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mysql主从关于函数过程同步问题_MySQL

Jun 01, 2016 pm 01:46 PM
function mysql

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发现mysql主从同上步 对于函数过程总是出错
 
MySQL创建函数问题分析:
根据系统提示,导致该错误的原因可能是一个安全设置方面的配置,查手册log_bin_trust_function_creators参数缺省0,是不 允许function的同步的。
一般我们在配置repliaction的时候,都忘记关注这个参数,这样在master更新funtion后,slave就会报告错误,然后slave stoped。
MySQL创建函数问题处理过程:
登陆mysql数据库
> set global log_bin_trust_function_creators = 1;
> start slave;
跟踪mysql的启动日志,slave正常运行,问题解决。
持续跟踪,经过一个晚上,bin-relay-log的数据全部同步完毕。 直接在my.cnf里面添加
log_bin_trust_function_creators = 1
 
 
========================================================================
创建function时
出错信息:
ERROR 1418 (HY000): This function has none of DETERMINISTIC, NO SQL, or READS SQL DATA in its declaration and binary logging is enabled (you *might* want to use the less safe log_bin_trust_function_creators variable)
 
原因:
这是我们开启了bin-log, 我们就必须指定我们的函数是否是
1 DETERMINISTIC 不确定的
2 NO SQL 没有SQl语句,当然也不会修改数据
3 READS SQL DATA 只是读取数据,当然也不会修改数据
4 MODIFIES SQL DATA 要修改数据
5 CONTAINS SQL 包含了SQL语句

其中在function里面,只有 DETERMINISTIC, NO SQL 和 READS SQL DATA 被支持。如果我们开启了 bin-log, 我们就必须为我们的function指定一个参数。
 
解决方法:
SQL code
mysql>show variables like '%func%';
+---------------------------------+-------+
|Variable_name |Value|
+---------------------------------+-------+
|log_bin_trust_function_creators|OFF |
+---------------------------------+-------+
1 row in set (0.00sec)
mysql>set global log_bin_trust_function_creators=1;
Query OK,0 rows affected (0.00sec)
mysql>show variables like '%func%';
+---------------------------------+-------+
|Variable_name |Value|
+---------------------------------+-------+
|log_bin_trust_function_creators|ON |
+---------------------------------+-------+
1 row in set (0.00sec)
mysql>
 
 
试过了,这个方法很有效的。

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