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用于EagleEye3.0 规则集漏报和误报测试的示例项目，项目收集于github和gitee
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test-example-projects/c++_projects/280w-mysql-8.0.18/sql/log_event.h

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/* Copyright (c) 2000, 2019, Oracle and/or its affiliates. All rights reserved.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License, version 2.0,
as published by the Free Software Foundation.
This program is also distributed with certain software (including
but not limited to OpenSSL) that is licensed under separate terms,
as designated in a particular file or component or in included license
documentation. The authors of MySQL hereby grant you an additional
permission to link the program and your derivative works with the
separately licensed software that they have included with MySQL.
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, version 2.0, 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 02110-1301 USA */
/**
@file sql/log_event.h
@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.
@addtogroup Replication
@{
*/
#ifndef _log_event_h
#define _log_event_h
#include <atomic>
#include <functional>
#include <list>
#include <map>
#include <set>
#include <string>
#include "lex_string.h"
#include "libbinlogevents/include/binlog_event.h"
#include "libbinlogevents/include/control_events.h"
#include "libbinlogevents/include/load_data_events.h"
#include "libbinlogevents/include/rows_event.h"
#include "libbinlogevents/include/statement_events.h"
#include "libbinlogevents/include/uuid.h"
#include "m_string.h" // native_strncasecmp
#include "my_bitmap.h" // MY_BITMAP
#include "my_dbug.h"
#include "my_inttypes.h"
#include "my_psi_config.h"
#include "my_sharedlib.h"
#include "my_sys.h"
#include "my_thread_local.h"
#include "mysql/components/services/psi_stage_bits.h"
#include "mysql/service_mysql_alloc.h"
#include "mysql/udf_registration_types.h"
#include "mysql_com.h" // SERVER_VERSION_LENGTH
#include "partition_info.h"
#include "sql/query_options.h" // OPTION_AUTO_IS_NULL
#include "sql/rpl_gtid.h" // enum_gtid_type
#include "sql/rpl_utility.h" // Hash_slave_rows
#include "sql/sql_const.h"
#include "sql/thr_malloc.h"
#include "sql_string.h"
#include "typelib.h" // TYPELIB
class THD;
class Table_id;
struct CHARSET_INFO;
enum class enum_row_image_type;
class Basic_ostream;
#ifdef MYSQL_SERVER
#include <stdio.h>
#include "my_compiler.h"
#include "sql/key.h"
#include "sql/rpl_filter.h" // rpl_filter
#include "sql/table.h"
#include "sql/xa.h"
#endif
#ifndef MYSQL_SERVER
#include "sql/rpl_tblmap.h" // table_mapping
#endif
#include <limits.h>
#include <stdint.h>
#include <string.h>
#include <sys/types.h>
#include <time.h>
#ifdef HAVE_PSI_STAGE_INTERFACE
#include "mysql/psi/mysql_stage.h"
#endif
#ifndef MYSQL_SERVER
class Format_description_log_event;
#endif
extern PSI_memory_key key_memory_Incident_log_event_message;
extern PSI_memory_key key_memory_Rows_query_log_event_rows_query;
extern "C" MYSQL_PLUGIN_IMPORT ulong server_id;
/* Forward declarations */
using binary_log::Binary_log_event;
using binary_log::checksum_crc32;
using binary_log::enum_binlog_checksum_alg;
using binary_log::Format_description_event;
using binary_log::Log_event_footer;
using binary_log::Log_event_header;
using binary_log::Log_event_type;
typedef ulonglong sql_mode_t;
struct db_worker_hash_entry;
extern "C" MYSQL_PLUGIN_IMPORT char server_version[SERVER_VERSION_LENGTH];
#if defined(MYSQL_SERVER)
int ignored_error_code(int err_code);
#endif
#define PREFIX_SQL_LOAD "SQL_LOAD-"
/**
Maximum length of the name of a temporary file
PREFIX LENGTH - 9
UUID - UUID_LENGTH
SEPARATORS - 2
SERVER ID - 10 (range of server ID 1 to (2^32)-1 = 4,294,967,295)
FILE ID - 10 (uint)
EXTENSION - 7 (Assuming that the extension is always less than 7
characters)
*/
#define TEMP_FILE_MAX_LEN UUID_LENGTH + 38
/**
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_EVENT_OFFSET 4
#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 MAX_LOG_EVENT_HEADER \
( /* in order of Query_log_event::write */ \
(LOG_EVENT_HEADER_LEN + /* write_header */ \
Binary_log_event::QUERY_HEADER_LEN + /* write_data */ \
Binary_log_event:: \
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
/* 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
/* Intvar event post-header */
/* Intvar event data */
#define I_TYPE_OFFSET 0
#define I_VAL_OFFSET 1
/* 4 bytes which all binlogs should begin with */
#define BINLOG_MAGIC "\xfe\x62\x69\x6e"
#define BINLOG_MAGIC_SIZE 4
/**
@addtogroup group_cs_binglog_event_header_flags Binlog Event Header Flags
@ingroup group_cs
@{
*/
/*
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.
#define LOG_EVENT_TIME_F 0x1
#define LOG_EVENT_FORCED_ROTATE_F 0x2
*/
/**
@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 arbitarily 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_NO_FILTER_F
Events with this flag are not filtered (e.g. on the current
database) and are always written to the binary log regardless of
filters.
*/
#define LOG_EVENT_NO_FILTER_F 0x100
/**
MTS: group of events can be marked to force its execution
in isolation from any other Workers.
So it's a marker for Coordinator to memorize and perform necessary
operations in order to guarantee no interference from other Workers.
The flag can be set ON only for an event that terminates its group.
Typically that is done for a transaction that contains
a query accessing more than OVER_MAX_DBS_IN_EVENT_MTS databases.
*/
#define LOG_EVENT_MTS_ISOLATE_F 0x200
/** @}*/
/**
@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)
/* Shouldn't be defined before */
#define EXPECTED_OPTIONS \
((1ULL << 14) | (1ULL << 26) | (1ULL << 27) | (1ULL << 19))
#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 */
/**
Maximum value of binlog logical timestamp.
*/
const int64 SEQ_MAX_TIMESTAMP = LLONG_MAX;
/**
This method is used to extract the partition_id
from a partitioned table.
@param part_info an object of class partition_info it will be used
to call the methods responsible for returning the
value of partition_id
@retval The return value is the partition_id.
*/
int get_rpl_part_id(partition_info *part_info);
#ifdef MYSQL_SERVER
class Item;
class Protocol;
class Slave_reporting_capability;
class Slave_worker;
class sql_exchange;
template <class T>
class List;
#endif
class Relay_log_info;
#ifndef MYSQL_SERVER
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
};
/*
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.
*/
struct 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.
*/
// TODO: have the last catalog here ??
char db[FN_REFLEN + 1]; // TODO: make this a LEX_STRING when thd->db is
bool flags2_inited;
uint32 flags2;
bool sql_mode_inited;
sql_mode_t sql_mode; /* must be same as THD.variables.sql_mode */
ulong auto_increment_increment, auto_increment_offset;
bool charset_inited;
char charset[6]; // 3 variables, each of them storable in 2 bytes
char time_zone_str[MAX_TIME_ZONE_NAME_LENGTH];
uint lc_time_names_number;
uint charset_database_number;
uint default_collation_for_utf8mb4_number;
uint8_t sql_require_primary_key;
my_thread_id thread_id;
bool thread_id_printed;
uint8_t default_table_encryption;
PRINT_EVENT_INFO();
~PRINT_EVENT_INFO() {
close_cached_file(&head_cache);
close_cached_file(&body_cache);
close_cached_file(&footer_cache);
}
bool init_ok() /* tells if construction was successful */
{
return my_b_inited(&head_cache) && my_b_inited(&body_cache) &&
my_b_inited(&footer_cache);
}
/* Settings on how to print the events */
// True if the --short-form flag was specified
bool short_form;
// The X in --base64-output=X
enum_base64_output_mode base64_output_mode;
// True if the --skip-gtids flag was specified.
bool skip_gtids;
/*
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;
my_off_t hexdump_from;
uint8 common_header_len;
char delimiter[16];
uint verbose;
table_mapping m_table_map;
table_mapping m_table_map_ignored;
/*
These three 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 and in footer section any verbose related details
or comments related to the statment.
*/
IO_CACHE head_cache;
IO_CACHE body_cache;
IO_CACHE footer_cache;
/* Indicate if the body cache has unflushed events */
bool have_unflushed_events;
/*
True if an event was skipped while printing the events of
a transaction and no COMMIT statement or XID event was ever
output (ie, was filtered out as well). This can be triggered
by the --database option of mysqlbinlog.
False, otherwise.
*/
bool skipped_event_in_transaction;
bool print_table_metadata;
};
#endif
/*
A specific to the database-scheduled MTS type.
*/
struct Mts_db_names {
const char *name[MAX_DBS_IN_EVENT_MTS];
int num;
};
/**
@class Log_event
This is the abstract base class for binary log events.
@section Log_event_binary_format Binary Format
The format of the event is described @ref Binary_log_event_format "here".
@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.
*/
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
};
protected:
enum enum_event_cache_type {
EVENT_INVALID_CACHE = 0,
/*
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 any cache.
*/
EVENT_NO_CACHE,
/*
If there is a need for different types, introduce them before this.
*/
EVENT_CACHE_COUNT
};
enum enum_event_logging_type {
EVENT_INVALID_LOGGING = 0,
/*
The event must be written to a cache and upon commit or rollback
written to the binary log.
*/
EVENT_NORMAL_LOGGING,
/*
The event must be written to an empty cache and immediatly written
to the binary log without waiting for any other event.
*/
EVENT_IMMEDIATE_LOGGING,
/*
If there is a need for different types, introduce them before this.
*/
EVENT_CACHE_LOGGING_COUNT
};
/**
Writes the common header of this event to the given memory buffer.
This does not update the checksum.
@note This has the following form:
+---------+---------+---------+------------+-----------+-------+
|timestamp|type code|server_id|event_length|end_log_pos|flags |
|4 bytes |1 byte |4 bytes |4 bytes |4 bytes |2 bytes|
+---------+---------+---------+------------+-----------+-------+
@param buf Memory buffer to write to. This must be at least
LOG_EVENT_HEADER_LEN bytes long.
@return The number of bytes written, i.e., always
LOG_EVENT_HEADER_LEN.
*/
uint32 write_header_to_memory(uchar *buf);
/**
Writes the common-header of this event to the given output stream and
updates the checksum.
@param ostream The event will be written to this output stream.
@param data_length The length of the post-header section plus the
length of the data section; i.e., the length of the event minus
the common-header and the checksum.
*/
bool write_header(Basic_ostream *ostream, size_t data_length);
bool write_footer(Basic_ostream *ostream);
bool need_checksum();
public:
/*
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;
/*
This variable determines whether the event is responsible for deallocating
the memory pointed by temp_buf. When set to true temp_buf is deallocated
and when it is set to false just make temp_buf point to NULL.
*/
bool m_free_temp_buf_in_destructor;
/* The number of seconds the query took to run on the master. */
ulong exec_time;
/*
The master's server id (is preserved in the relay log; used to
prevent from infinite loops in circular replication).
*/
uint32 server_id;
/**
A storage to cache the global system variable's value.
Handling of a separate event will be governed its member.
*/
ulong rbr_exec_mode;
/**
Defines the type of the cache, if any, where the event will be
stored before being flushed to disk.
*/
enum_event_cache_type event_cache_type;
/**
Defines when information, i.e. event or cache, will be flushed
to disk.
*/
enum_event_logging_type event_logging_type;
/**
Placeholder for event checksum while writing to binlog.
*/
ha_checksum crc;
/**
Index in @c rli->gaq array to indicate a group that this event is
purging. The index is set by Coordinator to a group terminator
event is checked by Worker at the event execution. The indexed
data represent the Worker progress status.
*/
ulong mts_group_idx;
/**
The Log_event_header class contains the variable present
in the common header
*/
binary_log::Log_event_header *common_header;
/**
The Log_event_footer class contains the variable present
in the common footer. Currently, footer contains only the checksum_alg.
*/
binary_log::Log_event_footer *common_footer;
/**
MTS: associating the event with either an assigned Worker or Coordinator.
Additionally the member serves to tag deferred (IRU) events to avoid
the event regular time destruction.
