共计 10394 个字符,预计需要花费 26 分钟才能阅读完成。
上文分析的二进制日志实际上是基于 STATEMENT 格式的,下面我们来看看基于 ROW 格式的二进制日志,毕竟,两者对应的 binlog 事件类型也不一样,同时,很多童鞋反映基于 ROW 格式的二进制日志无法查到原生的 DML 语句,关于这个问题,其实官方也给出了解决方案,下面,将一一揭晓。
关于 MySQL 二进制日志 http://www.linuxidc.com/Linux/2016-08/134341.htm
首先,来几条测试数据
mysql> set binlog_format=row;
Query OK, 0 rows affected (0.00 sec)
mysql> flush logs;
Query OK, 0 rows affected (0.01 sec)
mysql> insert into test.t1 values(1,'a');
Query OK, 1 row affected (0.00 sec)
mysql> use testDatabase changed
mysql> insert into t1 values(2,'b');
Query OK, 1 row affected (0.00 sec)
mysql> update t1 set name='c' where id=2;
Query OK, 1 row affected (0.00 sec)
Rows matched: 1 Changed: 1 Warnings: 0
mysql> delete from t1 where id=1;
Query OK, 1 row affected (0.01 sec)
首先通过 SHOW BINLOG EVENTS 查看二进制日志中的内容
mysql> show binlog events in 'mysql-bin.000025';
+------------------+-----+-------------+-----------+-------------+---------------------------------------+
| Log_name | Pos | Event_type | Server_id | End_log_pos | Info |
+------------------+-----+-------------+-----------+-------------+---------------------------------------+
| mysql-bin.000025 | 4 | Format_desc | 1 | 120 | Server ver: 5.6.31-log, Binlog ver: 4 |
| mysql-bin.000025 | 120 | Query | 1 | 188 | BEGIN |
| mysql-bin.000025 | 188 | Table_map | 1 | 236 | table_id: 79 (test.t1) |
| mysql-bin.000025 | 236 | Write_rows | 1 | 278 | table_id: 79 flags: STMT_END_F |
| mysql-bin.000025 | 278 | Xid | 1 | 309 | COMMIT /* xid=175 */ |
| mysql-bin.000025 | 309 | Query | 1 | 381 | BEGIN |
| mysql-bin.000025 | 381 | Table_map | 1 | 429 | table_id: 79 (test.t1) |
| mysql-bin.000025 | 429 | Write_rows | 1 | 471 | table_id: 79 flags: STMT_END_F |
| mysql-bin.000025 | 471 | Xid | 1 | 502 | COMMIT /* xid=183 */ |
| mysql-bin.000025 | 502 | Query | 1 | 574 | BEGIN |
| mysql-bin.000025 | 574 | Table_map | 1 | 622 | table_id: 79 (test.t1) |
| mysql-bin.000025 | 622 | Update_rows | 1 | 672 | table_id: 79 flags: STMT_END_F |
| mysql-bin.000025 | 672 | Xid | 1 | 703 | COMMIT /* xid=184 */ |
| mysql-bin.000025 | 703 | Query | 1 | 775 | BEGIN |
| mysql-bin.000025 | 775 | Table_map | 1 | 823 | table_id: 79 (test.t1) |
| mysql-bin.000025 | 823 | Delete_rows | 1 | 865 | table_id: 79 flags: STMT_END_F |
| mysql-bin.000025 | 865 | Xid | 1 | 896 | COMMIT /* xid=185 */ |
+------------------+-----+-------------+-----------+-------------+---------------------------------------+
17 rows in set (0.00 sec)
再来通过 mysqlbinlog 查看
# mysqlbinlog mysql-bin.000025
/*!50530 SET @@SESSION.PSEUDO_SLAVE_MODE=1*/;
/*!40019 SET @@session.max_insert_delayed_threads=0*/;
/*!50003 SET @OLD_COMPLETION_TYPE=@@COMPLETION_TYPE,COMPLETION_TYPE=0*/;
DELIMITER /*!*/;
# at 4
#160817 10:20:16 server id 1 end_log_pos 120 CRC32 0x5b15ac4f Start: binlog v 4, server v 5.6.31-log created 160817 10:20:16
