Re: Avoid needless copy in nodeMaterial

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От Bruce Momjian
Тема Re: Avoid needless copy in nodeMaterial
Дата
Msg-id 200711042236.lA4MamY05599@momjian.us
обсуждение исходный текст
Ответ на Avoid needless copy in nodeMaterial  (Neil Conway <neilc@samurai.com>)
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This has been saved for the 8.4 release:

    http://momjian.postgresql.org/cgi-bin/pgpatches_hold

---------------------------------------------------------------------------

Neil Conway wrote:
> Attached is a patch that avoids a needless copy of the result tuple in
> nodeMaterial, in the case that we don't have a previously-materialized
> tuple to return. We can just return the TTS produced by executing our
> child node, rather than returning a copy of it.
>
> I didn't bother pulling the MinimalTuple out of "outerslot" and stuffing
> it back into the nodeMaterial's result slot, as AFAICS that is not
> necessary. Although I suppose you could make a cleanliness argument that
> that would be worth doing instead.
>
> (This is 8.4 material...)
>
> -Neil
>

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  Bruce Momjian  <bruce@momjian.us>        http://momjian.us
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