*/
Relay_log_info *worker;
/**
A copy of the main rli value stored into event to pass to MTS worker rli
*/
ulonglong future_event_relay_log_pos;
#ifdef MYSQL_SERVER
THD *thd;
/**
Partition info associate with event to deliver to MTS event applier
*/
db_worker_hash_entry *mts_assigned_partitions[MAX_DBS_IN_EVENT_MTS];
Log_event(Log_event_header *header, Log_event_footer *footer,
enum_event_cache_type cache_type_arg,
enum_event_logging_type logging_type_arg);
Log_event(THD *thd_arg, uint16 flags_arg,
enum_event_cache_type cache_type_arg,
enum_event_logging_type logging_type_arg, Log_event_header *header,
Log_event_footer *footer);
/*
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(List<Item> *field_list);
int net_send(Protocol *protocol, const char *log_name, my_off_t pos);
/**
Stores a string representation of this event in the Protocol.
This is used by SHOW BINLOG EVENTS.
@retval 0 success
@retval nonzero error
*/
virtual int pack_info(Protocol *protocol);
virtual const char *get_db();
#else // ifdef MYSQL_SERVER
/* print*() functions are used by mysqlbinlog */
virtual void print(FILE *file, PRINT_EVENT_INFO *print_event_info) const = 0;
void print_timestamp(IO_CACHE *file, time_t *ts) const;
void print_header(IO_CACHE *file, PRINT_EVENT_INFO *print_event_info,
bool is_more) const;
void print_base64(IO_CACHE *file, PRINT_EVENT_INFO *print_event_info,
bool is_more) const;
#endif // ifdef MYSQL_SERVER ... else
void *operator new(size_t size);
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 *) {}
/**
Write the given buffer to the given output stream, updating the
checksum if checksums are enabled.
@param ostream The output stream to write to.
@param buf The buffer to write.
@param data_length The number of bytes to write.
@retval false Success.
@retval true Error.
*/
bool wrapper_my_b_safe_write(Basic_ostream *ostream, const uchar *buf,
size_t data_length);
#ifdef MYSQL_SERVER
virtual bool write(Basic_ostream *ostream) {
return (write_header(ostream, get_data_size()) ||
write_data_header(ostream) || write_data_body(ostream) ||
write_footer(ostream));
}
time_t get_time();
virtual bool write_data_header(Basic_ostream *) { return 0; }
virtual bool write_data_body(Basic_ostream *) { return 0; }
#endif
Log_event_type get_type_code() const { return common_header->type_code; }
/**
Return true if the event has to be logged using SBR for DMLs.
*/
virtual bool is_sbr_logging_format() const { return false; }
/**
Return true if the event has to be logged using RBR for DMLs.
*/
virtual bool is_rbr_logging_format() const { return false; }
/*
is_valid is event specific sanity checks to determine that the
object is correctly initialized.
*/
bool is_valid();
void set_artificial_event() {
common_header->flags |= LOG_EVENT_ARTIFICIAL_F;
/*
Artificial events are automatically generated and do not exist
in master's binary log, so log_pos should be set to 0.
*/
common_header->log_pos = 0;
}
void set_relay_log_event() { common_header->flags |= LOG_EVENT_RELAY_LOG_F; }
bool is_artificial_event() const {
return common_header->flags & LOG_EVENT_ARTIFICIAL_F;
}
bool is_relay_log_event() const {
return common_header->flags & LOG_EVENT_RELAY_LOG_F;
}
bool is_ignorable_event() const {
return common_header->flags & LOG_EVENT_IGNORABLE_F;
}
bool is_no_filter_event() const {
return common_header->flags & LOG_EVENT_NO_FILTER_F;
}
inline bool is_using_trans_cache() const {
return (event_cache_type == EVENT_TRANSACTIONAL_CACHE);
}
inline bool is_using_stmt_cache() const {
return (event_cache_type == EVENT_STMT_CACHE);
}
inline bool is_using_immediate_logging() const {
return (event_logging_type == EVENT_IMMEDIATE_LOGGING);
}
/*
For the events being decoded in BAPI, common_header should
point to the header object which is contained within the class
Binary_log_event.
*/
Log_event(Log_event_header *header, Log_event_footer *footer);
virtual ~Log_event() { free_temp_buf(); }
void register_temp_buf(char *buf, bool free_in_destructor = true) {
m_free_temp_buf_in_destructor = free_in_destructor;
temp_buf = buf;
}
void free_temp_buf() {
if (temp_buf) {
if (m_free_temp_buf_in_destructor) my_free(temp_buf);
temp_buf = nullptr;
}
}
/*
Get event length for simple events. For complicated events the length
is calculated during write()
*/
virtual size_t get_data_size() { return 0; }
/**
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() const;
/* Return start of query time or current time */
#if defined(MYSQL_SERVER)
/**
Is called from get_mts_execution_mode() to
@return true if the event needs applying with synchronization
agaist Workers, otherwise
false
@note There are incompatile combinations such as referred further events
are wrapped with BEGIN/COMMIT. Such cases should be identified
by the caller and treats correspondingly.
todo: to mts-support Old master Load-data related events
*/
bool is_mts_sequential_exec() {
switch (get_type_code()) {
case binary_log::STOP_EVENT:
case binary_log::ROTATE_EVENT:
case binary_log::SLAVE_EVENT:
case binary_log::FORMAT_DESCRIPTION_EVENT:
case binary_log::INCIDENT_EVENT:
return true;
default:
return false;
}
}
private:
/*
possible decisions by get_mts_execution_mode().
The execution mode can be PARALLEL or not (thereby sequential
unless impossible at all). When it's sequential it further breaks into
ASYNChronous and SYNChronous.
*/
enum enum_mts_event_exec_mode {
/*
Event is run by a Worker.
*/
EVENT_EXEC_PARALLEL,
/*
Event is run by Coordinator.
*/
EVENT_EXEC_ASYNC,
/*
Event is run by Coordinator and requires synchronization with Workers.
*/
EVENT_EXEC_SYNC,
/*
Event can't be executed neither by Workers nor Coordinator.
*/
EVENT_EXEC_CAN_NOT
};
/**
MTS Coordinator finds out a way how to execute the current event.
Besides the parallelizable case, some events have to be applied by
Coordinator concurrently with Workers and some to require synchronization
with Workers (@c see wait_for_workers_to_finish) before to apply them.
@param mts_in_group the being group parsing status, true
means inside the group
@retval EVENT_EXEC_PARALLEL if event is executed by a Worker
@retval EVENT_EXEC_ASYNC if event is executed by Coordinator
@retval EVENT_EXEC_SYNC if event is executed by Coordinator
with synchronization against the Workers
*/
enum enum_mts_event_exec_mode get_mts_execution_mode(bool mts_in_group) {
/*
Slave workers are unable to handle Format_description_log_event,
Rotate_log_event and Previous_gtids_log_event correctly.
However, when a transaction spans multiple relay logs, these
events occur in the middle of a transaction. The way we handle
this is by marking the events as 'ASYNC', meaning that the
coordinator thread will handle the events without stopping the
worker threads.
@todo Refactor this: make Log_event::get_slave_worker handle
transaction boundaries in a more robust way, so that it is able
to process Format_description_log_event, Rotate_log_event, and
Previous_gtids_log_event. Then, when these events occur in the
middle of a transaction, make them part of the transaction so
that the worker that handles the transaction handles these
events too. /Sven
*/
if (
/*
When a Format_description_log_event occurs in the middle of
a transaction, it either has the slave's server_id, or has
end_log_pos==0.
@todo This does not work when master and slave have the same
server_id and replicate-same-server-id is enabled, since
events that are not in the middle of a transaction will be
executed in ASYNC mode in that case.
*/
(get_type_code() == binary_log::FORMAT_DESCRIPTION_EVENT &&
((server_id == (uint32)::server_id) ||
(common_header->log_pos == 0))) ||
/*
All Previous_gtids_log_events in the relay log are generated
by the slave. They don't have any meaning to the applier, so
they can always be ignored by the applier. So we can process
them asynchronously by the coordinator. It is also important
to not feed them to workers because that confuses
get_slave_worker.
*/
(get_type_code() == binary_log::PREVIOUS_GTIDS_LOG_EVENT) ||
/*
Rotate_log_event can occur in the middle of a transaction.
When this happens, either it is a Rotate event generated on
the slave which has the slave's server_id, or it is a Rotate
event that originates from a master but has end_log_pos==0.
*/
(get_type_code() == binary_log::ROTATE_EVENT &&
((server_id == (uint32)::server_id) ||
(common_header->log_pos == 0 && mts_in_group))))
return EVENT_EXEC_ASYNC;
else if (is_mts_sequential_exec())
return EVENT_EXEC_SYNC;
else
return EVENT_EXEC_PARALLEL;
}
/**
@return index in [0, M] range to indicate
to be assigned worker;
M is the max index of the worker pool.
*/
Slave_worker *get_slave_worker(Relay_log_info *rli);
/*
Group of events can be marked to force its execution
in isolation from any other Workers.
Typically that is done for a transaction that contains
a query accessing more than OVER_MAX_DBS_IN_EVENT_MTS databases.
Factually that's a sequential mode where a Worker remains to
be the applier.
*/
virtual void set_mts_isolate_group() {
DBUG_ASSERT(ends_group() || get_type_code() == binary_log::QUERY_EVENT ||
get_type_code() == binary_log::EXECUTE_LOAD_QUERY_EVENT);
common_header->flags |= LOG_EVENT_MTS_ISOLATE_F;
}
public:
/**
The method fills in pointers to event's database name c-strings
to a supplied array.
In other than Query-log-event case the returned array contains
just one item.
@param[out] arg pointer to a struct containing char* array
pointers to be filled in and the number
of filled instances.
@param rpl_filter pointer to a replication filter.
@return number of the filled intances indicating how many
databases the event accesses.
*/
virtual uint8 get_mts_dbs(Mts_db_names *arg,
Rpl_filter *rpl_filter MY_ATTRIBUTE((unused))) {
arg->name[0] = get_db();
return arg->num = mts_number_dbs();
}
/**
@return true if events carries partitioning data (database names).
*/
bool contains_partition_info(bool);
/*
@return the number of updated by the event databases.
@note In other than Query-log-event case that's one.
*/
virtual uint8 mts_number_dbs() { return 1; }
/**
@return true if the terminal event of a group is marked to
execute in isolation from other Workers,
false otherwise
*/
bool is_mts_group_isolated() {
return common_header->flags & LOG_EVENT_MTS_ISOLATE_F;
}
/**
Events of a certain type can start or end a group of events treated
transactionally wrt binlog.
Public access is required by implementation of recovery + skip.
@return true if the event starts a group (transaction)
false otherwise
*/
#endif
virtual bool starts_group() const { return false; }
/**
@return true if the event ends a group (transaction)
false otherwise
*/
virtual bool ends_group() const { return false; }
#ifdef MYSQL_SERVER
/**
Apply the event to the database.
This function represents the public interface for applying an
event.
@see do_apply_event
*/
int apply_event(Relay_log_info *rli);
/**
Apply the GTID event in curr_group_data to the database.
@param rli Pointer to coordinato's relay log info.
@retval 0 success
@retval 1 error
*/
inline int apply_gtid_event(Relay_log_info *rli);
/**
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(Relay_log_info *rli) { return do_update_pos(rli); }
/**
Decide if the event shall be skipped, and the reason for skipping
it.
@see do_shall_skip
*/
enum_skip_reason shall_skip(Relay_log_info *rli) {
DBUG_TRACE;
enum_skip_reason ret = do_shall_skip(rli);
DBUG_PRINT("info", ("skip reason=%d=%s", ret,
ret == EVENT_SKIP_NOT
? "NOT"
: ret == EVENT_SKIP_IGNORE ? "IGNORE" : "COUNT"));
return ret;
}
/**
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(Relay_log_info const *rli MY_ATTRIBUTE((unused))) {
return 0; /* Default implementation does nothing */
}
virtual int do_apply_event_worker(Slave_worker *w);
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(Relay_log_info *rli) {
return continue_group(rli);
}
@endcode
@return Skip reason
*/
enum_skip_reason continue_group(Relay_log_info *rli);
/**
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 <em>if the event is last in a group</em>
@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(Relay_log_info *rli);
/**
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 <code>rli->replicate_same_server_id</code> is true,
or
- if <code>rli->slave_skip_counter</code> 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(Relay_log_info *rli);
#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.
*/
/**
A Query event is written to the binary log whenever the database is
modified on the master, unless row based logging is used.
Query_log_event is created for logging, and is called after an update to the
database is done. It is used when the server acts as the master.