# Warning: this binlog is either in use or was not closed properly.
BINLOG '4MmzVw8BAAAAdAAAAHgAAAABAAQANS42LjMxLWxvZwAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAEzgNAAgAEgAEBAQEEgAAXAAEGggAAAAICAgCAAAACgoKGRkAAU+s
FVs=
'/*!*/;
# at 120
#160817 10:20:22 server id 1 end_log_pos 188 CRC32 0x005847f0 Query thread_id=12 exec_time=0 error_code=0
SET TIMESTAMP=1471400422/*!*/;
SET @@session.pseudo_thread_id=12/*!*/;
SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=0, @@session.unique_checks=1, @@session.autocommit=1/*!*/;
SET @@session.sql_mode=1075838976/*!*/;
SET @@session.auto_increment_increment=1, @@session.auto_increment_offset=1/*!*/;
/*!\C utf8 *//*!*/;
SET @@session.character_set_client=33,@@session.collation_connection=33,@@session.collation_server=33/*!*/;
SET @@session.lc_time_names=0/*!*/;
SET @@session.collation_database=DEFAULT/*!*/;
BEGIN
/*!*/;
# at 188
#160817 10:20:22 server id 1 end_log_pos 236 CRC32 0x2b8d2069 Table_map: `test`.`t1` mapped to number 79
# at 236
#160817 10:20:22 server id 1 end_log_pos 278 CRC32 0xadc98fbc Write_rows: table id 79 flags: STMT_END_F
BINLOG '5smzVxMBAAAAMAAAAOwAAAAAAE8AAAAAAAEABHRlc3QAAnQxAAIDDwIeAANpII0r
5smzVx4BAAAAKgAAABYBAAAAAE8AAAAAAAEAAgAC//wBAAAAAWG8j8mt
'/*!*/;
# at 278
#160817 10:20:22 server id 1 end_log_pos 309 CRC32 0x552dc682 Xid = 175
COMMIT/*!*/;
# at 309
#160817 10:20:34 server id 1 end_log_pos 381 CRC32 0x17d8173e Query thread_id=12 exec_time=0 error_code=0
SET TIMESTAMP=1471400434/*!*/;
BEGIN
/*!*/;
# at 381
#160817 10:20:34 server id 1 end_log_pos 429 CRC32 0x71a27e19 Table_map: `test`.`t1` mapped to number 79
# at 429
#160817 10:20:34 server id 1 end_log_pos 471 CRC32 0xefda98ca Write_rows: table id 79 flags: STMT_END_F
BINLOG '8smzVxMBAAAAMAAAAK0BAAAAAE8AAAAAAAEABHRlc3QAAnQxAAIDDwIeAAMZfqJx
8smzVx4BAAAAKgAAANcBAAAAAE8AAAAAAAEAAgAC//wCAAAAAWLKmNrv
'/*!*/;
# at 471
#160817 10:20:34 server id 1 end_log_pos 502 CRC32 0x7bed11c4 Xid = 183
COMMIT/*!*/;
# at 502
#160817 10:20:38 server id 1 end_log_pos 574 CRC32 0xd164b750 Query thread_id=12 exec_time=0 error_code=0
SET TIMESTAMP=1471400438/*!*/;
BEGIN
/*!*/;
# at 574
#160817 10:20:38 server id 1 end_log_pos 622 CRC32 0x9fa3cabc Table_map: `test`.`t1` mapped to number 79
# at 622
#160817 10:20:38 server id 1 end_log_pos 672 CRC32 0xb1646398 Update_rows: table id 79 flags: STMT_END_F
BINLOG '9smzVxMBAAAAMAAAAG4CAAAAAE8AAAAAAAEABHRlc3QAAnQxAAIDDwIeAAO8yqOf
9smzVx8BAAAAMgAAAKACAAAAAE8AAAAAAAEAAgAC///8AgAAAAFi/AIAAAABY5hjZLE=
'/*!*/;
# at 672
#160817 10:20:38 server id 1 end_log_pos 703 CRC32 0x91a90c52 Xid = 184
COMMIT/*!*/;
# at 703
#160817 10:20:43 server id 1 end_log_pos 775 CRC32 0x5ae24c0b Query thread_id=12 exec_time=0 error_code=0
SET TIMESTAMP=1471400443/*!*/;
BEGIN
/*!*/;
# at 775
#160817 10:20:43 server id 1 end_log_pos 823 CRC32 0x33c52e84 Table_map: `test`.`t1` mapped to number 79
# at 823
#160817 10:20:43 server id 1 end_log_pos 865 CRC32 0x77e907a2 Delete_rows: table id 79 flags: STMT_END_F
BINLOG '+8mzVxMBAAAAMAAAADcDAAAAAE8AAAAAAAEABHRlc3QAAnQxAAIDDwIeAAOELsUz
+8mzVyABAAAAKgAAAGEDAAAAAE8AAAAAAAEAAgAC//wBAAAAAWGiB+l3
'/*!*/;
# at 865
#160817 10:20:43 server id 1 end_log_pos 896 CRC32 0xb0988385 Xid = 185
COMMIT/*!*/;
DELIMITER ;
# End of log file
ROLLBACK /* added by mysqlbinlog */;
/*!50003 SET COMPLETION_TYPE=@OLD_COMPLETION_TYPE*/;
/*!50530 SET @@SESSION.PSEUDO_SLAVE_MODE=0*/;
额,what is this,竟然没看到一条明文的 DML 语句
实际上,对于 ROW 格式的二进制日志,需要使用如下方式查看,这也是 STATEMENT 和 ROW 格式的差异之一
# mysqlbinlog mysql-bin.000025 -vv –base64-output=decode-rows
/*!50530 SET @@SESSION.PSEUDO_SLAVE_MODE=1*/;
/*!40019 SET @@session.max_insert_delayed_threads=0*/;
/*!50003 SET @OLD_COMPLETION_TYPE=@@COMPLETION_TYPE,COMPLETION_TYPE=0*/;
DELIMITER /*!*/;
# at 4
#160817 10:20:16 server id 1 end_log_pos 120 CRC32 0x5b15ac4f Start: binlog v 4, server v 5.6.31-log created 160817 10:20:16
