| From: | Robert Haas <robertmhaas(at)gmail(dot)com> |
|---|---|
| To: | Rushabh Lathia <rushabh(dot)lathia(at)gmail(dot)com> |
| Cc: | Amit Kapila <amit(dot)kapila16(at)gmail(dot)com>, Thomas Munro <thomas(dot)munro(at)enterprisedb(dot)com>, Michael Paquier <michael(dot)paquier(at)gmail(dot)com>, Kuntal Ghosh <kuntalghosh(dot)2007(at)gmail(dot)com>, Haribabu Kommi <kommi(dot)haribabu(at)gmail(dot)com>, PostgreSQL Hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Gather Merge |
| Date: | 2017-03-09 03:10:49 |
| Message-ID: | CA+TgmoauTbRNABKuOJmeLrpMup+f3n+vO7n_NkC2Ji6J61ORKA@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Mon, Feb 20, 2017 at 1:35 AM, Rushabh Lathia
<rushabh(dot)lathia(at)gmail(dot)com> wrote:
> Thanks Amit for raising this point. I was not at all aware of mark/restore.
> I tried to come up with the case, but haven't found such case.
>
> For now here is the patch with comment update.
Sorry for the delay in getting back to this. This seems to need minor
rebasing again.
A few other points:
ExecEndGatherMerge needs to be patched along the lines of
acf555bc53acb589b5a2827e65d655fa8c9adee0.
@@ -2290,7 +2376,6 @@ create_limit_plan(PlannerInfo *root, LimitPath
*best_path, int flags)
return plan;
}
-
/*****************************************************************************
*
* BASE-RELATION SCAN METHODS
Unnecessary.
--
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company
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