MySQL 8.4.3
Source Code Documentation
Delete_rows_log_event Class Reference

Log row deletions. More...

#include <log_event.h>

Inheritance diagram for Delete_rows_log_event:
[legend]

Public Types

enum  { TYPE_CODE = mysql::binlog::event::DELETE_ROWS_EVENT }
 
- Public Types inherited from Rows_log_event
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
}
 
enum  enum_error {
  ERR_OPEN_FAILURE = -1 , ERR_OK = 0 , ERR_TABLE_LIMIT_EXCEEDED = 1 , ERR_OUT_OF_MEM = 2 ,
  ERR_BAD_TABLE_DEF = 3 , ERR_RBR_TO_SBR = 4
}
 Enumeration of the errors that can be returned. More...
 
enum  { RLE_NO_FLAGS = 0U }
 
typedef uint16 flag_set
 
- Public Types inherited from mysql::binlog::event::Rows_event
enum  enum_flag {
  STMT_END_F = (1U << 0) , NO_FOREIGN_KEY_CHECKS_F = (1U << 1) , RELAXED_UNIQUE_CHECKS_F = (1U << 2) , COMPLETE_ROWS_F = (1U << 3) ,
  ALL_FLAGS
}
 These definitions allow to combine the flags into an appropriate flag set using the normal bitwise operators. More...
 
- Public Types inherited from mysql::binlog::event::Binary_log_event
enum  enum_post_header_length {
  QUERY_HEADER_MINIMAL_LEN = (4 + 4 + 1 + 2) , QUERY_HEADER_LEN = (QUERY_HEADER_MINIMAL_LEN + 2) , STOP_HEADER_LEN = 0 , START_V3_HEADER_LEN = (2 + ST_SERVER_VER_LEN + 4) ,
  ROTATE_HEADER_LEN = 8 , INTVAR_HEADER_LEN = 0 , APPEND_BLOCK_HEADER_LEN = 4 , DELETE_FILE_HEADER_LEN = 4 ,
  RAND_HEADER_LEN = 0 , USER_VAR_HEADER_LEN = 0 , FORMAT_DESCRIPTION_HEADER_LEN = (START_V3_HEADER_LEN + 1 + LOG_EVENT_TYPES) , XID_HEADER_LEN = 0 ,
  BEGIN_LOAD_QUERY_HEADER_LEN = APPEND_BLOCK_HEADER_LEN , ROWS_HEADER_LEN_V1 = 8 , TABLE_MAP_HEADER_LEN = 8 , EXECUTE_LOAD_QUERY_EXTRA_HEADER_LEN = (4 + 4 + 4 + 1) ,
  EXECUTE_LOAD_QUERY_HEADER_LEN , INCIDENT_HEADER_LEN = 2 , HEARTBEAT_HEADER_LEN = 0 , IGNORABLE_HEADER_LEN = 0 ,
  ROWS_HEADER_LEN_V2 = 10 , TRANSACTION_CONTEXT_HEADER_LEN = 18 , VIEW_CHANGE_HEADER_LEN = 52 , XA_PREPARE_HEADER_LEN = 0 ,
  TRANSACTION_PAYLOAD_HEADER_LEN = 0
}
 The lengths for the fixed data part of each event. More...
 
- Public Types inherited from Log_event
enum  enum_skip_reason { EVENT_SKIP_NOT , EVENT_SKIP_IGNORE , EVENT_SKIP_COUNT }
 Enumeration of what kinds of skipping (and non-skipping) that can occur when the slave executes an event. More...
 

Public Member Functions

 Delete_rows_log_event (THD *, TABLE *, const mysql::binlog::event::Table_id &, bool is_transactional, const unsigned char *extra_row_ndb_info)
 
 Delete_rows_log_event (const char *buf, const mysql::binlog::event::Format_description_event *description_event)
 
bool read_write_bitmaps_cmp (const TABLE *table) const override
 Compares the table's read/write_set with the columns included in this event's before-image and/or after-image. More...
 
void claim_memory_ownership (bool claim) override
 Allow thread to CLAIM or DISCLAIM the ownership of this object depends on the parameter value passed. More...
 
