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-rw-r--r--src/backend/optimizer/plan/setrefs.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/backend/optimizer/plan/setrefs.c b/src/backend/optimizer/plan/setrefs.c
index 3dcded506be..2b676bf4061 100644
--- a/src/backend/optimizer/plan/setrefs.c
+++ b/src/backend/optimizer/plan/setrefs.c
@@ -678,6 +678,7 @@ set_plan_refs(PlannerInfo *root, Plan *plan, int rtoffset)
case T_Material:
case T_Sort:
+ case T_IncrementalSort:
case T_Unique:
case T_SetOp: