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Diffstat (limited to 'src')
| -rw-r--r-- | src/backend/optimizer/path/indxpath.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/src/backend/optimizer/path/indxpath.c b/src/backend/optimizer/path/indxpath.c index 89b42da6b46..e23cc5eb7b2 100644 --- a/src/backend/optimizer/path/indxpath.c +++ b/src/backend/optimizer/path/indxpath.c @@ -2174,6 +2174,13 @@ match_pathkeys_to_index(IndexOptInfo *index, List *pathkeys, if (!bms_equal(member->em_relids, index->rel->relids)) continue; + /* + * We allow any column of the index to match each pathkey; they + * don't have to match left-to-right as you might expect. This + * is correct for GiST, which is the sole existing AM supporting + * amcanorderbyop. We might need different logic in future for + * other implementations. + */ for (indexcol = 0; indexcol < index->ncolumns; indexcol++) { Expr *expr; |