| From: | Noah Misch <noah(at)leadboat(dot)com> |
|---|---|
| To: | Robert Haas <robertmhaas(at)gmail(dot)com> |
| Cc: | Amit Kapila <amit(dot)kapila16(at)gmail(dot)com>, Kouhei Kaigai <kaigai(at)ak(dot)jp(dot)nec(dot)com>, Haribabu Kommi <kommi(dot)haribabu(at)gmail(dot)com>, Gavin Flower <GavinFlower(at)archidevsys(dot)co(dot)nz>, Jeff Davis <pgsql(at)j-davis(dot)com>, Andres Freund <andres(at)2ndquadrant(dot)com>, Amit Langote <amitlangote09(at)gmail(dot)com>, Amit Langote <Langote_Amit_f8(at)lab(dot)ntt(dot)co(dot)jp>, Fabrízio Mello <fabriziomello(at)gmail(dot)com>, Thom Brown <thom(at)linux(dot)com>, Stephen Frost <sfrost(at)snowman(dot)net>, pgsql-hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Parallel Seq Scan |
| Date: | 2015-10-31 03:12:55 |
| Message-ID: | 20151031031255.GA835242@tornado.leadboat.com |
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| Lists: | pgsql-hackers |
On Wed, Oct 28, 2015 at 01:04:12AM +0100, Robert Haas wrote:
> Well, OK. That's not strictly a correctness issue, but here's an
> updated patch along the lines you suggested.
> Finally, have setup_param_list set a new ParamListInfo field,
> paramMask, to the parameters actually used in the expression, so that
> we don't try to fetch those that are not needed when serializing a
> parameter list. This isn't necessary for performance, but it makes
s/performance/correctness/
> the performance of the parallel executor code comparable to what we
> do for cases involving cursors.
With that, the patch is ready.
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