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-rw-r--r--src/backend/optimizer/prep/prepunion.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/backend/optimizer/prep/prepunion.c b/src/backend/optimizer/prep/prepunion.c
index 45ecde416f9..4686578e3bd 100644
--- a/src/backend/optimizer/prep/prepunion.c
+++ b/src/backend/optimizer/prep/prepunion.c
@@ -1641,6 +1641,7 @@ adjust_appendrel_attrs_mutator(Node *node, AppendRelInfo *context)
Assert(!IsA(node, SpecialJoinInfo));
Assert(!IsA(node, AppendRelInfo));
Assert(!IsA(node, PlaceHolderInfo));
+ Assert(!IsA(node, MinMaxAggInfo));
/*
* We have to process RestrictInfo nodes specially. (Note: although