Virtual inheritance is required here to handle the diamond problem in
the class @c Execute_load_query_log_event.
The diamond structure is explained in @c Excecute_load_query_log_event
@internal
The inheritance structure is as follows:
Binary_log_event
^
|
|
Query_event Log_event
\ /
<<virtual>>\ /
\ /
Query_log_event
@endinternal
*/
class Query_log_event : public virtual binary_log::Query_event,
public Log_event {
protected:
Log_event_header::Byte *data_buf;
public:
/*
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).
*/
my_thread_id slave_proxy_id;
/**
True if this is a ROLLBACK event injected by the mts coordinator to finish a
group corresponding to a partial transaction in the relay log.
False otherwise and by default, as it must be explicitly set to true by the
coordinator.
*/
bool rollback_injected_by_coord = false;
/**
The flag indicates whether the DDL query has been (already)
committed or not. It's initialized as OFF at the event instantiation,
flips ON when the DDL transaction has been committed with
all its possible extra statement due to replication or GTID.
The flag status is also checked in few places to catch uncommitted
transactions which can normally happen due to filtering out. In
such a case the commit is deferred to @c Log_event::do_update_pos().
*/
bool has_ddl_committed;
#ifdef MYSQL_SERVER
Query_log_event(THD *thd_arg, const char *query_arg, size_t query_length,
bool using_trans, bool immediate, bool suppress_use,
int error, bool ignore_command = false);
const char *get_db() override { return db; }
/**
@param[out] arg pointer to a struct containing char* array
pointers be filled in and the number of
filled instances.
In case the number exceeds MAX_DBS_IN_EVENT_MTS,
the overfill is indicated with assigning the number to
OVER_MAX_DBS_IN_EVENT_MTS.
@param rpl_filter pointer to a replication filter.
@return number of databases in the array or OVER_MAX_DBS_IN_EVENT_MTS.
*/
virtual uint8 get_mts_dbs(Mts_db_names *arg,
Rpl_filter *rpl_filter) override {
if (mts_accessed_dbs == OVER_MAX_DBS_IN_EVENT_MTS) {
// the empty string db name is special to indicate sequential applying
mts_accessed_db_names[0][0] = 0;
} else {
for (uchar i = 0; i < mts_accessed_dbs; i++) {
const char *db_name = mts_accessed_db_names[i];
// Only default database is rewritten.
if (!rpl_filter->is_rewrite_empty() && !strcmp(get_db(), db_name)) {
size_t dummy_len;
const char *db_filtered =
rpl_filter->get_rewrite_db(db_name, &dummy_len);
// db_name != db_filtered means that db_name is rewritten.
if (strcmp(db_name, db_filtered)) db_name = db_filtered;
}
arg->name[i] = db_name;
}
}
return arg->num = mts_accessed_dbs;
}
void attach_temp_tables_worker(THD *, const Relay_log_info *);
void detach_temp_tables_worker(THD *, const Relay_log_info *);
virtual uchar mts_number_dbs() override { return mts_accessed_dbs; }
int pack_info(Protocol *protocol) override;
#else
void print_query_header(IO_CACHE *file,
PRINT_EVENT_INFO *print_event_info) const;
void print(FILE *file, PRINT_EVENT_INFO *print_event_info) const override;
static bool rewrite_db_in_buffer(char **buf, ulong *event_len,
const Format_description_event &fde);
#endif
Query_log_event();
Query_log_event(const char *buf,
const Format_description_event *description_event,
Log_event_type event_type);
~Query_log_event() override {
if (data_buf) my_free(data_buf);
}
#ifdef MYSQL_SERVER
bool write(Basic_ostream *ostream) override;
virtual bool write_post_header_for_derived(Basic_ostream *) { return false; }
#endif
/*
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)
virtual enum_skip_reason do_shall_skip(Relay_log_info *rli) override;
virtual int do_apply_event(Relay_log_info const *rli) override;
virtual int do_update_pos(Relay_log_info *rli) override;
int do_apply_event(Relay_log_info const *rli, const char *query_arg,
size_t q_len_arg);
#endif /* MYSQL_SERVER */
/*
If true, the event always be applied by slave SQL thread or be printed by
mysqlbinlog
*/
bool is_trans_keyword() const {
/*
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) ||
!native_strncasecmp(query, "SAVEPOINT", 9) ||
!native_strncasecmp(query, "ROLLBACK", 8) ||
!native_strncasecmp(query, STRING_WITH_LEN("XA START")) ||
!native_strncasecmp(query, STRING_WITH_LEN("XA END")) ||
!native_strncasecmp(query, STRING_WITH_LEN("XA PREPARE")) ||
!native_strncasecmp(query, STRING_WITH_LEN("XA COMMIT")) ||
!native_strncasecmp(query, STRING_WITH_LEN("XA ROLLBACK"));
}
/**
When a query log event contains a non-transaction control statement, we
assume that it is changing database content (DML) and was logged using
binlog_format=statement.
@return True the event represents a statement that was logged using SBR
that can change database content.
False for transaction control statements.
*/
bool is_sbr_logging_format() const override { return !is_trans_keyword(); }
/**
Notice, DDL queries are logged without BEGIN/COMMIT parentheses
and identification of such single-query group
occures within logics of @c get_slave_worker().
*/
bool starts_group() const override {
return !strncmp(query, "BEGIN", q_len) ||
!strncmp(query, STRING_WITH_LEN("XA START"));
}
virtual bool ends_group() const override {
return !strncmp(query, "COMMIT", q_len) ||
(!native_strncasecmp(query, STRING_WITH_LEN("ROLLBACK")) &&
native_strncasecmp(query, STRING_WITH_LEN("ROLLBACK TO "))) ||
!strncmp(query, STRING_WITH_LEN("XA ROLLBACK"));
}
static size_t get_query(const char *buf, size_t length,
const Format_description_event *fd_event,
const char **query_arg);
bool is_query_prefix_match(const char *pattern, uint p_len) {
return !strncmp(query, pattern, p_len);
}
private:
/** Whether or not the statement represented by this event requires
`Q_SQL_REQUIRE_PRIMARY_KEY` to be logged along aside. */
bool need_sql_require_primary_key{false};
/** Whether or not the statement represented by this event requires
`Q_DEFAULT_TABLE_ENCRYPTION` to be logged along aside. */
bool needs_default_table_encryption{false};
};
/**
@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).
This is the subclass of Format_description_event
@internal
The inheritance structure in the current design for the classes is
as follows:
Binary_log_event
^
|
|
Format_description_event Log_event
\ /
\ /
\ /
Format_description_log_event
@endinternal
@section Format_description_log_event_binary_format Binary Format
*/
class Format_description_log_event : public Format_description_event,
public Log_event {
public:
/*
MTS Workers and Coordinator share the event and that affects its
destruction. Instantiation is always done by Coordinator/SQL thread.
Workers are allowed to destroy only "obsolete" instances, those
that are not actual for Coordinator anymore but needed to Workers
that are processing queued events depending on the old instance.
The counter of a new FD is incremented by Coordinator or Worker at
time of {Relay_log_info,Slave_worker}::set_rli_description_event()
execution.
In the same methods the counter of the "old" FD event is decremented
and when it drops to zero the old FD is deleted.
The latest read from relay-log event is to be
destroyed by Coordinator/SQL thread at its thread exit.
Notice the counter is processed even in the single-thread mode where
decrement and increment are done by the single SQL thread.
*/
std::atomic<int32> atomic_usage_counter{0};
Format_description_log_event();
Format_description_log_event(
const char *buf, const Format_description_event *description_event);
#ifdef MYSQL_SERVER
bool write(Basic_ostream *ostream) override;
int pack_info(Protocol *protocol) override;
#else
void print(FILE *file, PRINT_EVENT_INFO *print_event_info) const override;
#endif
size_t get_data_size() override {
/*
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 Binary_log_event::FORMAT_DESCRIPTION_HEADER_LEN;
}
protected:
#if defined(MYSQL_SERVER)
virtual int do_apply_event(Relay_log_info const *rli) override;
virtual int do_update_pos(Relay_log_info *rli) override;
virtual enum_skip_reason do_shall_skip(Relay_log_info *rli) override;
#endif
};
/**
@class Intvar_log_event
The class derives from the class Intvar_event in Binlog API,
defined in the header binlog_event.h. An Intvar_log_event is
created just before a Query_log_event, if the query uses one
of the variables LAST_INSERT_ID or INSERT_ID. This class is used
by the slave for applying the event.
@internal
The inheritance structure in the current design for the classes is
as follows:
Binary_log_event
^
|
|
Intvar_event Log_event
\ /
\ /
\ /
Intvar_log_event
@endinternal
*/
class Intvar_log_event : public binary_log::Intvar_event, public Log_event {
public:
#ifdef MYSQL_SERVER
Intvar_log_event(THD *thd_arg, uchar type_arg, ulonglong val_arg,
enum_event_cache_type cache_type_arg,
enum_event_logging_type logging_type_arg)
: binary_log::Intvar_event(type_arg, val_arg),
Log_event(thd_arg, 0, cache_type_arg, logging_type_arg, header(),
footer()) {
common_header->set_is_valid(true);
}
int pack_info(Protocol *protocol) override;
#else
void print(FILE *file, PRINT_EVENT_INFO *print_event_info) const override;
#endif
Intvar_log_event(const char *buf,
const Format_description_event *description_event);
~Intvar_log_event() override {}
size_t get_data_size() override {
return 9; /* sizeof(type) + sizeof(val) */
;
}
#ifdef MYSQL_SERVER
bool write(Basic_ostream *ostream) override;
#endif
bool is_sbr_logging_format() const override { return true; }
private:
#if defined(MYSQL_SERVER)
virtual int do_apply_event(Relay_log_info const *rli) override;
virtual int do_update_pos(Relay_log_info *rli) override;
virtual enum_skip_reason do_shall_skip(Relay_log_info *rli) override;
#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.
@internal
The inheritance structure in the current design for the classes is
as follows:
Binary_log_event
^
|
|
Rand_event Log_event
\ /
\ /
\ /
Rand_log_event
@endinternal
*/
class Rand_log_event : public binary_log::Rand_event, public Log_event {
public:
#ifdef MYSQL_SERVER
Rand_log_event(THD *thd_arg, ulonglong seed1_arg, ulonglong seed2_arg,
enum_event_cache_type cache_type_arg,
enum_event_logging_type logging_type_arg)
: binary_log::Rand_event(seed1_arg, seed2_arg),
Log_event(thd_arg, 0, cache_type_arg, logging_type_arg, header(),
footer()) {
common_header->set_is_valid(true);
}
int pack_info(Protocol *protocol) override;
#else
void print(FILE *file, PRINT_EVENT_INFO *print_event_info) const override;
#endif
Rand_log_event(const char *buf,
const Format_description_event *description_event);
~Rand_log_event() override {}
size_t get_data_size() override { return 16; /* sizeof(ulonglong) * 2*/ }
#ifdef MYSQL_SERVER
bool write(Basic_ostream *ostream) override;
#endif
bool is_sbr_logging_format() const override { return true; }
private:
#if defined(MYSQL_SERVER)
virtual int do_apply_event(Relay_log_info const *rli) override;
virtual int do_update_pos(Relay_log_info *rli) override;
virtual enum_skip_reason do_shall_skip(Relay_log_info *rli) override;
#endif
};
/**
@class Xid_log_event
This is the subclass of Xid_event defined in libbinlogevent,
An XID event is generated for a commit of a transaction that modifies one or
more tables of an XA-capable storage engine
Logs xid of the transaction-to-be-committed in the 2pc protocol.
