| 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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| Lists: | pgsql-hackers |
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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