diff --git a/src/sql/optimizer/ob_log_plan.cpp b/src/sql/optimizer/ob_log_plan.cpp
index 0441a30238..c3d3f156ed 100644
--- a/src/sql/optimizer/ob_log_plan.cpp
+++ b/src/sql/optimizer/ob_log_plan.cpp
@@ -3776,9 +3776,9 @@ int ObLogPlan::inner_remove_redundancy_pred(ObIArray<ObRawExpr*> &join_pred,
                    right_table.is_superset(right_expr->get_relation_ids()))) {
         // the pred does not join the given two tables,
         // decide whether remove this qual later
-      } else if (ObOptimizerUtil::is_expr_equivalent(left_expr,
-                                                     right_expr,
-                                                     equal_sets)) {
+      } else if (ObOptimizerUtil::in_same_equalset(left_expr,
+                                                   right_expr,
+                                                   equal_sets)) {
         // remove preds which is equation between two exprs in the same equal sets
         has_checked.at(i) = true;
         OPT_TRACE("remove redundancy join condition:", cur_expr);
diff --git a/src/sql/optimizer/ob_optimizer_util.cpp b/src/sql/optimizer/ob_optimizer_util.cpp
index cb205d5301..0903e58512 100644
--- a/src/sql/optimizer/ob_optimizer_util.cpp
+++ b/src/sql/optimizer/ob_optimizer_util.cpp
@@ -509,6 +509,23 @@ bool ObOptimizerUtil::is_same_ordering(const common::ObIArray<OrderItem> &orderi
   return is_same;
 }
 
+bool ObOptimizerUtil::in_same_equalset(const ObRawExpr *from,
+                                       const ObRawExpr *to,
+                                       const EqualSets &equal_sets)
+{
+  bool found = false;
+  int64_t N = equal_sets.count();
+  for (int64_t i = 0; !found && i < N; ++i) {
+    if (OB_ISNULL(equal_sets.at(i))) {
+      LOG_WARN_RET(OB_ERR_UNEXPECTED, "get null equal set");
+    } else if (find_equal_expr(*equal_sets.at(i), from) &&
+               find_equal_expr(*equal_sets.at(i), to)) {
+      found = true;
+    }
+  }
+  return found;
+}
+
 bool ObOptimizerUtil::is_expr_equivalent(const ObRawExpr *from,
                                          const ObRawExpr *to,
                                          const EqualSets &equal_sets)
diff --git a/src/sql/optimizer/ob_optimizer_util.h b/src/sql/optimizer/ob_optimizer_util.h
index e35d5954ea..aec2a1276a 100644
--- a/src/sql/optimizer/ob_optimizer_util.h
+++ b/src/sql/optimizer/ob_optimizer_util.h
@@ -136,6 +136,10 @@ public:
                                const common::ObIArray<OrderItem> &ordering2,
                                const EqualSets &equal_sets);
 
+  static bool in_same_equalset(const ObRawExpr *from,
+                               const ObRawExpr *to,
+                               const EqualSets &equal_sets);
+
   static bool is_expr_equivalent(const ObRawExpr *from,
                                  const ObRawExpr *to,
                                  const EqualSets &equal_sets);