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Push target list evaluation through Gather Merge.

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We already do this for Gather, but it got overlooked for Gather Merge.

Amit Kapila, with review and minor revisions by Rushabh Lathia
and by me.

Discussion: http://postgr.es/m/CAA4eK1KUC5Uyu7qaifxrjpHxbSeoQh3yzwN3bThnJsmJcZ-qtA@mail.gmail.com
This commit is contained in:
Robert Haas
2017-11-13 16:33:56 -05:00
parent e64861c79b
commit 44ae64c388
4 changed files with 69 additions and 17 deletions
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3
src/backend/optimizer/plan/planner.c
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@ -5060,7 +5060,8 @@ create_ordered_paths(PlannerInfo *root,
path = (Path *)
create_gather_merge_path(root, ordered_rel,
path,
target, root->sort_pathkeys, NULL,
path->pathtarget,
root->sort_pathkeys, NULL,
&total_groups);
/* Add projection step if needed */