# Warning: this binlog is either in use or was not closed properly.
# at 120
#160817 10:20:22 server id 1 end_log_pos 188 CRC32 0x005847f0 Query thread_id=12 exec_time=0 error_code=0
SET TIMESTAMP=1471400422/*!*/;
SET @@session.pseudo_thread_id=12/*!*/;
SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=0, @@session.unique_checks=1, @@session.autocommit=1/*!*/;
SET @@session.sql_mode=1075838976/*!*/;
SET @@session.auto_increment_increment=1, @@session.auto_increment_offset=1/*!*/;
/*!\C utf8 *//*!*/;
SET @@session.character_set_client=33,@@session.collation_connection=33,@@session.collation_server=33/*!*/;
SET @@session.lc_time_names=0/*!*/;
SET @@session.collation_database=DEFAULT/*!*/;
BEGIN
/*!*/;
# at 188
#160817 10:20:22 server id 1 end_log_pos 236 CRC32 0x2b8d2069 Table_map: `test`.`t1` mapped to number 79
# at 236
#160817 10:20:22 server id 1 end_log_pos 278 CRC32 0xadc98fbc Write_rows: table id 79 flags: STMT_END_F
### INSERT INTO `test`.`t1`
### SET
### @1=1 /* INT meta=0 nullable=1 is_null=0 */
### @2='a' /* VARSTRING(30) meta=30 nullable=1 is_null=0 */
# at 278
#160817 10:20:22 server id 1 end_log_pos 309 CRC32 0x552dc682 Xid = 175
COMMIT/*!*/;
# at 309
#160817 10:20:34 server id 1 end_log_pos 381 CRC32 0x17d8173e Query thread_id=12 exec_time=0 error_code=0
SET TIMESTAMP=1471400434/*!*/;
BEGIN
/*!*/;
# at 381
#160817 10:20:34 server id 1 end_log_pos 429 CRC32 0x71a27e19 Table_map: `test`.`t1` mapped to number 79
# at 429
#160817 10:20:34 server id 1 end_log_pos 471 CRC32 0xefda98ca Write_rows: table id 79 flags: STMT_END_F
### INSERT INTO `test`.`t1`
### SET
### @1=2 /* INT meta=0 nullable=1 is_null=0 */
### @2='b' /* VARSTRING(30) meta=30 nullable=1 is_null=0 */
# at 471
#160817 10:20:34 server id 1 end_log_pos 502 CRC32 0x7bed11c4 Xid = 183
COMMIT/*!*/;
# at 502
#160817 10:20:38 server id 1 end_log_pos 574 CRC32 0xd164b750 Query thread_id=12 exec_time=0 error_code=0
SET TIMESTAMP=1471400438/*!*/;
BEGIN
/*!*/;
# at 574
#160817 10:20:38 server id 1 end_log_pos 622 CRC32 0x9fa3cabc Table_map: `test`.`t1` mapped to number 79
# at 622
#160817 10:20:38 server id 1 end_log_pos 672 CRC32 0xb1646398 Update_rows: table id 79 flags: STMT_END_F
### UPDATE `test`.`t1`
### WHERE
### @1=2 /* INT meta=0 nullable=1 is_null=0 */
### @2='b' /* VARSTRING(30) meta=30 nullable=1 is_null=0 */
### SET
### @1=2 /* INT meta=0 nullable=1 is_null=0 */
### @2='c' /* VARSTRING(30) meta=30 nullable=1 is_null=0 */
# at 672
#160817 10:20:38 server id 1 end_log_pos 703 CRC32 0x91a90c52 Xid = 184
COMMIT/*!*/;
# at 703
#160817 10:20:43 server id 1 end_log_pos 775 CRC32 0x5ae24c0b Query thread_id=12 exec_time=0 error_code=0
