Re: Patch to support SEMI and ANTI join removal

From: David Rowley <dgrowleyml(at)gmail(dot)com>
To: PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: Patch to support SEMI and ANTI join removal
Date: 2014-08-10 11:48:24
Message-ID: CAApHDvqRzdxgW5BvzEtVuU0T_f8QDik2MfGHTdc6orTVzg+G4Q@mail.gmail.com
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On Tue, Aug 5, 2014 at 10:35 PM, David Rowley <dgrowleyml(at)gmail(dot)com> wrote:

>
> The patch (attached) is also now able to detect when a NOT EXISTS clause
> cannot produce any records at all.
>
>
I've attached an updated version of the patch which fixes up some
incorrect logic in the foreign key matching code, plus various comment
improvements.

Regards

David Rowley

Attachment Content-Type Size
semianti_join_removal_f92541e_2014-08-10.patch application/octet-stream 55.5 KB

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