Re: [GENERAL] ALTER TABLE -- how to add ON DELETE CASCADE?
On Mar 7, 2006, at 4:42 PM, [EMAIL PROTECTED] wrote: On Tue, Mar 07, 2006 at 05:36:37PM -0500, Tom Lane wrote: [EMAIL PROTECTED] writes: ALTER TABLE A COLUMN AA ADD CONSTRAINT DELETE ON CASCADE You're missing the specification of the foreign key, not to mention spelling the CASCADE clause backwards. Try ALTER TABLE A ADD FOREIGN KEY(AA) REFERENCES B(BB) ON DELETE CASCADE Got it right in the Subject: and my many attempts, just not in the body :-) The column already had the foreign key, I never thought to add it again. I was only thinking of modifying the minimum necessary. Yeah, unfortunately there's no support for modifying constraints. -- Jim C. Nasby, Sr. Engineering Consultant [EMAIL PROTECTED] Pervasive Software http://pervasive.comwork: 512-231-6117 vcard: http://jim.nasby.net/pervasive.vcf cell: 512-569-9461 ---(end of broadcast)--- TIP 3: Have you checked our extensive FAQ? http://www.postgresql.org/docs/faq
Re: [GENERAL] ALTER TABLE -- how to add ON DELETE CASCADE?
On Wed, Mar 08, 2006 at 04:06:55PM -0600, Jim Nasby wrote: On Mar 7, 2006, at 4:42 PM, [EMAIL PROTECTED] wrote: On Tue, Mar 07, 2006 at 05:36:37PM -0500, Tom Lane wrote: [EMAIL PROTECTED] writes: ALTER TABLE A COLUMN AA ADD CONSTRAINT DELETE ON CASCADE You're missing the specification of the foreign key, not to mention spelling the CASCADE clause backwards. Try ALTER TABLE A ADD FOREIGN KEY(AA) REFERENCES B(BB) ON DELETE CASCADE Got it right in the Subject: and my many attempts, just not in the body :-) The column already had the foreign key, I never thought to add it again. I was only thinking of modifying the minimum necessary. Yeah, unfortunately there's no support for modifying constraints. Well, except in the sense of dropping and re-creating them inside a transaction :) Cheers, D (transactional DDL is fantastic :) -- David Fetter [EMAIL PROTECTED] http://fetter.org/ phone: +1 415 235 3778 Remember to vote! ---(end of broadcast)--- TIP 1: if posting/reading through Usenet, please send an appropriate subscribe-nomail command to [EMAIL PROTECTED] so that your message can get through to the mailing list cleanly
[GENERAL] ALTER TABLE -- how to add ON DELETE CASCADE?
I have table A with a column AA which references table B's primary key BB, and I want to alter column AA to delete on cascade. ALTER TABLE A COLUMN AA ADD CONSTRAINT DELETE ON CASCADE is what I tried with a zillion variations, all reporting syntax errors. \h alter table seems to be missing any way to add a constraint to a column. Or maybe this isn't a constraint ... does seem like maybe the wrong name, but I can't think what else it would be called, and the other choices shown with \h seem even less likely. Your assiatnce is much appreciated. I would gladly send you some Oreos or Ginger Nuts :-) -- ... _._. ._ ._. . _._. ._. ___ .__ ._. . .__. ._ .. ._. Felix Finch: scarecrow repairman rocket surgeon / [EMAIL PROTECTED] GPG = E987 4493 C860 246C 3B1E 6477 7838 76E9 182E 8151 ITAR license #4933 I've found a solution to Fermat's Last Theorem but I see I've run out of room o ---(end of broadcast)--- TIP 2: Don't 'kill -9' the postmaster
Re: [GENERAL] ALTER TABLE -- how to add ON DELETE CASCADE?
[EMAIL PROTECTED] writes: ALTER TABLE A COLUMN AA ADD CONSTRAINT DELETE ON CASCADE You're missing the specification of the foreign key, not to mention spelling the CASCADE clause backwards. Try ALTER TABLE A ADD FOREIGN KEY(AA) REFERENCES B(BB) ON DELETE CASCADE \h alter table seems to be missing any way to add a constraint to a column. It's there, though you have to look to \h create table to see the alternatives for table_constraint. regards, tom lane ---(end of broadcast)--- TIP 1: if posting/reading through Usenet, please send an appropriate subscribe-nomail command to [EMAIL PROTECTED] so that your message can get through to the mailing list cleanly
Re: [GENERAL] ALTER TABLE -- how to add ON DELETE CASCADE?
On Tue, Mar 07, 2006 at 05:36:37PM -0500, Tom Lane wrote: [EMAIL PROTECTED] writes: ALTER TABLE A COLUMN AA ADD CONSTRAINT DELETE ON CASCADE You're missing the specification of the foreign key, not to mention spelling the CASCADE clause backwards. Try ALTER TABLE A ADD FOREIGN KEY(AA) REFERENCES B(BB) ON DELETE CASCADE Got it right in the Subject: and my many attempts, just not in the body :-) The column already had the foreign key, I never thought to add it again. I was only thinking of modifying the minimum necessary. Thanks. -- ... _._. ._ ._. . _._. ._. ___ .__ ._. . .__. ._ .. ._. Felix Finch: scarecrow repairman rocket surgeon / [EMAIL PROTECTED] GPG = E987 4493 C860 246C 3B1E 6477 7838 76E9 182E 8151 ITAR license #4933 I've found a solution to Fermat's Last Theorem but I see I've run out of room o ---(end of broadcast)--- TIP 6: explain analyze is your friend
