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(parent: 6b76f1b) | patch
Fix wrong costing of Sort under Gather Merge.
authorRobert Haas <[email protected]>
Wed, 22 Mar 2017 18:42:03 +0000 (14:42 -0400)
committerRobert Haas <[email protected]>
Wed, 22 Mar 2017 18:45:14 +0000 (14:45 -0400)
commitdc02c7bca4dccf7de278cdc6b3325a829e75b252
tree27944d3e204c2ef613c1a9e7e2b40d5424118d07tree
parent6b76f1bb58f53aec25cfec76391270ea36ad1170commit | diff
Fix wrong costing of Sort under Gather Merge.

There's no mechanism for such a sort to become a top-N sort, so we
should pass -1 rather than limit_tuples to cost_sort().

Rushabh Lathia, per a report from Mithun Cy

Discussion: http://postgr.es/m/CAGPqQf1akRcSgC9=6iwx=sEPap9UvPpHJLzg8_N+OuHdb6fL+g@mail.gmail.com
src/backend/optimizer/plan/planner.c diff | blob | blame | history
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