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-rw-r--r--src/backend/nodes/nodeFuncs.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/backend/nodes/nodeFuncs.c b/src/backend/nodes/nodeFuncs.c
index 47d0564fa29..ec25aae6e38 100644
--- a/src/backend/nodes/nodeFuncs.c
+++ b/src/backend/nodes/nodeFuncs.c
@@ -736,6 +736,8 @@ expression_returns_set_walker(Node *node, void *context)
/* Avoid recursion for some cases that parser checks not to return a set */
if (IsA(node, Aggref))
return false;
+ if (IsA(node, GroupingFunc))
+ return false;
if (IsA(node, WindowFunc))
return false;