Improve UniquePath logic to detect the case where the input is already
Tom Lane <tgl@sss.pgh.pa.us>
Improve UniquePath logic to detect the case where the input is already known unique (eg, it is a SELECT DISTINCT ... subquery), and not do a redundant unique-ification step.
Files
| Path | Change | +/− |
|---|---|---|
| src/backend/nodes/outfuncs.c | modified | +2 −2 |
| src/backend/optimizer/plan/createplan.c | modified | +6 −2 |
| src/backend/optimizer/util/clauses.c | modified | +16 −1 |
| src/backend/optimizer/util/pathnode.c | modified | +30 −4 |
| src/include/nodes/relation.h | modified | +16 −5 |
| src/include/optimizer/clauses.h | modified | +2 −1 |