Reuse abbreviated keys in ordered [set] aggregates.
Robert Haas <rhaas@postgresql.org>
Reuse abbreviated keys in ordered [set] aggregates. When processing ordered aggregates following a sort that could make use of the abbreviated key optimization, only call the equality operator to compare successive pairs of tuples when their abbreviated keys were not equal. Peter Geoghegan, reviewd by Andreas Karlsson and by me.
Files
| Path | Change | +/− |
|---|---|---|
| src/backend/catalog/index.c | modified | +1 −1 |
| src/backend/executor/nodeAgg.c | modified | +13 −3 |
| src/backend/executor/nodeSort.c | modified | +1 −1 |
| src/backend/utils/adt/orderedsetaggs.c | modified | +23 −10 |
| src/backend/utils/sort/tuplesort.c | modified | +52 −22 |
| src/include/utils/tuplesort.h | modified | +2 −2 |