用mysqlbinlog查看row格式的事件

原文地址:http://denniswwh.itpub.net/post/15174/490752

MySQL 5.1开始，binlog支持row-based的格式，默认情况下只能看到一些经过base-64编码的信息，如

DELIMITER /*!*/;

# at 7493962

#090827 5:25:03 server id 1 end_log_pos 0 Start: binlog v 4, server v 5.1.26-rc-community-log created 090827 5:25:03

BINLOG '

L6iVSg8BAAAAZgAAAAAAAAAAAAQANS4xLjI2LXJjLWNvbW11bml0eS1sb2cAAAAAAAAAAAAAAAAA

AAAAAAAAAAAAAAAAAAAAAAAAEzgNAAgAEgAEBAQEEgAAUwAEGggAAAAICAgC

'/*!*/;

# at 7493962

# at 7494009

#090827 13:20:40 server id 1 end_log_pos 7494009 Table_map: `test`.`test1` mapped to number 96991

#090827 13:20:40 server id 1 end_log_pos 7494045 Write_rows: table id 96991 flags: STMT_END_F

BINLOG '

qBeWShMBAAAALwAAAHlZcgAAAN96AQAAAAAABHRlc3QABXRlc3QxAAIDDwI8AAM=

qBeWShcBAAAAJAAAAJ1ZcgAQAN96AQAAAAEAAv/8AwAAAAEz

'/*!*/;

# at 7494045

#090827 13:20:40 server id 1 end_log_pos 7494072 Xid = 2525562

COMMIT/*!*/;

DELIMITER ;

# End of log file
这里只能看到`test`.`test1`表做了改动，但具体改了什么，就不知道了，那么怎样才能看到到底改了什么呢？从MySQL 5.1.28开始，mysqlbinlog多了个参数--verbose(或-v)，将改动生成带注释的语句，如果使用两次这个参数(如-v -v)，会生成字段的类型、长度、是否为null等属性信息。如下：

mysqlbinlog -v -v mysql-bin.001912

DELIMITER /*!*/;

# at 7493962

#090827 5:25:03 server id 1 end_log_pos 0 Start: binlog v 4, server v 5.1.26-rc-community-log created 090827 5:25:03

BINLOG '

L6iVSg8BAAAAZgAAAAAAAAAAAAQANS4xLjI2LXJjLWNvbW11bml0eS1sb2cAAAAAAAAAAAAAAAAA

AAAAAAAAAAAAAAAAAAAAAAAAEzgNAAgAEgAEBAQEEgAAUwAEGggAAAAICAgC

'/*!*/;

# at 7493962

# at 7494009

#090827 13:20:40 server id 1 end_log_pos 7494009 Table_map: `test`.`test1` mapped to number 96991

#090827 13:20:40 server id 1 end_log_pos 7494045 Write_rows: table id 96991 flags: STMT_END_F

BINLOG '

qBeWShMBAAAALwAAAHlZcgAAAN96AQAAAAAABHRlc3QABXRlc3QxAAIDDwI8AAM=

qBeWShcBAAAAJAAAAJ1ZcgAQAN96AQAAAAEAAv/8AwAAAAEz

'/*!*/;

### INSERT INTO test.test1

### SET

### @1=3 /* INT meta=0 nullable=1 is_null=0 */

### @2='3' /* VARSTRING(60) meta=60 nullable=1 is_null=0 */

# at 7494045

#090827 13:20:40 server id 1 end_log_pos 7494072 Xid = 2525562

COMMIT/*!*/;

DELIMITER ;

# End of log file
这时能看懂了吧？但还有个问题，BINLOG开头的那些信息还是会显示出来，很难看，能不能去掉呢？答案是肯定的，加--base64-output=DECODE-ROWS参数。如下
mysqlbinlog -v -v --base64-output=DECODE-ROWS mysql-bin.001912

DELIMITER /*!*/;

# at 7493962

#090827 5:25:03 server id 1 end_log_pos 0 Start: binlog v 4, server v 5.1.26-rc-community-log created 090827 5:25:03

# at 7493962

# at 7494009

#090827 13:20:40 server id 1 end_log_pos 7494009 Table_map: `test`.`test1` mapped to number 96991

#090827 13:20:40 server id 1 end_log_pos 7494045 Write_rows: table id 96991 flags: STMT_END_F

### INSERT INTO test.test1

### SET

### @1=3 /* INT meta=0 nullable=1 is_null=0 */

### @2='3' /* VARSTRING(60) meta=60 nullable=1 is_null=0 */

# at 7494045

#090827 13:20:40 server id 1 end_log_pos 7494072 Xid = 2525562

COMMIT/*!*/;

DELIMITER ;

# End of log file
这样看起来清晰多了吧？