MySQL错误代码为err[1442]的解决总结

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MySQL错误代码为err[1442]的解决总结_MySQL

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Jun 01, 2016 pm 01:08 PM

当触发器和存贮过程交互的调用某一个字段的时候会出现这个报错

﹙1﹚ 工具: Navicatfor mysql

﹙2﹚ 错误描述:

1﹚ 在编写考试排名的数据库设计期间,数据库会出现批处理,对该用户不同计算出回答正确数和题目总数的时候,数据库用触发器直接计算出它的正确率

2﹚ 设计完成之后报错为err[1442]

﹙3﹚ 错误解释:
SQLSTATE: HY000 (ER_CANT_UPDATE_USED_TABLE_IN_SF_OR_TRG)消息：由于它已被调用了该存储函数／触发程序的语句使用，不能在存储函数／触发程序中更新表'%s'。

﹙4﹚ 解决过程

1﹚ 删除触发器.

2﹚ 刷新数据库

3﹚ 重新调用存贮过程即可实现

﹙5﹚ 详细解决说明

1﹚ 该部分错误是调用触发器的同时存贮过程也在使用这个字段,故而出现这个错误

2﹚ 这个存贮过程是要执行多个语句的,当第一部分执行完之后肯定会涉及到该表的改动,那么就会立即触发触发器的操作,触发器会使用该字段.但是存贮过程还没有结束,他也在继续执行继续使用该字段,故而产生错误

在处理中建议存贮过程实现的功能一体实现,不建议存贮过程+触发器的实现方式.容易产生该错误,并且在后续变更等方面限制会更大,性能也有所影响

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