Re: orphaned trigger

On Wed, 16 May 2001, Jonathan Ellis wrote:

> This is in 7.1.1:
>
> I was playing around with a table called user_comments and then dropped it.
> One of its columns referenced the user_id column of another table, users.
> Now whenever I try to update users, I get results like this:
> bf2-new=# update users set last_visit=sysdate() where user_id=4; ERROR:
> Relation 'user_comments' does not exist
>
> Somehow a constraint trigger that should have been dropped wasn't.
>
> I looked at the dump file and this is the only reference to user_comments:
>
> CREATE CONSTRAINT TRIGGER "<unnamed>" AFTER UPDATE ON "users" NOT DEFERRABLE
> INITIALLY IMMEDIATE FOR EACH ROW EXECUTE PROCEDURE "RI_FKey_noaction_upd"
> ('<unnamed>', 'user_comments', 'users', 'UNSPECIFIED', 'user_id',
> 'user_id');
>
> but I am not out of the woods here because it won't let me drop it:
>
> bf2-new=# drop trigger RI_ConstraintTrigger_44349 on users; ERROR:
> DropTrigger: there is no trigger ri_constrainttrigger_44349 on relation
> users
>
> It's in pg_trigger all right -- and with tgrelid = (select relfilenode from
> pg_class where relname = 'users') -- but it won't drop.  Would manually
> removing it from pg_trigger cause Bad Things to happen?

Yes, and you'll need to double quote the trigger name.
try
drop trigger "RI_ConstraintTrigger_44349" on users;

How did you drop the table?  Did you reload a dump file (like the one that
referenced it)?