If you want deletes to be blocked, then you shouldn't be using ON DELETE
CASCADE; the default behaviour is ON DELETE CONSTRAIN, which seems to be
what you want; it will refuse to delete any rows that are depended on by
rows in other tables.
On Thu, 2009-01-01 at 17:07 -0500, Lola J. Lee Beno
Ian Simpson wrote:
If you want deletes to be blocked, then you shouldn't be using ON DELETE
CASCADE; the default behaviour is ON DELETE CONSTRAIN, which seems to be
what you want; it will refuse to delete any rows that are depended on by
rows in other tables.
Wouldn't that be:
ALTER TABLE
That looks ok to me; I seem to have misremembered the RESTRICT keyword
as CONSTRAIN, since it's been a while since I've had to use it.
Bear in mind that I don't think MySQL has a check to make sure that the
same foreign key does not already exist; I have seen a table that had
the same foreign key
It executes in 0 sec when you run it. It might be in the query cache.
Try it with SQL_NO_CACHE. But even then it might run faster than it
did when it got logged in the slow log, because the table's data might
be in memory and therefore faster to access.
The point is that the slow query log
# Query_time: 0 Lock_time: 0 Rows_sent: 1 Rows_examined: 150
SELECT SUM(COUNTER_VALUE) FROM STO_LIS sl, SCAT_LIS sfl WHERE l.STO_LIS_ID
=sfl.LIS_ID AND sfl.CAT_ID = '-1';
This is what is there in the slow-query log
On 1/2/09, Baron Schwartz ba...@xaprb.com wrote:
It executes in 0 sec when
-Original Message-
From: Lola J. Lee Beno [mailto:l...@his.com]
Sent: Thursday, January 01, 2009 5:08 PM
To: 'MySQL'
Subject: How to Use Cascade Delete Properly
I'm trying to understand how to use cascade delete properly but not sure
if I have this backwards or not. Here's an example:
If you're not going to Cascade Delete you'll need to change ON DELETE CASCADE
clause to ON DELETE SET NULL e.g.
change
FOREIGN KEY(id_b) REFERENCES b(id) ON DELETE CASCADE
TO
FOREIGN KEY(id_b) REFERENCES b(id) ON DELETE SET
NULLhttp://dev.mysql.com/doc/refman/5.0/en/delete.html
Martin
I suspect a bug, honestly. Have you searched bugs.mysql.com? Have
you submitted a bug report?
On Wed, Dec 31, 2008 at 9:01 AM, Olaf Stein
olaf.st...@nationwidechildrens.org wrote:
Hi all,
As my query yesterday did not generate any responses (possibly it was too
long and maybe not well
