diff options
Diffstat (limited to 'src/backend/optimizer/path/indxpath.c')
| -rw-r--r-- | src/backend/optimizer/path/indxpath.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/src/backend/optimizer/path/indxpath.c b/src/backend/optimizer/path/indxpath.c index 58b8797b738..e97c1636b1a 100644 --- a/src/backend/optimizer/path/indxpath.c +++ b/src/backend/optimizer/path/indxpath.c @@ -2286,6 +2286,15 @@ match_index_to_operand(Node *operand, int indkey; /* + * Ignore any PlaceHolderVar nodes above the operand. This is needed so + * that we can successfully use expression-index constraints pushed down + * through appendrels (UNION ALL). It's safe because a PlaceHolderVar + * appearing in a relation-scan-level expression is certainly a no-op. + */ + while (operand && IsA(operand, PlaceHolderVar)) + operand = (Node *) ((PlaceHolderVar *) operand)->phexpr; + + /* * Ignore any RelabelType node above the operand. This is needed to be * able to apply indexscanning in binary-compatible-operator cases. Note: * we can assume there is at most one RelabelType node; |