From a175314c3e5827eb193872241446f2f8f5c9d33c Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sat, 4 May 2024 20:07:14 +0200 Subject: Adding upstream version 1:10.5.12. Signed-off-by: Daniel Baumann --- sql/log_event.h | 5789 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 5789 insertions(+) create mode 100644 sql/log_event.h (limited to 'sql/log_event.h') diff --git a/sql/log_event.h b/sql/log_event.h new file mode 100644 index 00000000..6a224b7b --- /dev/null +++ b/sql/log_event.h @@ -0,0 +1,5789 @@ +/* Copyright (c) 2000, 2014, Oracle and/or its affiliates. + Copyright (c) 2009, 2020, 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 */ + +/** + @addtogroup Replication + @{ + + @file + + @brief Binary log event definitions. This includes generic code + common to all types of log events, as well as specific code for each + type of log event. +*/ + + +#ifndef _log_event_h +#define _log_event_h + +#if defined(USE_PRAGMA_INTERFACE) && defined(MYSQL_SERVER) +#pragma interface /* gcc class implementation */ +#endif + +#include +#include "rpl_constants.h" +#include +#include +#include +#include +#include + +#ifdef MYSQL_CLIENT +#include "sql_const.h" +#include "rpl_utility.h" +#include "hash.h" +#include "rpl_tblmap.h" +#include "sql_string.h" +#endif + +#ifdef MYSQL_SERVER +#include "rpl_record.h" +#include "rpl_reporting.h" +#include "sql_class.h" /* THD */ +#endif + +#include "rpl_gtid.h" + +/* Forward declarations */ +#ifndef MYSQL_CLIENT +class String; +#endif + +#define PREFIX_SQL_LOAD "SQL_LOAD-" +#define LONG_FIND_ROW_THRESHOLD 60 /* seconds */ + +/** + Either assert or return an error. + + In debug build, the condition will be checked, but in non-debug + builds, the error code given will be returned instead. + + @param COND Condition to check + @param ERRNO Error number to return in non-debug builds +*/ +#ifdef DBUG_OFF +#define ASSERT_OR_RETURN_ERROR(COND, ERRNO) \ + do { if (!(COND)) return ERRNO; } while (0) +#else +#define ASSERT_OR_RETURN_ERROR(COND, ERRNO) \ + DBUG_ASSERT(COND) +#endif + +#define LOG_READ_EOF -1 +#define LOG_READ_BOGUS -2 +#define LOG_READ_IO -3 +#define LOG_READ_MEM -5 +#define LOG_READ_TRUNC -6 +#define LOG_READ_TOO_LARGE -7 +#define LOG_READ_CHECKSUM_FAILURE -8 +#define LOG_READ_DECRYPT -9 + +#define LOG_EVENT_OFFSET 4 + +/* + 3 is MySQL 4.x; 4 is MySQL 5.0.0. + Compared to version 3, version 4 has: + - a different Start_log_event, which includes info about the binary log + (sizes of headers); this info is included for better compatibility if the + master's MySQL version is different from the slave's. + - all events have a unique ID (the triplet (server_id, timestamp at server + start, other) to be sure an event is not executed more than once in a + multimaster setup, example: + M1 + / \ + v v + M2 M3 + \ / + v v + S + if a query is run on M1, it will arrive twice on S, so we need that S + remembers the last unique ID it has processed, to compare and know if the + event should be skipped or not. Example of ID: we already have the server id + (4 bytes), plus: + timestamp_when_the_master_started (4 bytes), a counter (a sequence number + which increments every time we write an event to the binlog) (3 bytes). + Q: how do we handle when the counter is overflowed and restarts from 0 ? + + - Query and Load (Create or Execute) events may have a more precise + timestamp (with microseconds), number of matched/affected/warnings rows + and fields of session variables: SQL_MODE, + FOREIGN_KEY_CHECKS, UNIQUE_CHECKS, SQL_AUTO_IS_NULL, the collations and + charsets, the PASSWORD() version (old/new/...). +*/ +#define BINLOG_VERSION 4 + +/* + We could have used SERVER_VERSION_LENGTH, but this introduces an + obscure dependency - if somebody decided to change SERVER_VERSION_LENGTH + this would break the replication protocol +*/ +#define ST_SERVER_VER_LEN 50 + +/* + These are flags and structs to handle all the LOAD DATA INFILE options (LINES + TERMINATED etc). +*/ + +/* + These are flags and structs to handle all the LOAD DATA INFILE options (LINES + TERMINATED etc). + DUMPFILE_FLAG is probably useless (DUMPFILE is a clause of SELECT, not of LOAD + DATA). +*/ +#define DUMPFILE_FLAG 0x1 +#define OPT_ENCLOSED_FLAG 0x2 +#define REPLACE_FLAG 0x4 +#define IGNORE_FLAG 0x8 + +#define FIELD_TERM_EMPTY 0x1 +#define ENCLOSED_EMPTY 0x2 +#define LINE_TERM_EMPTY 0x4 +#define LINE_START_EMPTY 0x8 +#define ESCAPED_EMPTY 0x10 + +#define NUM_LOAD_DELIM_STRS 5 + +/***************************************************************************** + + MySQL Binary Log + + This log consists of events. Each event has a fixed-length header, + possibly followed by a variable length data body. + + The data body consists of an optional fixed length segment (post-header) + and an optional variable length segment. + + See the #defines below for the format specifics. + + The events which really update data are Query_log_event, + Execute_load_query_log_event and old Load_log_event and + Execute_load_log_event events (Execute_load_query is used together with + Begin_load_query and Append_block events to replicate LOAD DATA INFILE. + Create_file/Append_block/Execute_load (which includes Load_log_event) + were used to replicate LOAD DATA before the 5.0.3). + + ****************************************************************************/ + +#define LOG_EVENT_HEADER_LEN 19 /* the fixed header length */ +#define OLD_HEADER_LEN 13 /* the fixed header length in 3.23 */ +/* + Fixed header length, where 4.x and 5.0 agree. That is, 5.0 may have a longer + header (it will for sure when we have the unique event's ID), but at least + the first 19 bytes are the same in 4.x and 5.0. So when we have the unique + event's ID, LOG_EVENT_HEADER_LEN will be something like 26, but + LOG_EVENT_MINIMAL_HEADER_LEN will remain 19. +*/ +#define LOG_EVENT_MINIMAL_HEADER_LEN 19 + +/* event-specific post-header sizes */ +// where 3.23, 4.x and 5.0 agree +#define QUERY_HEADER_MINIMAL_LEN (4 + 4 + 1 + 2) +// where 5.0 differs: 2 for len of N-bytes vars. +#define QUERY_HEADER_LEN (QUERY_HEADER_MINIMAL_LEN + 2) +#define STOP_HEADER_LEN 0 +#define LOAD_HEADER_LEN (4 + 4 + 4 + 1 +1 + 4) +#define SLAVE_HEADER_LEN 0 +#define START_V3_HEADER_LEN (2 + ST_SERVER_VER_LEN + 4) +#define ROTATE_HEADER_LEN 8 // this is FROZEN (the Rotate post-header is frozen) +#define INTVAR_HEADER_LEN 0 +#define CREATE_FILE_HEADER_LEN 4 +#define APPEND_BLOCK_HEADER_LEN 4 +#define EXEC_LOAD_HEADER_LEN 4 +#define DELETE_FILE_HEADER_LEN 4 +#define NEW_LOAD_HEADER_LEN LOAD_HEADER_LEN +#define RAND_HEADER_LEN 0 +#define USER_VAR_HEADER_LEN 0 +#define FORMAT_DESCRIPTION_HEADER_LEN (START_V3_HEADER_LEN+1+LOG_EVENT_TYPES) +#define XID_HEADER_LEN 0 +#define BEGIN_LOAD_QUERY_HEADER_LEN APPEND_BLOCK_HEADER_LEN +#define ROWS_HEADER_LEN_V1 8 +#define TABLE_MAP_HEADER_LEN 8 +#define EXECUTE_LOAD_QUERY_EXTRA_HEADER_LEN (4 + 4 + 4 + 1) +#define EXECUTE_LOAD_QUERY_HEADER_LEN (QUERY_HEADER_LEN + EXECUTE_LOAD_QUERY_EXTRA_HEADER_LEN) +#define INCIDENT_HEADER_LEN 2 +#define HEARTBEAT_HEADER_LEN 0 +#define IGNORABLE_HEADER_LEN 0 +#define ROWS_HEADER_LEN_V2 10 +#define ANNOTATE_ROWS_HEADER_LEN 0 +#define BINLOG_CHECKPOINT_HEADER_LEN 4 +#define GTID_HEADER_LEN 19 +#define GTID_LIST_HEADER_LEN 4 +#define START_ENCRYPTION_HEADER_LEN 0 +#define XA_PREPARE_HEADER_LEN 0 + +/* + Max number of possible extra bytes in a replication event compared to a + packet (i.e. a query) sent from client to master; + First, an auxiliary log_event status vars estimation: +*/ +#define MAX_SIZE_LOG_EVENT_STATUS (1 + 4 /* type, flags2 */ + \ + 1 + 8 /* type, sql_mode */ + \ + 1 + 1 + 255 /* type, length, catalog */ + \ + 1 + 4 /* type, auto_increment */ + \ + 1 + 6 /* type, charset */ + \ + 1 + 1 + 255 /* type, length, time_zone */ + \ + 1 + 2 /* type, lc_time_names_number */ + \ + 1 + 2 /* type, charset_database_number */ + \ + 1 + 8 /* type, table_map_for_update */ + \ + 1 + 4 /* type, master_data_written */ + \ + 1 + 3 /* type, sec_part of NOW() */ + \ + 1 + 16 + 1 + 60/* type, user_len, user, host_len, host */) +#define MAX_LOG_EVENT_HEADER ( /* in order of Query_log_event::write */ \ + LOG_EVENT_HEADER_LEN + /* write_header */ \ + QUERY_HEADER_LEN + /* write_data */ \ + EXECUTE_LOAD_QUERY_EXTRA_HEADER_LEN + /*write_post_header_for_derived */ \ + MAX_SIZE_LOG_EVENT_STATUS + /* status */ \ + NAME_LEN + 1) + +/* + The new option is added to handle large packets that are sent from the master + to the slave. It is used to increase the thd(max_allowed) for both the + DUMP thread on the master and the SQL/IO thread on the slave. +*/ +#define MAX_MAX_ALLOWED_PACKET (1024*1024*1024) + +/* + Event header offsets; + these point to places inside the fixed header. +*/ + +#define EVENT_TYPE_OFFSET 4 +#define SERVER_ID_OFFSET 5 +#define EVENT_LEN_OFFSET 9 +#define LOG_POS_OFFSET 13 +#define FLAGS_OFFSET 17 + +/* start event post-header (for v3 and v4) */ + +#define ST_BINLOG_VER_OFFSET 0 +#define ST_SERVER_VER_OFFSET 2 +#define ST_CREATED_OFFSET (ST_SERVER_VER_OFFSET + ST_SERVER_VER_LEN) +#define ST_COMMON_HEADER_LEN_OFFSET (ST_CREATED_OFFSET + 4) + +/* slave event post-header (this event is never written) */ + +#define SL_MASTER_PORT_OFFSET 8 +#define SL_MASTER_POS_OFFSET 0 +#define SL_MASTER_HOST_OFFSET 10 + +/* query event post-header */ + +#define Q_THREAD_ID_OFFSET 0 +#define Q_EXEC_TIME_OFFSET 4 +#define Q_DB_LEN_OFFSET 8 +#define Q_ERR_CODE_OFFSET 9 +#define Q_STATUS_VARS_LEN_OFFSET 11 +#define Q_DATA_OFFSET QUERY_HEADER_LEN +/* these are codes, not offsets; not more than 256 values (1 byte). */ +#define Q_FLAGS2_CODE 0 +#define Q_SQL_MODE_CODE 1 +/* + Q_CATALOG_CODE is catalog with end zero stored; it is used only by MySQL + 5.0.x where 0<=x<=3. We have to keep it to be able to replicate these + old masters. +*/ +#define Q_CATALOG_CODE 2 +#define Q_AUTO_INCREMENT 3 +#define Q_CHARSET_CODE 4 +#define Q_TIME_ZONE_CODE 5 +/* + Q_CATALOG_NZ_CODE is catalog withOUT end zero stored; it is used by MySQL + 5.0.x where x>=4. Saves one byte in every Query_log_event in binlog, + compared to Q_CATALOG_CODE. The reason we didn't simply re-use + Q_CATALOG_CODE is that then a 5.0.3 slave of this 5.0.x (x>=4) master would + crash (segfault etc) because it would expect a 0 when there is none. +*/ +#define Q_CATALOG_NZ_CODE 6 + +#define Q_LC_TIME_NAMES_CODE 7 + +#define Q_CHARSET_DATABASE_CODE 8 + +#define Q_TABLE_MAP_FOR_UPDATE_CODE 9 + +#define Q_MASTER_DATA_WRITTEN_CODE 10 + +#define Q_INVOKER 11 + +#define Q_HRNOW 128 + +/* Intvar event post-header */ + +/* Intvar event data */ +#define I_TYPE_OFFSET 0 +#define I_VAL_OFFSET 1 + +/* Rand event data */ +#define RAND_SEED1_OFFSET 0 +#define RAND_SEED2_OFFSET 8 + +/* User_var event data */ +#define UV_VAL_LEN_SIZE 4 +#define UV_VAL_IS_NULL 1 +#define UV_VAL_TYPE_SIZE 1 +#define UV_NAME_LEN_SIZE 4 +#define UV_CHARSET_NUMBER_SIZE 4 + +/* Load event post-header */ +#define L_THREAD_ID_OFFSET 0 +#define L_EXEC_TIME_OFFSET 4 +#define L_SKIP_LINES_OFFSET 8 +#define L_TBL_LEN_OFFSET 12 +#define L_DB_LEN_OFFSET 13 +#define L_NUM_FIELDS_OFFSET 14 +#define L_SQL_EX_OFFSET 18 +#define L_DATA_OFFSET LOAD_HEADER_LEN + +/* Rotate event post-header */ +#define R_POS_OFFSET 0 +#define R_IDENT_OFFSET 8 + +/* CF to DF handle LOAD DATA INFILE */ + +/* CF = "Create File" */ +#define CF_FILE_ID_OFFSET 0 +#define CF_DATA_OFFSET CREATE_FILE_HEADER_LEN + +/* AB = "Append Block" */ +#define AB_FILE_ID_OFFSET 0 +#define AB_DATA_OFFSET APPEND_BLOCK_HEADER_LEN + +/* EL = "Execute Load" */ +#define EL_FILE_ID_OFFSET 0 + +/* DF = "Delete File" */ +#define DF_FILE_ID_OFFSET 0 + +/* TM = "Table Map" */ +#define TM_MAPID_OFFSET 0 +#define TM_FLAGS_OFFSET 6 + +/* RW = "RoWs" */ +#define RW_MAPID_OFFSET 0 +#define RW_FLAGS_OFFSET 6 +#define RW_VHLEN_OFFSET 8 +#define RW_V_TAG_LEN 1 +#define RW_V_EXTRAINFO_TAG 0 + +/* ELQ = "Execute Load Query" */ +#define ELQ_FILE_ID_OFFSET QUERY_HEADER_LEN +#define ELQ_FN_POS_START_OFFSET ELQ_FILE_ID_OFFSET + 4 +#define ELQ_FN_POS_END_OFFSET ELQ_FILE_ID_OFFSET + 8 +#define ELQ_DUP_HANDLING_OFFSET ELQ_FILE_ID_OFFSET + 12 + +/* 4 bytes which all binlogs should begin with */ +#define BINLOG_MAGIC (const uchar*) "\xfe\x62\x69\x6e" + +/* + The 2 flags below were useless : + - the first one was never set + - the second one was set in all Rotate events on the master, but not used for + anything useful. + So they are now removed and their place may later be reused for other + flags. Then one must remember that Rotate events in 4.x have + LOG_EVENT_FORCED_ROTATE_F set, so one should not rely on the value of the + replacing flag when reading a Rotate event. + I keep the defines here just to remember what they were. +*/ +#ifdef TO_BE_REMOVED +#define LOG_EVENT_TIME_F 0x1 +#define LOG_EVENT_FORCED_ROTATE_F 0x2 +#endif + +/* + This flag only makes sense for Format_description_log_event. It is set + when the event is written, and *reset* when a binlog file is + closed (yes, it's the only case when MySQL modifies already written + part of binlog). Thus it is a reliable indicator that binlog was + closed correctly. (Stop_log_event is not enough, there's always a + small chance that mysqld crashes in the middle of insert and end of + the binlog would look like a Stop_log_event). + + This flag is used to detect a restart after a crash, and to provide + "unbreakable" binlog. The problem is that on a crash storage engines + rollback automatically, while binlog does not. To solve this we use this + flag and automatically append ROLLBACK to every non-closed binlog (append + virtually, on reading, file itself is not changed). If this flag is found, + mysqlbinlog simply prints "ROLLBACK" Replication master does not abort on + binlog corruption, but takes it as EOF, and replication slave forces a + rollback in this case. + + Note, that old binlogs does not have this flag set, so we get a + a backward-compatible behaviour. +*/ + +#define LOG_EVENT_BINLOG_IN_USE_F 0x1 + +/** + @def LOG_EVENT_THREAD_SPECIFIC_F + + If the query depends on the thread (for example: TEMPORARY TABLE). + Currently this is used by mysqlbinlog to know it must print + SET @@PSEUDO_THREAD_ID=xx; before the query (it would not hurt to print it + for every query but this would be slow). +*/ +#define LOG_EVENT_THREAD_SPECIFIC_F 0x4 + +/** + @def LOG_EVENT_SUPPRESS_USE_F + + Suppress the generation of 'USE' statements before the actual + statement. This flag should be set for any events that does not need + the current database set to function correctly. Most notable cases + are 'CREATE DATABASE' and 'DROP DATABASE'. + + This flags should only be used in exceptional circumstances, since + it introduce a significant change in behaviour regarding the + replication logic together with the flags --binlog-do-db and + --replicated-do-db. + */ +#define LOG_EVENT_SUPPRESS_USE_F 0x8 + +/* + Note: this is a place holder for the flag + LOG_EVENT_UPDATE_TABLE_MAP_VERSION_F (0x10), which is not used any + more, please do not reused this value for other flags. + */ + +/** + @def LOG_EVENT_ARTIFICIAL_F + + Artificial events are created arbitrarily and not written to binary + log + + These events should not update the master log position when slave + SQL thread executes them. +*/ +#define LOG_EVENT_ARTIFICIAL_F 0x20 + +/** + @def LOG_EVENT_RELAY_LOG_F + + Events with this flag set are created by slave IO thread and written + to relay log +*/ +#define LOG_EVENT_RELAY_LOG_F 0x40 + +/** + @def LOG_EVENT_IGNORABLE_F + + For an event, 'e', carrying a type code, that a slave, + 's', does not recognize, 's' will check 'e' for + LOG_EVENT_IGNORABLE_F, and if the flag is set, then 'e' + is ignored. Otherwise, 's' acknowledges that it has + found an unknown event in the relay log. +*/ +#define LOG_EVENT_IGNORABLE_F 0x80 + +/** + @def LOG_EVENT_SKIP_REPLICATION_F + + Flag set by application creating the event (with @@skip_replication); the + slave will skip replication of such events if + --replicate-events-marked-for-skip is not set to REPLICATE. + + This is a MariaDB flag; we allocate it from the end of the available + values to reduce risk of conflict with new MySQL flags. +*/ +#define LOG_EVENT_SKIP_REPLICATION_F 0x8000 + + +/** + @def OPTIONS_WRITTEN_TO_BIN_LOG + + OPTIONS_WRITTEN_TO_BIN_LOG are the bits of thd->options which must + be written to the binlog. OPTIONS_WRITTEN_TO_BIN_LOG could be + written into the Format_description_log_event, so that if later we + don't want to replicate a variable we did replicate, or the + contrary, it's doable. But it should not be too hard to decide once + for all of what we replicate and what we don't, among the fixed 32 + bits of thd->options. + + I (Guilhem) have read through every option's usage, and it looks + like OPTION_AUTO_IS_NULL and OPTION_NO_FOREIGN_KEYS are the only + ones which alter how the query modifies the table. It's good to + replicate OPTION_RELAXED_UNIQUE_CHECKS too because otherwise, the + slave may insert data slower than the master, in InnoDB. + OPTION_BIG_SELECTS is not needed (the slave thread runs with + max_join_size=HA_POS_ERROR) and OPTION_BIG_TABLES is not needed + either, as the manual says (because a too big