MySQL replication illegal mix of collations
MySQL replication case 一则
转载：http://www.vmcd.org/2013/09/mysql-replication-case-%E4%B8%80%E5%88%99/
Posted by admin on September 10th, 2013
最近同事处理了一则mysql复制错误.发出来参考下
MYSQL同步出错，报错信息如下：
Last_Errno: 1267
Last_Error: Error 'Illegal mix of collations (utf8_general_ci,COERCIBLE) and (latin1_swedish_ci,IMPLICIT) for operation 'concat'' on query. Default database: 'inshop_app'. Query: 'INSERT INTO inshop_app.app_sms_order_info (ORDER_CODE, ORDER_TIME, ORDER_AMOUNT, ORDER_CONTENT, BUY_NUM, ORDER_STATUS, MERCHANT_ID, CREATE_TIME, UPDATE_TIME, APP_TYPE, pay_time, remark)
VALUES( NAME_CONST('my_order_code',_utf8'SBY130830010708_F0' COLLATE 'utf8_general_ci'),NOW(),'0','1次', NAME_CONST('my_sms_num',1125000),'1', NAME_CONST('my_merchant_id',10708),NOW(),NOW(),'2',NOW(),CONCAT ('钻展赠送:', NAME_CONST('my_sms_num',1125000)))'
|
出错原因分析：
此SQL在Master上执行时是这样的
INSERT INTO inshop_app.app_sms_order_info (ORDER_CODE, ORDER_TIME, ORDER_AMOUNT, ORDER_CONTENT, BUY_NUM, ORDER_STATUS, MERCHANT_ID, CREATE_TIME, UPDATE_TIME, APP_TYPE, pay_time, remark)
VALUES( 'SBY130830010708_F0',NOW(),'0','1次', 1125000,'1', 10708,NOW(),NOW(),'2',NOW(),CONCAT ('钻展赠送:', 1125000))
|
该SQL本身是没问题的，执行成功，但是MYSQL在记录BINLOG的时候，会对常量用NAME_CONST()函数进行“标识”
同步的报错就出现在这个地方
CONCAT ('钻展赠送:', NAME_CONST('my_sms_num',1125000))
|
其中，’钻展赠送:’是UTF8字符集，NAME_CONST(‘my_sms_num’,1125000)得到的数值型常量被自动转型为LATIN1字符集，外层的CONCAT()函数不支持二种不同字符集进行连接，于是报错
以下测试可验证此分析：
无NAME_CONST()函数标识常量时，即如同在Master上执行时，成功
09:29:06 inshop_app> select concat('钻展赠送',123);
+----------------------------+
| concat('钻展赠送',123) |
+----------------------------+
| 钻展赠送123 |
+----------------------------+
1 row in set (0.00 sec)
|
有NAME_CONST()函数标识常量时，即如同在Slave上执行时，失败
09:25:17 inshop_app> select concat('钻展赠送',name_const('colname',123));
ERROR 1267 (HY000): Illegal mix of collations (utf8_general_ci,COERCIBLE) and (latin1_swedish_ci,IMPLICIT) for operation 'concat'
|
报错与同步是一样的错误
什么情况下MySQL会自动加上NAME_CONST函数
测试1： 直接insert
11:27:32 test> insert into lengzhenguo_mha(c3,c4) values(1,'a'),('2','b');
Query OK, 2 rows affected (0.00 sec)
Records: 2 Duplicates: 0 Warnings: 0
|
BINLOG中的内容
#130909 11:28:35 server id 2009 end_log_pos 469 Query thread_id=10 exec_time=0 error_code=0
SET TIMESTAMP=1378697315/*!*/;
insert into lengzhenguo_mha(c3,c4) values(1,'a'),('2','b')
/*!*/;
|
测试2： 简单的存储过程
13:16:42 test> create procedure p_test()
-> begin
-> insert into lengzhenguo_mha(c3,c4) values(10,'abc'),('20','xyz');
-> commit;
-> end
-> $
Query OK, 0 rows affected (0.00 sec)
13:17:38 test> call p_test();
Query OK, 0 rows affected (0.00 sec)
|
BINLOG中的内容
#130909 13:18:21 server id 2009 end_log_pos 328 Query thread_id=12 exec_time=0 error_code=0
use `test`/*!*/;
SET TIMESTAMP=1378703901/*!*/;
insert into lengzhenguo_mha(c3,c4) values(10,'abc'),('20','xyz')
/*!*/;
|
测试3：带参数的存储过程 类似bind value
13:22:43 test> CREATE procedure p_test_2 (i bigint, j varchar(30))
-> begin
-> insert into lengzhenguo_mha(c3,c4) values(i,j);
-> commit;
-> end
-> $
Query OK, 0 rows affected (0.00 sec)
13:23:16 test> call p_test_2(100,'dba');
Query OK, 0 rows affected (0.00 sec)
13:25:10 test> call p_test_2('500','dba');
Query OK, 0 rows affected (0.00 sec)
|
BINLOG中的内容
#130909 13:23:32 server id 2009 end_log_pos 612 Query thread_id=12 exec_time=0 error_code=0
SET TIMESTAMP=1378704212/*!*/;
insert into lengzhenguo_mha(c3,c4) values( NAME_CONST('i',100), NAME_CONST('j',_latin1'dba' COLLATE 'latin1_swedish_ci'))
/*!*/;
#130909 13:25:15 server id 2009 end_log_pos 1226 Query thread_id=12 exec_time=0 error_code=0
SET TIMESTAMP=1378704315/*!*/;
insert into lengzhenguo_mha(c3,c4) values( NAME_CONST('i',500), NAME_CONST('j',_latin1'dba' COLLATE 'latin1_swedish_ci'))
/*!*/;
|
注意：’500′在写入Binlog时，已经被转换成数值型了
目前已知的解决方法：
方法1：不要直接使用数值，直接给予字符串，建议使用此方法
09:25:27 inshop_app> select concat('钻展赠送',name_const('colname','123'));
+----------------------------------------------------+
| concat('钻展赠送',name_const('colname','123')) |
+----------------------------------------------------+
| 钻展赠送123 |
+----------------------------------------------------+
1 row in set (0.00 sec)
|
注意：这里的123加引号，字符串~
方法2：先进行类型转换
09:56:32 inshop_app> select concat('钻展赠送',convert(name_const('colname',123) using utf8));
+----------------------------------------------------------------------+
| concat('钻展赠送',convert(name_const('colname',123) using utf8)) |
+----------------------------------------------------------------------+
| 钻展赠送123 |
+----------------------------------------------------------------------+
1 row in set (0.00 sec)
|
转载于:https://www.cnblogs.com/jackhub/p/3909539.html
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