mysql 5.2.3 在触发器内调用的过程出现语法错误

Question

DELIMITER |

CREATE TRIGGER RV1       
after insert on Iscr 
for each row 
call ProcRV1(new.Usere,new.Sub);

create procedure ProcRV1(nUsere varchar(15),nSub varchar(15))

delete from Iscr

where Usere=nUsere && Sub=nSub && Usere=Sub

|

在表 Iscr 上使用此命令，当我尝试插入行时，出现错误 1442 有什么帮助吗？？

谢谢

Answer 1

    DELIMITER |

    create procedure ProcRV1(nUsere varchar(15),nSub varchar(15))
    BEGIN
        delete from Iscr where Usere=nUsere && Sub=nSub && Usere=Sub;
    END
    |

    CREATE TRIGGER RV1       
        after insert on Iscr 
        for each row 
        BEGIN
            call ProcRV1(new.Usere,new.Sub);
        END
    |

    DELIMITER ;

<小时/>

编辑:现在查看您的 SP:

好的，所以您正在尝试在插入行时从当前表中删除行。 MySQL 不允许这样做。但一定有窍门。就像这里做的那样http://crazytoon.com/2008/03/03/mysql-error-1442-hy000-cant-update-table-t1-in-stored-functiontrigger-because-it-is-already-used-by-statement-which-invoked-this-stored-functiontrigger/

引用这个:http://dev.mysql.com/doc/refman/5.0/en/stored-program-restrictions.html

Within a stored function or trigger, it is not permitted to modify a table that is already being used (for reading or writing) by the statement that invoked the function or trigger.