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Re: [HACKERS] GatherMerge misses to push target list - Mailing list pgsql-hackers

From Amit Kapila
Subject Re: [HACKERS] GatherMerge misses to push target list
Date
Msg-id CAA4eK1JAZMLtEL7JVO3AyxX9_PGc4PDwE13q3MFhwYuJ_HYM=g@mail.gmail.com
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In response to [HACKERS] GatherMerge misses to push target list  (Amit Kapila <amit.kapila16@gmail.com>)
List pgsql-hackers
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On Wed, Sep 6, 2017 at 10:04 AM, Amit Kapila <amit.kapila16@gmail.com> wrote:
> During my recent work on costing of parallel paths [1], I noticed that
> we are missing to push target list below GatherMerge in some simple
> cases like below.
>

I think this should be considered as a bug-fix for 10.0, but it
doesn't block any functionality or give wrong results, so we might
consider it as an optimization for GatherMerge.   In any case, I have
added this to next CF.

-- 
With Regards,
Amit Kapila.
EnterpriseDB: http://www.enterprisedb.com


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