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Improve coding pattern in Parallel Append code.

Amit Kapila <akapila@postgresql.org>

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Commit: 98d476a965eefb52af53f4fb55dbfead0ede9282
Author: Amit Kapila <akapila@postgresql.org>
Date: 2018-06-22T03:13:36Z
Releases: 11.0 
Improve coding pattern in Parallel Append code.

The create_append_path code didn't consider that list_concat will
modify it's first argument leading to inconsistent traversal of
resulting list.  In practice, it won't lead to any user-visible bug
but changing it for making the code behave consistently.

Reported-by: Tom Lane
Author: Tom Lane
Reviewed-by: Amit Khandekar and Amit Kapila
Discussion: https://postgr.es/m/32365.1528994120@sss.pgh.pa.us

Files

PathChange+/−
src/backend/optimizer/util/pathnode.c modified +1 −1

Discussion