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我有一个包含oracle中的树的表。如何在外键在同一个表上的oracle中添加级联删除
MY_TABLE
node_id
parent_id
当树的根不会有父级时,如何添加级联删除?
现在,对于根目录,父id被设置为-1。当我尝试这一点,我得到以下错误:
Error starting at line 1 in command:
ALTER TABLE regional_defaults_working
add CONSTRAINT regional_defaults_wk_delete
FOREIGN KEY (parent_id)
REFERENCES regional_defaults_working(node_id)
ON DELETE CASCADE
Error report:
SQL Error: ORA-02298: cannot validate (XVTEST.REGIONAL_DEFAULTS_WK_DELETE) - parent keys not found
02298. 00000 - "cannot validate (%s.%s) - parent keys not found"
*Cause: an alter table validating constraint failed because the table has
child records.
哦,当然...在我发现它之后立即发布答案;在发布之前); – testing123 2011-04-07 23:53:12