Has no meaning in replication, slaves ignore it
The inheritance structure in the current design for the classes is
as follows
@internal
The inheritance structure in the current design for the classes is
as follows:
Binary_log_event
^
|
|
Xid_event Log_event
\ /
\ /
\ /
Xid_log_event
@endinternal
*/
#ifndef MYSQL_SERVER
typedef ulonglong my_xid; // this line is the same as in handler.h
#endif
class Xid_apply_log_event : public Log_event {
protected:
#ifdef MYSQL_SERVER
Xid_apply_log_event(THD *thd_arg, Log_event_header *header_arg,
Log_event_footer *footer_arg)
: Log_event(thd_arg, 0, Log_event::EVENT_TRANSACTIONAL_CACHE,
Log_event::EVENT_NORMAL_LOGGING, header_arg, footer_arg) {}
#endif
Xid_apply_log_event(Log_event_header *header_arg,
Log_event_footer *footer_arg)
: Log_event(header_arg, footer_arg) {}
~Xid_apply_log_event() override {}
virtual bool ends_group() const override { return true; }
#if defined(MYSQL_SERVER)
virtual enum_skip_reason do_shall_skip(Relay_log_info *rli) override;
virtual int do_apply_event(Relay_log_info const *rli) override;
virtual int do_apply_event_worker(Slave_worker *rli) override;
virtual bool do_commit(THD *thd_arg) = 0;
#endif
};
class Xid_log_event : public binary_log::Xid_event, public Xid_apply_log_event {
public:
#ifdef MYSQL_SERVER
Xid_log_event(THD *thd_arg, my_xid x)
: binary_log::Xid_event(x),
Xid_apply_log_event(thd_arg, header(), footer()) {
common_header->set_is_valid(true);
}
int pack_info(Protocol *protocol) override;
#else
void print(FILE *file, PRINT_EVENT_INFO *print_event_info) const override;
#endif
Xid_log_event(const char *buf,
const Format_description_event *description_event);
~Xid_log_event() override {}
size_t get_data_size() override { return sizeof(xid); }
#ifdef MYSQL_SERVER
bool write(Basic_ostream *ostream) override;
#endif
private:
#if defined(MYSQL_SERVER)
bool do_commit(THD *thd_arg) override;
#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.
From the groupping perspective the event finalizes the current "prepare" group
started with XA START Query-log-event.
When @c one_phase is false Commit of Rollback for XA transaction are
logged separately to the prepare-group events so being a groups of
their own.
*/
class XA_prepare_log_event : public binary_log::XA_prepare_event,
public Xid_apply_log_event {
private:
/* Total size of buffers to hold serialized members of XID struct */
static const int xid_bufs_size = 12;
public:
#ifdef MYSQL_SERVER
XA_prepare_log_event(THD *thd_arg, XID *xid_arg, bool one_phase_arg = false)
: binary_log::XA_prepare_event((void *)xid_arg, one_phase_arg),
Xid_apply_log_event(thd_arg, header(), footer()) {}
#endif
XA_prepare_log_event(const char *buf,
const Format_description_event *description_event)
: binary_log::XA_prepare_event(buf, description_event),
Xid_apply_log_event(header(), footer()) {
DBUG_TRACE;
xid = nullptr;
return;
}
Log_event_type get_type_code() { return binary_log::XA_PREPARE_LOG_EVENT; }
size_t get_data_size() override {
return xid_bufs_size + my_xid.gtrid_length + my_xid.bqual_length;
}
#ifdef MYSQL_SERVER
bool write(Basic_ostream *ostream) override;
#else
void print(FILE *file, PRINT_EVENT_INFO *print_event_info) const override;
#endif
#if defined(MYSQL_SERVER)
int pack_info(Protocol *protocol) override;
bool do_commit(THD *thd) override;
#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.
@internal
The inheritance structure in the current design for the classes is
as follows:
Binary_log_event
^
|
|
User_var_event Log_event
\ /
\ /
\ /
User_var_log_event
@endinternal
*/
class User_var_log_event : public binary_log::User_var_event, public Log_event {
public:
#ifdef MYSQL_SERVER
bool deferred;
query_id_t query_id;
User_var_log_event(THD *thd_arg, const char *name_arg, uint name_len_arg,
char *val_arg, ulong val_len_arg, Item_result type_arg,
uint charset_number_arg, uchar flags_arg,
enum_event_cache_type cache_type_arg,
enum_event_logging_type logging_type_arg)
: binary_log::User_var_event(name_arg, name_len_arg, val_arg, val_len_arg,
type_arg, charset_number_arg, flags_arg),
Log_event(thd_arg, 0, cache_type_arg, logging_type_arg, header(),
footer()),
deferred(false) {
common_header->set_is_valid(name != 0);
}
int pack_info(Protocol *protocol) override;
#else
void print(FILE *file, PRINT_EVENT_INFO *print_event_info) const override;
#endif
User_var_log_event(const char *buf,
const Format_description_event *description_event);
~User_var_log_event() override {}
#ifdef MYSQL_SERVER
bool write(Basic_ostream *ostream) override;
/*
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 deffered 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_sbr_logging_format() const override { return true; }
private:
#if defined(MYSQL_SERVER)
virtual int do_apply_event(Relay_log_info const *rli) override;
virtual int do_update_pos(Relay_log_info *rli) override;
virtual enum_skip_reason do_shall_skip(Relay_log_info *rli) override;
#endif
};
/**
@class Stop_log_event
*/
class Stop_log_event : public binary_log::Stop_event, public Log_event {
public:
#ifdef MYSQL_SERVER
Stop_log_event()
: Log_event(header(), footer(), Log_event::EVENT_INVALID_CACHE,
Log_event::EVENT_INVALID_LOGGING) {
common_header->set_is_valid(true);
}
#else
void print(FILE *file, PRINT_EVENT_INFO *print_event_info) const override;
#endif
Stop_log_event(const char *buf,
const Format_description_event *description_event)
: binary_log::Stop_event(buf, description_event),
Log_event(header(), footer()) {
DBUG_TRACE;
return;
}
~Stop_log_event() override {}
Log_event_type get_type_code() { return binary_log::STOP_EVENT; }
private:
#if defined(MYSQL_SERVER)
virtual int do_update_pos(Relay_log_info *rli) override;
virtual enum_skip_reason do_shall_skip(Relay_log_info *) override {
/*
Events from ourself should be skipped, but they should not
decrease the slave skip counter.
*/
if (this->server_id == ::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.
This class is a subclass of Rotate_event, defined in binlogevent, and is used
by the slave for updating the position in the relay log.
It is used by the master inorder to write the rotate event in the binary log.
@internal
The inheritance structure in the current design for the classes is
as follows:
Binary_log_event
^
|
|
Rotate_event Log_event
\ /
\ /
\ /
Rotate_log_event
@endinternal
*/
class Rotate_log_event : public binary_log::Rotate_event, public Log_event {
public:
#ifdef MYSQL_SERVER
Rotate_log_event(const char *new_log_ident_arg, size_t ident_len_arg,
ulonglong pos_arg, uint flags);
int pack_info(Protocol *protocol) override;
#else
void print(FILE *file, PRINT_EVENT_INFO *print_event_info) const override;
#endif
Rotate_log_event(const char *buf,
const Format_description_event *description_event);
~Rotate_log_event() override {}
size_t get_data_size() override {
return ident_len + Binary_log_event::ROTATE_HEADER_LEN;
}
#ifdef MYSQL_SERVER
bool write(Basic_ostream *ostream) override;
#endif
private:
#if defined(MYSQL_SERVER)
virtual int do_update_pos(Relay_log_info *rli) override;
virtual enum_skip_reason do_shall_skip(Relay_log_info *rli) override;
#endif
};
/**
@class Append_block_log_event
This event is created to contain the file data. One LOAD_DATA_INFILE
can have 0 or more instances of this event written to the binary log
depending on the size of the file.
@internal
The inheritance structure is as follows
Binary_log_event
^
|
|
B_l:A_B_E Log_event
\ /
\ /
<<vir>>\ /
\ /
Append_block_log_event
B_l: Namespace Binary_log
A_B_E: class Append_block_event
@endinternal
*/
class Append_block_log_event : public virtual binary_log::Append_block_event,
public Log_event {
public:
#ifdef MYSQL_SERVER
Append_block_log_event(THD *thd, const char *db_arg, uchar *block_arg,
uint block_len_arg, bool using_trans);
int pack_info(Protocol *protocol) override;
virtual int get_create_or_append() const;
#else
void print(FILE *file, PRINT_EVENT_INFO *print_event_info) const override;
#endif
Append_block_log_event(const char *buf,
const Format_description_event *description_event);
~Append_block_log_event() override {}
size_t get_data_size() override {
return block_len + Binary_log_event::APPEND_BLOCK_HEADER_LEN;
}
#ifdef MYSQL_SERVER
bool write(Basic_ostream *ostream) override;
const char *get_db() override { return db; }
#endif
bool is_sbr_logging_format() const override { return true; }
private:
#if defined(MYSQL_SERVER)
virtual int do_apply_event(Relay_log_info const *rli) override;
#endif
};
/**
@class Delete_file_log_event
Delete_file_log_event is created when the LOAD_DATA query fails on the
master for some reason, and the slave should be notified to abort the
load. The event is required since the master starts writing the loaded
block into the binary log before the statement ends. In case of error,
the slave should abort, and delete any temporary file created while
applying the (NEW_)LOAD_EVENT.
@internal
The inheritance structure is as follows
Binary_log_event
^
|
|
B_l:D_F_E Log_event
\ /
\ /
\ /
\ /
Delete_file_log_event
B_l: Namespace Binary_log
D_F_E: class Delete_file_event
@endinternal
*/
class Delete_file_log_event : public binary_log::Delete_file_event,
public Log_event {
public:
#ifdef MYSQL_SERVER
Delete_file_log_event(THD *thd, const char *db_arg, bool using_trans);
int pack_info(Protocol *protocol) override;
#else
void print(FILE *file, PRINT_EVENT_INFO *print_event_info) const override;
void print(FILE *file, PRINT_EVENT_INFO *print_event_info, bool enable_local);
#endif
Delete_file_log_event(const char *buf,
const Format_description_event *description_event);
~Delete_file_log_event() override {}
size_t get_data_size() override {
return Binary_log_event::DELETE_FILE_HEADER_LEN;
}
#ifdef MYSQL_SERVER
bool write(Basic_ostream *ostream) override;
const char *get_db() override { return db; }
#endif
bool is_sbr_logging_format() const override { return true; }
private:
#if defined(MYSQL_SERVER)
virtual int do_apply_event(Relay_log_info const *rli) override;
#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.
@internal
The inheritance structure is as follows
Binary_log_event
^
|
|
|
Log_event B_l:A_B_E
^ /\
| / \
| <<vir>>/ \ <<vir>>
| / \
| / \
| / \
Append_block_log_event B_l:B_L_Q_E
\ /
\ /
\ /
\ /
\ /
Begin_load_query_log_event
B_l: Namespace Binary_log
A_B_E: class Append_block_event
B_L_Q_E: Begin_load_query_event
@endinternal
@section Begin_load_query_log_event_binary_format Binary Format
*/
class Begin_load_query_log_event : public Append_block_log_event,
public binary_log::Begin_load_query_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);
Begin_load_query_log_event(THD *thd);
int get_create_or_append() const override;
#endif
Begin_load_query_log_event(const char *buf,
const Format_description_event *description_event);
~Begin_load_query_log_event() override {}
private:
#if defined(MYSQL_SERVER)
virtual enum_skip_reason do_shall_skip(Relay_log_info *rli) override;
#endif
};
/**
@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.
@internal
The inheritance structure is as follows:
Binary_log_event
^
|
|
|
Log_event B_l:Query_event
^ /\
| / \
| <<vir>>/ \ <<vir>>
| / \
| / \
| / \
Query_log_event B_l:E_L_Q_E
\ /
\ /
\ /
\ /
\ /
Execute_load_query_log_event
B_l: Namespace Binary_log
E_L_Q_E: class Execute_load_query
@endinternal
@section Execute_load_query_log_event_binary_format Binary Format
*/
class Execute_load_query_log_event
: public Query_log_event,
public binary_log::Execute_load_query_event {
public:
#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,
binary_log::enum_load_dup_handling dup_handling_arg, bool using_trans,
bool immediate, bool suppress_use, int errcode);
int pack_info(Protocol *protocol) override;
#else
void print(FILE *file, PRINT_EVENT_INFO *print_event_info) const override;
/* Prints the query as LOAD DATA LOCAL and with rewritten filename */
void print(FILE *file, PRINT_EVENT_INFO *print_event_info,
const char *local_fname) const;
#endif
Execute_load_query_log_event(
const char *buf, const Format_description_event *description_event);
~Execute_load_query_log_event() override {}
ulong get_post_header_size_for_derived() override;
#ifdef MYSQL_SERVER
bool write_post_header_for_derived(Basic_ostream *ostream) override;
#endif
bool is_sbr_logging_format() const override { return true; }
private:
#if defined(MYSQL_SERVER)
virtual int do_apply_event(Relay_log_info const *rli) override;
#endif
};
#if defined MYSQL_SERVER
class Load_query_generator {
public:
Load_query_generator(THD *thd_arg, const sql_exchange *ex, const char *db_arg,
const char *table_name_arg, bool is_concurrent_arg,
bool replace, bool ignore);
const String *generate(size_t *fn_start, size_t *fn_end);
private:
const size_t BUF_SIZE = 2048;
String str;
char *buf[2048];
THD *thd;
const sql_exchange *sql_ex;
const char *db;
const char *table_name;
const char *fname;
bool is_concurrent;
bool has_replace;
bool has_ignore;
};
#endif
#ifndef MYSQL_SERVER
/**
@class Unknown_log_event
*/
class Unknown_log_event : public binary_log::Unknown_event, public Log_event {
public:
/**
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_event *description_event)
: binary_log::Unknown_event(buf, description_event),
Log_event(header(), footer()) {
DBUG_TRACE;
if (!is_valid()) return;
common_header->set_is_valid(true);
return;
}
~Unknown_log_event() override {}
void print(FILE *file, PRINT_EVENT_INFO *print_event_info) const override;
Log_event_type get_type_code() { return binary_log::UNKNOWN_EVENT; }
};
#endif
char *str_to_hex(char *to, const char *from, size_t len);
/**
@class Table_map_log_event
Table_map_log_event which maps a table definition to a number.
