pgsql: Expand coverage of parallel gather merge a bit.

From: Andres Freund <andres(at)anarazel(dot)de>
To: pgsql-committers(at)postgresql(dot)org
Subject: pgsql: Expand coverage of parallel gather merge a bit.
Date: 2017-08-14 22:29:28
Message-ID: E1dhNrU-0007RG-03@gemulon.postgresql.org
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Expand coverage of parallel gather merge a bit.

Previously paths reaching heap_compare_slots weren't covered.

Author: Rushabh Lathia
Reviewed-By: Andres Freund
Discussion:
https://postgr.es/m/CAGPqQf3C+3PBujb+7m=ceWeii4-vBY=XS99LjzrpkpefvzJbFg@mail.gmail.com
https://postgr.es/m/27200.1502482851@sss.pgh.pa.us
Backpatch: 10, where gather merge was introduced

Branch
------
master

Details
-------
https://git.postgresql.org/pg/commitdiff/d2bc501573d98ff5541271dca94fb5f7a004ecbf

Modified Files
--------------
src/test/regress/expected/select_parallel.out | 69 +++++++++++++++++++++------
src/test/regress/sql/select_parallel.sql | 14 ++++--
2 files changed, 65 insertions(+), 18 deletions(-)

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