in-memory temp table + is automatically written to disk). +*/ +#define OPTIONS_WRITTEN_TO_BIN_LOG \ + (OPTION_AUTO_IS_NULL | OPTION_NO_FOREIGN_KEY_CHECKS | \ + OPTION_RELAXED_UNIQUE_CHECKS | OPTION_NOT_AUTOCOMMIT | OPTION_IF_EXISTS) + +/* Shouldn't be defined before */ +#define EXPECTED_OPTIONS \ + ((1ULL << 14) | (1ULL << 26) | (1ULL << 27) | (1ULL << 19) | (1ULL << 28)) + +#if OPTIONS_WRITTEN_TO_BIN_LOG != EXPECTED_OPTIONS +#error OPTIONS_WRITTEN_TO_BIN_LOG must NOT change their values! +#endif +#undef EXPECTED_OPTIONS /* You shouldn't use this one */ + +#define CHECKSUM_CRC32_SIGNATURE_LEN 4 +/** + defined statically while there is just one alg implemented +*/ +#define BINLOG_CHECKSUM_LEN CHECKSUM_CRC32_SIGNATURE_LEN +#define BINLOG_CHECKSUM_ALG_DESC_LEN 1 /* 1 byte checksum alg descriptor */ + +/* + These are capability numbers for MariaDB slave servers. + + Newer MariaDB slaves set this to inform the master about their capabilities. + This allows the master to decide which events it can send to the slave + without breaking replication on old slaves that maybe do not understand + all events from newer masters. + + As new releases are backwards compatible, a given capability implies also + all capabilities with smaller number. + + Older MariaDB slaves and other MySQL slave servers do not set this, so they + are recorded with capability 0. +*/ + +/* MySQL or old MariaDB slave with no announced capability. */ +#define MARIA_SLAVE_CAPABILITY_UNKNOWN 0 +/* MariaDB >= 5.3, which understands ANNOTATE_ROWS_EVENT. */ +#define MARIA_SLAVE_CAPABILITY_ANNOTATE 1 +/* + MariaDB >= 5.5. This version has the capability to tolerate events omitted + from the binlog stream without breaking replication (MySQL slaves fail + because they mis-compute the offsets into the master's binlog). +*/ +#define MARIA_SLAVE_CAPABILITY_TOLERATE_HOLES 2 +/* MariaDB >= 10.0, which knows about binlog_checkpoint_log_event. */ +#define MARIA_SLAVE_CAPABILITY_BINLOG_CHECKPOINT 3 +/* MariaDB >= 10.0.1, which knows about global transaction id events. */ +#define MARIA_SLAVE_CAPABILITY_GTID 4 + +/* Our capability. */ +#define MARIA_SLAVE_CAPABILITY_MINE MARIA_SLAVE_CAPABILITY_GTID + + +/* + When the size of 'log_pos' within Heartbeat_log_event exceeds UINT32_MAX it + cannot be accommodated in common_header, as 'log_pos' is of 4 bytes size. In + such cases, sub_header, of size 8 bytes will hold larger 'log_pos' value. +*/ +#define HB_SUB_HEADER_LEN 8 + + +/** + @enum Log_event_type + + Enumeration type for the different types of log events. +*/ +enum Log_event_type +{ + /* + Every time you update this enum (when you add a type), you have to + fix Format_description_log_event::Format_description_log_event(). + */ + UNKNOWN_EVENT= 0, + START_EVENT_V3= 1, + QUERY_EVENT= 2, + STOP_EVENT= 3, + ROTATE_EVENT= 4, + INTVAR_EVENT= 5, + LOAD_EVENT= 6, + SLAVE_EVENT= 7, + CREATE_FILE_EVENT= 8, + APPEND_BLOCK_EVENT= 9, + EXEC_LOAD_EVENT= 10, + DELETE_FILE_EVENT= 11, + /* + NEW_LOAD_EVENT is like LOAD_EVENT except that it has a longer + sql_ex, allowing multibyte TERMINATED BY etc; both types share the + same class (Load_log_event) + */ + NEW_LOAD_EVENT= 12, + RAND_EVENT= 13, + USER_VAR_EVENT= 14, + FORMAT_DESCRIPTION_EVENT= 15, + XID_EVENT= 16, + BEGIN_LOAD_QUERY_EVENT= 17, + EXECUTE_LOAD_QUERY_EVENT= 18, + + TABLE_MAP_EVENT = 19, + + /* + These event numbers were used for 5.1.0 to 5.1.15 and are + therefore obsolete. + */ + PRE_GA_WRITE_ROWS_EVENT = 20, + PRE_GA_UPDATE_ROWS_EVENT = 21, + PRE_GA_DELETE_ROWS_EVENT = 22, + + /* + These event numbers are used from 5.1.16 until mysql-5.6.6, + and in MariaDB + */ + WRITE_ROWS_EVENT_V1 = 23, + UPDATE_ROWS_EVENT_V1 = 24, + DELETE_ROWS_EVENT_V1 = 25, + + /* + Something out of the ordinary happened on the master + */ + INCIDENT_EVENT= 26, + + /* + Heartbeat event to be send by master at its idle time + to ensure master's online status to slave + */ + HEARTBEAT_LOG_EVENT= 27, + + /* + In some situations, it is necessary to send over ignorable + data to the slave: data that a slave can handle in case there + is code for handling it, but which can be ignored if it is not + recognized. + + These mysql-5.6 events are not recognized (and ignored) by MariaDB + */ + IGNORABLE_LOG_EVENT= 28, + ROWS_QUERY_LOG_EVENT= 29, + + /* Version 2 of the Row events, generated only by mysql-5.6.6+ */ + WRITE_ROWS_EVENT = 30, + UPDATE_ROWS_EVENT = 31, + DELETE_ROWS_EVENT = 32, + + /* MySQL 5.6 GTID events, ignored by MariaDB */ + GTID_LOG_EVENT= 33, + ANONYMOUS_GTID_LOG_EVENT= 34, + PREVIOUS_GTIDS_LOG_EVENT= 35, + + /* MySQL 5.7 events, ignored by MariaDB */ + TRANSACTION_CONTEXT_EVENT= 36, + VIEW_CHANGE_EVENT= 37, + /* not ignored */ + XA_PREPARE_LOG_EVENT= 38, + + /* + Add new events here - right above this comment! + Existing events (except ENUM_END_EVENT) should never change their numbers + */ + + /* New MySQL/Sun events are to be added right above this comment */ + MYSQL_EVENTS_END, + + MARIA_EVENTS_BEGIN= 160, + /* New Maria event numbers start from here */ + ANNOTATE_ROWS_EVENT= 160, + /* + Binlog checkpoint event. Used for XA crash recovery on the master, not used + in replication. + A binlog checkpoint event specifies a binlog file such that XA crash + recovery can start from that file - and it is guaranteed to find all XIDs + that are prepared in storage engines but not yet committed. + */ + BINLOG_CHECKPOINT_EVENT= 161, + /* + Gtid event. For global transaction ID, used to start a new event group, + instead of the old BEGIN query event, and also to mark stand-alone + events. + */ + GTID_EVENT= 162, + /* + Gtid list event. Logged at the start of every binlog, to record the + current replication state. This consists of the last GTID seen for + each replication domain. + */ + GTID_LIST_EVENT= 163, + + START_ENCRYPTION_EVENT= 164, + + /* + Compressed binlog event. + + Note that the order between WRITE/UPDATE/DELETE events is significant; + this is so that we can convert from the compressed to the uncompressed + event type with (type-WRITE_ROWS_COMPRESSED_EVENT + WRITE_ROWS_EVENT) + and similar for _V1. + */ + QUERY_COMPRESSED_EVENT = 165, + WRITE_ROWS_COMPRESSED_EVENT_V1 = 166, + UPDATE_ROWS_COMPRESSED_EVENT_V1 = 167, + DELETE_ROWS_COMPRESSED_EVENT_V1 = 168, + WRITE_ROWS_COMPRESSED_EVENT = 169, + UPDATE_ROWS_COMPRESSED_EVENT = 170, + DELETE_ROWS_COMPRESSED_EVENT = 171, + + /* Add new MariaDB events here - right above this comment! */ + + ENUM_END_EVENT /* end marker */ +}; + + +/* + Bit flags for what has been writting to cache. Used to + discard logs with table map events but not row events and + nothing else important. This is stored by cache. +*/ + +enum enum_logged_status +{ + LOGGED_TABLE_MAP= 1, + LOGGED_ROW_EVENT= 2, + LOGGED_NO_DATA= 4, + LOGGED_CRITICAL= 8 +}; + +static inline bool LOG_EVENT_IS_QUERY(enum Log_event_type type) +{ + return type == QUERY_EVENT || type == QUERY_COMPRESSED_EVENT; +} + + +static inline bool LOG_EVENT_IS_WRITE_ROW(enum Log_event_type type) +{ + return type == WRITE_ROWS_EVENT || type == WRITE_ROWS_EVENT_V1 || + type == WRITE_ROWS_COMPRESSED_EVENT || + type == WRITE_ROWS_COMPRESSED_EVENT_V1; +} + + +static inline bool LOG_EVENT_IS_UPDATE_ROW(enum Log_event_type type) +{ + return type == UPDATE_ROWS_EVENT || type == UPDATE_ROWS_EVENT_V1 || + type == UPDATE_ROWS_COMPRESSED_EVENT || + type == UPDATE_ROWS_COMPRESSED_EVENT_V1; +} + + +static inline bool LOG_EVENT_IS_DELETE_ROW(enum Log_event_type type) +{ + return type == DELETE_ROWS_EVENT || type == DELETE_ROWS_EVENT_V1 || + type == DELETE_ROWS_COMPRESSED_EVENT || + type == DELETE_ROWS_COMPRESSED_EVENT_V1; +} + + +static inline bool LOG_EVENT_IS_ROW_COMPRESSED(enum Log_event_type type) +{ + return type == WRITE_ROWS_COMPRESSED_EVENT || + type == WRITE_ROWS_COMPRESSED_EVENT_V1 || + type == UPDATE_ROWS_COMPRESSED_EVENT || + type == UPDATE_ROWS_COMPRESSED_EVENT_V1 || + type == DELETE_ROWS_COMPRESSED_EVENT || + type == DELETE_ROWS_COMPRESSED_EVENT_V1; +} + + +static inline bool LOG_EVENT_IS_ROW_V2(enum Log_event_type type) +{ + return (type >= WRITE_ROWS_EVENT && type <= DELETE_ROWS_EVENT) || + (type >= WRITE_ROWS_COMPRESSED_EVENT && type <= DELETE_ROWS_COMPRESSED_EVENT); +} + + +/* + The number of types we handle in Format_description_log_event (UNKNOWN_EVENT + is not to be handled, it does not exist in binlogs, it does not have a + format). +*/ +#define LOG_EVENT_TYPES (ENUM_END_EVENT-1) + +enum Int_event_type +{ + INVALID_INT_EVENT = 0, LAST_INSERT_ID_EVENT = 1, INSERT_ID_EVENT = 2 +}; + +#ifdef MYSQL_SERVER +class String; +class MYSQL_BIN_LOG; +class THD; +#endif + +class Format_description_log_event; +class Relay_log_info; +class binlog_cache_data; + +bool copy_event_cache_to_file_and_reinit(IO_CACHE *cache, FILE *file); + +#ifdef MYSQL_CLIENT +enum enum_base64_output_mode { + BASE64_OUTPUT_NEVER= 0, + BASE64_OUTPUT_AUTO= 1, + BASE64_OUTPUT_UNSPEC= 2, + BASE64_OUTPUT_DECODE_ROWS= 3, + /* insert new output modes here */ + BASE64_OUTPUT_MODE_COUNT +}; + +bool copy_event_cache_to_string_and_reinit(IO_CACHE *cache, LEX_STRING *to); + +/* + A structure for mysqlbinlog to know how to print events + + This structure is passed to the event's print() methods, + + There are two types of settings stored here: + 1. Last db, flags2, sql_mode etc comes from the last printed event. + They are stored so that only the necessary USE and SET commands + are printed. + 2. Other information on how to print the events, e.g. short_form, + hexdump_from. These are not dependent on the last event. +*/ +typedef struct st_print_event_info +{ + /* + Settings for database, sql_mode etc that comes from the last event + that was printed. We cache these so that we don't have to print + them if they are unchanged. + */ + char db[FN_REFLEN+1]; // TODO: make this a LEX_STRING when thd->db is + char charset[6]; // 3 variables, each of them storable in 2 bytes + char time_zone_str[MAX_TIME_ZONE_NAME_LENGTH]; + char delimiter[16]; + sql_mode_t sql_mode; /* must be same as THD.variables.sql_mode */ + my_thread_id thread_id; + ulonglong row_events; + ulong auto_increment_increment, auto_increment_offset; + uint lc_time_names_number; + uint charset_database_number; + uint verbose; + uint32 flags2; + uint32 server_id; + uint32 domain_id; + uint8 common_header_len; + enum_base64_output_mode base64_output_mode; + my_off_t hexdump_from; + + table_mapping m_table_map; + table_mapping m_table_map_ignored; + bool flags2_inited; + bool sql_mode_inited; + bool charset_inited; + bool thread_id_printed; + bool server_id_printed; + bool domain_id_printed; + bool allow_parallel; + bool allow_parallel_printed; + bool found_row_event; + bool print_row_count; + static const uint max_delimiter_size= 16; + /* Settings on how to print the events */ + bool short_form; + /* + This is set whenever a Format_description_event is printed. + Later, when an event is printed in base64, this flag is tested: if + no Format_description_event has been seen, it is unsafe to print + the base64 event, so an error message is generated. + */ + bool printed_fd_event; + /* + Track when @@skip_replication changes so we need to output a SET + statement for it. + */ + bool skip_replication; + bool print_table_metadata; + + /* + These two caches are used by the row-based replication events to + collect the header information and the main body of the events + making up a statement. + */ + IO_CACHE head_cache; + IO_CACHE body_cache; + IO_CACHE tail_cache; +#ifdef WHEN_FLASHBACK_REVIEW_READY + /* Storing the SQL for reviewing */ + IO_CACHE review_sql_cache; +#endif + FILE *file; + st_print_event_info(); + + ~st_print_event_info() { + close_cached_file(&head_cache); + close_cached_file(&body_cache); + close_cached_file(&tail_cache); +#ifdef WHEN_FLASHBACK_REVIEW_READY + close_cached_file(&review_sql_cache); +#endif + } + bool init_ok() /* tells if construction was successful */ + { return my_b_inited(&head_cache) && my_b_inited(&body_cache) +#ifdef WHEN_FLASHBACK_REVIEW_READY + && my_b_inited(&review_sql_cache) +#endif + ; } + void flush_for_error() + { + if (!copy_event_cache_to_file_and_reinit(&head_cache, file)) + copy_event_cache_to_file_and_reinit(&body_cache, file); + fflush(file); + } +} PRINT_EVENT_INFO; +#endif + +/** + This class encapsulates writing of Log_event objects to IO_CACHE. + Automatically calculates the checksum and encrypts the data, if necessary. +*/ + +class Log_event_writer +{ + /* Log_event_writer is updated when ctx is set */ + int (Log_event_writer::*encrypt_or_write)(const uchar *pos, size_t len); +public: + ulonglong bytes_written; + void *ctx; ///< Encryption context or 0 if no encryption is needed + uint checksum_len; + int write(Log_event *ev); + int write_header(uchar *pos, size_t len); + int write_data(const uchar *pos, size_t len); + int write_footer(); + my_off_t pos() { return my_b_safe_tell(file); } + void add_status(enum_logged_status status); + void set_incident(); + void set_encrypted_writer() + { encrypt_or_write= &Log_event_writer::encrypt_and_write; } + + Log_event_writer(IO_CACHE *file_arg, binlog_cache_data *cache_data_arg, + Binlog_crypt_data *cr= 0) + :encrypt_or_write(&Log_event_writer::write_internal), + bytes_written(0), ctx(0), + file(file_arg), cache_data(cache_data_arg), crypto(cr) { } + +private: + IO_CACHE *file; + binlog_cache_data *cache_data; + /** + Placeholder for event checksum while writing to binlog. + */ + ha_checksum crc; + /** + Encryption data (key, nonce). Only used if ctx != 0. + */ + Binlog_crypt_data *crypto; + /** + Event length to be written into the next encrypted block + */ + uint event_len; + int write_internal(const uchar *pos, size_t len); + int encrypt_and_write(const uchar *pos, size_t len); + int maybe_write_event_len(uchar *pos, size_t len); +}; + +/** + the struct aggregates two parameters that identify an event + uniquely in scope of communication of a particular master and slave couple. + I.e there can not be 2 events from the same staying connected master which + have the same coordinates. + @note + Such identifier is not yet unique generally as the event originating master + is resettable. Also the crashed master can be replaced with some other. +*/ +typedef struct event_coordinates +{ + char * file_name; // binlog file name (directories stripped) + my_off_t pos; // event's position in the binlog file +} LOG_POS_COORD; + +/** + @class Log_event + + This is the abstract base class for binary log events. + + @section Log_event_binary_format Binary Format + + Any @c Log_event saved on disk consists of the following three + components. + + - Common-Header + - Post-Header + - Body + + The Common-Header, documented in the table @ref Table_common_header + "below", always has the same form and length within one version of + MySQL. Each event type specifies a format and length of the + Post-Header. The length of the Common-Header is the same for all + events of the same type. The Body may be of different format and + length even for different events of the same type. The binary + formats of Post-Header and Body are documented separately in each + subclass. The binary format of Common-Header is as follows. + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + +
Common-Header
NameFormatDescription
timestamp4 byte unsigned integerThe time when the query started, in seconds since 1970. +
type1 byte enumerationSee enum #Log_event_type.
server_id4 byte unsigned integerServer ID of the server that created the event.
total_size4 byte unsigned integerThe total size of this event, in bytes. In other words, this + is the sum of the sizes of Common-Header, Post-Header, and Body. +
master_position4 byte unsigned integerThe position of the next event in the master binary log, in + bytes from the beginning of the file. In a binlog that is not a + relay log, this is just the position of the next event, in bytes + from the beginning of the file. In a relay log, this is + the position of the next event in the master's binlog. +
flags2 byte bitfieldSee Log_event::flags.
+ + Summing up the numbers above, we see that the total size of the + common header is 19 bytes. + + @subsection Log_event_format_of_atomic_primitives Format of Atomic Primitives + + - All numbers, whether they are 16-, 24-, 32-, or 64-bit numbers, + are stored in little endian, i.e., the least significant byte first, + unless otherwise specified. + + @anchor packed_integer + - Some events use a special format for efficient representation of + unsigned integers, called Packed Integer. A Packed Integer has the + capacity of storing up to 8-byte integers, while small integers + still can use 1, 3, or 4 bytes. The value of the first byte + determines how to read the number, according to the following table: + + + + + + + + + + + + + + + + + + + + + + + + + + + + + +
Format of Packed Integer
First byteFormat
0-250The first byte is the number (in the range 0-250), and no more + bytes are used.
252Two more bytes are used. The number is in the range + 251-0xffff.
253Three more bytes are used. The number is in the range + 0xffff-0xffffff.
254Eight more bytes are used. The number is in the range + 0xffffff-0xffffffffffffffff.