@internal
The inheritance structure in the current design for the classes is
as follows:
Binary_log_event
^
|
|
Table_map_event Log_event
\ /
\ /
\ /
Table_map_log_event
@endinternal
*/
class Table_map_log_event : public binary_log::Table_map_event,
public Log_event {
public:
/** Constants */
enum { TYPE_CODE = binary_log::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
};
/** Special constants representing sets of flags */
enum {
TM_NO_FLAGS = 0U,
TM_BIT_LEN_EXACT_F = (1U << 0),
TM_REFERRED_FK_DB_F = (1U << 1)
};
flag_set get_flags(flag_set flag) const { return m_flags & flag; }
#ifdef MYSQL_SERVER
Table_map_log_event(THD *thd_arg, TABLE *tbl, const Table_id &tid,
bool is_transactional);
#endif
Table_map_log_event(const char *buf,
const Format_description_event *description_event);
~Table_map_log_event() override;
#ifndef MYSQL_SERVER
table_def *create_table_def() {
DBUG_ASSERT(m_colcnt > 0);
return new table_def(m_coltype, m_colcnt, m_field_metadata,
m_field_metadata_size, m_null_bits, m_flags);
}
static bool rewrite_db_in_buffer(char **buf, ulong *event_len,
const Format_description_event &fde);
#endif
const Table_id &get_table_id() const { return m_table_id; }
const char *get_table_name() const { return m_tblnam.c_str(); }
const char *get_db_name() const { return m_dbnam.c_str(); }
virtual size_t get_data_size() override { return m_data_size; }
#ifdef MYSQL_SERVER
virtual int save_field_metadata();
virtual bool write_data_header(Basic_ostream *ostream) override;
virtual bool write_data_body(Basic_ostream *ostream) override;
virtual const char *get_db() override { return m_dbnam.c_str(); }
virtual uint8 mts_number_dbs() override {
return get_flags(TM_REFERRED_FK_DB_F) ? OVER_MAX_DBS_IN_EVENT_MTS : 1;
}
/**
@param[out] arg pointer to a struct containing char* array
pointers be filled in and the number of filled instances.
@param rpl_filter pointer to a replication filter.
@return number of databases in the array: either one or
OVER_MAX_DBS_IN_EVENT_MTS, when the Table map event reports
foreign keys constraint.
*/
virtual uint8 get_mts_dbs(Mts_db_names *arg,
Rpl_filter *rpl_filter) override {
const char *db_name = get_db();
if (!rpl_filter->is_rewrite_empty() && !get_flags(TM_REFERRED_FK_DB_F)) {
size_t dummy_len;
const char *db_filtered = rpl_filter->get_rewrite_db(db_name, &dummy_len);
// db_name != db_filtered means that db_name is rewritten.
if (strcmp(db_name, db_filtered)) db_name = db_filtered;
}
if (!get_flags(TM_REFERRED_FK_DB_F)) arg->name[0] = db_name;
return arg->num = mts_number_dbs();
}
#endif
#if defined(MYSQL_SERVER)
virtual int pack_info(Protocol *protocol) override;
#endif
#ifndef MYSQL_SERVER
virtual void print(FILE *file,
PRINT_EVENT_INFO *print_event_info) const override;
/**
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) const;
/**
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) const;
#endif
bool is_rbr_logging_format() const override { return true; }
private:
#if defined(MYSQL_SERVER)
virtual int do_apply_event(Relay_log_info const *rli) override;
virtual int do_update_pos(Relay_log_info *rli) override;
virtual enum_skip_reason do_shall_skip(Relay_log_info *rli) override;
#endif
#ifdef MYSQL_SERVER
TABLE *m_table;
// 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(std::function<bool(const Field *)> include_type,
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
#ifndef MYSQL_SERVER
class Charset_iterator;
class Default_charset_iterator;
class Column_charset_iterator;
#endif
};
#ifdef HAVE_PSI_STAGE_INTERFACE
/*
Helper class for PSI context while applying a Rows_log_event.
*/
class Rows_applier_psi_stage {
private:
Rows_applier_psi_stage(const Rows_applier_psi_stage &rhs);
Rows_applier_psi_stage &operator=(const Rows_applier_psi_stage &rhs);
/**
A cached pointer to this stage PSI_stage_progress.
*/
PSI_stage_progress *m_progress;
/**
Counter that is unconditionally incremented on each row that is processed.
This is helpful in case estimation is needed after started processing
a Rows_log_event.
*/
ulonglong m_n_rows_applied;
public:
Rows_applier_psi_stage() : m_progress(nullptr), m_n_rows_applied(0) {}
void set_progress(PSI_stage_progress *progress) { m_progress = progress; }
/**
If instrumentation is enabled this member function SHALL return true.
@return true if instrumentation is enabled for the given stage, false
otherwise.
*/
bool is_enabled() { return m_progress != nullptr; }
/**
This member function shall update the progress and reestimate the remaining
work needed. This MUST be called after setting n_rows_applied correctly
by calling inc_n_rows_applied beforehand.
Cursor, begin and end are used in case estimation is needed.
@param cursor Pointer to where we are in the buffer of rows to be processed.
@param begin Pointer to the beginning of the rows buffer.
@param end Pointer to the end of the rows buffer.
*/
void update_work_estimated_and_completed(const uchar *cursor,
const uchar *begin,
const uchar *end) {
if (!is_enabled()) return;
ulonglong estimated = mysql_stage_get_work_estimated(m_progress);
/* Estimate if need be. */
if (estimated == 0) {
DBUG_ASSERT(cursor > begin);
ulonglong avg_row_change_size = (cursor - begin) / m_n_rows_applied;
estimated = (end - begin) / avg_row_change_size;
mysql_stage_set_work_estimated(m_progress, estimated);
}
/* reset estimated if done more work than estimated */
if (m_n_rows_applied > estimated)
mysql_stage_set_work_estimated(m_progress, m_n_rows_applied);
mysql_stage_set_work_completed(m_progress, m_n_rows_applied);
}
/**
Resets this object.
*/
void end_work() {
m_progress = nullptr;
m_n_rows_applied = 0;
}
/**
Updates the counter of processed rows.
@param delta the amount of increment to be done.
*/
void inc_n_rows_applied(ulonglong delta) { m_n_rows_applied += delta; }
/**
Gets the value of the counter of rows that have been processed.
@return the value of the counter of rows processed so far.
*/
ulonglong get_n_rows_applied() { return m_n_rows_applied; }
};
#endif
/**
@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.
Virtual inheritance is required here to handle the diamond problem in
the class Write_rows_log_event, Update_rows_log_event and
Delete_rows_log_event.
The diamond structure is explained in @c Write_rows_log_event,
@c Update_rows_log_event,
@c Delete_rows_log_event
@internal
The inheritance structure in the current design for the classes is
as follows:
Binary_log_event
^
|
|
Rows_event Log_event
\ /
<<vir>>\ /
\ /
Rows_log_event
@endinternal
*/
class Rows_log_event : public virtual binary_log::Rows_event, public Log_event {
#ifdef HAVE_PSI_STAGE_INTERFACE
protected:
Rows_applier_psi_stage m_psi_progress;
#endif
public:
typedef uint16 flag_set;
enum row_lookup_mode {
ROW_LOOKUP_UNDEFINED = 0,
ROW_LOOKUP_NOT_NEEDED = 1,
ROW_LOOKUP_INDEX_SCAN = 2,
ROW_LOOKUP_TABLE_SCAN = 3,
ROW_LOOKUP_HASH_SCAN = 4
};
/**
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 */
};
/* Special constants representing sets of flags */
enum { RLE_NO_FLAGS = 0U };
~Rows_log_event() override;
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; }
virtual Log_event_type
get_general_type_code() = 0; /* General rows op type, no version */
#if defined(MYSQL_SERVER)
virtual int pack_info(Protocol *protocol) override;
#endif
#ifndef MYSQL_SERVER
void 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,
enum_row_image_type row_image_type);
#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 size_t get_data_size() override;
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; }
const Table_id &get_table_id() const { return m_table_id; }
#if defined(MYSQL_SERVER)
/**
Compares the table's read/write_set with the columns included in
this event's before-image and/or after-image. Each subclass
(Write/Update/Delete) implements this function by comparing on the
image(s) pertinent to the subclass.
@param[in] table The table to compare this events bitmaps
against.
@retval true if sets match
@retval false otherwise (following bitmap_cmp return logic).
*/
virtual bool read_write_bitmaps_cmp(const TABLE *table) const = 0;
#endif
#ifdef MYSQL_SERVER
virtual bool write_data_header(Basic_ostream *ostream) override;
virtual bool write_data_body(Basic_ostream *ostream) override;
virtual const char *get_db() override { return m_table->s->db.str; }
#endif
uint m_row_count; /* The number of rows added to the event */
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 *, const Table_id &table_id,
MY_BITMAP const *cols, bool is_transactional,
Log_event_type event_type,
const unsigned char *extra_row_ndb_info);
#endif
Rows_log_event(const char *row_data,
const Format_description_event *description_event);
#ifndef MYSQL_SERVER
void print_helper(FILE *, PRINT_EVENT_INFO *) const;
#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
MY_BITMAP m_cols; /* Bitmap denoting columns available */
#ifdef MYSQL_SERVER
/**
Hash table that will hold the entries for while using HASH_SCAN
algorithm to search and update/delete rows.
*/
Hash_slave_rows m_hash;
/**
The algorithm to use while searching for rows using the before
image.
*/
uint m_rows_lookup_algorithm;
#endif
/*
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;
/* Bit buffers in the same memory as the class */
uint32 m_bitbuf[128 / (sizeof(uint32) * 8)];
uint32 m_bitbuf_ai[128 / (sizeof(uint32) * 8)];
/*
is_valid depends on the value of m_rows_buf, so while changing the value
of m_rows_buf check if is_valid also needs to be modified
*/
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 */
/* helper functions */
#if defined(MYSQL_SERVER)
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 */
uint m_key_index;
KEY *m_key_info; /* Points to description of index #m_key_index */
class Key_compare {
public:
/**
@param ki Where to find KEY description
@note m_distinct_keys is instantiated when Rows_log_event is constructed;
it stores a Key_compare object internally. However at that moment, the
index (KEY*) to use for comparisons, is not yet known. So, at
instantiation, we indicate the Key_compare the place where it can
find the KEY* when needed (this place is Rows_log_event::m_key_info),
Key_compare remembers the place in member m_key_info.
Before we need to do comparisons - i.e. before we need to insert
elements, we update Rows_log_event::m_key_info once for all.
*/
Key_compare(KEY **ki = nullptr) : m_key_info(ki) {}
bool operator()(uchar *k1, uchar *k2) const {
return key_cmp2((*m_key_info)->key_part, k1, (*m_key_info)->key_length,
k2, (*m_key_info)->key_length) < 0;
}
private:
KEY **m_key_info;
};
std::set<uchar *, Key_compare> m_distinct_keys;
std::set<uchar *, Key_compare>::iterator m_itr;
/**
A spare buffer which will be used when saving the distinct keys
for doing an index scan with HASH_SCAN search algorithm.
*/
uchar *m_distinct_key_spare_buf;
/**
Unpack the current row image from the event into m_table->record[0].
@param rli The applier context.
@param cols The bitmap of columns included in the update.
@param is_after_image Should be true if this is an after-image,
false if it is a before-image.
