標籤:style http color 使用 os io for ar
MySQL replication case 一則
轉載:http://www.vmcd.org/2013/09/mysql-replication-case-%E4%B8%80%E5%88%99/
Posted by admin on September 10th, 2013
最近同事處理了一則mysql複製錯誤.發出來參考下
MYSQL同步出錯,報錯資訊如下:
?
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 (‘鑽展贈送:‘, NAME_CONST(‘my_sms_num‘,1125000)))‘ |
出錯原因分析:
此SQL在Master上執行時是這樣的
?
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 (‘鑽展贈送:‘, 1125000)) |
該SQL本身是沒問題的,執行成功,但是MYSQL在記錄BINLOG的時候,會對常量用NAME_CONST()函數進行“標識”
同步的報錯就出現在這個地方
?
CONCAT (‘鑽展贈送:‘, NAME_CONST(‘my_sms_num‘,1125000)) |
其中,’鑽展贈送:’是UTF8字元集,NAME_CONST(‘my_sms_num’,1125000)得到的數值型常量被自動轉型為LATIN1字元集,外層的CONCAT()函數不支援二種不同字元集進行串連,於是報錯
以下測試可驗證此分析:
無NAME_CONST()函數標識常量時,即如同在Master上執行時,成功
?
09:29:06 inshop_app> select concat(‘鑽展贈送‘,123); +----------------------------+ | concat(‘鑽展贈送‘,123) | +----------------------------+ | 鑽展贈送123 | +----------------------------+ 1 row in set (0.00 sec) |
有NAME_CONST()函數標識常量時,即如同在Slave上執行時,失敗
?
09:25:17 inshop_app> select concat(‘鑽展贈送‘,name_const(‘colname‘,123)); ERROR 1267 (HY000): Illegal mix of collations (utf8_general_ci,COERCIBLE) and (latin1_swedish_ci,IMPLICIT) for operation ‘concat‘ |
報錯與同步是一樣的錯誤
什麼情況下MySQL會自動加上NAME_CONST函數
測試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中的內容
?
#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‘) /*!*/; |
測試2: 簡單的預存程序
?
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中的內容
?
#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‘) /*!*/; |
測試3:帶參數的預存程序 類似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中的內容
#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′在寫入Binlog時,已經被轉換成數值型了
目前已知的解決方案:
方法1:不要直接使用數值,直接給予字串,建議使用此方法
?
09:25:27 inshop_app> select concat(‘鑽展贈送‘,name_const(‘colname‘,‘123‘)); +----------------------------------------------------+ | concat(‘鑽展贈送‘,name_const(‘colname‘,‘123‘)) | +----------------------------------------------------+ | 鑽展贈送123 | +----------------------------------------------------+ 1 row in set (0.00 sec) |
注意:這裡的123加引號,字串~
方法2:先進行類型轉換
?
09:56:32 inshop_app> select concat(‘鑽展贈送‘,convert(name_const(‘colname‘,123) using utf8)); +----------------------------------------------------------------------+ | concat(‘鑽展贈送‘,convert(name_const(‘colname‘,123) using utf8)) | +----------------------------------------------------------------------+ | 鑽展贈送123 | +----------------------------------------------------------------------+ 1 row in set (0.00 sec) |