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(parent: f4a9da0) | patch
Avoid creating PlaceHolderVars immediately within PlaceHolderVars.
authorTom Lane <tgl@sss.pgh.pa.us>
Tue, 9 Aug 2011 15:33:46 +0000 (11:33 -0400)
committerTom Lane <tgl@sss.pgh.pa.us>
Tue, 9 Aug 2011 15:34:20 +0000 (11:34 -0400)
commitcff60f2dfa470d5736a19d36eb910844e31db764
tree96d1218ac40d39c7aa2ea94e732f8aaa4660e8bdtree
parentf4a9da0a150ead846be33c38f665f4337a81054ecommit | diff
Avoid creating PlaceHolderVars immediately within PlaceHolderVars.

Such a construction is useless since the lower PlaceHolderVar is already
nullable; no need to make it more so.  Noted while pursuing bug #6154.

This is just a minor planner efficiency improvement, since the final plan
will come out the same anyway after PHVs are flattened.  So not worth the
risk of back-patching.
src/backend/optimizer/prep/prepjointree.c diff | blob | blame | history
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