Thread: ON DELETE CASCADE question

ON DELETE CASCADE question

From

Wei Weng

Date:

14 June 2002, 12:40:43

Does ON DELETE CASCADE attribute you specify in CREATE TABLE statement
actually create triggers for every foreign key it refers to?

Thanks!


-- 
Wei Weng
Network Software Engineer
KenCast Inc.

Re: ON DELETE CASCADE question

From

"Josh Berkus"

Date:

14 June 2002, 15:06:36

Wei,

> Does ON DELETE CASCADE attribute you specify in CREATE TABLE
> statement
> actually create triggers for every foreign key it refers to?
>

Yes.  Two triggers for each key, I think.

-Josh

Re: ON DELETE CASCADE question

From

Jan Wieck

Date:

14 June 2002, 16:31:56

Josh Berkus wrote:
> 
> Wei,
> 
> > Does ON DELETE CASCADE attribute you specify in CREATE TABLE
> > statement
> > actually create triggers for every foreign key it refers to?
> >
> 
> Yes.  Two triggers for each key, I think.
   Three, one for INSERT OR UPDATE on the FK table, one   for UPDATE on the PK table and one for DELETE on PK.

Jan

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