Mysql:在一个流程中 INSERT 上的过程 + 触发器

Question

1) 我有一些表程序。

2)我有程序在此表中进行更改:

    CREATE PROCEDURE update_lessons_ord (IN courseId INT)
    BEGIN
            SET @ord :=0;
                UPDATE programs mcp_1
                    INNER JOIN programs mcp_2 ON mcp_1.id = mcp_2.id
                        SET mcp_1.ord = ( @ord := @ord +1 )
                            WHERE mcp_2.course_id = courseId;
    END;

3)我有第一个TRIGGER(删除):

    CREATE TRIGGER `update_lessons_ord_after_delete` AFTER DELETE ON `programs`
    FOR EACH ROW
    BEGIN
        CALL update_lessons_ord(OLD.course_id);
    END;

一切正常!

4)我有第二个触发器(插入):

    CREATE TRIGGER `update_lessons_ord_after_insert` AFTER INSERT ON `programs`
    FOR EACH ROW
    BEGIN
        CALL update_lessons_ord(NEW.course_id);
    END;

它工作错误:“无法更新存储函数/触发器中的表，因为它已被调用此存储函数/触发器的语句使用”。

在这种情况下我该如何使用我的PROCEDURE？

Answer 1

这是不可能的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