+ + - Strings are stored in various formats. The format of each string + is documented separately. +*/ +class Log_event +{ +public: + /** + Enumeration of what kinds of skipping (and non-skipping) that can + occur when the slave executes an event. + + @see shall_skip + @see do_shall_skip + */ + enum enum_skip_reason { + /** + Don't skip event. + */ + EVENT_SKIP_NOT, + + /** + Skip event by ignoring it. + + This means that the slave skip counter will not be changed. + */ + EVENT_SKIP_IGNORE, + + /** + Skip event and decrease skip counter. + */ + EVENT_SKIP_COUNT + }; + + enum enum_event_cache_type + { + EVENT_INVALID_CACHE, + /* + If possible the event should use a non-transactional cache before + being flushed to the binary log. This means that it must be flushed + right after its correspondent statement is completed. + */ + EVENT_STMT_CACHE, + /* + The event should use a transactional cache before being flushed to + the binary log. This means that it must be flushed upon commit or + rollback. + */ + EVENT_TRANSACTIONAL_CACHE, + /* + The event must be written directly to the binary log without going + through a cache. + */ + EVENT_NO_CACHE, + /** + If there is a need for different types, introduce them before this. + */ + EVENT_CACHE_COUNT + }; + + /* + The following type definition is to be used whenever data is placed + and manipulated in a common buffer. Use this typedef for buffers + that contain data containing binary and character data. + */ + typedef unsigned char Byte; + + /* + The offset in the log where this event originally appeared (it is + preserved in relay logs, making SHOW SLAVE STATUS able to print + coordinates of the event in the master's binlog). Note: when a + transaction is written by the master to its binlog (wrapped in + BEGIN/COMMIT) the log_pos of all the queries it contains is the + one of the BEGIN (this way, when one does SHOW SLAVE STATUS it + sees the offset of the BEGIN, which is logical as rollback may + occur), except the COMMIT query which has its real offset. + */ + my_off_t log_pos; + /* + A temp buffer for read_log_event; it is later analysed according to the + event's type, and its content is distributed in the event-specific fields. + */ + char *temp_buf; + + /* + TRUE <=> this event 'owns' temp_buf and should call my_free() when done + with it + */ + bool event_owns_temp_buf; + + /* + Timestamp on the master(for debugging and replication of + NOW()/TIMESTAMP). It is important for queries and LOAD DATA + INFILE. This is set at the event's creation time, except for Query + and Load (et al.) events where this is set at the query's + execution time, which guarantees good replication (otherwise, we + could have a query and its event with different timestamps). + */ + my_time_t when; + ulong when_sec_part; + /* The number of seconds the query took to run on the master. */ + ulong exec_time; + /* Number of bytes written by write() function */ + size_t data_written; + + /* + The master's server id (is preserved in the relay log; used to + prevent from infinite loops in circular replication). + */ + uint32 server_id; + + /** + Some 16 flags. See the definitions above for LOG_EVENT_TIME_F, + LOG_EVENT_FORCED_ROTATE_F, LOG_EVENT_THREAD_SPECIFIC_F, + LOG_EVENT_SUPPRESS_USE_F, and LOG_EVENT_SKIP_REPLICATION_F for notes. + */ + uint16 flags; + + enum_event_cache_type cache_type; + + /** + A storage to cache the global system variable's value. + Handling of a separate event will be governed its member. + */ + ulong slave_exec_mode; + + Log_event_writer *writer; + +#ifdef MYSQL_SERVER + THD* thd; + + Log_event(); + Log_event(THD* thd_arg, uint16 flags_arg, bool is_transactional); + + /* + init_show_field_list() prepares the column names and types for the + output of SHOW BINLOG EVENTS; it is used only by SHOW BINLOG + EVENTS. + */ + static void init_show_field_list(THD *thd, List* field_list); +#ifdef HAVE_REPLICATION + int net_send(Protocol *protocol, const char* log_name, my_off_t pos); + + /* + pack_info() is used by SHOW BINLOG EVENTS; as print() it prepares and sends + a string to display to the user, so it resembles print(). + */ + + virtual void pack_info(Protocol *protocol); + +#endif /* HAVE_REPLICATION */ + virtual const char* get_db() + { + return thd ? thd->db.str : 0; + } +#else + Log_event() : temp_buf(0), when(0), flags(0) {} + ha_checksum crc; + /* print*() functions are used by mysqlbinlog */ + virtual bool print(FILE* file, PRINT_EVENT_INFO* print_event_info) = 0; + bool print_timestamp(IO_CACHE* file, time_t *ts = 0); + bool print_header(IO_CACHE* file, PRINT_EVENT_INFO* print_event_info, + bool is_more); + bool print_base64(IO_CACHE* file, PRINT_EVENT_INFO* print_event_info, + bool do_print_encoded); +#endif /* MYSQL_SERVER */ + + /* The following code used for Flashback */ +#ifdef MYSQL_CLIENT + my_bool is_flashback; + my_bool need_flashback_review; + String output_buf; // Storing the event output +#ifdef WHEN_FLASHBACK_REVIEW_READY + String m_review_dbname; + String m_review_tablename; + + void set_review_dbname(const char *name) + { + if (name) + { + m_review_dbname.free(); + m_review_dbname.append(name); + } + } + void set_review_tablename(const char *name) + { + if (name) + { + m_review_tablename.free(); + m_review_tablename.append(name); + } + } + const char *get_review_dbname() const { return m_review_dbname.ptr(); } + const char *get_review_tablename() const { return m_review_tablename.ptr(); } +#endif +#endif + + /* + read_log_event() functions read an event from a binlog or relay + log; used by SHOW BINLOG EVENTS, the binlog_dump thread on the + master (reads master's binlog), the slave IO thread (reads the + event sent by binlog_dump), the slave SQL thread (reads the event + from the relay log). If mutex is 0, the read will proceed without + mutex. We need the description_event to be able to parse the + event (to know the post-header's size); in fact in read_log_event + we detect the event's type, then call the specific event's + constructor and pass description_event as an argument. + */ + static Log_event* read_log_event(IO_CACHE* file, + const Format_description_log_event + *description_event, + my_bool crc_check); + + /** + Reads an event from a binlog or relay log. Used by the dump thread + this method reads the event into a raw buffer without parsing it. + + @Note If mutex is 0, the read will proceed without mutex. + + @Note If a log name is given than the method will check if the + given binlog is still active. + + @param[in] file log file to be read + @param[out] packet packet to hold the event + @param[in] checksum_alg_arg verify the event checksum using this + algorithm (or don't if it's + use BINLOG_CHECKSUM_ALG_OFF) + + @retval 0 success + @retval LOG_READ_EOF end of file, nothing was read + @retval LOG_READ_BOGUS malformed event + @retval LOG_READ_IO io error while reading + @retval LOG_READ_MEM packet memory allocation failed + @retval LOG_READ_TRUNC only a partial event could be read + @retval LOG_READ_TOO_LARGE event too large + */ + static int read_log_event(IO_CACHE* file, String* packet, + const Format_description_log_event *fdle, + enum enum_binlog_checksum_alg checksum_alg_arg); + /* + The value is set by caller of FD constructor and + Log_event::write_header() for the rest. + In the FD case it's propagated into the last byte + of post_header_len[] at FD::write(). + On the slave side the value is assigned from post_header_len[last] + of the last seen FD event. + */ + enum enum_binlog_checksum_alg checksum_alg; + + static void *operator new(size_t size) + { + extern PSI_memory_key key_memory_log_event; + return my_malloc(key_memory_log_event, size, MYF(MY_WME|MY_FAE)); + } + + static void operator delete(void *ptr, size_t) + { + my_free(ptr); + } + + /* Placement version of the above operators */ + static void *operator new(size_t, void* ptr) { return ptr; } + static void operator delete(void*, void*) { } + +#ifdef MYSQL_SERVER + bool write_header(size_t event_data_length); + bool write_data(const uchar *buf, size_t data_length) + { return writer->write_data(buf, data_length); } + bool write_data(const char *buf, size_t data_length) + { return write_data((uchar*)buf, data_length); } + bool write_footer() + { return writer->write_footer(); } + + my_bool need_checksum(); + + virtual bool write() + { + return write_header(get_data_size()) || write_data_header() || + write_data_body() || write_footer(); + } + virtual bool write_data_header() + { return 0; } + virtual bool write_data_body() + { return 0; } + + /* Return start of query time or current time */ + inline my_time_t get_time() + { + THD *tmp_thd; + if (when) + return when; + if (thd) + { + when= thd->start_time; + when_sec_part= thd->start_time_sec_part; + return when; + } + /* thd will only be 0 here at time of log creation */ + if ((tmp_thd= current_thd)) + { + when= tmp_thd->start_time; + when_sec_part= tmp_thd->start_time_sec_part; + return when; + } + my_hrtime_t hrtime= my_hrtime(); + when= hrtime_to_my_time(hrtime); + when_sec_part= hrtime_sec_part(hrtime); + return when; + } +#endif + virtual Log_event_type get_type_code() = 0; + virtual enum_logged_status logged_status() { return LOGGED_CRITICAL; } + virtual bool is_valid() const = 0; + virtual my_off_t get_header_len(my_off_t len) { return len; } + void set_artificial_event() { flags |= LOG_EVENT_ARTIFICIAL_F; } + void set_relay_log_event() { flags |= LOG_EVENT_RELAY_LOG_F; } + bool is_artificial_event() const { return flags & LOG_EVENT_ARTIFICIAL_F; } + bool is_relay_log_event() const { return flags & LOG_EVENT_RELAY_LOG_F; } + inline bool use_trans_cache() const + { + return (cache_type == Log_event::EVENT_TRANSACTIONAL_CACHE); + } + inline void set_direct_logging() + { + cache_type = Log_event::EVENT_NO_CACHE; + } + inline bool use_direct_logging() + { + return (cache_type == Log_event::EVENT_NO_CACHE); + } + Log_event(const char* buf, const Format_description_log_event + *description_event); + virtual ~Log_event() { free_temp_buf();} + void register_temp_buf(char* buf, bool must_free) + { + temp_buf= buf; + event_owns_temp_buf= must_free; + } + void free_temp_buf() + { + if (temp_buf) + { + if (event_owns_temp_buf) + my_free(temp_buf); + temp_buf = 0; + } + } + /* + Get event length for simple events. For complicated events the length + is calculated during write() + */ + virtual int get_data_size() { return 0;} + static Log_event* read_log_event(const char* buf, uint event_len, + const char **error, + const Format_description_log_event + *description_event, my_bool crc_check); + /** + Returns the human readable name of the given event type. + */ + static const char* get_type_str(Log_event_type type); + /** + Returns the human readable name of this event's type. + */ + const char* get_type_str(); + +#if defined(MYSQL_SERVER) && defined(HAVE_REPLICATION) + + /** + Apply the event to the database. + + This function represents the public interface for applying an + event. + + @see do_apply_event + */ + int apply_event(rpl_group_info *rgi) + { + int res; + THD_STAGE_INFO(thd, stage_apply_event); + res= do_apply_event(rgi); + THD_STAGE_INFO(thd, stage_after_apply_event); + return res; + } + + + /** + Update the relay log position. + + This function represents the public interface for "stepping over" + the event and will update the relay log information. + + @see do_update_pos + */ + int update_pos(rpl_group_info *rgi) + { + return do_update_pos(rgi); + } + + /** + Decide if the event shall be skipped, and the reason for skipping + it. + + @see do_shall_skip + */ + enum_skip_reason shall_skip(rpl_group_info *rgi) + { + return do_shall_skip(rgi); + } + + + /* + Check if an event is non-final part of a stand-alone event group, + such as Intvar_log_event (such events should be processed as part + of the following event group, not individually). + See also is_part_of_group() + */ + static bool is_part_of_group(enum Log_event_type ev_type) + { + switch (ev_type) + { + case GTID_EVENT: + case INTVAR_EVENT: + case RAND_EVENT: + case USER_VAR_EVENT: + case TABLE_MAP_EVENT: + case ANNOTATE_ROWS_EVENT: + return true; + case DELETE_ROWS_EVENT: + case UPDATE_ROWS_EVENT: + case WRITE_ROWS_EVENT: + /* + ToDo: also check for non-final Rows_log_event (though such events + are usually in a BEGIN-COMMIT group). + */ + default: + return false; + } + } + /* + Same as above, but works on the object. In addition this is true for all + rows event except the last one. + */ + virtual bool is_part_of_group() { return 0; } + + static bool is_group_event(enum Log_event_type ev_type) + { + switch (ev_type) + { + case START_EVENT_V3: + case STOP_EVENT: + case ROTATE_EVENT: + case SLAVE_EVENT: + case FORMAT_DESCRIPTION_EVENT: + case INCIDENT_EVENT: + case HEARTBEAT_LOG_EVENT: + case BINLOG_CHECKPOINT_EVENT: + case GTID_LIST_EVENT: + case START_ENCRYPTION_EVENT: + return false; + + default: + return true; + } + } + +protected: + + /** + Helper function to ignore an event w.r.t. the slave skip counter. + + This function can be used inside do_shall_skip() for functions + that cannot end a group. If the slave skip counter is 1 when + seeing such an event, the event shall be ignored, the counter + left intact, and processing continue with the next event. + + A typical usage is: + @code + enum_skip_reason do_shall_skip(rpl_group_info *rgi) { + return continue_group(rgi); + } + @endcode + + @return Skip reason + */ + enum_skip_reason continue_group(rpl_group_info *rgi); + + /** + Primitive to apply an event to the database. + + This is where the change to the database is made. + + @note The primitive is protected instead of private, since there + is a hierarchy of actions to be performed in some cases. + + @see Format_description_log_event::do_apply_event() + + @param rli Pointer to relay log info structure + + @retval 0 Event applied successfully + @retval errno Error code if event application failed + */ + virtual int do_apply_event(rpl_group_info *rgi) + { + return 0; /* Default implementation does nothing */ + } + + + /** + Advance relay log coordinates. + + This function is called to advance the relay log coordinates to + just after the event. It is essential that both the relay log + coordinate and the group log position is updated correctly, since + this function is used also for skipping events. + + Normally, each implementation of do_update_pos() shall: + + - Update the event position to refer to the position just after + the event. + + - Update the group log position to refer to the position just + after the event if the event is last in a group + + @param rli Pointer to relay log info structure + + @retval 0 Coordinates changed successfully + @retval errno Error code if advancing failed (usually just + 1). Observe that handler errors are returned by the + do_apply_event() function, and not by this one. + */ + virtual int do_update_pos(rpl_group_info *rgi); + + + /** + Decide if this event shall be skipped or not and the reason for + skipping it. + + The default implementation decide that the event shall be skipped + if either: + + - the server id of the event is the same as the server id of the + server and rli->replicate_same_server_id is true, + or + + - if rli->slave_skip_counter is greater than zero. + + @see do_apply_event + @see do_update_pos + + @retval Log_event::EVENT_SKIP_NOT + The event shall not be skipped and should be applied. + + @retval Log_event::EVENT_SKIP_IGNORE + The event shall be skipped by just ignoring it, i.e., the slave + skip counter shall not be changed. This happends if, for example, + the originating server id of the event is the same as the server + id of the slave. + + @retval Log_event::EVENT_SKIP_COUNT + The event shall be skipped because the slave skip counter was + non-zero. The caller shall decrease the counter by one. + */ + virtual enum_skip_reason do_shall_skip(rpl_group_info *rgi); +#endif +}; + + +/* + One class for each type of event. + Two constructors for each class: + - one to create the event for logging (when the server acts as a master), + called after an update to the database is done, + which accepts parameters like the query, the database, the options for LOAD + DATA INFILE... + - one to create the event from a packet (when the server acts as a slave), + called before reproducing the update, which accepts parameters (like a + buffer). Used to read from the master, from the relay log, and in + mysqlbinlog. This constructor must be format-tolerant. +*/ + +/** + @class Query_log_event + + A @c Query_log_event is created for each query that modifies the + database, unless the query is logged row-based. + + @section Query_log_event_binary_format Binary format + + See @ref Log_event_binary_format "Binary format for log events" for + a general discussion and introduction to the binary format of binlog + events. + + The Post-Header has five components: + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + +
Post-Header for Query_log_event
NameFormatDescription
slave_proxy_id4 byte unsigned integerAn integer identifying the client thread that issued the + query. The id is unique per server. (Note, however, that two + threads on different servers may have the same slave_proxy_id.) + This is used when a client thread creates a temporary table local + to the client. The slave_proxy_id is used to distinguish + temporary tables that belong to different clients. +
exec_time4 byte unsigned integerThe time from when the query started to when it was logged in + the binlog, in seconds.
db_len1 byte integerThe length of the name of the currently selected database.
error_code2 byte unsigned integerError code generated by the master. If the master fails, the + slave will fail with the same error code, except for the error + codes ER_DB_CREATE_EXISTS == 1007 and ER_DB_DROP_EXISTS == 1008. +
status_vars_len2 byte unsigned integerThe length of the status_vars block of the Body, in bytes. See + @ref query_log_event_status_vars "below". +
+ + The Body has the following components: + + + + + + + + + + + + + + + + + + + + + + + + + + + +
Body for Query_log_event
NameFormatDescription
@anchor query_log_event_status_vars status_varsstatus_vars_len bytesZero or more status variables. Each status variable consists + of one byte identifying the variable stored, followed by the value + of the variable. The possible variables are listed separately in + the table @ref Table_query_log_event_status_vars "below". MySQL + always writes events in the order defined below; however, it is + capable of reading them in any order.
dbdb_len+1The currently selected database, as a null-terminated string. + + (The trailing zero is redundant since the length is already known; + it is db_len from Post-Header.) +
queryvariable length string without trailing zero, extending to the + end of the event (determined by the length field of the + Common-Header) + The SQL query.
+ + The following table lists the status variables that may appear in + the status_vars field. + + @anchor Table_query_log_event_status_vars + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + +
Status variables for Query_log_event
Status variable1 byte identifierFormatDescription
flags2Q_FLAGS2_CODE == 04 byte bitfieldThe flags in @c thd->options, binary AND-ed with @c + OPTIONS_WRITTEN_TO_BIN_LOG. The @c thd->options bitfield contains + options for "SELECT". @c OPTIONS_WRITTEN identifies those options + that need to be written to the binlog (not all do). Specifically, + @c OPTIONS_WRITTEN_TO_BIN_LOG equals (@c OPTION_AUTO_IS_NULL | @c + OPTION_NO_FOREIGN_KEY_CHECKS | @c OPTION_RELAXED_UNIQUE_CHECKS | + @c OPTION_NOT_AUTOCOMMIT), or 0x0c084000 in hex. + + These flags correspond to the SQL variables SQL_AUTO_IS_NULL, + FOREIGN_KEY_CHECKS, UNIQUE_CHECKS, and AUTOCOMMIT, documented in + the "SET Syntax" section of the MySQL Manual. + + This field is always written to the binlog in version >= 5.0, and + never written in version < 5.0. +
sql_modeQ_SQL_MODE_CODE == 18 byte bitfieldThe @c sql_mode variable. See the section "SQL Modes" in the + MySQL manual, and see sql_priv.h for a list of the possible + flags. Currently (2007-10-04), the following flags are available: + 
+    MODE_REAL_AS_FLOAT==0x1
+    MODE_PIPES_AS_CONCAT==0x2
+    MODE_ANSI_QUOTES==0x4
+    MODE_IGNORE_SPACE==0x8
+    MODE_IGNORE_BAD_TABLE_OPTIONS==0x10
+    MODE_ONLY_FULL_GROUP_BY==0x20
+    MODE_NO_UNSIGNED_SUBTRACTION==0x40
+    MODE_NO_DIR_IN_CREATE==0x80
+    MODE_POSTGRESQL==0x100
+    MODE_ORACLE==0x200
+    MODE_MSSQL==0x400
+    MODE_DB2==0x800
+    MODE_MAXDB==0x1000
+    MODE_NO_KEY_OPTIONS==0x2000
+    MODE_NO_TABLE_OPTIONS==0x4000
+    MODE_NO_FIELD_OPTIONS==0x8000
+    MODE_MYSQL323==0x10000
+    MODE_MYSQL323==0x20000
+    MODE_MYSQL40==0x40000
+    MODE_ANSI==0x80000
+    MODE_NO_AUTO_VALUE_ON_ZERO==0x100000
+    MODE_NO_BACKSLASH_ESCAPES==0x200000
+    MODE_STRICT_TRANS_TABLES==0x400000
+    MODE_STRICT_ALL_TABLES==0x800000
+    MODE_NO_ZERO_IN_DATE==0x1000000
+    MODE_NO_ZERO_DATE==0x2000000
+    MODE_INVALID_DATES==0x4000000
+    MODE_ERROR_FOR_DIVISION_BY_ZERO==0x8000000
+    MODE_TRADITIONAL==0x10000000
+    MODE_NO_AUTO_CREATE_USER==0x20000000
+    MODE_HIGH_NOT_PRECEDENCE==0x40000000
+    MODE_PAD_CHAR_TO_FULL_LENGTH==0x80000000
+
+ All these flags are replicated from the server. However, all + flags except @c MODE_NO_DIR_IN_CREATE are honored by the slave; + the slave always preserves its old value of @c + MODE_NO_DIR_IN_CREATE. For a rationale, see comment in + @c Query_log_event::do_apply_event in @c log_event.cc. + + This field is always written to the binlog. +
catalogQ_CATALOG_NZ_CODE == 6Variable-length string: the length in bytes (1 byte) followed + by the characters (at most 255 bytes) + Stores the client's current catalog. Every database belongs + to a catalog, the same way that every table belongs to a + database. Currently, there is only one catalog, "std". + + This field is written if the length of the catalog is > 0; + otherwise it is not written. +
auto_incrementQ_AUTO_INCREMENT == 3two 2 byte unsigned integers, totally 2+2=4 bytesThe two variables auto_increment_increment and + auto_increment_offset, in that order. For more information, see + "System variables" in the MySQL manual. + + This field is written if auto_increment > 1. Otherwise, it is not + written. +
charsetQ_CHARSET_CODE == 4three 2 byte unsigned integers, totally 2+2+2=6 bytesThe three variables character_set_client, + collation_connection, and collation_server, in that order. + character_set_client is a code identifying the character set and + collation used by the client to encode the query. + collation_connection identifies the character set and collation + that the master converts the query to when it receives it; this is + useful when comparing literal strings. collation_server is the + default character set and collation used when a new database is + created. + + See also "Connection Character Sets and Collations" in the MySQL + 5.1 manual. + + All three variables are codes identifying a (character set, + collation) pair. To see which codes map to which pairs, run the + query "SELECT id, character_set_name, collation_name FROM + COLLATIONS". + + Cf. Q_CHARSET_DATABASE_CODE below. + + This field is always written. +
time_zoneQ_TIME_ZONE_CODE == 5Variable-length string: the length in bytes (1 byte) followed + by the characters (at most 255 bytes). + The time_zone of the master. + + See also "System Variables" and "MySQL Server Time Zone Support" + in the MySQL manual. + + This field is written if the length of the time zone string is > + 0; otherwise, it is not written. +
lc_time_names_numberQ_LC_TIME_NAMES_CODE == 72 byte integerA code identifying a table of month and day names. The + mapping from codes to languages is defined in @c sql_locale.cc. + + This field is written if it is not 0, i.e., if the locale is not + en_US. +
charset_database_numberQ_CHARSET_DATABASE_CODE == 82 byte integerThe value of the collation_database system variable (in the + source code stored in @c thd->variables.collation_database), which + holds the code for a (character set, collation) pair as described + above (see Q_CHARSET_CODE). + + collation_database was used in old versions (???WHEN). Its value + was loaded when issuing a "use db" query and could be changed by + issuing a "SET collation_database=xxx" query. It used to affect + the "LOAD DATA INFILE" and "CREATE TABLE" commands. + + In newer versions, "CREATE TABLE" has been changed to take the + character set from the database of the created table, rather than + the character set of the current database. This makes a + difference when creating a table in another database than the + current one. "LOAD DATA INFILE" has not yet changed to do this, + but there are plans to eventually do it, and to make + collation_database read-only. + + This field is written if it is not 0. +
table_map_for_updateQ_TABLE_MAP_FOR_UPDATE_CODE == 98 byte integerThe value of the table map that is to be updated by the + multi-table update query statement. Every bit of this variable + represents a table, and is set to 1 if the corresponding table is + to be updated by this statement. + + The value of this variable is set when executing a multi-table update + statement and used by slave to apply filter rules without opening + all the tables on slave. This is required because some tables may + not exist on slave because of the filter rules. +
