用mysqlbinlog查看row格式的事件

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xiancai1987 2011-06-14 14:17:41 博主文章分类：mysql

文章标签 mysql 编码 base64 mysqlbinlog row 文章分类 MySQL 数据库

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？