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Extend abbreviated key infrastructure to datum tuplesorts.

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Andrew Gierth, reviewed by Peter Geoghegan and by me.
This commit is contained in:
Robert Haas
2015-05-13 14:36:26 -04:00
parent 0bb8528b5c
commit 78efd5c1ed
3 changed files with 101 additions and 41 deletions
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4
src/backend/executor/nodeAgg.c
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@ -363,10 +363,6 @@ initialize_aggregates(AggState *aggstate,
* We use a plain Datum sorter when there's a single input column;
* otherwise sort the full tuple. (See comments for
* process_ordered_aggregate_single.)
*
* In the future, we should consider forcing the
* tuplesort_begin_heap() case when the abbreviated key
* optimization can thereby be used, even when numInputs is 1.
*/
peraggstate->sortstate =
(peraggstate->numInputs == 1) ?