+ + @subsection Query_log_event_notes_on_previous_versions Notes on Previous Versions + + * Status vars were introduced in version 5.0. To read earlier + versions correctly, check the length of the Post-Header. + + * The status variable Q_CATALOG_CODE == 2 existed in MySQL 5.0.x, + where 0<=x<=3. It was identical to Q_CATALOG_CODE, except that the + string had a trailing '\0'. The '\0' was removed in 5.0.4 since it + was redundant (the string length is stored before the string). The + Q_CATALOG_CODE will never be written by a new master, but can still + be understood by a new slave. + + * See Q_CHARSET_DATABASE_CODE in the table above. + + * When adding new status vars, please don't forget to update the + MAX_SIZE_LOG_EVENT_STATUS, and update function code_name + +*/ +class Query_log_event: public Log_event +{ + LEX_CSTRING user; + LEX_CSTRING host; +protected: + Log_event::Byte* data_buf; +public: + const char* query; + const char* catalog; + const char* db; + /* + If we already know the length of the query string + we pass it with q_len, so we would not have to call strlen() + otherwise, set it to 0, in which case, we compute it with strlen() + */ + uint32 q_len; + uint32 db_len; + uint16 error_code; + my_thread_id thread_id; + /* + For events created by Query_log_event::do_apply_event (and + Load_log_event::do_apply_event()) we need the *original* thread + id, to be able to log the event with the original (=master's) + thread id (fix for BUG#1686). + */ + ulong slave_proxy_id; + + /* + Binlog format 3 and 4 start to differ (as far as class members are + concerned) from here. + */ + + uint catalog_len; // <= 255 char; 0 means uninited + + /* + We want to be able to store a variable number of N-bit status vars: + (generally N=32; but N=64 for SQL_MODE) a user may want to log the number + of affected rows (for debugging) while another does not want to lose 4 + bytes in this. + The storage on disk is the following: + status_vars_len is part of the post-header, + status_vars are in the variable-length part, after the post-header, before + the db & query. + status_vars on disk is a sequence of pairs (code, value) where 'code' means + 'sql_mode', 'affected' etc. Sometimes 'value' must be a short string, so + its first byte is its length. For now the order of status vars is: + flags2 - sql_mode - catalog - autoinc - charset + We should add the same thing to Load_log_event, but in fact + LOAD DATA INFILE is going to be logged with a new type of event (logging of + the plain text query), so Load_log_event would be frozen, so no need. The + new way of logging LOAD DATA INFILE would use a derived class of + Query_log_event, so automatically benefit from the work already done for + status variables in Query_log_event. + */ + uint16 status_vars_len; + + /* + 'flags2' is a second set of flags (on top of those in Log_event), for + session variables. These are thd->options which is & against a mask + (OPTIONS_WRITTEN_TO_BIN_LOG). + flags2_inited helps make a difference between flags2==0 (3.23 or 4.x + master, we don't know flags2, so use the slave server's global options) and + flags2==0 (5.0 master, we know this has a meaning of flags all down which + must influence the query). + */ + bool flags2_inited; + bool sql_mode_inited; + bool charset_inited; + + uint32 flags2; + sql_mode_t sql_mode; + ulong auto_increment_increment, auto_increment_offset; + char charset[6]; + uint time_zone_len; /* 0 means uninited */ + const char *time_zone_str; + uint lc_time_names_number; /* 0 means en_US */ + uint charset_database_number; + /* + map for tables that will be updated for a multi-table update query + statement, for other query statements, this will be zero. + */ + ulonglong table_map_for_update; + /* + Holds the original length of a Query_log_event that comes from a + master of version < 5.0 (i.e., binlog_version < 4). When the IO + thread writes the relay log, it augments the Query_log_event with a + Q_MASTER_DATA_WRITTEN_CODE status_var that holds the original event + length. This field is initialized to non-zero in the SQL thread when + it reads this augmented event. SQL thread does not write + Q_MASTER_DATA_WRITTEN_CODE to the slave's server binlog. + */ + uint32 master_data_written; + +#ifdef MYSQL_SERVER + + Query_log_event(THD* thd_arg, const char* query_arg, size_t query_length, + bool using_trans, bool direct, bool suppress_use, int error); + const char* get_db() { return db; } +#ifdef HAVE_REPLICATION + void pack_info(Protocol* protocol); +#endif /* HAVE_REPLICATION */ +#else + bool print_query_header(IO_CACHE* file, PRINT_EVENT_INFO* print_event_info); + bool print(FILE* file, PRINT_EVENT_INFO* print_event_info); +#endif + + Query_log_event(); + Query_log_event(const char* buf, uint event_len, + const Format_description_log_event *description_event, + Log_event_type event_type); + ~Query_log_event() + { + if (data_buf) + my_free(data_buf); + } + Log_event_type get_type_code() { return QUERY_EVENT; } + static int dummy_event(String *packet, ulong ev_offset, enum enum_binlog_checksum_alg checksum_alg); + static int begin_event(String *packet, ulong ev_offset, enum enum_binlog_checksum_alg checksum_alg); +#ifdef MYSQL_SERVER + bool write(); + virtual bool write_post_header_for_derived() { return FALSE; } +#endif + bool is_valid() const { return query != 0; } + + /* + Returns number of bytes additionally written to post header by derived + events (so far it is only Execute_load_query event). + */ + virtual ulong get_post_header_size_for_derived() { return 0; } + /* Writes derived event-specific part of post header. */ + +public: /* !!! Public in this patch to allow old usage */ +#if defined(MYSQL_SERVER) && defined(HAVE_REPLICATION) + virtual enum_skip_reason do_shall_skip(rpl_group_info *rgi); + virtual int do_apply_event(rpl_group_info *rgi); + + int do_apply_event(rpl_group_info *rgi, + const char *query_arg, + uint32 q_len_arg); + static bool peek_is_commit_rollback(const char *event_start, + size_t event_len, enum enum_binlog_checksum_alg checksum_alg); +#endif /* HAVE_REPLICATION */ + /* + If true, the event always be applied by slave SQL thread or be printed by + mysqlbinlog + */ + bool is_trans_keyword() + { + /* + Before the patch for bug#50407, The 'SAVEPOINT and ROLLBACK TO' + queries input by user was written into log events directly. + So the keywords can be written in both upper case and lower case + together, strncasecmp is used to check both cases. they also could be + binlogged with comments in the front of these keywords. for examples: + / * bla bla * / SAVEPOINT a; + / * bla bla * / ROLLBACK TO a; + but we don't handle these cases and after the patch, both quiries are + binlogged in upper case with no comments. + */ + return !strncmp(query, "BEGIN", q_len) || + !strncmp(query, "COMMIT", q_len) || + !strncasecmp(query, "SAVEPOINT", 9) || + !strncasecmp(query, "ROLLBACK", 8); + } + virtual bool is_begin() { return !strcmp(query, "BEGIN"); } + virtual bool is_commit() { return !strcmp(query, "COMMIT"); } + virtual bool is_rollback() { return !strcmp(query, "ROLLBACK"); } +}; + +class Query_compressed_log_event:public Query_log_event{ +protected: + Log_event::Byte* query_buf; // point to the uncompressed query +public: + Query_compressed_log_event(const char* buf, uint event_len, + const Format_description_log_event *description_event, + Log_event_type event_type); + ~Query_compressed_log_event() + { + if (query_buf) + my_free(query_buf); + } + Log_event_type get_type_code() { return QUERY_COMPRESSED_EVENT; } + + /* + the min length of log_bin_compress_min_len is 10, + means that Begin/Commit/Rollback would never be compressed! + */ + virtual bool is_begin() { return false; } + virtual bool is_commit() { return false; } + virtual bool is_rollback() { return false; } +#ifdef MYSQL_SERVER + Query_compressed_log_event(THD* thd_arg, const char* query_arg, + ulong query_length, + bool using_trans, bool direct, bool suppress_use, + int error); + virtual bool write(); +#endif +}; + + +/***************************************************************************** + sql_ex_info struct + ****************************************************************************/ +struct sql_ex_info +{ + const char* field_term; + const char* enclosed; + const char* line_term; + const char* line_start; + const char* escaped; + int cached_new_format= -1; + uint8 field_term_len= 0, enclosed_len= 0, line_term_len= 0, + line_start_len= 0, escaped_len= 0; + char opt_flags; + char empty_flags= 0; + + // store in new format even if old is possible + void force_new_format() { cached_new_format = 1;} + int data_size() + { + return (new_format() ? + field_term_len + enclosed_len + line_term_len + + line_start_len + escaped_len + 6 : 7); + } + bool write_data(Log_event_writer *writer); + const char* init(const char* buf, const char* buf_end, bool use_new_format); + bool new_format() + { + return ((cached_new_format != -1) ? cached_new_format : + (cached_new_format=(field_term_len > 1 || + enclosed_len > 1 || + line_term_len > 1 || line_start_len > 1 || + escaped_len > 1))); + } +}; + +/** + @class Load_log_event + + This log event corresponds to a "LOAD DATA INFILE" SQL query on the + following form: + + @verbatim + (1) USE db; + (2) LOAD DATA [CONCURRENT] [LOCAL] INFILE 'file_name' + (3) [REPLACE | IGNORE] + (4) INTO TABLE 'table_name' + (5) [FIELDS + (6) [TERMINATED BY 'field_term'] + (7) [[OPTIONALLY] ENCLOSED BY 'enclosed'] + (8) [ESCAPED BY 'escaped'] + (9) ] + (10) [LINES + (11) [TERMINATED BY 'line_term'] + (12) [LINES STARTING BY 'line_start'] + (13) ] + (14) [IGNORE skip_lines LINES] + (15) (field_1, field_2, ..., field_n)@endverbatim + + @section Load_log_event_binary_format Binary Format + + The Post-Header consists of the following six components. + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + +
Post-Header for Load_log_event
NameFormatDescription
slave_proxy_id4 byte unsigned integerAn integer identifying the client thread that issued the + query. The id is unique per server. (Note, however, that two + threads on different servers may have the same slave_proxy_id.) + This is used when a client thread creates a temporary table local + to the client. The slave_proxy_id is used to distinguish + temporary tables that belong to different clients. +
exec_time4 byte unsigned integerThe time from when the query started to when it was logged in + the binlog, in seconds.
skip_lines4 byte unsigned integerThe number on line (14) above, if present, or 0 if line (14) + is left out. +
table_name_len1 byte unsigned integerThe length of 'table_name' on line (4) above.
db_len1 byte unsigned integerThe length of 'db' on line (1) above.
num_fields4 byte unsigned integerThe number n of fields on line (15) above.
+ + The Body contains the following components. + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + +
Body of Load_log_event
NameFormatDescription
sql_exvariable lengthDescribes the part of the query on lines (3) and + (5)–(13) above. More precisely, it stores the five strings + (on lines) field_term (6), enclosed (7), escaped (8), line_term + (11), and line_start (12); as well as a bitfield indicating the + presence of the keywords REPLACE (3), IGNORE (3), and OPTIONALLY + (7). + + The data is stored in one of two formats, called "old" and "new". + The type field of Common-Header determines which of these two + formats is used: type LOAD_EVENT means that the old format is + used, and type NEW_LOAD_EVENT means that the new format is used. + When MySQL writes a Load_log_event, it uses the new format if at + least one of the five strings is two or more bytes long. + Otherwise (i.e., if all strings are 0 or 1 bytes long), the old + format is used. + + The new and old format differ in the way the five strings are + stored. + +
    +
  • In the new format, the strings are stored in the order + field_term, enclosed, escaped, line_term, line_start. Each string + consists of a length (1 byte), followed by a sequence of + characters (0-255 bytes). Finally, a boolean combination of the + following flags is stored in 1 byte: REPLACE_FLAG==0x4, + IGNORE_FLAG==0x8, and OPT_ENCLOSED_FLAG==0x2. If a flag is set, + it indicates the presence of the corresponding keyword in the SQL + query. + +
  • In the old format, we know that each string has length 0 or + 1. Therefore, only the first byte of each string is stored. The + order of the strings is the same as in the new format. These five + bytes are followed by the same 1 byte bitfield as in the new + format. Finally, a 1 byte bitfield called empty_flags is stored. + The low 5 bits of empty_flags indicate which of the five strings + have length 0. For each of the following flags that is set, the + corresponding string has length 0; for the flags that are not set, + the string has length 1: FIELD_TERM_EMPTY==0x1, + ENCLOSED_EMPTY==0x2, LINE_TERM_EMPTY==0x4, LINE_START_EMPTY==0x8, + ESCAPED_EMPTY==0x10. +
+ + Thus, the size of the new format is 6 bytes + the sum of the sizes + of the five strings. The size of the old format is always 7 + bytes. +
field_lensnum_fields 1 byte unsigned integersAn array of num_fields integers representing the length of + each field in the query. (num_fields is from the Post-Header). +
fieldsnum_fields null-terminated stringsAn array of num_fields null-terminated strings, each + representing a field in the query. (The trailing zero is + redundant, since the length are stored in the num_fields array.) + The total length of all strings equals to the sum of all + field_lens, plus num_fields bytes for all the trailing zeros. +
table_namenull-terminated string of length table_len+1 bytesThe 'table_name' from the query, as a null-terminated string. + (The trailing zero is actually redundant since the table_len is + known from Post-Header.) +
dbnull-terminated string of length db_len+1 bytesThe 'db' from the query, as a null-terminated string. + (The trailing zero is actually redundant since the db_len is known + from Post-Header.) +
file_namevariable length string without trailing zero, extending to the + end of the event (determined by the length field of the + Common-Header) + The 'file_name' from the query. +
+ + @subsection Load_log_event_notes_on_previous_versions Notes on Previous Versions + + This event type is understood by current versions, but only + generated by MySQL 3.23 and earlier. +*/ +class Load_log_event: public Log_event +{ +private: +protected: + int copy_log_event(const char *buf, ulong event_len, + int body_offset, + const Format_description_log_event* description_event); + +public: + bool print_query(THD *thd, bool need_db, const char *cs, String *buf, + my_off_t *fn_start, my_off_t *fn_end, + const char *qualify_db); + my_thread_id thread_id; + ulong slave_proxy_id; + uint32 table_name_len; + /* + No need to have a catalog, as these events can only come from 4.x. + TODO: this may become false if Dmitri pushes his new LOAD DATA INFILE in + 5.0 only (not in 4.x). + */ + uint32 db_len; + uint32 fname_len; + uint32 num_fields; + const char* fields; + const uchar* field_lens; + uint32 field_block_len; + + const char* table_name; + const char* db; + const char* fname; + uint32 skip_lines; + sql_ex_info sql_ex; + bool local_fname; + /** + Indicates that this event corresponds to LOAD DATA CONCURRENT, + + @note Since Load_log_event event coming from the binary log + lacks information whether LOAD DATA on master was concurrent + or not, this flag is only set to TRUE for an auxiliary + Load_log_event object which is used in mysql_load() to + re-construct LOAD DATA statement from function parameters, + for logging. + */ + bool is_concurrent; + + /* fname doesn't point to memory inside Log_event::temp_buf */ + void set_fname_outside_temp_buf(const char *afname, size_t alen) + { + fname= afname; + fname_len= (uint)alen; + local_fname= TRUE; + } + /* fname doesn't point to memory inside Log_event::temp_buf */ + int check_fname_outside_temp_buf() + { + return local_fname; + } + +#ifdef MYSQL_SERVER + String field_lens_buf; + String fields_buf; + + Load_log_event(THD* thd, const sql_exchange* ex, const char* db_arg, + const char* table_name_arg, + List& fields_arg, + bool is_concurrent_arg, + enum enum_duplicates handle_dup, bool ignore, + bool using_trans); + void set_fields(const char* db, List &fields_arg, + Name_resolution_context *context); + const char* get_db() { return db; } +#ifdef HAVE_REPLICATION + void pack_info(Protocol* protocol); +#endif /* HAVE_REPLICATION */ +#else + bool print(FILE* file, PRINT_EVENT_INFO* print_event_info); + bool print(FILE* file, PRINT_EVENT_INFO* print_event_info, bool commented); +#endif + + /* + Note that for all the events related to LOAD DATA (Load_log_event, + Create_file/Append/Exec/Delete, we pass description_event; however as + logging of LOAD DATA is going to be changed in 4.1 or 5.0, this is only used + for the common_header_len (post_header_len will not be changed). + */ + Load_log_event(const char* buf, uint event_len, + const Format_description_log_event* description_event); + ~Load_log_event() + {} + Log_event_type get_type_code() + { + return sql_ex.new_format() ? NEW_LOAD_EVENT: LOAD_EVENT; + } +#ifdef MYSQL_SERVER + bool write_data_header(); + bool write_data_body(); +#endif + bool is_valid() const { return table_name != 0; } + int get_data_size() + { + return (table_name_len + db_len + 2 + fname_len + + LOAD_HEADER_LEN + + sql_ex.data_size() + field_block_len + num_fields); + } + +public: /* !!! Public in this patch to allow old usage */ +#if defined(MYSQL_SERVER) && defined(HAVE_REPLICATION) + virtual int do_apply_event(rpl_group_info *rgi) + { + return do_apply_event(thd->slave_net,rgi,0); + } + + int do_apply_event(NET *net, rpl_group_info *rgi, + bool use_rli_only_for_errors); +#endif +}; + +/** + @class Start_log_event_v3 + + Start_log_event_v3 is the Start_log_event of binlog format 3 (MySQL 3.23 and + 4.x). + + Format_description_log_event derives from Start_log_event_v3; it is + the Start_log_event of binlog format 4 (MySQL 5.0), that is, the + event that describes the other events' Common-Header/Post-Header + lengths. This event is sent by MySQL 5.0 whenever it starts sending + a new binlog if the requested position is >4 (otherwise if ==4 the + event will be sent naturally). + + @section Start_log_event_v3_binary_format Binary Format +*/ +class Start_log_event_v3: public Log_event +{ +public: + /* + If this event is at the start of the first binary log since server + startup 'created' should be the timestamp when the event (and the + binary log) was created. In the other case (i.e. this event is at + the start of a binary log created by FLUSH LOGS or automatic + rotation), 'created' should be 0. This "trick" is used by MySQL + >=4.0.14 slaves to know whether they must drop stale temporary + tables and whether they should abort unfinished transaction. + + Note that when 'created'!=0, it is always equal to the event's + timestamp; indeed Start_log_event is written only in log.cc where + the first constructor below is called, in which 'created' is set + to 'when'. So in fact 'created' is a useless variable. When it is + 0 we can read the actual value from timestamp ('when') and when it + is non-zero we can read the same value from timestamp + ('when'). Conclusion: + - we use timestamp to print when the binlog was created. + - we use 'created' only to know if this is a first binlog or not. + In 3.23.57 we did not pay attention to this identity, so mysqlbinlog in + 3.23.57 does not print 'created the_date' if created was zero. This is now + fixed. + */ + time_t created; + uint16 binlog_version; + char server_version[ST_SERVER_VER_LEN]; + /* + We set this to 1 if we don't want to have the created time in the log, + which is the case when we rollover to a new log. + */ + bool dont_set_created; + +#ifdef MYSQL_SERVER + Start_log_event_v3(); +#ifdef HAVE_REPLICATION + void pack_info(Protocol* protocol); +#endif /* HAVE_REPLICATION */ +#else + Start_log_event_v3() {} + bool print(FILE* file, PRINT_EVENT_INFO* print_event_info); +#endif + + Start_log_event_v3(const char* buf, uint event_len, + const Format_description_log_event* description_event); + ~Start_log_event_v3() {} + Log_event_type get_type_code() { return START_EVENT_V3;} + my_off_t get_header_len(my_off_t l __attribute__((unused))) + { return LOG_EVENT_MINIMAL_HEADER_LEN; } +#ifdef MYSQL_SERVER + bool write(); +#endif + bool is_valid() const { return server_version[0] != 0; } + int get_data_size() + { + return START_V3_HEADER_LEN; //no variable-sized part + } + +protected: +#if defined(MYSQL_SERVER) && defined(HAVE_REPLICATION) + virtual int do_apply_event(rpl_group_info *rgi); + virtual enum_skip_reason do_shall_skip(rpl_group_info*) + { + /* + Events from ourself should be skipped, but they should not + decrease the slave skip counter. + */ + if (this->server_id == global_system_variables.server_id) + return Log_event::EVENT_SKIP_IGNORE; + else + return Log_event::EVENT_SKIP_NOT; + } +#endif +}; + +/** + @class Start_encryption_log_event + + Start_encryption_log_event marks the beginning of encrypted data (all events + after this event are encrypted). + + It contains the cryptographic scheme used for the encryption as well as any + data required to decrypt (except the actual key). + + For binlog cryptoscheme 1: key version, and nonce for iv generation. +*/ +class Start_encryption_log_event : public Log_event +{ +public: +#ifdef MYSQL_SERVER + Start_encryption_log_event(uint crypto_scheme_arg, uint key_version_arg, + const uchar* nonce_arg) + : crypto_scheme(crypto_scheme_arg), key_version(key_version_arg) + { + cache_type = EVENT_NO_CACHE; + DBUG_ASSERT(crypto_scheme == 1); + memcpy(nonce, nonce_arg, BINLOG_NONCE_LENGTH); + } + + bool write_data_body() + { + uchar scheme_buf= crypto_scheme; + uchar key_version_buf[BINLOG_KEY_VERSION_LENGTH]; + int4store(key_version_buf, key_version); + return write_data(&scheme_buf, sizeof(scheme_buf)) || + write_data(key_version_buf, sizeof(key_version_buf)) || + write_data(nonce, BINLOG_NONCE_LENGTH); + } +#else + bool print(FILE* file, PRINT_EVENT_INFO* print_event_info); +#endif + + Start_encryption_log_event( + const char* buf, uint event_len, + const Format_description_log_event* description_event); + + bool is_valid() const { return crypto_scheme == 1; } + + Log_event_type get_type_code() { return START_ENCRYPTION_EVENT; } + + int get_data_size() + { + return BINLOG_CRYPTO_SCHEME_LENGTH + BINLOG_KEY_VERSION_LENGTH + + BINLOG_NONCE_LENGTH; + } + + uint crypto_scheme; + uint key_version; + uchar nonce[BINLOG_NONCE_LENGTH]; + +protected: +#if defined(MYSQL_SERVER) && defined(HAVE_REPLICATION) + virtual int do_apply_event(rpl_group_info* rgi); + virtual int do_update_pos(rpl_group_info *rgi); + virtual enum_skip_reason do_shall_skip(rpl_group_info* rgi) + { + return Log_event::EVENT_SKIP_NOT; + } +#endif + +}; + + +class Version +{ +protected: + uchar m_ver[3]; + int cmp(const Version &other) const + { + return memcmp(m_ver, other.m_ver, 3); + } +public: + Version() + { + m_ver[0]= m_ver[1]= m_ver[2]= '\0'; + } + Version(uchar v0, uchar v1, uchar v2) + { + m_ver[0]= v0; + m_ver[1]= v1; + m_ver[2]= v2; + } + Version(const char *version, const char **endptr); + const uchar& operator [] (size_t i) const + { + DBUG_ASSERT(i < 3); + return m_ver[i]; + } + bool operator<(const Version &other) const { return cmp(other) < 0; } + bool operator>(const Version &other) const { return cmp(other) > 0; } + bool operator<=(const Version &other) const { return cmp(other) <= 0; } + bool operator>=(const Version &other) const { return cmp(other) >= 0; } +}; + + +/** + @class Format_description_log_event + + For binlog version 4. + This event is saved by threads which read it, as they need it for future + use (to decode the ordinary events). + + @section Format_description_log_event_binary_format Binary Format +*/ + +class Format_description_log_event: public Start_log_event_v3 +{ +public: + /* + The size of the fixed header which _all_ events have + (for binlogs written by this version, this is equal to + LOG_EVENT_HEADER_LEN), except FORMAT_DESCRIPTION_EVENT and ROTATE_EVENT + (those have a header of size LOG_EVENT_MINIMAL_HEADER_LEN). + */ + uint8 common_header_len; + uint8 number_of_event_types; + /* + The list of post-headers' lengths followed + by the checksum alg description byte + */ + uint8 *post_header_len; + class master_version_split: public Version { + public: + enum {KIND_MYSQL, KIND_MARIADB}; + int kind; + master_version_split() :kind(KIND_MARIADB) { } + master_version_split(const char *version); + bool version_is_valid() const + { + /* It is invalid only when all version numbers are 0 */ + return !(m_ver[0] == 0 && m_ver[1] == 0 && m_ver[2] == 0); + } + }; + master_version_split server_version_split; + const uint8 *event_type_permutation; + + Format_description_log_event(uint8 binlog_ver, const char* server_ver=0); + Format_description_log_event(const char* buf, uint event_len, + const Format_description_log_event + *description_event); + ~Format_description_log_event() + { + my_free(post_header_len); + } + Log_event_type get_type_code() { return FORMAT_DESCRIPTION_EVENT;} +#ifdef MYSQL_SERVER + bool write(); +#endif + bool header_is_valid() const + { + return ((common_header_len >= ((binlog_version==1) ? OLD_HEADER_LEN : + LOG_EVENT_MINIMAL_HEADER_LEN)) && + (post_header_len != NULL)); + } + + bool is_valid() const + { + return header_is_valid() && server_version_split.version_is_valid(); + } + + int get_data_size() + { + /* + The vector of post-header lengths is considered as part of the + post-header, because in a given version it never changes (contrary to the + query in a Query_log_event). + */ + return FORMAT_DESCRIPTION_HEADER_LEN; + } + + Binlog_crypt_data crypto_data; + bool start_decryption(Start_encryption_log_event* sele); + void copy_crypto_data(const Format_description_log_event* o) + { + crypto_data= o->crypto_data; + } + void reset_crypto() + { + crypto_data.scheme= 0; + } + + void calc_server_version_split(); + static bool is_version_before_checksum(const master_version_split *version_split); +protected: +#if defined(MYSQL_SERVER) && defined(HAVE_REPLICATION) + virtual int do_apply_event(rpl_group_info *rgi); + virtual int do_update_pos(rpl_group_info *rgi); + virtual enum_skip_reason do_shall_skip(rpl_group_info *rgi); +#endif +}; + + +/** + @class Intvar_log_event + + An Intvar_log_event will be created just before a Query_log_event, + if the query uses one of the variables LAST_INSERT_ID or INSERT_ID. + Each Intvar_log_event holds the value of one of these variables. + + @section Intvar_log_event_binary_format Binary Format + + The Post-Header for this event type is empty. The Body has two + components: + + + + + + + + + + + + + + + + + + + + + + +
Body for Intvar_log_event
NameFormatDescription
type1 byte enumerationOne byte identifying the type of variable stored. Currently, + two identifiers are supported: LAST_INSERT_ID_EVENT==1 and + INSERT_ID_EVENT==2. +
value8 byte unsigned integerThe value of the variable.
