Re: Can't drop constraint?

This did fix my problem.  I thought that it was a constraint because
the error message I got said that the action was violating the unique
constraint.  I didn't realize until later that actually meant the
unique constraint on the index,

I'd be interested in the question here, as well.

Carol

On May 6, 2009, at 1:45 AM, Michael Monnerie wrote:

> On Dienstag 05 Mai 2009 Tom Lane wrote:
>> Apparently this is just an index, not a constraint (the difference
>> being that it was made with CREATE INDEX, not ALTER TABLE ADD
>> CONSTRAINT). Try
>
> Is there a performance difference? Or is it just a matter of taste
> which
> one you use? Technically, are they both indices, or is the
> constraint a
> check that's executed on insert/update, but doesn't store the values?
>
> mfg zmi
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