【Mysql】从binlog中找出单个表的binlog信息

2024-04-02 19:04:59 469人浏览独家记忆

摘要

无聊研究binlog写了个提取单个表的binlog 的信息，便于误删恢复数据，这样做的目的是为了减少恢复时其他表可能引起的出错，以及缩短恢复时间首先研究binlog日志的格式如下：

无聊研究binlog写了个提取单个表的binlog 的信息，便于误删恢复数据，这样做的目的是为了减少恢复时其他表可能引起的出错，以及缩短恢复时间
首先研究binlog日志的格式

如下：
;
;
DELIMITER ;
# at 4
#160229 15:19:52 server id 162 end_log_pos 123 CRC32 0xbbe9b551 Start: binlog v 4, server v 5.7.9-log created 160229 15:19:52 at startup
# Warning: this binlog is either in use or was not closed properly.
ROLLBACK;
BINLOG '
GPHTVg+iAAAAdwAAAHsAAAABAAQANS43LjktbG9nAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAY8dNWEzgNAAgAEgAEBAQEEgAAXwAEGggAAAaiCAGCAAAACGoKKioAEjQA
AVG16bs=
';
# at 123
#160229 15:19:52 server id 162 end_log_pos 154 CRC32 0xd473f6f4 Previous-GTIDs
# [empty]
# at 154
#160229 15:18:07 server id 162 end_log_pos 219 CRC32 0xe86bb499 Anonymous_GTID last_committed=0 sequence_number=1
SET @@SESSION.GTID_NEXT= 'ANONYMOUS';
# at 219
#160229 15:18:07 server id 162 end_log_pos 291 CRC32 0xe1803afe Query thread_id=102887 exec_time=341 error_code=0
SET TIMESTAMP=1456730287;
SET @@session.pseudo_thread_id=102887;
SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=0, @@session.unique_checks=1, @@session.autocommit=1;
SET @@session.sql_mode=524288;
SET @@session.auto_increment_increment=1, @@session.auto_increment_offset=1;
;
SET @@session.character_set_client=8,@@session.collation_connection=8,@@session.collation_server=33;
SET @@session.lc_time_names=0;
SET @@session.collation_database=DEFAULT;
BEGIN
;
# at 291
#160229 15:18:07 server id 162 end_log_pos 343 CRC32 0xcfc435f2 Table_map: `test`.`ty` mapped to number 127
# at 343
#160229 15:18:07 server id 162 end_log_pos 463 CRC32 0xb4ef18fe Write_rows: table id 127 flags: STMT_END_F
BINLOG '
r/DTVhOiAAAANAAAAFcBAAAAAH8AAAAAAAEABHRlc3QAAnR5AAQDDw8DBBQAFAAP8jXEzw==
r/DTVh7iAAAAeAAAAM8BAAAAAH8AAAAAAAEAAgAE//AFAAAABEVFRUUCQzFfAAAA8AEAAAAEQUFB
QQJDMUMAAADwAwAAAARDQ0NDAkMxQwAAAPAEAAAABEREREQCQzFBAAAA8AIAAAAEQkJCQgJDMTcA
AAD+GO+0
';
# at 463
#160229 15:18:07 server id 162 end_log_pos 494 CRC32 0xed1fb95b Xid = 53

COMMIT; -------到第一个commit为第一部分为binlog必须的，缺失会报错
# at 494
#160229 15:18:07 server id 162 end_log_pos 559 CRC32 0xef3ac14c Anonymous_GTID last_committed=1 sequence_number=2
SET @@SESSION.GTID_NEXT= 'ANONYMOUS';
# at 559
#160229 15:18:07 server id 162 end_log_pos 631 CRC32 0xe834f1d8 Query thread_id=102887 exec_time=350 error_code=0
SET TIMESTAMP=1456730287;
BEGIN
;
# at 631
#160229 15:18:07 server id 162 end_log_pos 683 CRC32 0xc64ac724 Table_map: `test`.`ty` mapped to number 127
# at 683
#160229 15:18:07 server id 162 end_log_pos 803 CRC32 0x4a5f1c75 Write_rows: table id 127 flags: STMT_END_F
BINLOG '
r/DTVhOiAAAANAAAAKsCAAAAAH8AAAAAAAEABHRlc3QAAnR5AAQDDw8DBBQAFAAPJMdKxg==
r/DTVh7iAAAAeAAAACMDAAAAAH8AAAAAAAEAAgAE//AFAAAABEVFRUUCQzFfAAAA8AEAAAAEQUFB
QQJDMUMAAADwAwAAAARDQ0NDAkMxQwAAAPAEAAAABEREREQCQzFBAAAA8AIAAAAEQkJCQgJDMTcA
AAB1HF9K
';
# at 803
#160229 15:18:07 server id 162 end_log_pos 834 CRC32 0x96148022 Xid = 77

COMMIT; ------到下一个commit为第二部分，一个事物语句，可以缺失
# at 834
#160229 15:18:07 server id 162 end_log_pos 899 CRC32 0xa1e52982 Anonymous_GTID last_committed=2 sequence_number=3
SET @@SESSION.GTID_NEXT= 'ANONYMOUS';
# at 899
#160229 15:18:07 server id 162 end_log_pos 971 CRC32 0x89fc0e48 Query thread_id=102887 exec_time=359 error_code=0
SET TIMESTAMP=1456730287;
BEGIN
;
# at 971
#160229 15:18:07 server id 162 end_log_pos 1023 CRC32 0xc1309696 Table_map: `test`.`ty` mapped to number 127
# at 1023
#160229 15:18:07 server id 162 end_log_pos 1143 CRC32 0x0993D08b Write_rows: table id 127 flags: STMT_END_F
BINLOG '
r/DTVhOiAAAANAAAAP8DAAAAAH8AAAAAAAEABHRlc3QAAnR5AAQDDw8DBBQAFAAPlpYwwQ==
r/DTVh7iAAAAeAAAAHcEAAAAAH8AAAAAAAEAAgAE//AFAAAABEVFRUUCQzFfAAAA8AEAAAAEQUFB
QQJDMUMAAADwAwAAAARDQ0NDAkMxQwAAAPAEAAAABEREREQCQzFBAAAA8AIAAAAEQkJCQgJDMTcA
AACL0JMJ
';
# at 1143
#160229 15:18:07 server id 162 end_log_pos 1174 CRC32 0x7c2054fd Xid = 101

。。。。。省略

COMMIT; -------最后一个commit到最后必须存在
SET @@SESSION.GTID_NEXT= 'AUTOMATIC' ;
DELIMITER ;
# End of log file
;
;