+*/ +class Intvar_log_event: public Log_event +{ +public: + ulonglong val; + uchar type; + +#ifdef MYSQL_SERVER +Intvar_log_event(THD* thd_arg,uchar type_arg, ulonglong val_arg, + bool using_trans, bool direct) + :Log_event(thd_arg,0,using_trans),val(val_arg),type(type_arg) + { + if (direct) + cache_type= Log_event::EVENT_NO_CACHE; + } +#ifdef HAVE_REPLICATION + void pack_info(Protocol* protocol); +#endif /* HAVE_REPLICATION */ +#else + bool print(FILE* file, PRINT_EVENT_INFO* print_event_info); +#endif + + Intvar_log_event(const char* buf, + const Format_description_log_event *description_event); + ~Intvar_log_event() {} + Log_event_type get_type_code() { return INTVAR_EVENT;} + const char* get_var_type_name(); + int get_data_size() { return 9; /* sizeof(type) + sizeof(val) */;} +#ifdef MYSQL_SERVER + bool write(); +#endif + bool is_valid() const { return 1; } + bool is_part_of_group() { return 1; } + +private: +#if defined(MYSQL_SERVER) && defined(HAVE_REPLICATION) + virtual int do_apply_event(rpl_group_info *rgi); + virtual int do_update_pos(rpl_group_info *rgi); + virtual enum_skip_reason do_shall_skip(rpl_group_info *rgi); +#endif +}; + + +/** + @class Rand_log_event + + Logs random seed used by the next RAND(), and by PASSWORD() in 4.1.0. + 4.1.1 does not need it (it's repeatable again) so this event needn't be + written in 4.1.1 for PASSWORD() (but the fact that it is written is just a + waste, it does not cause bugs). + + The state of the random number generation consists of 128 bits, + which are stored internally as two 64-bit numbers. + + @section Rand_log_event_binary_format Binary Format + + The Post-Header for this event type is empty. The Body has two + components: + + + + + + + + + + + + + + + + + + + + + +
Body for Rand_log_event
NameFormatDescription
seed18 byte unsigned integer64 bit random seed1.
seed28 byte unsigned integer64 bit random seed2.
+*/ + +class Rand_log_event: public Log_event +{ + public: + ulonglong seed1; + ulonglong seed2; + +#ifdef MYSQL_SERVER + Rand_log_event(THD* thd_arg, ulonglong seed1_arg, ulonglong seed2_arg, + bool using_trans, bool direct) + :Log_event(thd_arg,0,using_trans),seed1(seed1_arg),seed2(seed2_arg) + { + if (direct) + cache_type= Log_event::EVENT_NO_CACHE; + } +#ifdef HAVE_REPLICATION + void pack_info(Protocol* protocol); +#endif /* HAVE_REPLICATION */ +#else + bool print(FILE* file, PRINT_EVENT_INFO* print_event_info); +#endif + + Rand_log_event(const char* buf, + const Format_description_log_event *description_event); + ~Rand_log_event() {} + Log_event_type get_type_code() { return RAND_EVENT;} + int get_data_size() { return 16; /* sizeof(ulonglong) * 2*/ } +#ifdef MYSQL_SERVER + bool write(); +#endif + bool is_valid() const { return 1; } + bool is_part_of_group() { return 1; } + +private: +#if defined(MYSQL_SERVER) && defined(HAVE_REPLICATION) + virtual int do_apply_event(rpl_group_info *rgi); + virtual int do_update_pos(rpl_group_info *rgi); + virtual enum_skip_reason do_shall_skip(rpl_group_info *rgi); +#endif +}; + + +class Xid_apply_log_event: public Log_event +{ +public: +#ifdef MYSQL_SERVER + Xid_apply_log_event(THD* thd_arg): + Log_event(thd_arg, 0, TRUE) {} +#endif + Xid_apply_log_event(const char* buf, + const Format_description_log_event *description_event): + Log_event(buf, description_event) {} + + ~Xid_apply_log_event() {} + bool is_valid() const { return 1; } +private: +#if defined(MYSQL_SERVER) && defined(HAVE_REPLICATION) + virtual int do_commit()= 0; + virtual int do_apply_event(rpl_group_info *rgi); + int do_record_gtid(THD *thd, rpl_group_info *rgi, bool in_trans, + void **out_hton); + enum_skip_reason do_shall_skip(rpl_group_info *rgi); + virtual const char* get_query()= 0; +#endif +}; + + +/** + @class Xid_log_event + + Logs xid of the transaction-to-be-committed in the 2pc protocol. + Has no meaning in replication, slaves ignore it. + + @section Xid_log_event_binary_format Binary Format +*/ +#ifdef MYSQL_CLIENT +typedef ulonglong my_xid; // this line is the same as in handler.h +#endif + +class Xid_log_event: public Xid_apply_log_event +{ +public: + my_xid xid; + +#ifdef MYSQL_SERVER + Xid_log_event(THD* thd_arg, my_xid x, bool direct): + Xid_apply_log_event(thd_arg), xid(x) + { + if (direct) + cache_type= Log_event::EVENT_NO_CACHE; + } + const char* get_query() + { + return "COMMIT /* implicit, from Xid_log_event */"; + } +#ifdef HAVE_REPLICATION + void pack_info(Protocol* protocol); +#endif /* HAVE_REPLICATION */ +#else + bool print(FILE* file, PRINT_EVENT_INFO* print_event_info); +#endif + + Xid_log_event(const char* buf, + const Format_description_log_event *description_event); + ~Xid_log_event() {} + Log_event_type get_type_code() { return XID_EVENT;} + int get_data_size() { return sizeof(xid); } +#ifdef MYSQL_SERVER + bool write(); +#endif + +private: +#if defined(MYSQL_SERVER) && defined(HAVE_REPLICATION) + int do_commit(); +#endif +}; + + +/** + @class XA_prepare_log_event + + Similar to Xid_log_event except that + - it is specific to XA transaction + - it carries out the prepare logics rather than the final committing + when @c one_phase member is off. The latter option is only for + compatibility with the upstream. + + From the groupping perspective the event finalizes the current + "prepare" group that is started with Gtid_log_event similarly to the + regular replicated transaction. +*/ + +/** + Function serializes XID which is characterized by by four last arguments + of the function. + Serialized XID is presented in valid hex format and is returned to + the caller in a buffer pointed by the first argument. + The buffer size provived by the caller must be not less than + 8 + 2 * XIDDATASIZE + 4 * sizeof(XID::formatID) + 1, see + {MYSQL_,}XID definitions. + + @param buf pointer to a buffer allocated for storing serialized data + @param fmt formatID value + @param gln gtrid_length value + @param bln bqual_length value + @param dat data value + + @return the value of the buffer pointer +*/ + +inline char *serialize_xid(char *buf, long fmt, long gln, long bln, + const char *dat) +{ + int i; + char *c= buf; + /* + Build a string consisting of the hex format representation of XID + as passed through fmt,gln,bln,dat argument: + X'hex11hex12...hex1m',X'hex21hex22...hex2n',11 + and store it into buf. + */ + c[0]= 'X'; + c[1]= '\''; + c+= 2; + for (i= 0; i < gln; i++) + { + c[0]=_dig_vec_lower[((uchar*) dat)[i] >> 4]; + c[1]=_dig_vec_lower[((uchar*) dat)[i] & 0x0f]; + c+= 2; + } + c[0]= '\''; + c[1]= ','; + c[2]= 'X'; + c[3]= '\''; + c+= 4; + + for (; i < gln + bln; i++) + { + c[0]=_dig_vec_lower[((uchar*) dat)[i] >> 4]; + c[1]=_dig_vec_lower[((uchar*) dat)[i] & 0x0f]; + c+= 2; + } + c[0]= '\''; + sprintf(c+1, ",%lu", fmt); + + return buf; +} + +/* + The size of the string containing serialized Xid representation + is computed as a sum of + eight as the number of formatting symbols (X'',X'',) + plus 2 x XIDDATASIZE (2 due to hex format), + plus space for decimal digits of XID::formatID, + plus one for 0x0. +*/ +static const uint ser_buf_size= + 8 + 2 * MYSQL_XIDDATASIZE + 4 * sizeof(long) + 1; + +struct event_mysql_xid_t : MYSQL_XID +{ + char buf[ser_buf_size]; + char *serialize() + { + return serialize_xid(buf, formatID, gtrid_length, bqual_length, data); + } +}; + +#ifndef MYSQL_CLIENT +struct event_xid_t : XID +{ + char buf[ser_buf_size]; + + char *serialize(char *buf_arg) + { + return serialize_xid(buf_arg, formatID, gtrid_length, bqual_length, data); + } + char *serialize() + { + return serialize(buf); + } +}; +#endif + +class XA_prepare_log_event: public Xid_apply_log_event +{ +protected: + + /* Constant contributor to subheader in write() by members of XID struct. */ + static const int xid_subheader_no_data= 12; + event_mysql_xid_t m_xid; + void *xid; + bool one_phase; + +public: +#ifdef MYSQL_SERVER + XA_prepare_log_event(THD* thd_arg, XID *xid_arg, bool one_phase_arg): + Xid_apply_log_event(thd_arg), xid(xid_arg), one_phase(one_phase_arg) + { + cache_type= Log_event::EVENT_NO_CACHE; + } +#ifdef HAVE_REPLICATION + void pack_info(Protocol* protocol); +#endif /* HAVE_REPLICATION */ +#else + bool print(FILE* file, PRINT_EVENT_INFO* print_event_info); +#endif + XA_prepare_log_event(const char* buf, + const Format_description_log_event *description_event); + ~XA_prepare_log_event() {} + Log_event_type get_type_code() { return XA_PREPARE_LOG_EVENT; } + bool is_valid() const { return m_xid.formatID != -1; } + int get_data_size() + { + return xid_subheader_no_data + m_xid.gtrid_length + m_xid.bqual_length; + } + +#ifdef MYSQL_SERVER + bool write(); +#endif + +private: +#if defined(MYSQL_SERVER) && defined(HAVE_REPLICATION) + char query[sizeof("XA COMMIT ONE PHASE") + 1 + ser_buf_size]; + int do_commit(); + const char* get_query() + { + sprintf(query, + (one_phase ? "XA COMMIT %s ONE PHASE" : "XA PREPARE %s"), + m_xid.serialize()); + return query; + } +#endif +}; + + +/** + @class User_var_log_event + + Every time a query uses the value of a user variable, a User_var_log_event is + written before the Query_log_event, to set the user variable. + + @section User_var_log_event_binary_format Binary Format +*/ + +class User_var_log_event: public Log_event +{ +public: + enum { + UNDEF_F= 0, + UNSIGNED_F= 1 + }; + const char *name; + size_t name_len; + const char *val; + size_t val_len; + Item_result type; + uint charset_number; + bool is_null; + uchar flags; +#ifdef MYSQL_SERVER + bool deferred; + query_id_t query_id; + User_var_log_event(THD* thd_arg, const char *name_arg, size_t name_len_arg, + const char *val_arg, size_t val_len_arg, Item_result type_arg, + uint charset_number_arg, uchar flags_arg, + bool using_trans, bool direct) + :Log_event(thd_arg, 0, using_trans), + name(name_arg), name_len(name_len_arg), val(val_arg), + val_len(val_len_arg), type(type_arg), charset_number(charset_number_arg), + flags(flags_arg), deferred(false) + { + is_null= !val; + if (direct) + cache_type= Log_event::EVENT_NO_CACHE; + } + void pack_info(Protocol* protocol); +#else + bool print(FILE* file, PRINT_EVENT_INFO* print_event_info); +#endif + + User_var_log_event(const char* buf, uint event_len, + const Format_description_log_event *description_event); + ~User_var_log_event() {} + Log_event_type get_type_code() { return USER_VAR_EVENT;} +#ifdef MYSQL_SERVER + bool write(); + /* + Getter and setter for deferred User-event. + Returns true if the event is not applied directly + and which case the applier adjusts execution path. + */ + bool is_deferred() { return deferred; } + /* + In case of the deferred applying the variable instance is flagged + and the parsing time query id is stored to be used at applying time. + */ + void set_deferred(query_id_t qid) { deferred= true; query_id= qid; } +#endif + bool is_valid() const { return name != 0; } + bool is_part_of_group() { return 1; } + +private: +#if defined(MYSQL_SERVER) && defined(HAVE_REPLICATION) + virtual int do_apply_event(rpl_group_info *rgi); + virtual int do_update_pos(rpl_group_info *rgi); + virtual enum_skip_reason do_shall_skip(rpl_group_info *rgi); +#endif +}; + + +/** + @class Stop_log_event + + @section Stop_log_event_binary_format Binary Format + + The Post-Header and Body for this event type are empty; it only has + the Common-Header. +*/ +class Stop_log_event: public Log_event +{ +public: +#ifdef MYSQL_SERVER + Stop_log_event() :Log_event() + {} +#else + bool print(FILE* file, PRINT_EVENT_INFO* print_event_info); +#endif + + Stop_log_event(const char* buf, + const Format_description_log_event *description_event): + Log_event(buf, description_event) + {} + ~Stop_log_event() {} + Log_event_type get_type_code() { return STOP_EVENT;} + bool is_valid() const { return 1; } + +private: +#if defined(MYSQL_SERVER) && defined(HAVE_REPLICATION) + virtual int do_update_pos(rpl_group_info *rgi); + virtual enum_skip_reason do_shall_skip(rpl_group_info *rgi) + { + /* + Events from ourself should be skipped, but they should not + decrease the slave skip counter. + */ + if (this->server_id == global_system_variables.server_id) + return Log_event::EVENT_SKIP_IGNORE; + else + return Log_event::EVENT_SKIP_NOT; + } +#endif +}; + +/** + @class Rotate_log_event + + This will be deprecated when we move to using sequence ids. + + @section Rotate_log_event_binary_format Binary Format + + The Post-Header has one component: + + + + + + + + + + + + + + + + +
Post-Header for Rotate_log_event
NameFormatDescription
position8 byte integerThe position within the binlog to rotate to.
+ + The Body has one component: + + + + + + + + + + + + + + + + +
Body for Rotate_log_event
NameFormatDescription
new_logvariable length string without trailing zero, extending to the + end of the event (determined by the length field of the + Common-Header) + Name of the binlog to rotate to.
+*/ + +class Rotate_log_event: public Log_event +{ +public: + enum { + DUP_NAME= 2, // if constructor should dup the string argument + RELAY_LOG=4 // rotate event for relay log + }; + const char* new_log_ident; + ulonglong pos; + uint ident_len; + uint flags; +#ifdef MYSQL_SERVER + Rotate_log_event(const char* new_log_ident_arg, + uint ident_len_arg, + ulonglong pos_arg, uint flags); +#ifdef HAVE_REPLICATION + void pack_info(Protocol* protocol); +#endif /* HAVE_REPLICATION */ +#else + bool print(FILE* file, PRINT_EVENT_INFO* print_event_info); +#endif + + Rotate_log_event(const char* buf, uint event_len, + const Format_description_log_event* description_event); + ~Rotate_log_event() + { + if (flags & DUP_NAME) + my_free((void*) new_log_ident); + } + Log_event_type get_type_code() { return ROTATE_EVENT;} + my_off_t get_header_len(my_off_t l __attribute__((unused))) + { return LOG_EVENT_MINIMAL_HEADER_LEN; } + int get_data_size() { return ident_len + ROTATE_HEADER_LEN;} + bool is_valid() const { return new_log_ident != 0; } +#ifdef MYSQL_SERVER + bool write(); +#endif + +private: +#if defined(MYSQL_SERVER) && defined(HAVE_REPLICATION) + virtual int do_update_pos(rpl_group_info *rgi); + virtual enum_skip_reason do_shall_skip(rpl_group_info *rgi); +#endif +}; + + +class Binlog_checkpoint_log_event: public Log_event +{ +public: + char *binlog_file_name; + uint binlog_file_len; + +#ifdef MYSQL_SERVER + Binlog_checkpoint_log_event(const char *binlog_file_name_arg, + uint binlog_file_len_arg); +#ifdef HAVE_REPLICATION + void pack_info(Protocol *protocol); +#endif +#else + bool print(FILE *file, PRINT_EVENT_INFO *print_event_info); +#endif + Binlog_checkpoint_log_event(const char *buf, uint event_len, + const Format_description_log_event *description_event); + ~Binlog_checkpoint_log_event() { my_free(binlog_file_name); } + Log_event_type get_type_code() { return BINLOG_CHECKPOINT_EVENT;} + int get_data_size() { return binlog_file_len + BINLOG_CHECKPOINT_HEADER_LEN;} + bool is_valid() const { return binlog_file_name != 0; } +#ifdef MYSQL_SERVER + bool write(); + enum_skip_reason do_shall_skip(rpl_group_info *rgi); +#endif +}; + + +/** + @class Gtid_log_event + + This event is logged as part of every event group to give the global + transaction id (GTID) of that group. + + It replaces the BEGIN query event used in earlier versions to begin most + event groups, but is also used for events that used to be stand-alone. + + @section Gtid_log_event_binary_format Binary Format + + The binary format for Gtid_log_event has 6 extra reserved bytes to make the + length a total of 19 byte (+ 19 bytes of header in common with all events). + This is just the minimal size for a BEGIN query event, which makes it easy + to replace this event with such BEGIN event to remain compatible with old + slave servers. + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + +
Post-Header
NameFormatDescription
seq_no8 byte unsigned integerincreasing id within one server_id. Starts at 1, holes in the sequence + may occur
domain_id4 byte unsigned integerReplication domain id, identifying independent replication streams>
flags1 byte bitfieldBit 0 set indicates stand-alone event (no terminating COMMIT)Bit 1 set indicates group commit, and that commit id existsBit 2 set indicates a transactional event group (can be safely rolled + back).Bit 3 set indicates that user allowed optimistic parallel apply (the + @@SESSION.replicate_allow_parallel value was true at commit).Bit 4 set indicates that this transaction encountered a row (or other) + lock wait during execution.
