Correct obsolete UNION hash aggs comment.
commitb1d79127ed875f04720d2c4677a75f43528bfe08
authorPeter Geoghegan <pg@bowt.ie>
Wed, 29 Jul 2020 00:14:07 +0000 (28 17:14 -0700)
committerPeter Geoghegan <pg@bowt.ie>
Wed, 29 Jul 2020 00:14:07 +0000 (28 17:14 -0700)
tree1cd3db277317cd7e00c965f7db38e288577af609
parentf36e82072c8866ba2eca08d88d1a5c3e0c3d1eb4
Correct obsolete UNION hash aggs comment.

Oversight in commit 1f39bce0, which added disk-based hash aggregation.

Backpatch: 13-, where disk-based hash aggregation was introduced.
src/backend/optimizer/prep/prepunion.c