Re: Parallel Seq Scan

From: Robert Haas <robertmhaas(at)gmail(dot)com>
To: Noah Misch <noah(at)leadboat(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: 2015-10-23 03:59:58
Message-ID: CA+TgmoZZtsFi5fy25UZ=2z6nwbQbua4Dsf5Qv0b7zqhW9sDwvA@mail.gmail.com
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On Thu, Oct 15, 2015 at 8:23 PM, Noah Misch <noah(at)leadboat(dot)com> wrote:
> Agreed. More specifically, I had in mind for copyParamList() to check the
> mask while e.g. ExecEvalParamExtern() would either check nothing or merely
> assert that any mask included the requested parameter. It would be tricky to
> verify that as safe, so ...
>
>> Would it work to define this as "if non-NULL,
>> params lacking a 1-bit may be safely ignored"? Or some other tweak
>> that basically says that you don't need to care about this, but you
>> can if you want to.
>
> ... this is a better specification.

Here's an attempt to implement that.

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

Attachment Content-Type Size
serialize-paramlistinfo-fixes.patch application/x-patch 10.0 KB

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