Re: Patch to support SEMI and ANTI join removal

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От	David Rowley
Тема	Re: Patch to support SEMI and ANTI join removal
Дата	10 августа 2014 г. 14:48:30
Msg-id	CAApHDvqRzdxgW5BvzEtVuU0T_f8QDik2MfGHTdc6orTVzg+G4Q@mail.gmail.com обсуждение исходный текст
Ответ на	Patch to support SEMI and ANTI join removal (David Rowley <dgrowleyml@gmail.com>)
Ответы	Re: Patch to support SEMI and ANTI join removal (David Rowley <dgrowleyml@gmail.com>)
Список	pgsql-hackers

Дерево обсуждения

On Tue, Aug 5, 2014 at 10:35 PM, David Rowley <dgrowleyml@gmail.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