- Public Member Functions inherited from Rows_log_event
 Rows_log_event (Rows_log_event &&) noexcept=delete
 
Rows_log_eventoperator= (Rows_log_event &&) noexcept=delete
 
 Rows_log_event (const Rows_log_event &)=delete
 
Rows_log_eventoperator= (const Rows_log_event &)=delete
 
 ~Rows_log_event () override
 
void set_flags (flag_set flags_arg)
 
void clear_flags (flag_set flags_arg)
 
flag_set get_flags (flag_set flags_arg) const
 
int pack_info (Protocol *protocol) override
 Stores a string representation of this event in the Protocol. More...
 
int add_row_data (uchar *data, size_t length)
 
size_t get_data_size () override
 
MY_BITMAP const * get_cols () const
 
MY_BITMAP const * get_cols_ai () const
 
const mysql::binlog::event::Table_idget_table_id () const
 
bool write_data_header (Basic_ostream *ostream) override
 
bool write_data_body (Basic_ostream *ostream) override
 
const char * get_db () override
 
- Public Member Functions inherited from mysql::binlog::event::Rows_event
 Rows_event (Log_event_type type_arg)
 Constructs an event directly. More...
 
 Rows_event (const char *buf, const Format_description_event *fde)
 The constructor is responsible for decoding the event contained in the buffer. More...
 
 ~Rows_event () override
 
unsigned long long get_table_id () const
 
enum_flag get_flags () const
 
uint32_t get_null_bits_len () const
 
unsigned long get_width () const
 
std::string get_enum_flag_string () const
 Gets the flags listed as strings. More...
 
- Public Member Functions inherited from mysql::binlog::event::Binary_log_event
virtual ~Binary_log_event ()=0
 
 Binary_log_event (const Binary_log_event &)=default
 
 Binary_log_event (Binary_log_event &&)=default
 
Binary_log_eventoperator= (const Binary_log_event &)=default
 
Binary_log_eventoperator= (Binary_log_event &&)=default
 
enum Log_event_type get_event_type () const
 Helper method. More...
 
const Log_event_headerheader () const
 Return a const pointer to the header of the log event. More...
 
Log_event_headerheader ()
 Return a non-const pointer to the header of the log event. More...
 
const Log_event_footerfooter () const
 Return a const pointer to the footer of the log event. More...
 
Log_event_footerfooter ()
 Return a non-const pointer to the footer of the log event. More...
 
Event_readerreader ()
 Returns a reference to the event Event_reader object. More...
 
- Public Member Functions inherited from Log_event
 Log_event (mysql::binlog::event::Log_event_header *header, mysql::binlog::event::Log_event_footer *footer, enum_event_cache_type cache_type_arg, enum_event_logging_type logging_type_arg)
 This minimal constructor is for when you are not even sure that there is a valid THD. More...
 
 Log_event (THD *thd_arg, uint16 flags_arg, enum_event_cache_type cache_type_arg, enum_event_logging_type logging_type_arg, mysql::binlog::event::Log_event_header *header, mysql::binlog::event::Log_event_footer *footer)
 
int net_send (Protocol *protocol, const char *log_name, my_off_t pos)
 Only called by SHOW BINLOG EVENTS. More...
 
void * operator new (size_t size)
 
bool wrapper_my_b_safe_write (Basic_ostream *ostream, const uchar *buf, size_t data_length)
 Write the given buffer to the given output stream, updating the checksum if checksums are enabled. More...
 
virtual bool write (Basic_ostream *ostream)
 
time_t get_time ()
 Prints a "session_var=value" string. More...
 
virtual mysql::binlog::event::Log_event_type get_type_code () const
 
virtual bool is_sbr_logging_format () const
 Return true if the event has to be logged using SBR for DMLs. More...
 
