现象:
mysql 5.6
主从报下面的错误:
mysql> show slave status \G
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: ****
Master_User: ucloudbackup
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000003
Read_Master_Log_Pos: 43347
Relay_Log_File: mysql-relay.000002
Relay_Log_Pos: 1810
Relay_Master_Log_File: mysql-bin.000003
Slave_IO_Running: Yes
Slave_SQL_Running: No
Replicate_Do_DB:
Replicate_Ignore_DB:
Replicate_Do_Table:
Replicate_Ignore_Table:
Replicate_Wild_Do_Table:
Replicate_Wild_Ignore_Table:
Last_Errno: 1270
Last_Error: Error 'Illegal mix of collations (utf8_general_ci,COERCIBLE), (latin1_swedish_ci,IMPLICIT), (utf8_general_ci,COERCIBLE) for operation 'concat'' on query. Default database: 'test'. Query: 'INSERT INTO test (addressType, addressName) VALUES ('sh_jincheng', concat('上海市', NAME_CONST('i',180),'室'))'
Skip_Counter: 0
Exec_Master_Log_Pos: 1647
Relay_Log_Space: 43710
Until_Condition: None
Until_Log_File:
Until_Log_Pos: 0
Master_SSL_Allowed: No
Master_SSL_CA_File:
Master_SSL_CA_Path:
Master_SSL_Cert:
Master_SSL_Cipher:
Master_SSL_Key:
Seconds_Behind_Master: NULL
Master_SSL_Verify_Server_Cert: No
Last_IO_Errno: 0
Last_IO_Error:
Last_SQL_Errno: 1270
Last_SQL_Error: Error 'Illegal mix of collations (utf8_general_ci,COERCIBLE), (latin1_swedish_ci,IMPLICIT), (utf8_general_ci,COERCIBLE) for operation 'concat'' on query. Default database: 'test'. Query: 'INSERT INTO test (addressType, addressName) VALUES ('sh_jincheng', concat('上海市', NAME_CONST('i',180),'室'))'
Replicate_Ignore_Server_Ids:
Master_Server_Id: 169052043
Master_UUID: a2b11ba1-1552-11e7-a33b-52540059bf44
Master_Info_File: /opt/udb/instance/mysql-5.6/2f2a1aea-b636-48b7-9006-a1af025d90d0/data/master.info
SQL_Delay: 0
SQL_Remaining_Delay: NULL
Slave_SQL_Running_State:
Master_Retry_Count: 86400
Master_Bind:
Last_IO_Error_Timestamp:
Last_SQL_Error_Timestamp: 170330 22:19:10
Master_SSL_Crl:
Master_SSL_Crlpath:
Retrieved_Gtid_Set: a2b11ba1-1552-11e7-a33b-52540059bf44:1-105
Executed_Gtid_Set: a2b11ba1-1552-11e7-a33b-52540059bf44:1-5
Auto_Position: 0
1 row in set (0.00 sec)
原来有一个笔记 ,里面写到:
ERROR 1267 concat name_const函数
今天朋友他们有一个错误,最后是因为:
MySQL> select concat('¥',NAME_CONST('tttt',1234));
ERROR 1267 (HY000): Illegal mix of collations (utf8_general_ci,COERCIBLE) and (latin1_swedish_ci,IMPLICIT) for operation 'concat'
这个类似的错误原来也见过:那是因为两表关联时,关联的字段是有索引的,但是索引不是按的相同的COLLATION,所以出现的问题,修改为一样之后,即可正常。
又试了一下
MySQL> select concat('a',NAME_CONST('tttt',1234));
+-------------------------------------+
| concat('a',NAME_CONST('tttt',1234)) |
+-------------------------------------+
| a1234 |
+-------------------------------------+
1 row in set (0.00 sec)
MySQL> select concat('工',NAME_CONST('tttt',1234));
ERROR 1267 (HY000): Illegal mix of collations (utf8_general_ci,COERCIBLE) and (latin1_swedish_ci,IMPLICIT) for operation 'concat'
从这里看,用汉字的类的就不正常。
MySQL> select COLLATION('工');
+------------------+
| COLLATION('工') |
+------------------+
| utf8_general_ci |
+------------------+
1 row in set (0.00 sec)
MySQL> select COLLATION('a');
+-----------------+
| COLLATION('a') |
+-----------------+
| utf8_general_ci |
+-----------------+
1 row in set (0.00 sec)
MySQL> select COLLATION('¥');
+------------------+
| COLLATION('¥') |
+------------------+
| utf8_general_ci |
+------------------+
1 row in set (0.00 sec)
MySQL> select COLLATION(NAME_CONST('tttt',1234));
+------------------------------------+
| COLLATION(NAME_CONST('tttt',1234)) |
+------------------------------------+
| binary |
+------------------------------------+
1 row in set (0.00 sec)
有点晕了,前前看 'a','工','¥' 都是一样的, 汉字的不行。
看看这个函数:
This function is for internal use only,可以写成别的方式
比如这里的
MySQL> select NAME_CONST('tttt',1234);
+------+
| tttt |
+------+
| 1234 |
+------+
1 row in set (0.00 sec)
可以写为:
MySQL> select 1234 as 'tttt';
+------+
| tttt |
+------+
| 1234 |
+------+
1 row in set (0.00 sec)
一样的效果 。
另:
MySQL> select concat('¥',NAME_CONST('tttt','1234'));
+-----------------------------------------+
| concat('¥',NAME_CONST('tttt','1234')) |
+-----------------------------------------+
| ¥1234 |
+-----------------------------------------+
这样也不会报错:
不知道开发到底是什么 意思 ,和开发商量 才好最后约定怎么搞。
当时朋友遇到这个问题,最后他们也没有反馈这个是怎么回事,我也就忘记了这个事情,这次是自己遇到这个问题,并且分析问题时较之前也多了一些方法,这次就从源代码看下这个问题。
看了几分钟代码,有一个怀疑点是 存储过程的调用引起的这个问题(是在subst_spvars函数中完成的,这里就不列出来代码了),就去主库查看,果然有这个procedure,
重现方法:
在主库上建表:
主库Binlog_format=mixed;
CREATE TABLE `test` (
`addressId` int(11) NOT NULL AUTO_INCREMENT,
`addressType` varchar(30) NOT NULL,
`addressName` varchar(300) NOT NULL,
`usable` tinyint(4) NOT NULL DEFAULT '1',
PRIMARY KEY (`addressId`)
) ENGINE=InnoDB AUTO_INCREMENT=202 DEFAULT CHARSET=utf8mb4
在主库上建procedure:
delimiter //
CREATE PROCEDURE `test_insert`()
BEGIN
DECLARE i INT DEFAULT 180;# can not be 0
WHILE i<400
DO
INSERT INTO test (addressType, addressName) VALUES ('sh_jincheng', concat('上海市',i,'室'));
SET i=i+1;
END WHILE ;
commit;
END
//
delimiter ;
调用procedure:
mysql> call test_insert();
Query OK, 0 rows affected (0.21 sec)
从库上就会报上面的错.
解决方法:
可以把 binlog_format=row 解决这个问题
声明:源码新手,仅代表个人意见,非权威,如果误导看官,见谅。
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