTRING *db_name, + LEX_CSTRING *orig_db_name, + const DDL_options_st &options); + +void mysqld_list_processes(THD *thd,const char *user,bool verbose); +int mysqld_show_status(THD *thd); +int mysqld_show_variables(THD *thd,const char *wild); +bool mysqld_show_storage_engines(THD *thd); +bool mysqld_show_authors(THD *thd); +bool mysqld_show_contributors(THD *thd); +bool mysqld_show_privileges(THD *thd); +char *make_backup_log_name(char *buff, const char *name, const char* log_ext); +uint calc_sum_of_all_status(STATUS_VAR *to); +bool append_definer(THD *thd, String *buffer, const LEX_CSTRING *definer_user, + const LEX_CSTRING *definer_host); +int add_status_vars(SHOW_VAR *list); +void remove_status_vars(SHOW_VAR *list); +ulonglong get_status_vars_version(void); +void init_status_vars(); +void free_status_vars(); +void reset_status_vars(); +bool show_create_trigger(THD *thd, const sp_name *trg_name); +void view_store_options(THD *thd, TABLE_LIST *table, String *buff); + +void init_fill_schema_files_row(TABLE* table); +void initialize_information_schema_acl(); + +ST_SCHEMA_TABLE *find_schema_table(THD *thd, const LEX_CSTRING *table_name, + bool *in_plugin); +static inline ST_SCHEMA_TABLE *find_schema_table(THD *thd, const LEX_CSTRING *table_name) +{ bool unused; return find_schema_table(thd, table_name, &unused); } + +ST_SCHEMA_TABLE *get_schema_table(enum enum_schema_tables schema_table_idx); +int make_schema_select(THD *thd, SELECT_LEX *sel, + ST_SCHEMA_TABLE *schema_table); +int mysql_schema_table(THD *thd, LEX *lex, TABLE_LIST *table_list); +bool get_schema_tables_result(JOIN *join, + enum enum_schema_table_state executed_place); +enum enum_schema_tables get_schema_table_idx(ST_SCHEMA_TABLE *schema_table); +TABLE *create_schema_table(THD *thd, TABLE_LIST *table_list); + +const char* get_one_variable(THD *thd, const SHOW_VAR *variable, + enum_var_type value_type, SHOW_TYPE show_type, + system_status_var *status_var, + const CHARSET_INFO **charset, char *buff, + size_t *length); + +/* These functions were under INNODB_COMPATIBILITY_HOOKS */ +int get_quote_char_for_identifier(THD *thd, const char *name, size_t length); +THD *find_thread_by_id(longlong id, bool query_id= false); + +class select_result_explain_buffer; +/* + SHOW EXPLAIN request object. +*/ + +class Show_explain_request : public Apc_target::Apc_call +{ +public: + THD *target_thd; /* thd that we're running SHOW EXPLAIN for */ + THD *request_thd; /* thd that run SHOW EXPLAIN command */ + + /* If true, there was some error when producing EXPLAIN output. */ + bool failed_to_produce; + + /* SHOW EXPLAIN will be stored here */ + select_result_explain_buffer *explain_buf; + + /* Query that we've got SHOW EXPLAIN for */ + String query_str; + + /* Overloaded virtual function */ + void call_in_target_thread(); +}; + +/** + Condition pushdown used for INFORMATION_SCHEMA / SHOW queries. + This structure is to implement an optimization when + accessing data dictionary data in the INFORMATION_SCHEMA + or SHOW commands. + When the query contain a TABLE_SCHEMA or TABLE_NAME clause, + narrow the search for data based on the constraints given. +*/ +typedef struct st_lookup_field_values +{ + /** + Value of a TABLE_SCHEMA clause. + Note that this value length may exceed @c NAME_LEN. + @sa wild_db_value + */ + LEX_CSTRING db_value; + /** + Value of a TABLE_NAME clause. + Note that this value length may exceed @c NAME_LEN. + @sa wild_table_value + */ + LEX_CSTRING table_value; + /** + True when @c db_value is a LIKE clause, + false when @c db_value is an '=' clause. + */ + bool wild_db_value; + /** + True when @c table_value is a LIKE clause, + false when @c table_value is an '=' clause. + */ + bool wild_table_value; +} LOOKUP_FIELD_VALUES; + +/* + INFORMATION_SCHEMA: Execution plan for get_all_tables() call +*/ + +class IS_table_read_plan : public Sql_alloc +{ +public: + IS_table_read_plan() : no_rows(false), trivial_show_command(FALSE) {} + + bool no_rows; + /* + For EXPLAIN only: For SHOW KEYS and SHOW COLUMNS, we know which + db_name.table_name will be read, however for some reason we don't + set the fields in this->lookup_field_vals. + In order to not have JOIN::save_explain_data() walking over uninitialized + data, we set trivial_show_command=true. + */ + bool trivial_show_command; + + LOOKUP_FIELD_VALUES lookup_field_vals; + Item *partial_cond; + + bool has_db_lookup_value() + { + return (lookup_field_vals.db_value.length && + !lookup_field_vals.wild_db_value); + } + bool has_table_lookup_value() + { + return (lookup_field_vals.table_value.length && + !lookup_field_vals.wild_table_value); + } +}; + +bool optimize_schema_tables_reads(JOIN *join); +bool optimize_schema_tables_memory_usage(List<TABLE_LIST> &tables); + +/* Handle the ignored database directories list for SHOW/I_S. */ +bool ignore_db_dirs_init(); +void ignore_db_dirs_free(); +void ignore_db_dirs_reset(); +bool ignore_db_dirs_process_additions(); +bool push_ignored_db_dir(const char *path); +extern char *opt_ignore_db_dirs; + +#endif /* SQL_SHOW_H */ |