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
Branch
------
master
Details
-------
http://git.postgresql.org/pg/commitdiff/dc02c7bca4dccf7de278cdc6b3325a829e75b252
Modified Files
--------------
src/backend/optimizer/plan/planner.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)