bool is_valid ()
 
void set_artificial_event ()
 
void set_relay_log_event ()
 
bool is_artificial_event () const
 
bool is_relay_log_event () const
 
bool is_ignorable_event () const
 
bool is_no_filter_event () const
 
bool is_using_trans_cache () const
 
bool is_using_stmt_cache () const
 
bool is_using_immediate_logging () const
 
 Log_event (mysql::binlog::event::Log_event_header *header, mysql::binlog::event::Log_event_footer *footer)
 
virtual ~Log_event ()
 
void register_temp_buf (char *buf, bool free_in_destructor=true)
 
void free_temp_buf ()
 
const char * get_type_str () const
 Returns the human readable name of this event's type. More...
 
bool is_mts_sequential_exec ()
 Is called from get_mts_execution_mode() to. More...
 
virtual uint8 get_mts_dbs (Mts_db_names *arg, Rpl_filter *rpl_filter)
 The method fills in pointers to event's database name c-strings to a supplied array. More...
 
bool contains_partition_info (bool)
 
virtual uint8 mts_number_dbs ()
 
bool is_mts_group_isolated ()
 
virtual bool starts_group () const
 Events of a certain type can start or end a group of events treated transactionally wrt binlog. More...
 
virtual bool ends_group () const
 
int apply_event (Relay_log_info *rli)
 Apply the event to the database. More...
 
int apply_gtid_event (Relay_log_info *rli)
 Apply the GTID event in curr_group_data to the database. More...
 
int update_pos (Relay_log_info *rli)
 Update the relay log position. More...
 
enum_skip_reason shall_skip (Relay_log_info *rli)
 Decide if the event shall be skipped, and the reason for skipping it. More...
 
virtual int do_apply_event_worker (Slave_worker *w)
 
- Public Member Functions inherited from mysql::binlog::event::Delete_rows_event
 Delete_rows_event (const char *buf, const Format_description_event *fde)
 
 Delete_rows_event ()
 

Static Public Member Functions

static bool binlog_row_logging_function (THD *thd, TABLE *table, bool is_transactional, const uchar *before_record, const uchar *after_record)
 
- Static Public Member Functions inherited from mysql::binlog::event::Rows_event
static std::string get_flag_string (enum_flag flag)
 Gets a string describing the flags. More...
 
- Static Public Member Functions inherited from Log_event
static void init_show_field_list (mem_root_deque< Item * > *field_list)
 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. More...
 
static void operator delete (void *ptr, size_t)
 
static void * operator new (size_t, void *ptr)
 
static void operator delete (void *, void *)
 
static const char * get_type_str (mysql::binlog::event::Log_event_type type)
 Returns the human readable name of the given event type. More...
 
static const char * get_type_str (uint type)
 Get the name of an event type, or "Unknown" if out of range. More...
 

Protected Member Functions

mysql::binlog::event::Log_event_type get_general_type_code () override
 
int do_before_row_operations (const Relay_log_info *const) override
 
int do_after_row_operations (const Relay_log_info *const, int) override
 
int do_exec_row (const Relay_log_info *const) override
 
- Protected Member Functions inherited from Rows_log_event
 Rows_log_event (THD *, TABLE *, const mysql::binlog::event::Table_id &table_id, MY_BITMAP const *cols, bool is_transactional, mysql::binlog::event::Log_event_type event_type, const unsigned char *extra_row_ndb_info)
 
 Rows_log_event (const char *row_data, const mysql::binlog::event::Format_description_event *description_event)
 
virtual int do_add_row_data (uchar *data, size_t length)
 
int unpack_current_row (const Relay_log_info *const rli, MY_BITMAP const *cols, bool is_after_image, bool only_seek=false)
 Unpack the current row image from the event into m_table->record[0]. More...
 
int update_generated_columns (MY_BITMAP const &fields_to_update)
 Updates the generated columns of the TABLE object referenced by m_table, that have an active bit in the parameter bitset fields_to_update. More...
 
void decide_row_lookup_algorithm_and_key () SUPPRESS_UBSAN_CLANG10
 
int row_operations_scan_and_key_setup ()
 
int row_operations_scan_and_key_teardown (int error)
 
bool is_auto_inc_in_extra_columns (const Relay_log_info *const rli)
 Helper function to check whether there is an auto increment column on the table where the event is to be applied. More...
 
bool is_rbr_logging_format () const override
 Return true if the event has to be logged using RBR for DMLs. More...
 