@param only_seek @see unpack_row()
@retval 0 Success
@retval ER_* On error, it is guaranteed that the error has been
reported through my_error, and the corresponding ER_* code is
returned. Currently the error codes are: EE_OUTOFMEMORY,
ER_SLAVE_CORRUPT_EVENT, or various JSON errors when applying JSON
diffs (ER_COULD_NOT_APPLY_JSON_DIFF, ER_INVALID_JSON_BINARY_DATA,
and maybe others).
*/
int unpack_current_row(const Relay_log_info *const rli, MY_BITMAP const *cols,
bool is_after_image, bool only_seek = false);
/*
This member function is called when deciding the algorithm to be used to
find the rows to be updated on the slave during row based replication.
This this functions sets the m_rows_lookup_algorithm and also the
m_key_index with the key index to be used if the algorithm is dependent on
an index.
*/
void decide_row_lookup_algorithm_and_key();
/*
Encapsulates the operations to be done before applying
row event for update and delete.
*/
int row_operations_scan_and_key_setup();
/*
Encapsulates the operations to be done after applying
row event for update and delete.
*/
int row_operations_scan_and_key_teardown(int error);
/**
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.
*/
bool is_auto_inc_in_extra_columns();
#endif
bool is_rbr_logging_format() const override { return true; }
private:
#if defined(MYSQL_SERVER)
virtual int do_apply_event(Relay_log_info const *rli) override;
virtual int do_update_pos(Relay_log_info *rli) override;
virtual enum_skip_reason do_shall_skip(Relay_log_info *rli) override;
/*
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(const Relay_log_info *const rli) = 0;
/**
Private member function called while handling idempotent errors.
@param rli Pointer to relay log info structure.
@param [in,out] err the error to handle. If it is listed as
idempotent/ignored related error, then it is cleared.
@returns true if the slave should stop executing rows.
*/
int handle_idempotent_and_ignored_errors(Relay_log_info const *rli, int *err);
/**
Private member function called after updating/deleting a row. It
performs some assertions and more importantly, it updates
m_curr_row so that the next row is processed during the row
execution main loop (@c Rows_log_event::do_apply_event()).
@param rli Pointer to relay log info structure.
@param err the current error code.
*/
void do_post_row_operations(Relay_log_info const *rli, int err);
/**
Commodity wrapper around do_exec_row(), that deals with resetting
the thd reference in the table.
*/
int do_apply_row(Relay_log_info const *rli);
/**
Implementation of the index scan and update algorithm. It uses
PK, UK or regular Key to search for the record to update. When
found it updates it.
*/
int do_index_scan_and_update(Relay_log_info const *rli);
/**
Implementation of the hash_scan and update algorithm. It collects
rows positions in a hashtable until the last row is
unpacked. Then it scans the table to update and when a record in
the table matches the one in the hashtable, the update/delete is
performed.
*/
int do_hash_scan_and_update(Relay_log_info const *rli);
/**
Implementation of the legacy table_scan and update algorithm. For
each unpacked row it scans the storage engine table for a
match. When a match is found, the update/delete operations are
performed.
*/
int do_table_scan_and_update(Relay_log_info const *rli);
/**
Seek past the after-image of an update event, in case a row was processed
without reading the after-image.
An update event may process a row without reading the after-image,
e.g. in case of ignored or idempotent errors. To ensure that the
read position for the next row is correct, we need to seek past
the after-image.
@param rli The applier context
@param curr_bi_start The read position of the beginning of the
before-image. (The function compares this with m_curr_row to know
if the after-image has been read or not.)
@retval 0 Success
@retval ER_* Error code returned by unpack_current_row
*/
virtual int skip_after_image_for_update_event(
const Relay_log_info *rli MY_ATTRIBUTE((unused)),
const uchar *curr_bi_start MY_ATTRIBUTE((unused))) {
return 0;
}
/**
Initializes scanning of rows. Opens an index and initailizes an iterator
over a list of distinct keys (m_distinct_keys) if it is a HASH_SCAN
over an index or the table if its a HASH_SCAN over the table.
*/
int open_record_scan();
/**
Does the cleanup
- closes the index if opened by open_record_scan
- closes the table if opened for scanning.
*/
int close_record_scan();
/**
Fetches next row. If it is a HASH_SCAN over an index, it populates
table->record[0] with the next row corresponding to the index. If
the indexes are in non-contigous ranges it fetches record corresponding
to the key value in the next range.
@param first_read signifying if this is the first time we are reading a row
over an index.
@return error code when there are no more records to be fetched or some
other error occurred,
- 0 otherwise.
*/
int next_record_scan(bool first_read);
/**
Populates the m_distinct_keys with unique keys to be modified
during HASH_SCAN over keys.
@returns 0 success, or the error code.
*/
int add_key_to_distinct_keyset();
/**
Populates the m_hash when using HASH_SCAN. Thence, it:
- unpacks the before image (BI)
- saves the positions
- saves the positions into the hash map, using the
BI checksum as key
- unpacks the after image (AI) if needed, so that
m_curr_row_end gets updated correctly.
@param rli The reference to the relay log info object.
@returns 0 on success. Otherwise, the error code.
*/
int do_hash_row(Relay_log_info const *rli);
/**
This member function scans the table and applies the changes
that had been previously hashed. As such, m_hash MUST be filled
by do_hash_row before calling this member function.
@param rli The reference to the relay log info object.
@returns 0 on success. Otherwise, the error code.
*/
int do_scan_and_update(Relay_log_info const *rli);
#endif /* defined(MYSQL_SERVER) */
friend class Old_rows_log_event;
/**
This bitmap is used as a backup for the write set while we calculate
the values for any hidden generated columns (functional indexes). In order
to calculate the values, the columns must be marked in the write set. After
the values are caluclated, we set the write set back to it's original value.
*/
MY_BITMAP write_set_backup;
};
/**
@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.
@internal
The inheritance structure is as follows
Binary_log_event
^
|
|
|
Log_event B_l:Rows_event
^ /\
| / \
| <<vir>>/ \ <<vir>>
| / \
| / \
| / \
Rows_log_event B_l:W_R_E
\ /
\ /
\ /
\ /
\ /
\/
Write_rows_log_event
B_l: Namespace Binary_log
W_R_E: class Write_rows_event
@endinternal
*/
class Write_rows_log_event : public Rows_log_event,
public binary_log::Write_rows_event {
public:
enum {
/* Support interface to THD::binlog_prepare_pending_rows_event */
TYPE_CODE = binary_log::WRITE_ROWS_EVENT
};
#if defined(MYSQL_SERVER)
Write_rows_log_event(THD *, TABLE *, const Table_id &table_id,
bool is_transactional,
const unsigned char *extra_row_ndb_info);
#endif
Write_rows_log_event(const char *buf,
const Format_description_event *description_event);
#if defined(MYSQL_SERVER)
static bool binlog_row_logging_function(
THD *thd, TABLE *table, bool is_transactional,
const uchar *before_record MY_ATTRIBUTE((unused)),
const uchar *after_record);
bool read_write_bitmaps_cmp(const TABLE *table) const override {
return bitmap_cmp(get_cols(), table->write_set);
}
#endif
protected:
int write_row(const Relay_log_info *const, const bool);
private:
virtual Log_event_type get_general_type_code() override {
return (Log_event_type)TYPE_CODE;
}
#ifndef MYSQL_SERVER
void print(FILE *file, PRINT_EVENT_INFO *print_event_info) const override;
#endif
#if defined(MYSQL_SERVER)
virtual int do_before_row_operations(
const Slave_reporting_capability *const) override;
virtual int do_after_row_operations(const Slave_reporting_capability *const,
int) override;
virtual int do_exec_row(const Relay_log_info *const) override;
#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.
@internal
The inheritance structure is as follows
Binary_log_event
^
|
|
|
Log_event B_l:Rows_event
^ /\
| / \
| <<vir>>/ \ <<vir>>
| / \
| / \
| / \
Rows_log_event B_l:U_R_E
\ /
\ /
\ /
\ /
\ /
\/
Update_rows_log_event
B_l: Namespace Binary_log
U_R_E: class Update_rows_event
@eninternal
*/
class Update_rows_log_event : public Rows_log_event,
public binary_log::Update_rows_event {
public:
enum {
/* Support interface to THD::binlog_prepare_pending_rows_event */
TYPE_CODE = binary_log::UPDATE_ROWS_EVENT
};
#ifdef MYSQL_SERVER
Update_rows_log_event(THD *, TABLE *, const Table_id &table_id,
MY_BITMAP const *cols_bi, MY_BITMAP const *cols_ai,
bool is_transactional,
const unsigned char *extra_row_ndb_info);
Update_rows_log_event(THD *, TABLE *, const Table_id &table_id,
bool is_transactional,
const unsigned char *extra_row_ndb_info);
void init(MY_BITMAP const *cols, const MY_BITMAP &cols_to_subtract);
#endif
~Update_rows_log_event() override;
Update_rows_log_event(const char *buf,
const Format_description_event *description_event);
#ifdef MYSQL_SERVER
static bool binlog_row_logging_function(THD *thd, TABLE *table,
bool is_transactional,
const uchar *before_record,
const uchar *after_record);
bool read_write_bitmaps_cmp(const TABLE *table) const override {
return (bitmap_cmp(get_cols(), table->read_set) &&
bitmap_cmp(get_cols_ai(), table->write_set));
}
#endif
protected:
virtual Log_event_type get_general_type_code() override {
return (Log_event_type)TYPE_CODE;
}
#ifndef MYSQL_SERVER
void print(FILE *file, PRINT_EVENT_INFO *print_event_info) const override;
#endif
#if defined(MYSQL_SERVER)
virtual int do_before_row_operations(
const Slave_reporting_capability *const) override;
virtual int do_after_row_operations(const Slave_reporting_capability *const,
int) override;
virtual int do_exec_row(const Relay_log_info *const) override;
virtual int skip_after_image_for_update_event(
const Relay_log_info *rli, const uchar *curr_bi_start) override;
private:
/**
Auxiliary function used in the (THD*, ...) constructor to
determine the type code based on configuration options.
@param thd_arg The THD object for the session.
@return One of UPDATE_ROWS_EVENT_V1, PARTIAL_UPDATE_ROWS_EVENT, or
UPDATE_ROWS_EVENT.
*/
static binary_log::Log_event_type get_update_rows_event_type(
const THD *thd_arg);
#endif /* defined(MYSQL_SERVER) */
};
/**
@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.
@internal
The inheritance structure is as follows
Binary_log_event
^
|
|
|
Log_event B_l:Rows_event
^ /\
| / \
| <<vir>>/ \ <<vir>>
| / \
| / \
| / \
Rows_log_event B_l:D_R_E
\ /
\ /
\ /
\ /
\ /
\/
Delete_rows_log_event
B_l: Namespace Binary_log
D_R_E: class Delete_rows_event
@endinternal
*/
class Delete_rows_log_event : public Rows_log_event,
public binary_log::Delete_rows_event {
public:
enum {
/* Support interface to THD::binlog_prepare_pending_rows_event */
TYPE_CODE = binary_log::DELETE_ROWS_EVENT
};
#ifdef MYSQL_SERVER
Delete_rows_log_event(THD *, TABLE *, const Table_id &, bool is_transactional,
const unsigned char *extra_row_ndb_info);
#endif
Delete_rows_log_event(const char *buf,
const Format_description_event *description_event);
#ifdef MYSQL_SERVER
static bool binlog_row_logging_function(
THD *thd, TABLE *table, bool is_transactional, const uchar *before_record,
const uchar *after_record MY_ATTRIBUTE((unused)));
bool read_write_bitmaps_cmp(const TABLE *table) const override {
return bitmap_cmp(get_cols(), table->read_set);
}
#endif
protected:
virtual Log_event_type get_general_type_code() override {
return (Log_event_type)TYPE_CODE;
}
#ifndef MYSQL_SERVER
void print(FILE *file, PRINT_EVENT_INFO *print_event_info) const override;
#endif
#if defined(MYSQL_SERVER)
virtual int do_before_row_operations(
const Slave_reporting_capability *const) override;
virtual int do_after_row_operations(const Slave_reporting_capability *const,
int) override;
virtual int do_exec_row(const Relay_log_info *const) override;
#endif
};
/**
@class Incident_log_event
Class representing an incident, an occurance 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.
