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-rw-r--r--src/backend/optimizer/util/var.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/backend/optimizer/util/var.c b/src/backend/optimizer/util/var.c
index a0543b7f47b..2b44ef3e176 100644
--- a/src/backend/optimizer/util/var.c
+++ b/src/backend/optimizer/util/var.c
@@ -809,6 +809,7 @@ flatten_join_alias_vars_mutator(Node *node,
rowexpr->args = fields;
rowexpr->row_typeid = var->vartype;
rowexpr->row_format = COERCE_IMPLICIT_CAST;
+ /* vartype will always be RECORDOID, so we always need colnames */
rowexpr->colnames = colnames;
rowexpr->location = var->location;