- Protected Member Functions inherited from mysql::binlog::event::Binary_log_event
 Binary_log_event (Log_event_type type_code)
 This constructor is used to initialize the type_code of header object m_header. More...
 
 Binary_log_event (const char **buf, const Format_description_event *fde)
 This constructor will create a new object of Log_event_header and initialize the variable m_header, which in turn will be used to initialize Log_event's member common_header. More...
 
- Protected Member Functions inherited from Log_event
uint32 write_header_to_memory (uchar *buf)
 Writes the common header of this event to the given memory buffer. More...
 
bool write_header (Basic_ostream *ostream, size_t data_length)
 Writes the common-header of this event to the given output stream and updates the checksum. More...
 
bool write_footer (Basic_ostream *ostream)
 
bool need_checksum ()
 A decider of whether to trigger checksum computation or not. More...
 
enum_skip_reason continue_group (Relay_log_info *rli)
 Helper function to ignore an event w.r.t. More...
 

Additional Inherited Members

- Public Attributes inherited from Rows_log_event
uint m_row_count
 
- Public Attributes inherited from mysql::binlog::event::Rows_event
Extra_row_info m_extra_row_info
 
- Public Attributes inherited from Log_event
char * temp_buf
 
bool m_free_temp_buf_in_destructor
 
ulong exec_time
 
uint32 server_id
 
ulong rbr_exec_mode
 A storage to cache the global system variable's value. More...
 
enum_event_cache_type event_cache_type
 Defines the type of the cache, if any, where the event will be stored before being flushed to disk. More...
 
enum_event_logging_type event_logging_type
 Defines when information, i.e. More...
 
ha_checksum crc
 Placeholder for event checksum while writing to binlog. More...
 
ulong mts_group_idx
 Index in rli->gaq array to indicate a group that this event is purging. More...
 
mysql::binlog::event::Log_event_headercommon_header
 The Log_event_header class contains the variable present in the common header. More...
 
mysql::binlog::event::Log_event_footercommon_footer
 The Log_event_footer class contains the variable present in the common footer. More...
 
Relay_log_infoworker
 MTS: associating the event with either an assigned Worker or Coordinator. More...
 
ulonglong future_event_relay_log_pos
 A copy of the main rli value stored into event to pass to MTS worker rli. More...
 
THDthd
 
db_worker_hash_entrymts_assigned_partitions [MAX_DBS_IN_EVENT_MTS]
 Partition info associate with event to deliver to MTS event applier. More...
 
- Static Public Attributes inherited from mysql::binlog::event::Binary_log_event
static const int LOG_EVENT_TYPES = (ENUM_END_EVENT - 1)
 
- Protected Types inherited from Log_event
enum  enum_event_cache_type {
  EVENT_INVALID_CACHE = 0 , EVENT_STMT_CACHE , EVENT_TRANSACTIONAL_CACHE , EVENT_NO_CACHE ,
  EVENT_CACHE_COUNT
}
 
enum  enum_event_logging_type { EVENT_INVALID_LOGGING = 0 , EVENT_NORMAL_LOGGING , EVENT_IMMEDIATE_LOGGING , EVENT_CACHE_LOGGING_COUNT }
 
- Static Protected Member Functions inherited from Rows_log_event
static bool is_trx_retryable_upon_engine_error (int error)
 Helper function to check whether the storage engine error allows for the transaction to be retried or not. More...
 
- Protected Attributes inherited from Rows_log_event
Rows_applier_psi_stage m_psi_progress
 
TABLEm_table
 
MY_BITMAP m_cols
 
MY_BITMAP m_local_cols
 Bitmap denoting columns available in the image as they appear in the table setup. More...
 
