Re: More FK constraint stuff

Applied.  Thanks.


>
> This is mostly the same as an earlier patch I
> didn't hear anything about, but which would
> have broken with the function manager changes
> anyway.
>
> Well, this patch checks that a unique constraint
> of some form (unique or pk) is on the referenced
> columns of an FK constraint and that the columns
> in the referencing table exist at creation time.
> The former is to move closer to SQL compatibility
> and the latter is in answer to a bug report.
> I also added a basic check of this functionality
> to the alter table and foreign key regression
> tests.
>
> Stephan Szabo
> sszabo@bigpanda.com
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