1 files changed, 4 insertions, 0 deletions
diff --git a/src/include/executor/nodeSubplan.h b/src/include/executor/nodeSubplan.h
index a1cafbcc694..301c29d1f24 100644
--- a/src/include/executor/nodeSubplan.h
+++ b/src/include/executor/nodeSubplan.h
@@ -20,6 +20,10 @@ extern SubPlanState *ExecInitSubPlan(SubPlan *subplan, PlanState *parent);
 
 extern Datum ExecSubPlan(SubPlanState *node, ExprContext *econtext, bool *isNull);
 
+extern Size EstimateSubplanHashTableSpace(double nentries,
+										  Size tupleWidth,
+										  bool unknownEqFalse);
+
 extern void ExecReScanSetParamPlan(SubPlanState *node, PlanState *parent);
 
 extern void ExecSetParamPlan(SubPlanState *node, ExprContext *econtext);