So I have table foo
and I would like to delete other foo
rows when trigger t_foo
fires:
CREATE OR REPLACE TRIGGER "t_foo" AFTER INSERT OR DELETE OR UPDATE ON foo
/*delete some other records from foo that are not :NEW.* or :OLD.* \*
How would I go about doing this without getting a ORA-04091:
table name is mutating, trigger/function may not see it. Is this even possible?
为什么不在存储过程中做到这一点呢?在存储过程中,您可以在事务中包装插入和删除操作,并且可以清楚地记录这种副作用行为?
请参阅Tom Kyte关于该主题的权威文章 。
This basically implies you have interdependent rows in your table, possibly a hierarchical structure with a self-reference from a column to the primary key. Did you think about ON DELETE CASCADE
?
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