在内部,服务器使用C++类文件来表示binlog事件。标准在log_event.h文件中,这些类的方法代码在log_event.cc中。
log_event是基础类。其他的详细的事件子类都是来源于他。一个事件的二进制序列包含头和数据两部分。类型码在每个事件的头部出现。事件可能的类型码定义在log_event_type枚举类中:
enum Log_event_type {
UNKNOWN_EVENT= 0,
START_EVENT_V3= 1,
QUERY_EVENT= 2,
STOP_EVENT= 3,
ROTATE_EVENT= 4,
INTVAR_EVENT= 5,
LOAD_EVENT= 6,
SLAVE_EVENT= 7,
CREATE_FILE_EVENT= 8,
APPEND_BLOCK_EVENT= 9,
EXEC_LOAD_EVENT= 10,
DELETE_FILE_EVENT= 11,
NEW_LOAD_EVENT= 12,
RAND_EVENT= 13,
USER_VAR_EVENT= 14,
FORMAT_DESCRIPTION_EVENT= 15,
XID_EVENT= 16,
BEGIN_LOAD_QUERY_EVENT= 17,
EXECUTE_LOAD_QUERY_EVENT= 18,
TABLE_MAP_EVENT = 19,
PRE_GA_WRITE_ROWS_EVENT = 20,
PRE_GA_UPDATE_ROWS_EVENT = 21,
PRE_GA_DELETE_ROWS_EVENT = 22,
WRITE_ROWS_EVENT = 23,
UPDATE_ROWS_EVENT = 24,
DELETE_ROWS_EVENT = 25,
INCIDENT_EVENT= 26,
HEARTBEAT_LOG_EVENT= 27,
IGNORABLE_LOG_EVENT= 28,
ROWS_QUERY_LOG_EVENT= 29,
WRITE_ROWS_EVENT = 30,
UPDATE_ROWS_EVENT = 31,
DELETE_ROWS_EVENT = 32,
GTID_LOG_EVENT= 33,
ANONYMOUS_GTID_LOG_EVENT= 34,
PREVIOUS_GTIDS_LOG_EVENT= 35,
ENUM_END_EVENT
/* end marker */
};
INTVAR_EVENT有子类型,定义在Int_event_type枚举类中:
enum Int_event_type {
INVALID_INT_EVENT = LAST_INSERT_ID_EVENT = INSERT_ID_EVENT = 2
};
网友评论