Hash_slave_rows m_hash
 Hash table that will hold the entries for while using HASH_SCAN algorithm to search and update/delete rows. More...
 
uint m_rows_lookup_algorithm
 The algorithm to use while searching for rows using the before image. More...
 
MY_BITMAP m_cols_ai
 Bitmap for columns available in the after image, if present. More...
 
MY_BITMAP m_local_cols_ai
 Bitmap denoting columns available in the after-image as they appear in the table setup. More...
 
uint32 m_bitbuf [128/(sizeof(uint32) *8)]
 
uint32 m_bitbuf_ai [128/(sizeof(uint32) *8)]
 
ucharm_rows_buf
 
ucharm_rows_cur
 
ucharm_rows_end
 
const ucharm_curr_row
 
const ucharm_curr_row_end
 
ucharm_key
 
uint m_key_index
 
KEYm_key_info
 
std::set< uchar *, Key_comparem_distinct_keys
 
std::set< uchar *, Key_compare >::iterator m_itr
 
ucharm_distinct_key_spare_buf
 A spare buffer which will be used when saving the distinct keys for doing an index scan with HASH_SCAN search algorithm. More...
 
- Protected Attributes inherited from mysql::binlog::event::Rows_event
Log_event_type m_type
 
Table_id m_table_id
 Actual event type. More...
 
uint16_t m_flags
 
unsigned long m_width
 Flags for row-level events. More...
 
uint32_t n_bits_len
 The width of the columns bitmap. More...
 
uint16_t var_header_len
 value determined by (m_width + 7) / 8 More...
 
std::vector< uint8_t > columns_before_image
 
std::vector< uint8_t > columns_after_image
 
std::vector< uint8_t > row
 

Detailed Description

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.

Member Enumeration Documentation

◆ anonymous enum

anonymous enum
Enumerator
TYPE_CODE 

Constructor & Destructor Documentation

◆ Delete_rows_log_event() [1/2]

Delete_rows_log_event::Delete_rows_log_event ( THD thd_arg,
TABLE tbl_arg,
const mysql::binlog::event::Table_id tid,
bool  is_transactional,
const unsigned char *  extra_row_ndb_info 
)

◆ Delete_rows_log_event() [2/2]

Delete_rows_log_event::Delete_rows_log_event ( const char *  buf,
const mysql::binlog::event::Format_description_event description_event 
)

Member Function Documentation

◆ binlog_row_logging_function()

bool Delete_rows_log_event::binlog_row_logging_function ( THD thd,
TABLE table,
bool  is_transactional,
const uchar before_record,
const uchar after_record 
)
static

◆ claim_memory_ownership()

void Delete_rows_log_event::claim_memory_ownership ( bool  claim)
overridevirtual

Allow thread to CLAIM or DISCLAIM the ownership of this object depends on the parameter value passed.

Parameters
claimTrue - claim ownership of the memory False - disclaim ownership of the memory

Reimplemented from Log_event.

◆ do_after_row_operations()

int Delete_rows_log_event::do_after_row_operations ( const Relay_log_info * const  ,
int  error 
)
overrideprotectedvirtual

Implements Rows_log_event.

◆ do_before_row_operations()

int Delete_rows_log_event::do_before_row_operations ( const Relay_log_info * const  )
overrideprotectedvirtual

Implements Rows_log_event.

◆ do_exec_row()

int Delete_rows_log_event::do_exec_row ( const Relay_log_info * const  )
overrideprotectedvirtual

Implements Rows_log_event.

◆ get_general_type_code()

mysql::binlog::event::Log_event_type Delete_rows_log_event::get_general_type_code ( )
inlineoverrideprotectedvirtual

Implements Rows_log_event.

◆ read_write_bitmaps_cmp()

bool Delete_rows_log_event::read_write_bitmaps_cmp ( const TABLE table) const
inlineoverridevirtual

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.

Parameters
[in]tableThe table to compare this events bitmaps against.
Return values
trueif sets match
falseotherwise (following bitmap_cmp return logic).

Implements Rows_log_event.


The documentation for this class was generated from the following files: