From 3db5450a5a54792e328b733a1c68dc8181376931 Mon Sep 17 00:00:00 2001
From: jianghaochen <jianghaochen@meituan.com>
Date: Mon, 5 Sep 2022 17:49:08 +0800
Subject: [PATCH] [fix](nereids) fix dead loop in unnesting subquery rule

---
 .../nereids/rules/rewrite/logical/ApplyPullFilterOnAgg.java  | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/fe/fe-core/src/main/java/org/apache/doris/nereids/rules/rewrite/logical/ApplyPullFilterOnAgg.java b/fe/fe-core/src/main/java/org/apache/doris/nereids/rules/rewrite/logical/ApplyPullFilterOnAgg.java
index 293aff291f1ae7..3ddd25b7199ebb 100644
--- a/fe/fe-core/src/main/java/org/apache/doris/nereids/rules/rewrite/logical/ApplyPullFilterOnAgg.java
+++ b/fe/fe-core/src/main/java/org/apache/doris/nereids/rules/rewrite/logical/ApplyPullFilterOnAgg.java
@@ -68,6 +68,11 @@ public Rule build() {
             List<Expression> correlatedPredicate = split.get(true);
             List<Expression> unCorrelatedPredicate = split.get(false);
 
+            // the representative has experienced the rule and added the correlated predicate to the apply node
+            if (correlatedPredicate.isEmpty()) {
+                return apply;
+            }
+
             LogicalFilter<GroupPlan> newUnCorrelatedFilter = null;
             if (!unCorrelatedPredicate.isEmpty()) {
                 newUnCorrelatedFilter = new LogicalFilter<>(ExpressionUtils.and(unCorrelatedPredicate),