Its the derived class of Incident_event
@internal
The inheritance structure is as follows
Binary_log_event
^
|
|
B_l:Incident_event Log_event
\ /
\ /
\ /
\ /
Incident_log_event
B_l: Namespace Binary_log
@endinternal
*/
class Incident_log_event : public binary_log::Incident_event, public Log_event {
public:
#ifdef MYSQL_SERVER
Incident_log_event(THD *thd_arg, enum_incident incident_arg)
: binary_log::Incident_event(incident_arg),
Log_event(thd_arg, LOG_EVENT_NO_FILTER_F, Log_event::EVENT_NO_CACHE,
Log_event::EVENT_IMMEDIATE_LOGGING, header(), footer()) {
DBUG_TRACE;
DBUG_PRINT("enter", ("incident: %d", incident_arg));
common_header->set_is_valid(incident_arg > INCIDENT_NONE &&
incident_arg < INCIDENT_COUNT);
DBUG_ASSERT(message == nullptr && message_length == 0);
return;
}
Incident_log_event(THD *thd_arg, enum_incident incident_arg,
LEX_CSTRING const msg)
: binary_log::Incident_event(incident_arg),
Log_event(thd_arg, LOG_EVENT_NO_FILTER_F, Log_event::EVENT_NO_CACHE,
Log_event::EVENT_IMMEDIATE_LOGGING, header(), footer()) {
DBUG_TRACE;
DBUG_PRINT("enter", ("incident: %d", incident_arg));
common_header->set_is_valid(incident_arg > INCIDENT_NONE &&
incident_arg < INCIDENT_COUNT);
DBUG_ASSERT(message == nullptr && message_length == 0);
if (!(message = (char *)my_malloc(key_memory_Incident_log_event_message,
msg.length + 1, MYF(MY_WME)))) {
// The allocation failed. Mark this binlog event as invalid.
common_header->set_is_valid(false);
return;
}
strmake(message, msg.str, msg.length);
message_length = msg.length;
return;
}
#endif
#ifdef MYSQL_SERVER
int pack_info(Protocol *) override;
#endif
Incident_log_event(const char *buf,
const Format_description_event *description_event);
~Incident_log_event() override;
#ifndef MYSQL_SERVER
virtual void print(FILE *file,
PRINT_EVENT_INFO *print_event_info) const override;
#endif
#if defined(MYSQL_SERVER)
virtual int do_apply_event(Relay_log_info const *rli) override;
virtual bool write_data_header(Basic_ostream *ostream) override;
virtual bool write_data_body(Basic_ostream *ostream) override;
#endif
virtual size_t get_data_size() override {
return Binary_log_event::INCIDENT_HEADER_LEN + 1 + message_length;
}
virtual bool ends_group() const override { return true; }
private:
const char *description() const;
};
/**
@class Ignorable_log_event
Base class for ignorable log events is Ignorable_event.
Events deriving from this class can be safely ignored
by slaves that cannot recognize them.
Its the derived class of Ignorable_event
@internal
The inheritance structure is as follows
Binary_log_event
^
|
|
B_l:Ignorable_event Log_event
\ /
<<virtual>>\ /
\ /
Ignorable_log_event
B_l: Namespace Binary_log
@endinternal
*/
class Ignorable_log_event : public virtual binary_log::Ignorable_event,
public Log_event {
public:
#ifdef MYSQL_SERVER
Ignorable_log_event(THD *thd_arg)
: Log_event(thd_arg, LOG_EVENT_IGNORABLE_F, Log_event::EVENT_STMT_CACHE,
Log_event::EVENT_NORMAL_LOGGING, header(), footer()) {
DBUG_TRACE;
common_header->set_is_valid(true);
return;
}
#endif
Ignorable_log_event(const char *buf,
const Format_description_event *descr_event);
~Ignorable_log_event() override;
#ifdef MYSQL_SERVER
int pack_info(Protocol *) override;
#endif
#ifndef MYSQL_SERVER
virtual void print(FILE *file,
PRINT_EVENT_INFO *print_event_info) const override;
#endif
virtual size_t get_data_size() override {
return Binary_log_event::IGNORABLE_HEADER_LEN;
}
};
/**
@class Rows_query_log_event
It is used to record the original query for the rows
events in RBR.
It is the subclass of Ignorable_log_event and Rows_query_event
@internal
The inheritance structure in the current design for the classes is
as follows:
Binary_log_event
^
|
|
|
Log_event B_l:Ignorable_event
^ /\
| / \
| <<vir>>/ \ <<vir>>
| / \
| / \
| / \
Ignorable_log_event B_l:Rows_query_event
\ /
\ /
\ /
\ /
\ /
\/
Rows_query_log_event
B_l : namespace binary_log
@endinternal
*/
class Rows_query_log_event : public Ignorable_log_event,
public binary_log::Rows_query_event {
public:
#ifdef MYSQL_SERVER
Rows_query_log_event(THD *thd_arg, const char *query, size_t query_len)
: Ignorable_log_event(thd_arg) {
DBUG_TRACE;
common_header->type_code = binary_log::ROWS_QUERY_LOG_EVENT;
if (!(m_rows_query =
(char *)my_malloc(key_memory_Rows_query_log_event_rows_query,
query_len + 1, MYF(MY_WME))))
return;
snprintf(m_rows_query, query_len + 1, "%s", query);
DBUG_PRINT("enter", ("%s", m_rows_query));
return;
}
#endif
#ifdef MYSQL_SERVER
int pack_info(Protocol *) override;
virtual int do_apply_event(Relay_log_info const *rli) override;
virtual bool write_data_body(Basic_ostream *ostream) override;
#endif
Rows_query_log_event(const char *buf,
const Format_description_event *descr_event);
~Rows_query_log_event() override {
if (m_rows_query) my_free(m_rows_query);
m_rows_query = nullptr;
}
#ifndef MYSQL_SERVER
virtual void print(FILE *file,
PRINT_EVENT_INFO *print_event_info) const override;
#endif
virtual size_t get_data_size() override {
return Binary_log_event::IGNORABLE_HEADER_LEN + 1 + strlen(m_rows_query);
}
};
static inline bool copy_event_cache_to_file_and_reinit(IO_CACHE *cache,
FILE *file,
bool flush_stream) {
return my_b_copy_to_file(cache, file) ||
(flush_stream ? (fflush(file) || ferror(file)) : 0) ||
reinit_io_cache(cache, WRITE_CACHE, 0, false, true);
}
#ifdef MYSQL_SERVER
/*****************************************************************************
Heartbeat Log Event class
The class is not logged to a binary log, and is not applied on to the slave.
The decoding of the event on the slave side is done by its superclass,
binary_log::Heartbeat_event.
****************************************************************************/
class Heartbeat_log_event : public binary_log::Heartbeat_event,
public Log_event {
public:
Heartbeat_log_event(const char *buf,
const Format_description_event *description_event);
};
/**
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
int append_query_string(const THD *thd, const CHARSET_INFO *csinfo,
String const *from, String *to);
extern TYPELIB binlog_checksum_typelib;
/**
@class Gtid_log_event
This is a subclass if Gtid_event and Log_event. It contains
per-transaction fields, including the GTID and logical timestamps
used by MTS.
@internal
The inheritance structure is as follows
Binary_log_event
^
|
|
B_l:Gtid_event Log_event
\ /
\ /
\ /
\ /
Gtid_log_event
B_l: Namespace Binary_log
@endinternal
*/
class Gtid_log_event : public binary_log::Gtid_event, public Log_event {
public:
#ifdef MYSQL_SERVER
/**
Create a new event using the GTID owned by the given thread.
*/
Gtid_log_event(THD *thd_arg, bool using_trans, int64 last_committed_arg,
int64 sequence_number_arg, bool may_have_sbr_stmts_arg,
ulonglong original_commit_timestamp_arg,
ulonglong immediate_commit_timestamp_arg,
uint32_t original_server_version_arg,
uint32_t immediate_server_version_arg);
/**
Create a new event using the GTID from the given Gtid_specification
without a THD object.
*/
Gtid_log_event(uint32 server_id_arg, bool using_trans,
int64 last_committed_arg, int64 sequence_number_arg,
bool may_have_sbr_stmts_arg,
ulonglong original_commit_timestamp_arg,
ulonglong immediate_commit_timestamp_arg,
const Gtid_specification spec_arg,
uint32_t original_server_version_arg,
uint32_t immediate_server_version_arg);
#endif
#ifdef MYSQL_SERVER
int pack_info(Protocol *) override;
#endif
Gtid_log_event(const char *buffer,
const Format_description_event *description_event);
~Gtid_log_event() override {}
size_t get_data_size() override {
DBUG_EXECUTE_IF("do_not_write_rpl_timestamps", return POST_HEADER_LENGTH;);
return POST_HEADER_LENGTH + get_commit_timestamp_length() +
net_length_size(transaction_length) + get_server_version_length();
}
size_t get_event_length() { return LOG_EVENT_HEADER_LEN + get_data_size(); }
private:
/// Used internally by both print() and pack_info().
size_t to_string(char *buf) const;
#ifdef MYSQL_SERVER
/**
Writes the post-header to the given output stream.
This is an auxiliary function typically used by the write() member
function.
@param ostream The output stream to write to.
@retval true Error.
@retval false Success.
*/
bool write_data_header(Basic_ostream *ostream) override;
bool write_data_body(Basic_ostream *ostream) override;
/**
Writes the post-header to the given memory buffer.
This is an auxiliary function used by write_to_memory.
@param[in,out] buffer Buffer to which the post-header will be written.
@return The number of bytes written, i.e., always
Gtid_log_event::POST_HEADER_LENGTH.
*/
uint32 write_post_header_to_memory(uchar *buffer);
/**
Writes the body to the given memory buffer.
This is an auxiliary function used by write_to_memory.
@param [in,out] buff Buffer to which the data will be written.
@return The number of bytes written, i.e.,
If the transaction did not originated on this server
Gtid_event::IMMEDIATE_COMMIT_TIMESTAMP_LENGTH.
else
FULL_COMMIT_TIMESTAMP_LENGTH.
*/
uint32 write_body_to_memory(uchar *buff);
#endif
public:
#ifndef MYSQL_SERVER
void print(FILE *file, PRINT_EVENT_INFO *print_event_info) const override;
#endif
#ifdef MYSQL_SERVER
/**
Writes this event to a memory buffer.
@param buf The event will be written to this buffer.
@return the number of bytes written, i.e., always
LOG_EVENT_HEADER_LEN + Gtid_log_event::POST_HEADEr_LENGTH.
*/
uint32 write_to_memory(uchar *buf) {
common_header->data_written = LOG_EVENT_HEADER_LEN + get_data_size();
uint32 len = write_header_to_memory(buf);
len += write_post_header_to_memory(buf + len);
len += write_body_to_memory(buf + len);
return len;
}
#endif
#if defined(MYSQL_SERVER)
int do_apply_event(Relay_log_info const *rli) override;
int do_update_pos(Relay_log_info *rli) override;
enum_skip_reason do_shall_skip(Relay_log_info *rli) override;
#endif
/**
Return the gtid type for this Gtid_log_event: this can be
either ANONYMOUS_GTID, AUTOMATIC_GTID, or ASSIGNED_GTID.
*/
enum_gtid_type get_type() const { return spec.type; }
/**
Return the SID for this GTID. The SID is shared with the
Log_event so it should not be modified.
*/
const rpl_sid *get_sid() const { return &sid; }
/**
Return the SIDNO relative to the global sid_map for this GTID.
This requires a lookup and possibly even update of global_sid_map,
hence global_sid_lock must be held. If global_sid_lock is not
held, the caller must pass need_lock=true. If there is an error
(e.g. out of memory) while updating global_sid_map, this function
returns a negative number.
@param need_lock If true, the read lock on global_sid_lock is
acquired and released inside this function; if false, the read
lock or write lock must be held prior to calling this function.
@retval SIDNO if successful
@retval negative if adding SID to global_sid_map causes an error.
*/
rpl_sidno get_sidno(bool need_lock);
/**
Return the SIDNO relative to the given Sid_map for this GTID.
This assumes that the Sid_map is local to the thread, and thus
does not use locks.
@param sid_map The sid_map to use.
@retval SIDNO if successful.
@retval negative if adding SID to sid_map causes an error.