Reserved (no group commit) / commit id (group commit) (see flags bit 1)6 bytes / 8 bytesReserved bytes, set to 0. Maybe be used for future expansion (no + group commit). OR commit id, same for all GTIDs in the same group + commit (see flags bit 1).
+ + The Body of Gtid_log_event is empty. The total event size is 19 bytes + + the normal 19 bytes common-header. +*/ + +class Gtid_log_event: public Log_event +{ +public: + uint64 seq_no; + uint64 commit_id; + uint32 domain_id; +#ifdef MYSQL_SERVER + event_xid_t xid; +#else + event_mysql_xid_t xid; +#endif + uchar flags2; + /* Flags2. */ + + /* FL_STANDALONE is set when there is no terminating COMMIT event. */ + static const uchar FL_STANDALONE= 1; + /* + FL_GROUP_COMMIT_ID is set when event group is part of a group commit on the + master. Groups with same commit_id are part of the same group commit. + */ + static const uchar FL_GROUP_COMMIT_ID= 2; + /* + FL_TRANSACTIONAL is set for an event group that can be safely rolled back + (no MyISAM, eg.). + */ + static const uchar FL_TRANSACTIONAL= 4; + /* + FL_ALLOW_PARALLEL reflects the (negation of the) value of + @@SESSION.skip_parallel_replication at the time of commit. + */ + static const uchar FL_ALLOW_PARALLEL= 8; + /* + FL_WAITED is set if a row lock wait (or other wait) is detected during the + execution of the transaction. + */ + static const uchar FL_WAITED= 16; + /* FL_DDL is set for event group containing DDL. */ + static const uchar FL_DDL= 32; + /* FL_PREPARED_XA is set for XA transaction. */ + static const uchar FL_PREPARED_XA= 64; + /* FL_"COMMITTED or ROLLED-BACK"_XA is set for XA transaction. */ + static const uchar FL_COMPLETED_XA= 128; + +#ifdef MYSQL_SERVER + Gtid_log_event(THD *thd_arg, uint64 seq_no, uint32 domain_id, bool standalone, + uint16 flags, bool is_transactional, uint64 commit_id); +#ifdef HAVE_REPLICATION + void pack_info(Protocol *protocol); + virtual int do_apply_event(rpl_group_info *rgi); + virtual int do_update_pos(rpl_group_info *rgi); + virtual enum_skip_reason do_shall_skip(rpl_group_info *rgi); +#endif +#else + bool print(FILE *file, PRINT_EVENT_INFO *print_event_info); +#endif + Gtid_log_event(const char *buf, uint event_len, + const Format_description_log_event *description_event); + ~Gtid_log_event() { } + Log_event_type get_type_code() { return GTID_EVENT; } + enum_logged_status logged_status() { return LOGGED_NO_DATA; } + int get_data_size() + { + return GTID_HEADER_LEN + ((flags2 & FL_GROUP_COMMIT_ID) ? 2 : 0); + } + bool is_valid() const { return seq_no != 0; } +#ifdef MYSQL_SERVER + bool write(); + static int make_compatible_event(String *packet, bool *need_dummy_event, + ulong ev_offset, enum enum_binlog_checksum_alg checksum_alg); + static bool peek(const char *event_start, size_t event_len, + enum enum_binlog_checksum_alg checksum_alg, + uint32 *domain_id, uint32 *server_id, uint64 *seq_no, + uchar *flags2, const Format_description_log_event *fdev); +#endif +}; + + +/** + @class Gtid_list_log_event + + This event is logged at the start of every binlog file to record the + current replication state: the last global transaction id (GTID) applied + on the server within each replication domain. + + It consists of a list of GTIDs, one for each replication domain ever seen + on the server. + + @section Gtid_list_log_event_binary_format Binary Format + + + + + + + + + + + + + + + +
Post-Header
NameFormatDescription
count4 byte unsigned integerThe lower 28 bits are the number of GTIDs. The upper 4 bits are + flags bits.
+ + + + + + + + + + + + + + + + + + + + + + + + + + + +
Body
NameFormatDescription
domain_id4 byte unsigned integerReplication domain id of one GTID
server_id4 byte unsigned integerServer id of one GTID
seq_no8 byte unsigned integersequence number of one GTID
+ + The three elements in the body repeat COUNT times to form the GTID list. + + At the time of writing, only two flag bit are in use. + + Bit 28 of `count' is used for flag FLAG_UNTIL_REACHED, which is sent in a + Gtid_list event from the master to the slave to indicate that the START + SLAVE UNTIL master_gtid_pos=xxx condition has been reached. (This flag is + only sent in "fake" events generated on the fly, it is not written into + the binlog). +*/ + +class Gtid_list_log_event: public Log_event +{ +public: + uint32 count; + uint32 gl_flags; + struct rpl_gtid *list; + uint64 *sub_id_list; + + static const uint element_size= 4+4+8; + /* Upper bits stored in 'count'. See comment above */ + enum gtid_flags + { + FLAG_UNTIL_REACHED= (1<<28), + FLAG_IGN_GTIDS= (1<<29), + }; +#ifdef MYSQL_SERVER + Gtid_list_log_event(rpl_binlog_state *gtid_set, uint32 gl_flags); + Gtid_list_log_event(slave_connection_state *gtid_set, uint32 gl_flags); +#ifdef HAVE_REPLICATION + void pack_info(Protocol *protocol); +#endif +#else + bool print(FILE *file, PRINT_EVENT_INFO *print_event_info); +#endif + Gtid_list_log_event(const char *buf, uint event_len, + const Format_description_log_event *description_event); + ~Gtid_list_log_event() { my_free(list); my_free(sub_id_list); } + Log_event_type get_type_code() { return GTID_LIST_EVENT; } + int get_data_size() { + /* + Replacing with dummy event, needed for older slaves, requires a minimum + of 6 bytes in the body. + */ + return (count==0 ? + GTID_LIST_HEADER_LEN+2 : GTID_LIST_HEADER_LEN+count*element_size); + } + bool is_valid() const { return list != NULL; } +#if defined(MYSQL_SERVER) && defined(HAVE_REPLICATION) + bool to_packet(String *packet); + bool write(); + virtual int do_apply_event(rpl_group_info *rgi); + enum_skip_reason do_shall_skip(rpl_group_info *rgi); +#endif + static bool peek(const char *event_start, size_t event_len, + enum enum_binlog_checksum_alg checksum_alg, + rpl_gtid **out_gtid_list, uint32 *out_list_len, + const Format_description_log_event *fdev); +}; + + +/* the classes below are for the new LOAD DATA INFILE logging */ + +/** + @class Create_file_log_event + + @section Create_file_log_event_binary_format Binary Format +*/ + +class Create_file_log_event: public Load_log_event +{ +protected: + /* + Pretend we are Load event, so we can write out just + our Load part - used on the slave when writing event out to + SQL_LOAD-*.info file + */ + bool fake_base; +public: + uchar* block; + const char *event_buf; + uint block_len; + uint file_id; + bool inited_from_old; + +#ifdef MYSQL_SERVER + Create_file_log_event(THD* thd, sql_exchange* ex, const char* db_arg, + const char* table_name_arg, + List& fields_arg, + bool is_concurrent_arg, + enum enum_duplicates handle_dup, bool ignore, + uchar* block_arg, uint block_len_arg, + bool using_trans); +#ifdef HAVE_REPLICATION + void pack_info(Protocol* protocol); +#endif /* HAVE_REPLICATION */ +#else + bool print(FILE* file, PRINT_EVENT_INFO* print_event_info); + bool print(FILE* file, PRINT_EVENT_INFO* print_event_info, + bool enable_local); +#endif + + Create_file_log_event(const char* buf, uint event_len, + const Format_description_log_event* description_event); + ~Create_file_log_event() + { + my_free((void*) event_buf); + } + + Log_event_type get_type_code() + { + return fake_base ? Load_log_event::get_type_code() : CREATE_FILE_EVENT; + } + int get_data_size() + { + return (fake_base ? Load_log_event::get_data_size() : + Load_log_event::get_data_size() + + 4 + 1 + block_len); + } + bool is_valid() const { return inited_from_old || block != 0; } +#ifdef MYSQL_SERVER + bool write_data_header(); + bool write_data_body(); + /* + Cut out Create_file extensions and + write it as Load event - used on the slave + */ + bool write_base(); +#endif + +private: +#if defined(MYSQL_SERVER) && defined(HAVE_REPLICATION) + virtual int do_apply_event(rpl_group_info *rgi); +#endif +}; + + +/** + @class Append_block_log_event + + @section Append_block_log_event_binary_format Binary Format +*/ + +class Append_block_log_event: public Log_event +{ +public: + uchar* block; + uint block_len; + uint file_id; + /* + 'db' is filled when the event is created in mysql_load() (the + event needs to have a 'db' member to be well filtered by + binlog-*-db rules). 'db' is not written to the binlog (it's not + used by Append_block_log_event::write()), so it can't be read in + the Append_block_log_event(const char* buf, int event_len) + constructor. In other words, 'db' is used only for filtering by + binlog-*-db rules. Create_file_log_event is different: it's 'db' + (which is inherited from Load_log_event) is written to the binlog + and can be re-read. + */ + const char* db; + +#ifdef MYSQL_SERVER + Append_block_log_event(THD* thd, const char* db_arg, uchar* block_arg, + uint block_len_arg, bool using_trans); +#ifdef HAVE_REPLICATION + void pack_info(Protocol* protocol); + virtual int get_create_or_append() const; +#endif /* HAVE_REPLICATION */ +#else + bool print(FILE* file, PRINT_EVENT_INFO* print_event_info); +#endif + + Append_block_log_event(const char* buf, uint event_len, + const Format_description_log_event + *description_event); + ~Append_block_log_event() {} + Log_event_type get_type_code() { return APPEND_BLOCK_EVENT;} + int get_data_size() { return block_len + APPEND_BLOCK_HEADER_LEN ;} + bool is_valid() const { return block != 0; } +#ifdef MYSQL_SERVER + bool write(); + const char* get_db() { return db; } +#endif + +private: +#if defined(MYSQL_SERVER) && defined(HAVE_REPLICATION) + virtual int do_apply_event(rpl_group_info *rgi); +#endif +}; + + +/** + @class Delete_file_log_event + + @section Delete_file_log_event_binary_format Binary Format +*/ + +class Delete_file_log_event: public Log_event +{ +public: + uint file_id; + const char* db; /* see comment in Append_block_log_event */ + +#ifdef MYSQL_SERVER + Delete_file_log_event(THD* thd, const char* db_arg, bool using_trans); +#ifdef HAVE_REPLICATION + void pack_info(Protocol* protocol); +#endif /* HAVE_REPLICATION */ +#else + bool print(FILE* file, PRINT_EVENT_INFO* print_event_info); + bool print(FILE* file, PRINT_EVENT_INFO* print_event_info, + bool enable_local); +#endif + + Delete_file_log_event(const char* buf, uint event_len, + const Format_description_log_event* description_event); + ~Delete_file_log_event() {} + Log_event_type get_type_code() { return DELETE_FILE_EVENT;} + int get_data_size() { return DELETE_FILE_HEADER_LEN ;} + bool is_valid() const { return file_id != 0; } +#ifdef MYSQL_SERVER + bool write(); + const char* get_db() { return db; } +#endif + +private: +#if defined(MYSQL_SERVER) && defined(HAVE_REPLICATION) + virtual int do_apply_event(rpl_group_info *rgi); +#endif +}; + + +/** + @class Execute_load_log_event + + @section Delete_file_log_event_binary_format Binary Format +*/ + +class Execute_load_log_event: public Log_event +{ +public: + uint file_id; + const char* db; /* see comment in Append_block_log_event */ + +#ifdef MYSQL_SERVER + Execute_load_log_event(THD* thd, const char* db_arg, bool using_trans); +#ifdef HAVE_REPLICATION + void pack_info(Protocol* protocol); +#endif /* HAVE_REPLICATION */ +#else + bool print(FILE* file, PRINT_EVENT_INFO* print_event_info); +#endif + + Execute_load_log_event(const char* buf, uint event_len, + const Format_description_log_event + *description_event); + ~Execute_load_log_event() {} + Log_event_type get_type_code() { return EXEC_LOAD_EVENT;} + int get_data_size() { return EXEC_LOAD_HEADER_LEN ;} + bool is_valid() const { return file_id != 0; } +#ifdef MYSQL_SERVER + bool write(); + const char* get_db() { return db; } +#endif + +private: +#if defined(MYSQL_SERVER) && defined(HAVE_REPLICATION) + virtual int do_apply_event(rpl_group_info *rgi); +#endif +}; + + +/** + @class Begin_load_query_log_event + + Event for the first block of file to be loaded, its only difference from + Append_block event is that this event creates or truncates existing file + before writing data. + + @section Begin_load_query_log_event_binary_format Binary Format +*/ +class Begin_load_query_log_event: public Append_block_log_event +{ +public: +#ifdef MYSQL_SERVER + Begin_load_query_log_event(THD* thd_arg, const char *db_arg, + uchar* block_arg, uint block_len_arg, + bool using_trans); +#ifdef HAVE_REPLICATION + Begin_load_query_log_event(THD* thd); + int get_create_or_append() const; +#endif /* HAVE_REPLICATION */ +#endif + Begin_load_query_log_event(const char* buf, uint event_len, + const Format_description_log_event + *description_event); + ~Begin_load_query_log_event() {} + Log_event_type get_type_code() { return BEGIN_LOAD_QUERY_EVENT; } +private: +#if defined(MYSQL_SERVER) && defined(HAVE_REPLICATION) + virtual enum_skip_reason do_shall_skip(rpl_group_info *rgi); +#endif +}; + + +/* + Elements of this enum describe how LOAD DATA handles duplicates. +*/ +enum enum_load_dup_handling { LOAD_DUP_ERROR= 0, LOAD_DUP_IGNORE, + LOAD_DUP_REPLACE }; + +/** + @class Execute_load_query_log_event + + Event responsible for LOAD DATA execution, it similar to Query_log_event + but before executing the query it substitutes original filename in LOAD DATA + query with name of temporary file. + + @section Execute_load_query_log_event_binary_format Binary Format +*/ +class Execute_load_query_log_event: public Query_log_event +{ +public: + uint file_id; // file_id of temporary file + uint fn_pos_start; // pointer to the part of the query that should + // be substituted + uint fn_pos_end; // pointer to the end of this part of query + /* + We have to store type of duplicate handling explicitly, because + for LOAD DATA it also depends on LOCAL option. And this part + of query will be rewritten during replication so this information + may be lost... + */ + enum_load_dup_handling dup_handling; + +#ifdef MYSQL_SERVER + Execute_load_query_log_event(THD* thd, const char* query_arg, + ulong query_length, uint fn_pos_start_arg, + uint fn_pos_end_arg, + enum_load_dup_handling dup_handling_arg, + bool using_trans, bool direct, + bool suppress_use, int errcode); +#ifdef HAVE_REPLICATION + void pack_info(Protocol* protocol); +#endif /* HAVE_REPLICATION */ +#else + bool print(FILE* file, PRINT_EVENT_INFO* print_event_info); + /* Prints the query as LOAD DATA LOCAL and with rewritten filename */ + bool print(FILE* file, PRINT_EVENT_INFO* print_event_info, + const char *local_fname); +#endif + Execute_load_query_log_event(const char* buf, uint event_len, + const Format_description_log_event + *description_event); + ~Execute_load_query_log_event() {} + + Log_event_type get_type_code() { return EXECUTE_LOAD_QUERY_EVENT; } + bool is_valid() const { return Query_log_event::is_valid() && file_id != 0; } + + ulong get_post_header_size_for_derived(); +#ifdef MYSQL_SERVER + bool write_post_header_for_derived(); +#endif + +private: +#if defined(MYSQL_SERVER) && defined(HAVE_REPLICATION) + virtual int do_apply_event(rpl_group_info *rgi); +#endif +}; + + +#ifdef MYSQL_CLIENT +/** + @class Unknown_log_event + + @section Unknown_log_event_binary_format Binary Format +*/ +class Unknown_log_event: public Log_event +{ +public: + enum { UNKNOWN, ENCRYPTED } what; + /* + Even if this is an unknown event, we still pass description_event to + Log_event's ctor, this way we can extract maximum information from the + event's header (the unique ID for example). + */ + Unknown_log_event(const char* buf, + const Format_description_log_event *description_event): + Log_event(buf, description_event), what(UNKNOWN) + {} + /* constructor for hopelessly corrupted events */ + Unknown_log_event(): Log_event(), what(ENCRYPTED) {} + ~Unknown_log_event() {} + bool print(FILE* file, PRINT_EVENT_INFO* print_event_info); + Log_event_type get_type_code() { return UNKNOWN_EVENT;} + bool is_valid() const { return 1; } +}; +#endif +char *str_to_hex(char *to, const char *from, size_t len); + +/** + @class Annotate_rows_log_event + + In row-based mode, if binlog_annotate_row_events = ON, each group of + Table_map_log_events is preceded by an Annotate_rows_log_event which + contains the query which caused the subsequent rows operations. + + The Annotate_rows_log_event has no post-header and its body contains + the corresponding query (without trailing zero). Note. The query length + is to be calculated as a difference between the whole event length and + the common header length. +*/ +class Annotate_rows_log_event: public Log_event +{ +public: +#ifndef MYSQL_CLIENT + Annotate_rows_log_event(THD*, bool using_trans, bool direct); +#endif + Annotate_rows_log_event(const char *buf, uint event_len, + const Format_description_log_event*); + ~Annotate_rows_log_event(); + + virtual int get_data_size(); + virtual Log_event_type get_type_code(); + enum_logged_status logged_status() { return LOGGED_NO_DATA; } + virtual bool is_valid() const; + virtual bool is_part_of_group() { return 1; } + +#ifndef MYSQL_CLIENT + virtual bool write_data_header(); + virtual bool write_data_body(); +#endif + +#if !defined(MYSQL_CLIENT) && defined(HAVE_REPLICATION) + virtual void pack_info(Protocol*); +#endif + +#ifdef MYSQL_CLIENT + virtual bool print(FILE*, PRINT_EVENT_INFO*); +#endif + +#if !defined(MYSQL_CLIENT) && defined(HAVE_REPLICATION) +private: + virtual int do_apply_event(rpl_group_info *rgi); + virtual int do_update_pos(rpl_group_info *rgi); + virtual enum_skip_reason do_shall_skip(rpl_group_info*); +#endif + +private: + char *m_query_txt; + uint m_query_len; + char *m_save_thd_query_txt; + uint m_save_thd_query_len; + bool m_saved_thd_query; + bool m_used_query_txt; +}; + +/** + @class Table_map_log_event + + In row-based mode, every row operation event is preceded by a + Table_map_log_event which maps a table definition to a number. The + table definition consists of database name, table name, and column + definitions. + + @section Table_map_log_event_binary_format Binary Format + + The Post-Header has the following components: + + + + + + + + + + + + + + + + + + + + + + +
Post-Header for Table_map_log_event
NameFormatDescription
table_id6 bytes unsigned integerThe number that identifies the table.
flags2 byte bitfieldReserved for future use; currently always 0.
+ + The Body has the following components: + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + +
Body for Table_map_log_event
NameFormatDescription
database_nameone byte string length, followed by null-terminated stringThe name of the database in which the table resides. The name + is represented as a one byte unsigned integer representing the + number of bytes in the name, followed by length bytes containing + the database name, followed by a terminating 0 byte. (Note the + redundancy in the representation of the length.)
table_nameone byte string length, followed by null-terminated stringThe name of the table, encoded the same way as the database + name above.
column_count@ref packed_integer "Packed Integer"The number of columns in the table, represented as a packed + variable-length integer.
column_typeList of column_count 1 byte enumeration valuesThe type of each column in the table, listed from left to + right. Each byte is mapped to a column type according to the + enumeration type enum_field_types defined in mysql_com.h. The + mapping of types to numbers is listed in the table @ref + Table_table_map_log_event_column_types "below" (along with + description of the associated metadata field).
metadata_length@ref packed_integer "Packed Integer"The length of the following metadata block
metadatalist of metadata for each columnFor each column from left to right, a chunk of data who's + length and semantics depends on the type of the column. The + length and semantics for the metadata for each column are listed + in the table @ref Table_table_map_log_event_column_types + "below".
null_bitscolumn_count bits, rounded up to nearest byteFor each column, a bit indicating whether data in the column + can be NULL or not. The number of bytes needed for this is + int((column_count+7)/8). The flag for the first column from the + left is in the least-significant bit of the first byte, the second + is in the second least significant bit of the first byte, the + ninth is in the least significant bit of the second byte, and so + on.
optional metadata fieldsoptional metadata fields are stored in Type, Length, Value(TLV) format. + Type takes 1 byte. Length is a packed integer value. Values takes + Length bytes. + There are some optional metadata defined. They are listed in the table + @ref Table_table_map_event_optional_metadata. Optional metadata fields + follow null_bits. Whether binlogging an optional metadata is decided by the + server. The order is not defined, so they can be binlogged in any order. +
+ + The table below lists all column types, along with the numerical + identifier for it and the size and interpretation of meta-data used + to describe the type. + + @anchor Table_table_map_log_event_column_types + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + +
Table_map_log_event column types: numerical identifier and + metadata
NameIdentifierSize of metadata in bytesDescription of metadata
MYSQL_TYPE_DECIMAL00No column metadata.
MYSQL_TYPE_TINY10No column metadata.
MYSQL_TYPE_SHORT20No column metadata.
MYSQL_TYPE_LONG30No column metadata.
MYSQL_TYPE_FLOAT41 byte1 byte unsigned integer, representing the "pack_length", which + is equal to sizeof(float) on the server from which the event + originates.
MYSQL_TYPE_DOUBLE51 byte1 byte unsigned integer, representing the "pack_length", which + is equal to sizeof(double) on the server from which the event + originates.
MYSQL_TYPE_NULL60No column metadata.
MYSQL_TYPE_TIMESTAMP70No column metadata.
MYSQL_TYPE_LONGLONG80No column metadata.
MYSQL_TYPE_INT2490No column metadata.
MYSQL_TYPE_DATE100No column metadata.
MYSQL_TYPE_TIME110No column metadata.
MYSQL_TYPE_DATETIME120No column metadata.
MYSQL_TYPE_YEAR130No column metadata.
MYSQL_TYPE_NEWDATE14–This enumeration value is only used internally and cannot + exist in a binlog.
MYSQL_TYPE_VARCHAR152 bytes2 byte unsigned integer representing the maximum length of + the string.
MYSQL_TYPE_BIT162 bytesA 1 byte unsigned int representing the length in bits of the + bitfield (0 to 64), followed by a 1 byte unsigned int + representing the number of bytes occupied by the bitfield. The + number of bytes is either int((length+7)/8) or int(length/8).
MYSQL_TYPE_NEWDECIMAL2462 bytesA 1 byte unsigned int representing the precision, followed + by a 1 byte unsigned int representing the number of decimals.
MYSQL_TYPE_ENUM247–This enumeration value is only used internally and cannot + exist in a binlog.
MYSQL_TYPE_SET248–This enumeration value is only used internally and cannot + exist in a binlog.
MYSQL_TYPE_TINY_BLOB249–This enumeration value is only used internally and cannot + exist in a binlog.
MYSQL_TYPE_MEDIUM_BLOB250–This enumeration value is only used internally and cannot + exist in a binlog.
MYSQL_TYPE_LONG_BLOB251–This enumeration value is only used internally and cannot + exist in a binlog.
MYSQL_TYPE_BLOB2521 byteThe pack length, i.e., the number of bytes needed to represent + the length of the blob: 1, 2, 3, or 4.
MYSQL_TYPE_VAR_STRING2532 bytesThis is used to store both strings and enumeration values. + The first byte is a enumeration value storing the real + type, which may be either MYSQL_TYPE_VAR_STRING or + MYSQL_TYPE_ENUM. The second byte is a 1 byte unsigned integer + representing the field size, i.e., the number of bytes needed to + store the length of the string.
MYSQL_TYPE_STRING2542 bytesThe first byte is always MYSQL_TYPE_VAR_STRING (i.e., 253). + The second byte is the field size, i.e., the number of bytes in + the representation of size of the string: 3 or 4.
MYSQL_TYPE_GEOMETRY2551 byteThe pack length, i.e., the number of bytes needed to represent + the length of the geometry: 1, 2, 3, or 4.
+ The table below lists all optional metadata types, along with the numerical + identifier for it and the size and interpretation of meta-data used + to describe the type. + + @anchor Table_table_map_event_optional_metadata + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + +
Table_map_event optional metadata types: numerical identifier and + metadata. Optional metadata fields are stored in TLV fields. + Format of values are described in this table.
TypeDescriptionFormat
SIGNEDNESSsignedness of numeric colums. This is included for all values of + binlog_row_metadata.For each numeric column, a bit indicates whether the numeric + colunm has unsigned flag. 1 means it is unsigned. The number of + bytes needed for this is int((column_count + 7) / 8). The order is + the same as the order of column_type field.
DEFAULT_CHARSETCharsets of character columns. It has a default charset for + the case that most of character columns have same charset and the + most used charset is binlogged as default charset.Collation + numbers are binlogged for identifying charsets. They are stored in + packed length format. Either DEFAULT_CHARSET or COLUMN_CHARSET is + included for all values of binlog_row_metadata.Default charset's collation is logged first. The charsets which are not + same to default charset are logged following default charset. They are + logged as column index and charset collation number pair sequence. The + column index is counted only in all character columns. The order is same to + the order of column_type + field.
COLUMN_CHARSETCharsets of character columns. For the case that most of columns have + different charsets, this field is logged. It is never logged with + DEFAULT_CHARSET together. Either DEFAULT_CHARSET or COLUMN_CHARSET is + included for all values of binlog_row_metadata.It is a collation number sequence for all character columns.
COLUMN_NAMENames of columns. This is only included if + binlog_row_metadata=FULL.A sequence of column names. For each column name, 1 byte for + the string length in bytes is followed by a string without null + terminator.
SET_STR_VALUEThe string values of SET columns. This is only included if + binlog_row_metadata=FULL.For each SET column, a pack_length representing the value + count is followed by a sequence of length and string pairs. length + is the byte count in pack_length format. The string has no null + terminator.
ENUM_STR_VALUEThe string values is ENUM columns. This is only included + if binlog_row_metadata=FULL.The format is the same as SET_STR_VALUE.
GEOMETRY_TYPEThe real type of geometry columns. This is only included + if binlog_row_metadata=FULL.A sequence of real type of geometry columns are stored in pack_length + format.
SIMPLE_PRIMARY_KEYThe primary key without any prefix. This is only included + if binlog_row_metadata=FULL and there is a primary key where every + key part covers an entire column.A sequence of column indexes. The indexes are stored in pack_length + format.
PRIMARY_KEY_WITH_PREFIXThe primary key with some prefix. It doesn't appear together with + SIMPLE_PRIMARY_KEY. This is only included if + binlog_row_metadata=FULL and there is a primary key where some key + part covers a prefix of the column.A sequence of column index and prefix length pairs. Both + column index and prefix length are in pack_length format. Prefix length + 0 means that the whole column value is used.
ENUM_AND_SET_DEFAULT_CHARSETCharsets of ENUM and SET columns. It has the same layout as + DEFAULT_CHARSET. If there are SET or ENUM columns and + binlog_row_metadata=FULL, exactly one of + ENUM_AND_SET_DEFAULT_CHARSET and ENUM_AND_SET_COLUMN_CHARSET + appears (the encoder chooses the representation that uses the + least amount of space). Otherwise, none of them appears.The same format as for DEFAULT_CHARSET, except it counts ENUM + and SET columns rather than character columns.
ENUM_AND_SET_COLUMN_CHARSETCharsets of ENUM and SET columns. It has the same layout as + COLUMN_CHARSET. If there are SET or ENUM columns and + binlog_row_metadata=FULL, exactly one of + ENUM_AND_SET_DEFAULT_CHARSET and ENUM_AND_SET_COLUMN_CHARSET + appears (the encoder chooses the representation that uses the + least amount of space). Otherwise, none of them appears.The same format as for COLUMN_CHARSET, except it counts ENUM + and SET columns rather than character columns.
+*/ +class Table_map_log_event : public Log_event +{ +public: + /* Constants */ + enum + { + TYPE_CODE = TABLE_MAP_EVENT + }; + + /** + Enumeration of the errors that can be returned. + */ + enum enum_error + { + ERR_OPEN_FAILURE = -1, /**< Failure to open table */ + ERR_OK = 0, /**< No error */ + ERR_TABLE_LIMIT_EXCEEDED = 1, /**< No more room for tables */ + ERR_OUT_OF_MEM = 2, /**< Out of memory */ + ERR_BAD_TABLE_DEF = 3, /**< Table definition does not match */ + ERR_RBR_TO_SBR = 4 /**< daisy-chanining RBR to SBR not allowed */ + }; + + enum enum_flag + { + /* + Nothing here right now, but the flags support is there in + preparation for changes that are coming. Need to add a + constant to make it compile under HP-UX: aCC does not like + empty enumerations. + */ + ENUM_FLAG_COUNT + }; + + typedef uint16 flag_set; + /** + DEFAULT_CHARSET and COLUMN_CHARSET don't appear together, and + ENUM_AND_SET_DEFAULT_CHARSET and ENUM_AND_SET_COLUMN_CHARSET don't + appear together. They are just alternative ways to pack character + set information. When binlogging, it logs character sets in the + way that occupies least storage. + + SIMPLE_PRIMARY_KEY and PRIMARY_KEY_WITH_PREFIX don't appear together. + SIMPLE_PRIMARY_KEY is for the primary keys which only use whole values of + pk columns. PRIMARY_KEY_WITH_PREFIX is + for the primary keys which just use part value of pk columns. + */ + enum Optional_metadata_field_type + { + SIGNEDNESS = 1, // UNSIGNED flag of numeric columns + DEFAULT_CHARSET, /* Character set of string columns, optimized to + minimize space when many columns have the + same charset. */ + COLUMN_CHARSET, /* Character set of string columns, optimized to + minimize space when columns have many + different charsets. */ + COLUMN_NAME, + SET_STR_VALUE, // String value of SET columns + ENUM_STR_VALUE, // String value of ENUM columns + GEOMETRY_TYPE, // Real type of geometry columns + SIMPLE_PRIMARY_KEY, // Primary key without prefix + PRIMARY_KEY_WITH_PREFIX, // Primary key with prefix + ENUM_AND_SET_DEFAULT_CHARSET, /* Character set of enum and set + columns, optimized to minimize + space when many columns have the + same charset. */ + ENUM_AND_SET_COLUMN_CHARSET, /* Character set of enum and set + columns, optimized to minimize + space when many columns have the + same charset. */ + }; + /** + Metadata_fields organizes m_optional_metadata into a structured format which + is easy to access. + */ + // Values for binlog_row_metadata sysvar + enum enum_binlog_row_metadata + { + BINLOG_ROW_METADATA_NO_LOG= 0, + BINLOG_ROW_METADATA_MINIMAL= 1, + BINLOG_ROW_METADATA_FULL= 2 + }; + struct Optional_metadata_fields + { + typedef std::pair uint_pair; + typedef std::vector str_vector; + + struct Default_charset + { + Default_charset() : default_charset(0) {} + bool empty() const { return default_charset == 0; } + + // Default charset for the columns which are not in charset_pairs. + unsigned int default_charset; + + /* The uint_pair means . */ + std::vector charset_pairs; + }; + + // Contents of DEFAULT_CHARSET field is converted into Default_charset. + Default_charset m_default_charset; + // Contents of ENUM_AND_SET_DEFAULT_CHARSET are converted into + // Default_charset. + Default_charset m_enum_and_set_default_charset; + std::vector m_signedness; + // Character set number of every string column + std::vector m_column_charset; + // Character set number of every ENUM or SET column. + std::vector m_enum_and_set_column_charset; + std::vector m_column_name; + // each str_vector stores values of one enum/set column + std::vector m_enum_str_value; + std::vector m_set_str_value; + std::vector m_geometry_type; + /* + The uint_pair means . Prefix length is 0 if + whole column value is used. + */ + std::vector m_primary_key; + + /* + It parses m_optional_metadata and populates into above variables. + + @param[in] optional_metadata points to the begin of optional metadata + fields in table_map_event. + @param[in] optional_metadata_len length of optional_metadata field. + */ + Optional_metadata_fields(unsigned char* optional_metadata, + unsigned int optional_metadata_len); + }; + + /** + Print column metadata. Its format looks like: + # Columns(colume_name type, colume_name type, ...) + if colume_name field is not logged into table_map_log_event, then + only type is printed. + + @@param[out] file the place where colume metadata is printed + @@param[in] The metadata extracted from optional metadata fields + */ + void print_columns(IO_CACHE *file, + const Optional_metadata_fields &fields); + /** + Print primary information. Its format looks like: + # Primary Key(colume_name, column_name(prifix), ...) + if colume_name field is not logged into table_map_log_event, then + colume index is printed. + + @@param[out] file the place where primary key is printed + @@param[in] The metadata extracted from optional metadata fields + */ + void print_primary_key(IO_CACHE *file, + const Optional_metadata_fields &fields); + + /* Special constants representing sets of flags */ + enum + { + TM_NO_FLAGS = 0U, + TM_BIT_LEN_EXACT_F = (1U << 0), + // MariaDB flags (we starts from the other end) + TM_BIT_HAS_TRIGGERS_F= (1U << 14) + }; + + flag_set get_flags(flag_set flag) const { return m_flags & flag; } + +#ifdef MYSQL_SERVER + Table_map_log_event(THD *thd, TABLE *tbl, ulong tid, bool is_transactional); +#endif +#ifdef HAVE_REPLICATION + Table_map_log_event(const char *buf, uint event_len, + const Format_description_log_event *description_event); +#endif + + ~Table_map_log_event(); + +#ifdef MYSQL_CLIENT + table_def *create_table_def() + { + return new table_def(m_coltype, m_colcnt, m_field_metadata, + m_field_metadata_size, m_null_bits, m_flags); + } + int rewrite_db(const char* new_name, size_t new_name_len, + const Format_description_log_event*); +#endif + ulonglong get_table_id() const { return m_table_id; } + const char *get_table_name() const { return m_tblnam; } + const char *get_db_name() const { return m_dbnam; } + + virtual Log_event_type get_type_code() { return TABLE_MAP_EVENT; } + virtual enum_logged_status logged_status() { return LOGGED_TABLE_MAP; } + virtual bool is_valid() const { return m_memory != NULL; /* we check malloc */ } + virtual bool is_part_of_group() { return 1; } + + virtual int get_data_size() { return (uint) m_data_size; } +#ifdef MYSQL_SERVER + virtual int save_field_metadata(); + virtual bool write_data_header(); + virtual bool write_data_body(); + virtual const char *get_db() { return m_dbnam; } +#endif + +#if defined(MYSQL_SERVER) && defined(HAVE_REPLICATION) + virtual void pack_info(Protocol *protocol); +#endif + +#ifdef MYSQL_CLIENT + virtual bool print(FILE *file, PRINT_EVENT_INFO *print_event_info); +#endif + + +private: +#if defined(MYSQL_SERVER) && defined(HAVE_REPLICATION) + virtual int do_apply_event(rpl_group_info *rgi); + virtual int do_update_pos(rpl_group_info *rgi); + virtual enum_skip_reason do_shall_skip(rpl_group_info *rgi); +#endif + +#ifdef MYSQL_SERVER + TABLE *m_table; + Binlog_type_info *binlog_type_info_array; + + + // Metadata fields buffer + StringBuffer<1024> m_metadata_buf; + + /** + Capture the optional metadata fields which should be logged into + table_map_log_event and serialize them into m_metadata_buf. + */ + void init_metadata_fields(); + bool init_signedness_field(); + /** + Capture and serialize character sets. Character sets for + character columns (TEXT etc) and character sets for ENUM and SET + columns are stored in different metadata fields. The reason is + that TEXT character sets are included even when + binlog_row_metadata=MINIMAL, whereas ENUM and SET character sets + are included only when binlog_row_metadata=FULL. + + @param include_type Predicate to determine if a given Field object + is to be included in the metadata field. + + @param default_charset_type Type code when storing in "default + charset" format. (See comment above Table_maps_log_event in + libbinlogevents/include/rows_event.h) + + @param column_charset_type Type code when storing in "column + charset" format. (See comment above Table_maps_log_event in + libbinlogevents/include/rows_event.h) + */ + bool init_charset_field(bool(* include_type)(Binlog_type_info *, Field *), + Optional_metadata_field_type default_charset_type, + Optional_metadata_field_type column_charset_type); + bool init_column_name_field(); + bool init_set_str_value_field(); + bool init_enum_str_value_field(); + bool init_geometry_type_field(); + bool init_primary_key_field(); +#endif + +#ifdef MYSQL_CLIENT + class Charset_iterator; + class Default_charset_iterator; + class Column_charset_iterator; +#endif + char const *m_dbnam; + size_t m_dblen; + char const *m_tblnam; + size_t m_tbllen; + ulong m_colcnt; + uchar *m_coltype; + + uchar *m_memory; + ulonglong m_table_id; + flag_set m_flags; + + size_t m_data_size; + + uchar *m_field_metadata; // buffer for field metadata + /* + The size of field metadata buffer set by calling save_field_metadata() + */ + ulong m_field_metadata_size; + uchar *m_null_bits; + uchar *m_meta_memory; + unsigned int m_optional_metadata_len; + unsigned char *m_optional_metadata; +}; + + +/** + @class Rows_log_event + + Common base class for all row-containing log events. + + RESPONSIBILITIES + + Encode the common parts of all events containing rows, which are: + - Write data header and data body to an IO_CACHE. + - Provide an interface for adding an individual row to the event. + + @section Rows_log_event_binary_format Binary Format +*/ + + +class Rows_log_event : public Log_event +{ +public: + /** + Enumeration of the errors that can be returned. + */ + enum enum_error + { + ERR_OPEN_FAILURE = -1, /**< Failure to open table */ + ERR_OK = 0, /**< No error */ + ERR_TABLE_LIMIT_EXCEEDED = 1, /**< No more room for tables */ + ERR_OUT_OF_MEM = 2, /**< Out of memory */ + ERR_BAD_TABLE_DEF = 3, /**< Table definition does not match */ + ERR_RBR_TO_SBR = 4 /**< daisy-chanining RBR to SBR not allowed */ + }; + + /* + These definitions allow you to combine the flags into an + appropriate flag set using the normal bitwise operators. The + implicit conversion from an enum-constant to an integer is + accepted by the compiler, which is then used to set the real set + of flags. + */ + enum enum_flag + { + /* Last event of a statement */ + STMT_END_F = (1U << 0), + + /* Value of the OPTION_NO_FOREIGN_KEY_CHECKS flag in thd->options */ + NO_FOREIGN_KEY_CHECKS_F = (1U << 1), + + /* Value of the OPTION_RELAXED_UNIQUE_CHECKS flag in thd->options */ + RELAXED_UNIQUE_CHECKS_F = (1U << 2), + + /** + Indicates that rows in this event are complete, that is contain + values for all columns of the table. + */ + COMPLETE_ROWS_F = (1U << 3), + + /* Value of the OPTION_NO_CHECK_CONSTRAINT_CHECKS flag in thd->options */ + NO_CHECK_CONSTRAINT_CHECKS_F = (1U << 7) + }; + + typedef uint16 flag_set; + + /* Special constants representing sets of flags */ + enum + { + RLE_NO_FLAGS = 0U + }; + + virtual ~Rows_log_event(); + + void set_flags(flag_set flags_arg) { m_flags |= flags_arg; } + void clear_flags(flag_set flags_arg) { m_flags &= ~flags_arg; } + flag_set get_flags(flag_set flags_arg) const { return m_flags & flags_arg; } + void update_flags() { int2store(temp_buf + m_flags_pos, m_flags); } + + Log_event_type get_type_code() { return m_type; } /* Specific type (_V1 etc) */ + enum_logged_status logged_status() { return LOGGED_ROW_EVENT; } + virtual Log_event_type get_general_type_code() = 0; /* General rows op type, no version */ + +#if defined(MYSQL_SERVER) && defined(HAVE_REPLICATION) + virtual void pack_info(Protocol *protocol); +#endif + +#ifdef MYSQL_CLIENT + /* not for direct call, each derived has its own ::print() */ + virtual bool print(FILE *file, PRINT_EVENT_INFO *print_event_info)= 0; + void change_to_flashback_event(PRINT_EVENT_INFO *print_event_info, uchar *rows_buff, Log_event_type ev_type); + bool print_verbose(IO_CACHE *file, + PRINT_EVENT_INFO *print_event_info); + size_t print_verbose_one_row(IO_CACHE *file, table_def *td, + PRINT_EVENT_INFO *print_event_info, + MY_BITMAP *cols_bitmap, + const uchar *ptr, const uchar *prefix, + const my_bool no_fill_output= 0); // if no_fill_output=1, then print result is unnecessary + size_t calc_row_event_length(table_def *td, + PRINT_EVENT_INFO *print_event_info, + MY_BITMAP *cols_bitmap, + const uchar *value); + void count_row_events(PRINT_EVENT_INFO *print_event_info); + +#endif + +#ifdef MYSQL_SERVER + int add_row_data(uchar *data, size_t length) + { + return do_add_row_data(data,length); + } +#endif + + /* Member functions to implement superclass interface */ + virtual int get_data_size(); + + MY_BITMAP const *get_cols() const { return &m_cols; } + MY_BITMAP const *get_cols_ai() const { return &m_cols_ai; } + size_t get_width() const { return m_width; } + ulonglong get_table_id() const { return m_table_id; } + +#if defined(MYSQL_SERVER) + /* + This member function compares the table's read/write_set + with this event's m_cols and m_cols_ai. Comparison takes + into account what type of rows event is this: Delete, Write or + Update, therefore it uses the correct m_cols[_ai] according + to the event type code. + + Note that this member function should only be called for the + following events: + - Delete_rows_log_event + - Write_rows_log_event + - Update_rows_log_event + + @param[IN] table The table to compare this events bitmaps + against. + + @return TRUE if sets match, FALSE otherwise. (following + bitmap_cmp return logic). + + */ + bool read_write_bitmaps_cmp(TABLE *table) + { + bool res= FALSE; + + switch (get_general_type_code()) + { + case DELETE_ROWS_EVENT: + res= bitmap_cmp(get_cols(), table->read_set); + break; + case UPDATE_ROWS_EVENT: + res= (bitmap_cmp(get_cols(), table->read_set) && + bitmap_cmp(get_cols_ai(), table->rpl_write_set)); + break; + case WRITE_ROWS_EVENT: + res= bitmap_cmp(get_cols(), table->rpl_write_set); + break; + default: + /* + We should just compare bitmaps for Delete, Write + or Update rows events. + */ + DBUG_ASSERT(0); + } + return res; + } +#endif + +#ifdef MYSQL_SERVER + virtual bool write_data_header(); + virtual bool write_data_body(); + virtual bool write_compressed(); + virtual const char *get_db() { return m_table->s->db.str; } +#endif + /* + Check that malloc() succeeded in allocating memory for the rows + buffer and the COLS vector. Checking that an Update_rows_log_event + is valid is done in the Update_rows_log_event::is_valid() + function. + */ + virtual bool is_valid() const + { + return m_rows_buf && m_cols.bitmap; + } + bool is_part_of_group() { return get_flags(STMT_END_F) != 0; } + + uint m_row_count; /* The number of rows added to the event */ + + const uchar* get_extra_row_data() const { return m_extra_row_data; } + +#if defined(MYSQL_SERVER) && defined(HAVE_REPLICATION) + virtual uint8 get_trg_event_map()= 0; + + inline bool do_invoke_trigger() + { + return (slave_run_triggers_for_rbr && !master_had_triggers) || + slave_run_triggers_for_rbr == SLAVE_RUN_TRIGGERS_FOR_RBR_ENFORCE; + } +#endif + +protected: + /* + The constructors are protected since you're supposed to inherit + this class, not create instances of this class. + */ +#ifdef MYSQL_SERVER + Rows_log_event(THD*, TABLE*, ulong table_id, + MY_BITMAP const *cols, bool is_transactional, + Log_event_type event_type); +#endif + Rows_log_event(const char *row_data, uint event_len, + const Format_description_log_event *description_event); + void uncompress_buf(); + +#ifdef MYSQL_CLIENT + bool print_helper(FILE *, PRINT_EVENT_INFO *, char const *const name); +#endif + +#ifdef MYSQL_SERVER + virtual int do_add_row_data(uchar *data, size_t length); +#endif + +#ifdef MYSQL_SERVER + TABLE *m_table; /* The table the rows belong to */ +#endif + ulonglong m_table_id; /* Table ID */ + MY_BITMAP m_cols; /* Bitmap denoting columns available */ + ulong m_width; /* The width of the columns bitmap */ + /* + Bitmap for columns available in the after image, if present. These + fields are only available for Update_rows events. Observe that the + width of both the before image COLS vector and the after image + COLS vector is the same: the number of columns of the table on the + master. + */ + MY_BITMAP m_cols_ai; + + ulong m_master_reclength; /* Length of record on master side */ + + /* Bit buffers in the same memory as the class */ + uint32 m_bitbuf[128/(sizeof(uint32)*8)]; + uint32 m_bitbuf_ai[128/(sizeof(uint32)*8)]; + + uchar *m_rows_buf; /* The rows in packed format */ + uchar *m_rows_cur; /* One-after the end of the data */ + uchar *m_rows_end; /* One-after the end of the allocated space */ + + size_t m_rows_before_size; /* The length before m_rows_buf */ + size_t m_flags_pos; /* The position of the m_flags */ + + flag_set m_flags; /* Flags for row-level events */ + + Log_event_type m_type; /* Actual event type */ + + uchar *m_extra_row_data; /* Pointer to extra row data if any */ + /* If non null, first byte is length */ + + bool m_vers_from_plain; + + + /* helper functions */ + +#if defined(MYSQL_SERVER) && defined(HAVE_REPLICATION) + const uchar *m_curr_row; /* Start of the row being processed */ + const uchar *m_curr_row_end; /* One-after the end of the current row */ + uchar *m_key; /* Buffer to keep key value during searches */ + KEY *m_key_info; /* Pointer to KEY info for m_key_nr */ + uint m_key_nr; /* Key number */ + bool master_had_triggers; /* set after tables opening */ + + int find_key(); // Find a best key to use in find_row() + int find_row(rpl_group_info *); + int write_row(rpl_group_info *, const bool); + int update_sequence(); + + // Unpack the current row into m_table->record[0], but with + // a different columns bitmap. + int unpack_current_row(rpl_group_info *rgi, MY_BITMAP const *cols) + { + DBUG_ASSERT(m_table); + + ASSERT_OR_RETURN_ERROR(m_curr_row <= m_rows_end, HA_ERR_CORRUPT_EVENT); + return ::unpack_row(rgi, m_table, m_width, m_curr_row, cols, + &m_curr_row_end, &m_master_reclength, m_rows_end); + } + + // Unpack the current row into m_table->record[0] + int unpack_current_row(rpl_group_info *rgi) + { + DBUG_ASSERT(m_table); + + ASSERT_OR_RETURN_ERROR(m_curr_row <= m_rows_end, HA_ERR_CORRUPT_EVENT); + return ::unpack_row(rgi, m_table, m_width, m_curr_row, &m_cols, + &m_curr_row_end, &m_master_reclength, m_rows_end); + } + bool process_triggers(trg_event_type event, + trg_action_time_type time_type, + bool old_row_is_record1); + + /** + Helper function to check whether there is an auto increment + column on the table where the event is to be applied. + + @return true if there is an autoincrement field on the extra + columns, false otherwise. + */ + inline bool is_auto_inc_in_extra_columns() + { + DBUG_ASSERT(m_table); + return (m_table->next_number_field && + m_table->next_number_field->field_index >= m_width); + } +#endif + +private: + +#if defined(MYSQL_SERVER) && defined(HAVE_REPLICATION) + virtual int do_apply_event(rpl_group_info *rgi); + virtual int do_update_pos(rpl_group_info *rgi); + virtual enum_skip_reason do_shall_skip(rpl_group_info *rgi); + + /* + Primitive to prepare for a sequence of row executions. + + DESCRIPTION + + Before doing a sequence of do_prepare_row() and do_exec_row() + calls, this member function should be called to prepare for the + entire sequence. Typically, this member function will allocate + space for any buffers that are needed for the two member + functions mentioned above. + + RETURN VALUE + + The member function will return 0 if all went OK, or a non-zero + error code otherwise. + */ + virtual + int do_before_row_operations(const Slave_reporting_capability *const log) = 0; + + /* + Primitive to clean up after a sequence of row executions. + + DESCRIPTION + + After doing a sequence of do_prepare_row() and do_exec_row(), + this member function should be called to clean up and release + any allocated buffers. + + The error argument, if non-zero, indicates an error which happened during + row processing before this function was called. In this case, even if + function is successful, it should return the error code given in the argument. + */ + virtual + int do_after_row_operations(const Slave_reporting_capability *const log, + int error) = 0; + + /* + Primitive to do the actual execution necessary for a row. + + DESCRIPTION + The member function will do the actual execution needed to handle a row. + The row is located at m_curr_row. When the function returns, + m_curr_row_end should point at the next row (one byte after the end + of the current row). + + RETURN VALUE + 0 if execution succeeded, 1 if execution failed. + + */ + virtual int do_exec_row(rpl_group_info *rli) = 0; +#endif /* defined(MYSQL_SERVER) && defined(HAVE_REPLICATION) */ + + friend class Old_rows_log_event; +}; + +/** + @class Write_rows_log_event + + Log row insertions and updates. The event contain several + insert/update rows for a table. Note that each event contains only + rows for one table. + + @section Write_rows_log_event_binary_format Binary Format +*/ +class Write_rows_log_event : public Rows_log_event +{ +public: + enum + { + /* Support interface to THD::binlog_prepare_pending_rows_event */ + TYPE_CODE = WRITE_ROWS_EVENT + }; + +#if defined(MYSQL_SERVER) + Write_rows_log_event(THD*, TABLE*, ulong table_id, + bool is_transactional); +#endif +#ifdef HAVE_REPLICATION + Write_rows_log_event(const char *buf, uint event_len, + const Format_description_log_event *description_event); +#endif +#if defined(MYSQL_SERVER) + static bool binlog_row_logging_function(THD *thd, TABLE *table, + bool is_transactional, + const uchar *before_record + __attribute__((unused)), + const uchar *after_record) + { + DBUG_ASSERT(!table->versioned(VERS_TRX_ID)); + return thd->binlog_write_row(table, is_transactional, after_record); + } +#endif + +#if defined(MYSQL_SERVER) && defined(HAVE_REPLICATION) + uint8 get_trg_event_map(); +#endif + +private: + virtual Log_event_type get_general_type_code() { return (Log_event_type)TYPE_CODE; } + +#ifdef MYSQL_CLIENT + bool print(FILE *file, PRINT_EVENT_INFO *print_event_info); +#endif + +#if defined(MYSQL_SERVER) && defined(HAVE_REPLICATION) + virtual int do_before_row_operations(const Slave_reporting_capability *const); + virtual int do_after_row_operations(const Slave_reporting_capability *const,int); + virtual int do_exec_row(rpl_group_info *); +#endif +}; + +class Write_rows_compressed_log_event : public Write_rows_log_event +{ +public: +#if defined(MYSQL_SERVER) + Write_rows_compressed_log_event(THD*, TABLE*, ulong table_id, + bool is_transactional); + virtual bool write(); +#endif +#ifdef HAVE_REPLICATION + Write_rows_compressed_log_event(const char *buf, uint event_len, + const Format_description_log_event *description_event); +#endif +private: +#if defined(MYSQL_CLIENT) + bool print(FILE *file, PRINT_EVENT_INFO *print_event_info); +#endif +}; + +/** + @class Update_rows_log_event + + Log row updates with a before image. The event contain several + update rows for a table. Note that each event contains only rows for + one table. + + Also note that the row data consists of pairs of row data: one row + for the old data and one row for the new data. + + @section Update_rows_log_event_binary_format Binary Format +*/ +class Update_rows_log_event : public Rows_log_event +{ +public: + enum + { + /* Support interface to THD::binlog_prepare_pending_rows_event */ + TYPE_CODE = UPDATE_ROWS_EVENT + }; + +#ifdef MYSQL_SERVER + Update_rows_log_event(THD*, TABLE*, ulong table_id, + bool is_transactional); + + void init(MY_BITMAP const *cols); +#endif + + virtual ~Update_rows_log_event(); + +#ifdef HAVE_REPLICATION + Update_rows_log_event(const char *buf, uint event_len, + const Format_description_log_event *description_event); +#endif + +#ifdef MYSQL_SERVER + static bool binlog_row_logging_function(THD *thd, TABLE *table, + bool is_transactional, + const uchar *before_record, + const uchar *after_record) + { + DBUG_ASSERT(!table->versioned(VERS_TRX_ID)); + return thd->binlog_update_row(table, is_transactional, + before_record, after_record); + } +#endif + + virtual bool is_valid() const + { + return Rows_log_event::is_valid() && m_cols_ai.bitmap; + } + +#if defined(MYSQL_SERVER) && defined(HAVE_REPLICATION) + uint8 get_trg_event_map(); +#endif + +protected: + virtual Log_event_type get_general_type_code() { return (Log_event_type)TYPE_CODE; } + +#ifdef MYSQL_CLIENT + bool print(FILE *file, PRINT_EVENT_INFO *print_event_info); +#endif + +#if defined(MYSQL_SERVER) && defined(HAVE_REPLICATION) + virtual int do_before_row_operations(const Slave_reporting_capability *const); + virtual int do_after_row_operations(const Slave_reporting_capability *const,int); + virtual int do_exec_row(rpl_group_info *); +#endif /* defined(MYSQL_SERVER) && defined(HAVE_REPLICATION) */ +}; + +class Update_rows_compressed_log_event : public Update_rows_log_event +{ +public: +#if defined(MYSQL_SERVER) + Update_rows_compressed_log_event(THD*, TABLE*, ulong table_id, + bool is_transactional); + virtual bool write(); +#endif +#ifdef HAVE_REPLICATION + Update_rows_compressed_log_event(const char *buf, uint event_len, + const Format_description_log_event *description_event); +#endif +private: +#if defined(MYSQL_CLIENT) + bool print(FILE *file, PRINT_EVENT_INFO *print_event_info); +#endif +}; + +/** + @class Delete_rows_log_event + + Log row deletions. The event contain several delete rows for a + table. Note that each event contains only rows for one table. + + RESPONSIBILITIES + + - Act as a container for rows that has been deleted on the master + and should be deleted on the slave. + + COLLABORATION + + Row_writer + Create the event and add rows to the event. + Row_reader + Extract the rows from the event. + + @section Delete_rows_log_event_binary_format Binary Format +*/ +class Delete_rows_log_event : public Rows_log_event +{ +public: + enum + { + /* Support interface to THD::binlog_prepare_pending_rows_event */ + TYPE_CODE = DELETE_ROWS_EVENT + }; + +#ifdef MYSQL_SERVER + Delete_rows_log_event(THD*, TABLE*, ulong, bool is_transactional); +#endif +#ifdef HAVE_REPLICATION + Delete_rows_log_event(const char *buf, uint event_len, + const Format_description_log_event *description_event); +#endif +#ifdef MYSQL_SERVER + static bool binlog_row_logging_function(THD *thd, TABLE *table, + bool is_transactional, + const uchar *before_record, + const uchar *after_record + __attribute__((unused))) + { + DBUG_ASSERT(!table->versioned(VERS_TRX_ID)); + return thd->binlog_delete_row(table, is_transactional, + before_record); + } +#endif + +#if defined(MYSQL_SERVER) && defined(HAVE_REPLICATION) + uint8 get_trg_event_map(); +#endif + +protected: + virtual Log_event_type get_general_type_code() { return (Log_event_type)TYPE_CODE; } + +#ifdef MYSQL_CLIENT + bool print(FILE *file, PRINT_EVENT_INFO *print_event_info); +#endif + +#if defined(MYSQL_SERVER) && defined(HAVE_REPLICATION) + virtual int do_before_row_operations(const Slave_reporting_capability *const); + virtual int do_after_row_operations(const Slave_reporting_capability *const,int); + virtual int do_exec_row(rpl_group_info *); +#endif +}; + +class Delete_rows_compressed_log_event : public Delete_rows_log_event +{ +public: +#if defined(MYSQL_SERVER) + Delete_rows_compressed_log_event(THD*, TABLE*, ulong, bool is_transactional); + virtual bool write(); +#endif +#ifdef HAVE_REPLICATION + Delete_rows_compressed_log_event(const char *buf, uint event_len, + const Format_description_log_event *description_event); +#endif +private: +#if defined(MYSQL_CLIENT) + bool print(FILE *file, PRINT_EVENT_INFO *print_event_info); +#endif +}; + + +#include "log_event_old.h" + +/** + @class Incident_log_event + + Class representing an incident, an occurence out of the ordinary, + that happened on the master. + + The event is used to inform the slave that something out of the + ordinary happened on the master that might cause the database to be + in an inconsistent state. + + + + + + + + + + + + + + + + + + + + + + + +
Incident event format
SymbolFormatDescription
INCIDENT2Incident number as an unsigned integer
MSGLEN1Message length as an unsigned integer
MESSAGEMSGLENThe message, if present. Not null terminated.
+ + @section Delete_rows_log_event_binary_format Binary Format +*/ +class Incident_log_event : public Log_event { +public: +#ifdef MYSQL_SERVER + Incident_log_event(THD *thd_arg, Incident incident) + : Log_event(thd_arg, 0, FALSE), m_incident(incident) + { + DBUG_ENTER("Incident_log_event::Incident_log_event"); + DBUG_PRINT("enter", ("m_incident: %d", m_incident)); + m_message.str= NULL; /* Just as a precaution */ + m_message.length= 0; + set_direct_logging(); + /* Replicate the incident regardless of @@skip_replication. */ + flags&= ~LOG_EVENT_SKIP_REPLICATION_F; + DBUG_VOID_RETURN; + } + + Incident_log_event(THD *thd_arg, Incident incident, const LEX_CSTRING *msg) + : Log_event(thd_arg, 0, FALSE), m_incident(incident) + { + extern PSI_memory_key key_memory_Incident_log_event_message; + DBUG_ENTER("Incident_log_event::Incident_log_event"); + DBUG_PRINT("enter", ("m_incident: %d", m_incident)); + m_message.length= 0; + if (!(m_message.str= (char*) my_malloc(key_memory_Incident_log_event_message, + msg->length + 1, MYF(MY_WME)))) + { + /* Mark this event invalid */ + m_incident= INCIDENT_NONE; + DBUG_VOID_RETURN; + } + strmake(m_message.str, msg->str, msg->length); + m_message.length= msg->length; + set_direct_logging(); + /* Replicate the incident regardless of @@skip_replication. */ + flags&= ~LOG_EVENT_SKIP_REPLICATION_F; + DBUG_VOID_RETURN; + } +#endif + +#ifdef MYSQL_SERVER + void pack_info(Protocol*); + + virtual bool write_data_header(); + virtual bool write_data_body(); +#endif + + Incident_log_event(const char *buf, uint event_len, + const Format_description_log_event *descr_event); + + virtual ~Incident_log_event(); + +#ifdef MYSQL_CLIENT + virtual bool print(FILE *file, PRINT_EVENT_INFO *print_event_info); +#endif + +#if defined(MYSQL_SERVER) && defined(HAVE_REPLICATION) + virtual int do_apply_event(rpl_group_info *rgi); +#endif + + virtual Log_event_type get_type_code() { return INCIDENT_EVENT; } + + virtual bool is_valid() const + { + return m_incident > INCIDENT_NONE && m_incident < INCIDENT_COUNT; + } + virtual int get_data_size() { + return INCIDENT_HEADER_LEN + 1 + (uint) m_message.length; + } + +private: + const char *description() const; + + Incident m_incident; + LEX_STRING m_message; +}; + +/** + @class Ignorable_log_event + + Base class for ignorable log events. Events deriving from + this class can be safely ignored by slaves that cannot + recognize them. Newer slaves, will be able to read and + handle them. This has been designed to be an open-ended + architecture, so adding new derived events shall not harm + the old slaves that support ignorable log event mechanism + (they will just ignore unrecognized ignorable events). + + @note The only thing that makes an event ignorable is that it has + the LOG_EVENT_IGNORABLE_F flag set. It is not strictly necessary + that ignorable event types derive from Ignorable_log_event; they may + just as well derive from Log_event and pass LOG_EVENT_IGNORABLE_F as + argument to the Log_event constructor. +**/ + +class Ignorable_log_event : public Log_event { +public: + int number; + const char *description; + +#ifndef MYSQL_CLIENT + Ignorable_log_event(THD *thd_arg) + :Log_event(thd_arg, LOG_EVENT_IGNORABLE_F, FALSE), + number(0), description("internal") + { + DBUG_ENTER("Ignorable_log_event::Ignorable_log_event"); + DBUG_VOID_RETURN; + } +#endif + + Ignorable_log_event(const char *buf, + const Format_description_log_event *descr_event, + const char *event_name); + virtual ~Ignorable_log_event(); + +#ifndef MYSQL_CLIENT + void pack_info(Protocol*); +#endif + +#ifdef MYSQL_CLIENT + virtual bool print(FILE *file, PRINT_EVENT_INFO *print_event_info); +#endif + + virtual Log_event_type get_type_code() { return IGNORABLE_LOG_EVENT; } + + virtual bool is_valid() const { return 1; } + + virtual int get_data_size() { return IGNORABLE_HEADER_LEN; } +}; + +#ifdef MYSQL_CLIENT +bool copy_cache_to_string_wrapped(IO_CACHE *body, + LEX_STRING *to, + bool do_wrap, + const char *delimiter, + bool is_verbose); +bool copy_cache_to_file_wrapped(IO_CACHE *body, + FILE *file, + bool do_wrap, + const char *delimiter, + bool is_verbose); +#endif + +#ifdef MYSQL_SERVER +/***************************************************************************** + + Heartbeat Log Event class + + Replication event to ensure to slave that master is alive. + The event is originated by master's dump thread and sent straight to + slave without being logged. Slave itself does not store it in relay log + but rather uses a data for immediate checks and throws away the event. + + Two members of the class log_ident and Log_event::log_pos comprise + @see the event_coordinates instance. The coordinates that a heartbeat + instance carries correspond to the last event master has sent from + its binlog. + + ****************************************************************************/ +class Heartbeat_log_event: public Log_event +{ +public: + uint8 hb_flags; + Heartbeat_log_event(const char* buf, ulong event_len, + const Format_description_log_event* description_event); + Log_event_type get_type_code() { return HEARTBEAT_LOG_EVENT; } + bool is_valid() const + { + return (log_ident != NULL && ident_len <= FN_REFLEN-1 && + log_pos >= BIN_LOG_HEADER_SIZE); + } + const char * get_log_ident() { return log_ident; } + uint get_ident_len() { return ident_len; } + +private: + const char* log_ident; + uint ident_len; +}; + +inline int Log_event_writer::write(Log_event *ev) +{ + ev->writer= this; + int res= ev->write(); + IF_DBUG(ev->writer= 0,); // writer must be set before every Log_event::write + add_status(ev->logged_status()); + return res; +} + +/** + The function is called by slave applier in case there are + active table filtering rules to force gathering events associated + with Query-log-event into an array to execute + them once the fate of the Query is determined for execution. +*/ +bool slave_execute_deferred_events(THD *thd); +#endif + +bool event_that_should_be_ignored(const char *buf); +bool event_checksum_test(uchar *buf, ulong event_len, enum_binlog_checksum_alg alg); +enum enum_binlog_checksum_alg get_checksum_alg(const char* buf, ulong len); +extern TYPELIB binlog_checksum_typelib; +#ifdef WITH_WSREP +enum Log_event_type wsrep_peak_event(rpl_group_info *rgi, ulonglong* event_size); +#endif /* WITH_WSREP */ + +/** + @} (end of group Replication) +*/ + + +int binlog_buf_compress(const char *src, char *dst, uint32 len, uint32 *comlen); +int binlog_buf_uncompress(const char *src, char *dst, uint32 len, uint32 *newlen); +uint32 binlog_get_compress_len(uint32 len); +uint32 binlog_get_uncompress_len(const char *buf); + +int query_event_uncompress(const Format_description_log_event *description_event, bool contain_checksum, + const char *src, ulong src_len, char* buf, ulong buf_size, bool* is_malloc, + char **dst, ulong *newlen); + +int row_log_event_uncompress(const Format_description_log_event *description_event, bool contain_checksum, + const char *src, ulong src_len, char* buf, ulong buf_size, bool* is_malloc, + char **dst, ulong *newlen); + +#endif /* _log_event_h */ -- cgit v1.2.3