Re: Re: Does PostgreSQL support EXISTS?

From: Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us>
To: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: Michael Meskes <meskes(at)postgresql(dot)org>, pgsql-general(at)postgresql(dot)org
Subject: Re: Re: Does PostgreSQL support EXISTS?
Date: 2001-06-13 16:23:29
Message-ID: 200106131623.f5DGNTU12764@candle.pha.pa.us
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> Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> writes:
> >> Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> writes:
> > Are we anywhere with optimizing IN to EXISTS? I didn't think there was
> > any work being done in that area.
>
> > Doing that would elimate the need for query sources, at least for a
> > while.
>
> Uh ... what? I don't see a connection.

Are we talking about converting IN to EXISTS for performance reasons? I
though having query tree sources was required for this?

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