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Re: [HACKERS] [PATCH] Push limit to sort through a subquery - Mailing list pgsql-hackers

From Tom Lane
Subject Re: [HACKERS] [PATCH] Push limit to sort through a subquery
Date
Msg-id 17392.1503589645@sss.pgh.pa.us
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In response to Re: [HACKERS] [PATCH] Push limit to sort through a subquery  (Robert Haas <robertmhaas@gmail.com>)
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Robert Haas <robertmhaas@gmail.com> writes:
> On Wed, Aug 23, 2017 at 6:55 PM, Douglas Doole <dougdoole@gmail.com> wrote:
>> From previous experience, pushing the limit to the workers has the potential
>> to be a big win .

> Here's a not-really-tested draft patch for that.

Both this patch and the already-committed one contain useless (and not
very cheap) expression_returns_set tests.  Since commit 69f4b9c85,
SRFs could only appear in the tlist of ProjectSet nodes.

No opinion on whether this patch is right otherwise.
        regards, tom lane

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