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From: Tom Lane <tgl@sss.pgh.pa.us>
To: Vik Fearing <vik@postgresfriends.org>
cc: pgsql-bugs <pgsql-bugs@postgresql.org>
Subject: Re: Wrong result with constant quals
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Comments: In-reply-to Vik Fearing <vik@postgresfriends.org>
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Vik Fearing <vik@postgresfriends.org> writes:
> I allowed for this by saying it could be a single group with no rows if 
> you preferred to look at it that way.

That is exactly what the standard says.

> This does not explain why the WHERE FALSE is being ignored and producing 
> rows.

It's not ignored, but it applies to the pre-grouping rows, of which
there aren't any to remove.  But there's still a group.

			regards, tom lane