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Re: Bug #529: UPDATE fails after an index is changed

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: paul(at)cnt(dot)org, pgsql-bugs(at)postgresql(dot)org
Subject: Re: Bug #529: UPDATE fails after an index is changed
Date: 2001-12-04 01:30:56
Message-ID: 20479.1007429456@sss.pgh.pa.us (view raw or flat)
Thread:
Lists: pgsql-bugs
pgsql-bugs(at)postgresql(dot)org writes:
> I had to drop and re-create an index on a table for a large insert. Then I needed to run an UPDATE on a different table that gets its values from the first table. UPDATE fails with this error message: 
> 'ERROR:  Index 6708054 does not exist'.

What do you mean by "gets its values"?  Is there a referential integrity
check between the two tables, or perhaps a trigger that examines the
other table?

If it's a trigger, the problem is probably due to plpgsql caching query
plans.  This is a known problem that will be fixed someday (it's not
that easy to fix without giving up a lot of performance).  In the
meantime, just starting a fresh backend session should make the problem
go away.

			regards, tom lane

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