Re: [HACKERS] parallelize queries containing initplans

From: Robert Haas <robertmhaas(at)gmail(dot)com>
To: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: Amit Kapila <amit(dot)kapila16(at)gmail(dot)com>, Haribabu Kommi <kommi(dot)haribabu(at)gmail(dot)com>, Kuntal Ghosh <kuntalghosh(dot)2007(at)gmail(dot)com>, pgsql-hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: [HACKERS] parallelize queries containing initplans
Date: 2017-11-14 18:55:55
Message-ID: CA+Tgmoa27ukh0OSjGQ2KztT_BQJMoZGcCjTeHowmiem8cpgsCg@mail.gmail.com
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On Tue, Nov 14, 2017 at 11:00 AM, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
> Yeah, I'm sure it is. I have a vague recollection that there might be
> existing regression test cases exercising such things, though I won't
> swear to that. The "orderstest" bit in subselect.sql looks like it
> might be meant to do that...

Here's an updated patch that attempts to work around this problem using DSA.

It could use a test case that actually tickles the new logic in
ExecParallelReinitialize ... this is mostly just to show the concept.

--
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company

Attachment Content-Type Size
initplan-pushdown-with-dsa.patch application/octet-stream 27.8 KB

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