SET TIMESTAMP=1471400443/*!*/;
BEGIN
/*!*/;
# at 775
#160817 10:20:43 server id 1 end_log_pos 823 CRC32 0x33c52e84 Table_map: `test`.`t1` mapped to number 79
# at 823
#160817 10:20:43 server id 1 end_log_pos 865 CRC32 0x77e907a2 Delete_rows: table id 79 flags: STMT_END_F
### DELETE FROM `test`.`t1`
### WHERE
### @1=1 /* INT meta=0 nullable=1 is_null=0 */
### @2='a' /* VARSTRING(30) meta=30 nullable=1 is_null=0 */
# at 865
#160817 10:20:43 server id 1 end_log_pos 896 CRC32 0xb0988385 Xid = 185
COMMIT/*!*/;
DELIMITER ;
# End of log file
ROLLBACK /* added by mysqlbinlog */;
/*!50003 SET COMPLETION_TYPE=@OLD_COMPLETION_TYPE*/;
/*!50530 SET @@SESSION.PSEUDO_SLAVE_MODE=0*/;
对于 STATEMENT 格式的 binlog,所有的 DML 操作都记录在 QUERY_EVENT 中,而对于 ROW 格式的 binlog,所有的 DML 操作都记录在 ROWS_EVENT 中,ROWS_EVENT 分为三种:WRITE_ROWS_EVENT,UPDATE_ROWS_EVENT,DELETE_ROWS_EVENT,分别对应 insert,update 和 delete 操作。
对于 insert 操作,WRITE_ROWS_EVENT 包含了要插入的数据
对于 update 操作,UPDATE_ROWS_EVENT 不仅包含了修改后的数据,还包含了修改前的值。
对于 delete 操作,仅仅需要指定删除的主键(在没有主键的情况下,会给定所有列)
事实上,在 ROW 格式的 binlog 文件中,每个 ROWS_EVENT 事件前都会有一个 TABLE_MAP_EVENT,用于描述表的内部 id 和结构定义。
即便上述两个 insert 操作,一个没有执行 use test 操作,都不影响 TABLE_MAP_EVENT 的内容,这也会导致基于 ROW 格式下的库级别的复制和基于 STATEMENT 格式下库级别的复制的复制规则不一致。
如何在 ROW 格式中输出原生的 DML 语句?
MySQL 实际上提供了一个参数,可以用于输出原生的 DML 语句,但是该语句仅仅是其注释的作用,并不会被应用。
如下所示,
mysql> flush logs;
Query OK, 0 rows affected (0.01 sec)
mysql> set binlog_rows_query_log_events=1;
Query OK, 0 rows affected (0.01 sec)
mysql> insert into t1 values(3,'c');
Query OK, 1 row affected (0.00 sec)
对应的二进制的内容如下:
mysql> show binlog events in 'mysql-bin.000026';
+------------------+-----+-------------+-----------+-------------+---------------------------------------+
| Log_name | Pos | Event_type | Server_id | End_log_pos | Info |
+------------------+-----+-------------+-----------+-------------+---------------------------------------+
| mysql-bin.000026 | 4 | Format_desc | 1 | 120 | Server ver: 5.6.31-log, Binlog ver: 4 |
| mysql-bin.000026 | 120 | Query | 1 | 192 | BEGIN |
| mysql-bin.000026 | 192 | Rows_query | 1 | 244 | # insert into t1 values(3,'c') |
| mysql-bin.000026 | 244 | Table_map | 1 | 292 | table_id: 79 (test.t1) |
| mysql-bin.000026 | 292 | Write_rows | 1 | 334 | table_id: 79 flags: STMT_END_F |
| mysql-bin.000026 | 334 | Xid | 1 | 365 | COMMIT /* xid=189 */ |
+------------------+-----+-------------+-----------+-------------+---------------------------------------+
6 rows in set (0.00 sec)
实际上,MySQL 新增了一个事务类型来输出 ROW 格式中原生的 DML 语句,即 ROWS_QUERY_EVENT。
自此以后,再也不用顾虑 ROW 格式的二进制日志中无法查看原生的 DML 语句了。
本文永久更新链接地址 :http://www.linuxidc.com/Linux/2016-08/134391.htm