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(parent: 7d8f698) | patch
Avoid GatherMerge crash when there are no workers.
authorRobert Haas <rhaas@postgresql.org>
Sat, 1 Apr 2017 01:15:05 +0000 (21:15 -0400)
committerRobert Haas <rhaas@postgresql.org>
Sat, 1 Apr 2017 01:15:05 +0000 (21:15 -0400)
commit25dc142a49c60c3107480c487cd8444dc83f9bdf
tree2b6297882639eb9f0e66eb229b3213ae1125d52ctree | snapshot
parent7d8f6986b83c9a56f6ea11c959cdd8f52e1b543dcommit | diff
Avoid GatherMerge crash when there are no workers.

It's unnecessary to return an actual slot when we have no tuple.
We can just return NULL, which avoids the risk of indexing into an
array that might not contain any elements.

Rushabh Lathia, per a report from Tomas Vondra

Discussion: http://postgr.es/m/6ecd6f17-0dcf-1de7-ded8-0de7db1ddc88@2ndquadrant.com
src/backend/executor/nodeGatherMerge.c diff | blob | history
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