*/
rpl_sidno get_sidno(Sid_map *sid_map) { return sid_map->add_sid(sid); }
/// Return the GNO for this GTID.
rpl_gno get_gno() const { return spec.gtid.gno; }
/// string holding the text "SET @@GLOBAL.GTID_NEXT = '"
static const char *SET_STRING_PREFIX;
private:
/// Length of SET_STRING_PREFIX
static const size_t SET_STRING_PREFIX_LENGTH = 26;
/// The maximal length of the entire "SET ..." query.
static const size_t MAX_SET_STRING_LENGTH = SET_STRING_PREFIX_LENGTH +
binary_log::Uuid::TEXT_LENGTH +
1 + MAX_GNO_TEXT_LENGTH + 1;
private:
/**
Internal representation of the GTID. The SIDNO will be
uninitialized (value -1) until the first call to get_sidno(bool).
*/
Gtid_specification spec;
/// SID for this GTID.
rpl_sid sid;
public:
/**
Set the transaction length information based on binlog cache size.
Note that is_checksum_enabled and event_counter are optional parameters.
When not specified, the function will assume that no checksum will be used
and the informed cache_size is the final transaction size without
considering the GTID event size.
The high level formula that will be used by the function is:
trx_length = cache_size +
cache_checksum_active * cache_events * CRC32_payload +
gtid_length +
cache_checksum_active * CRC32_payload; // For the GTID.
@param cache_size The size of the binlog cache in bytes.
@param is_checksum_enabled If checksum will be added to events on flush.
@param event_counter The amount of events in the cache.
*/
void set_trx_length_by_cache_size(ulonglong cache_size,
bool is_checksum_enabled = false,
int event_counter = 0);
};
/**
@class Previous_gtids_log_event
This is the subclass of Previous_gtids_event and Log_event
It is used to record the gtid_executed in the last binary log file,
for ex after flush logs, or at the starting of the binary log file
@internal
The inheritance structure is as follows
Binary_log_event
^
|
|
B_l:Previous_gtids_event Log_event
\ /
\ /
\ /
\ /
Previous_gtids_log_event
B_l: Namespace Binary_log
@endinternal
*/
class Previous_gtids_log_event : public binary_log::Previous_gtids_event,
public Log_event {
public:
#ifdef MYSQL_SERVER
Previous_gtids_log_event(const Gtid_set *set);
#endif
#ifdef MYSQL_SERVER
int pack_info(Protocol *) override;
#endif
Previous_gtids_log_event(const char *buf,
const Format_description_event *description_event);
~Previous_gtids_log_event() override {}
size_t get_data_size() override { return buf_size; }
#ifndef MYSQL_SERVER
void print(FILE *file, PRINT_EVENT_INFO *print_event_info) const override;
#endif
#ifdef MYSQL_SERVER
bool write(Basic_ostream *ostream) override {
if (DBUG_EVALUATE_IF("skip_writing_previous_gtids_log_event", 1, 0) &&
/*
The skip_writing_previous_gtids_log_event debug point was designed
for skipping the writing of the previous_gtids_log_event on binlog
files only.
*/
!is_relay_log_event()) {
DBUG_PRINT("info",
("skip writing Previous_gtids_log_event because of"
"debug option 'skip_writing_previous_gtids_log_event'"));
return false;
}
if (DBUG_EVALUATE_IF("write_partial_previous_gtids_log_event", 1, 0) &&
/*
The write_partial_previous_gtids_log_event debug point was designed
for writing a partial previous_gtids_log_event on binlog files only.
*/
!is_relay_log_event()) {
DBUG_PRINT("info",
("writing partial Previous_gtids_log_event because of"
"debug option 'write_partial_previous_gtids_log_event'"));
return (Log_event::write_header(ostream, get_data_size()) ||
Log_event::write_data_header(ostream));
}
return (Log_event::write_header(ostream, get_data_size()) ||
Log_event::write_data_header(ostream) || write_data_body(ostream) ||
Log_event::write_footer(ostream));
}
bool write_data_body(Basic_ostream *ostream) override;
#endif
/// Return the encoded buffer, or NULL on error.
const uchar *get_buf() { return buf; }
/**
Return the formatted string, or NULL on error.
The string is allocated using my_malloc and it is the
responsibility of the caller to free it.
*/
char *get_str(size_t *length,
const Gtid_set::String_format *string_format) const;
/// Add all GTIDs from this event to the given Gtid_set.
int add_to_set(Gtid_set *gtid_set) const;
/*
Previous Gtid Log events should always be skipped
there is nothing to apply there, whether it is
relay log's (generated on Slave) or it is binary log's
(generated on Master, copied to slave as relay log).
Also, we should not increment slave_skip_counter
for this event, hence return EVENT_SKIP_IGNORE.
*/
#if defined(MYSQL_SERVER)
enum_skip_reason do_shall_skip(Relay_log_info *) override // 1358
{
return EVENT_SKIP_IGNORE;
}
int do_apply_event(Relay_log_info const *) override { return 0; }
int do_update_pos(Relay_log_info *rli) override;
#endif
};
/**
@class Transaction_context_log_event
This is the subclass of Transaction_context_event and Log_event
This class encodes the transaction_context_log_event.
@internal
The inheritance structure is as follows
Binary_log_event
^
|
|
B_l:Transaction_context_event Log_event
\ /
\ /
\ /
\ /
Transaction_context_log_event
B_l: Namespace Binary_log
@endinternal
*/
class Transaction_context_log_event
: public binary_log::Transaction_context_event,
public Log_event {
private:
/// The Sid_map to use for creating the Gtid_set.
Sid_map *sid_map;
/// A gtid_set which is used to store the transaction set used for
/// conflict detection.
Gtid_set *snapshot_version;
#ifdef MYSQL_SERVER
bool write_data_header(Basic_ostream *ostream) override;
bool write_data_body(Basic_ostream *ostream) override;
bool write_snapshot_version(Basic_ostream *ostream);
bool write_data_set(Basic_ostream *ostream, std::list<const char *> *set);
#endif
size_t get_snapshot_version_size();
static int get_data_set_size(std::list<const char *> *set);
size_t to_string(char *buf, ulong len) const;
public:
#ifdef MYSQL_SERVER
Transaction_context_log_event(const char *server_uuid_arg, bool using_trans,
my_thread_id thread_id_arg,
bool is_gtid_specified_arg);
#endif
Transaction_context_log_event(const char *buffer,
const Format_description_event *descr_event);
~Transaction_context_log_event() override;
size_t get_data_size() override;
#ifdef MYSQL_SERVER
int pack_info(Protocol *protocol) override;
#endif
#ifndef MYSQL_SERVER
void print(FILE *file, PRINT_EVENT_INFO *print_event_info) const override;
#endif
#if defined(MYSQL_SERVER)
int do_apply_event(Relay_log_info const *) override { return 0; }
int do_update_pos(Relay_log_info *rli) override;
#endif
/**
Add a hash which identifies a inserted/updated/deleted row on the
ongoing transaction.
@param[in] hash row identifier
*/
void add_write_set(const char *hash);
/**
Return a pointer to write-set list.
*/
std::list<const char *> *get_write_set() { return &write_set; }
/**
Add a hash which identifies a read row on the ongoing transaction.
@param[in] hash row identifier
*/
void add_read_set(const char *hash);
/**
Return a pointer to read-set list.
*/
std::list<const char *> *get_read_set() { return &read_set; }
/**
Read snapshot version from encoded buffers.
Cannot be executed during data read from file (event constructor),
since its required locks will collide with the server gtid state
initialization procedure.
*/
bool read_snapshot_version();
/**
Return the transaction snapshot timestamp.
*/
Gtid_set *get_snapshot_version() { return snapshot_version; }
/**
Return the server uuid.
*/
const char *get_server_uuid() { return server_uuid; }
/**
Return the id of the committing thread.
*/
my_thread_id get_thread_id() { return static_cast<my_thread_id>(thread_id); }
/**
Return true if transaction has GTID_NEXT specified, false otherwise.
*/
bool is_gtid_specified() { return gtid_specified == true; }
};
/**
@class View_change_log_event
This is the subclass of View_change_log_event and Log_event
This class created the view_change_log_event which is used as a marker in
case a new node joins or leaves the group.
@internal
The inheritance structure is as follows
Binary_log_event
^
|
|
B_l: View_change_event Log_event
\ /
\ /
\ /
\ /
View_change_log_event
B_l: Namespace Binary_log
@endinternal
*/
class View_change_log_event : public binary_log::View_change_event,
public Log_event {
private:
size_t to_string(char *buf, ulong len) const;
#ifdef MYSQL_SERVER
bool write_data_header(Basic_ostream *ostream) override;
bool write_data_body(Basic_ostream *ostream) override;
bool write_data_map(Basic_ostream *ostream,
std::map<std::string, std::string> *map);
#endif
size_t get_size_data_map(std::map<std::string, std::string> *map);
public:
View_change_log_event(const char *view_id);
View_change_log_event(const char *buffer,
const Format_description_event *descr_event);
~View_change_log_event() override;
size_t get_data_size() override;
#ifdef MYSQL_SERVER
int pack_info(Protocol *protocol) override;
#endif
#ifndef MYSQL_SERVER
void print(FILE *file, PRINT_EVENT_INFO *print_event_info) const override;
#endif
#if defined(MYSQL_SERVER)
int do_apply_event(Relay_log_info const *rli) override;
int do_update_pos(Relay_log_info *rli) override;
#endif
/**
Returns the view id.
*/
char *get_view_id() { return view_id; }
/**
Sets the certification info in the event
@note size is calculated on this method as the size of the data
might render the log even invalid. Also due to its size doing it
here avoid looping over the data multiple times.
@param[in] info certification info to be written
@param[out] event_size the event size after this operation
*/
void set_certification_info(std::map<std::string, std::string> *info,
size_t *event_size);
/**
Returns the certification info
*/
std::map<std::string, std::string> *get_certification_info() {
return &certification_info;
}
/**
Set the certification sequence number
@param number the sequence number
*/
void set_seq_number(rpl_gno number) { seq_number = number; }
/**
Returns the certification sequence number
*/
rpl_gno get_seq_number() { return seq_number; }
};
inline bool is_gtid_event(Log_event *evt) {
return (evt->get_type_code() == binary_log::GTID_LOG_EVENT ||
evt->get_type_code() == binary_log::ANONYMOUS_GTID_LOG_EVENT);
}
/**
The function checks the argument event properties to deduce whether
it represents an atomic DDL.
@param evt a reference to Log_event
@return true when the DDL properties are found,
false otherwise
*/
inline bool is_atomic_ddl_event(Log_event *evt) {
return evt != nullptr && evt->get_type_code() == binary_log::QUERY_EVENT &&
static_cast<Query_log_event *>(evt)->ddl_xid !=
binary_log::INVALID_XID;
}
/**
The function lists all DDL instances that are supported
for crash-recovery (WL9175).
todo: the supported feature list is supposed to grow. Once
a feature has been readied for 2pc through WL7743,9536(7141/7016) etc
it needs registering in the function.
@param thd an Query-log-event creator thread handle
@param using_trans
The caller must specify the value accoding to the following
rules:
@c true when
- on master the current statement is not processing
a table in SE which does not support atomic DDL
- on slave the relay-log repository is transactional.
@c false otherwise.
@return true when the being created (master) or handled (slave) event
is 2pc-capable, @c false otherwise.
*/
bool is_atomic_ddl(THD *thd, bool using_trans);
#ifdef MYSQL_SERVER
/**
Serialize an binary event to the given output stream. It is more general
than call ev->write() directly. The caller will not be affected if any
change happens in serialization process. For example, serializing the
event in different format.
*/
template <class EVENT>
bool binary_event_serialize(EVENT *ev, Basic_ostream *ostream) {
return ev->write(ostream);
}
/*
This is an utility function that adds a quoted identifier into the a buffer.
This also escapes any existance of the quote string inside the identifier.
*/
size_t my_strmov_quoted_identifier(THD *thd, char *buffer,
const char *identifier, size_t length);
#else
size_t my_strmov_quoted_identifier(char *buffer, const char *identifier);
#endif
size_t my_strmov_quoted_identifier_helper(int q, char *buffer,
const char *identifier,
size_t length);
/**
Read an integer in net_field_length format, guarding against read out of
bounds and advancing the position.
@param[in,out] packet Pointer to buffer to read from. On successful
return, the buffer position will be incremented to point to the next
byte after what was read.
@param[in,out] max_length Pointer to the number of bytes in the
buffer. If the function would need to look at more than *max_length
bytes in order to decode the number, the function will do nothing
and return true.
@param[out] out Pointer where the value will be stored.
@retval false Success.
@retval true Failure, i.e., reached end of buffer.
*/
template <typename T>
bool net_field_length_checked(const uchar **packet, size_t *max_length, T *out);
/**
@} (end of group Replication)
*/
#endif /* _log_event_h */