Re: Parallel Seq Scan - Mailing list pgsql-hackers

From Robert Haas
Subject Re: Parallel Seq Scan
Date
Msg-id CA+TgmoZZtsFi5fy25UZ=2z6nwbQbua4Dsf5Qv0b7zqhW9sDwvA@mail.gmail.com
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In response to Re: Parallel Seq Scan  (Noah Misch <noah@leadboat.com>)
Responses Re: Parallel Seq Scan  (Tom Lane <tgl@sss.pgh.pa.us>)
Re: Parallel Seq Scan  (Noah Misch <noah@leadboat.com>)
List pgsql-hackers
On Thu, Oct 15, 2015 at 8:23 PM, Noah Misch <noah@leadboat.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

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