diff --git a/backends-clickhouse/src/main/scala/org/apache/gluten/extension/RewriteSortMergeJoinToHashJoinRule.scala b/backends-clickhouse/src/main/scala/org/apache/gluten/extension/RewriteSortMergeJoinToHashJoinRule.scala
index 8c5ada043fbb6..0c463bd779af9 100644
--- a/backends-clickhouse/src/main/scala/org/apache/gluten/extension/RewriteSortMergeJoinToHashJoinRule.scala
+++ b/backends-clickhouse/src/main/scala/org/apache/gluten/extension/RewriteSortMergeJoinToHashJoinRule.scala
@@ -86,6 +86,7 @@ case class RewriteSortMergeJoinToHashJoinRule(session: SparkSession)
       logError(s"Validation failed for ShuffledHashJoinExec: ${validateResult.reason()}")
       return smj
     }
+    logDebug(s"Applied SortMergeJoin to ShuffledHashJoin")
     hashJoin
   }
 
diff --git a/backends-clickhouse/src/main/scala/org/apache/gluten/utils/CHJoinValidateUtil.scala b/backends-clickhouse/src/main/scala/org/apache/gluten/utils/CHJoinValidateUtil.scala
index aabdae0951a7c..b86482720c7c8 100644
--- a/backends-clickhouse/src/main/scala/org/apache/gluten/utils/CHJoinValidateUtil.scala
+++ b/backends-clickhouse/src/main/scala/org/apache/gluten/utils/CHJoinValidateUtil.scala
@@ -54,8 +54,12 @@ object CHJoinValidateUtil extends Logging {
       condition.isDefined && hasTwoTableColumn(leftOutputSet, rightOutputSet, condition.get)
     val shouldFallback = joinStrategy match {
       case SortMergeJoinStrategy(joinType) =>
-        joinType.sql.contains("SEMI") || joinType.sql.contains("ANTI") || joinType.toString
-          .contains("ExistenceJoin") || hasMixedFilterCondition
+        if (!joinType.isInstanceOf[ExistenceJoin] && joinType.sql.contains("INNER")) {
+          false
+        } else {
+          joinType.sql.contains("SEMI") || joinType.sql.contains("ANTI") || joinType.toString
+            .contains("ExistenceJoin") || hasMixedFilterCondition
+        }
       case UnknownJoinStrategy(joinType) =>
         throw new IllegalArgumentException(s"Unknown join type $joinStrategy")
       case _ => false
diff --git a/backends-clickhouse/src/test/scala/org/apache/gluten/execution/GlutenClickHouseColumnarMemorySortShuffleSuite.scala b/backends-clickhouse/src/test/scala/org/apache/gluten/execution/GlutenClickHouseColumnarMemorySortShuffleSuite.scala
index b9d580c7249cd..4c49cc2d9f46c 100644
--- a/backends-clickhouse/src/test/scala/org/apache/gluten/execution/GlutenClickHouseColumnarMemorySortShuffleSuite.scala
+++ b/backends-clickhouse/src/test/scala/org/apache/gluten/execution/GlutenClickHouseColumnarMemorySortShuffleSuite.scala
@@ -119,7 +119,7 @@ class GlutenClickHouseColumnarMemorySortShuffleSuite
   }
 
   test("TPCH Q21") {
-    runTPCHQuery(21, noFallBack = false) { df => }
+    runTPCHQuery(21) { df => }
   }
 
   test("TPCH Q22") {
diff --git a/backends-clickhouse/src/test/scala/org/apache/gluten/execution/GlutenClickHouseColumnarShuffleAQESuite.scala b/backends-clickhouse/src/test/scala/org/apache/gluten/execution/GlutenClickHouseColumnarShuffleAQESuite.scala
index 10e5c7534d352..e5da78de3fd60 100644
--- a/backends-clickhouse/src/test/scala/org/apache/gluten/execution/GlutenClickHouseColumnarShuffleAQESuite.scala
+++ b/backends-clickhouse/src/test/scala/org/apache/gluten/execution/GlutenClickHouseColumnarShuffleAQESuite.scala
@@ -163,7 +163,7 @@ class GlutenClickHouseColumnarShuffleAQESuite
   }
 
   test("TPCH Q21") {
-    runTPCHQuery(21, noFallBack = false) { df => }
+    runTPCHQuery(21) { df => }
   }
 
   test("TPCH Q22") {
diff --git a/backends-clickhouse/src/test/scala/org/apache/gluten/execution/GlutenClickHouseDSV2ColumnarShuffleSuite.scala b/backends-clickhouse/src/test/scala/org/apache/gluten/execution/GlutenClickHouseDSV2ColumnarShuffleSuite.scala
index dd997832d3e3d..17bd9912b032c 100644
--- a/backends-clickhouse/src/test/scala/org/apache/gluten/execution/GlutenClickHouseDSV2ColumnarShuffleSuite.scala
+++ b/backends-clickhouse/src/test/scala/org/apache/gluten/execution/GlutenClickHouseDSV2ColumnarShuffleSuite.scala
@@ -168,7 +168,7 @@ class GlutenClickHouseDSV2ColumnarShuffleSuite extends GlutenClickHouseTPCHAbstr
   }
 
   test("TPCH Q21") {
-    runTPCHQuery(21, noFallBack = false) { df => }
+    runTPCHQuery(21) { df => }
   }
 
   test("TPCH Q22") {
diff --git a/backends-clickhouse/src/test/scala/org/apache/gluten/execution/GlutenClickHouseDSV2Suite.scala b/backends-clickhouse/src/test/scala/org/apache/gluten/execution/GlutenClickHouseDSV2Suite.scala
index 08393ccfe7748..a58b6b1c1292d 100644
--- a/backends-clickhouse/src/test/scala/org/apache/gluten/execution/GlutenClickHouseDSV2Suite.scala
+++ b/backends-clickhouse/src/test/scala/org/apache/gluten/execution/GlutenClickHouseDSV2Suite.scala
@@ -126,7 +126,7 @@ class GlutenClickHouseDSV2Suite extends GlutenClickHouseTPCHAbstractSuite {
   }
 
   test("TPCH Q21") {
-    runTPCHQuery(21, noFallBack = false) { df => }
+    runTPCHQuery(21) { df => }
   }
 
   test("TPCH Q22") {
diff --git a/backends-clickhouse/src/test/scala/org/apache/gluten/execution/GlutenClickHouseDecimalSuite.scala b/backends-clickhouse/src/test/scala/org/apache/gluten/execution/GlutenClickHouseDecimalSuite.scala
index cf1bdd296c013..bd831e64bf38c 100644
--- a/backends-clickhouse/src/test/scala/org/apache/gluten/execution/GlutenClickHouseDecimalSuite.scala
+++ b/backends-clickhouse/src/test/scala/org/apache/gluten/execution/GlutenClickHouseDecimalSuite.scala
@@ -343,7 +343,7 @@ class GlutenClickHouseDecimalSuite
               decimalTPCHTables.foreach {
                 dt =>
                   {
-                    val fallBack = (sql_num == 16 || sql_num == 21)
+                    val fallBack = (sql_num == 16)
                     val compareResult = !dt._2.contains(sql_num)
                     val native = if (fallBack) "fallback" else "native"
                     val compare = if (compareResult) "compare" else "noCompare"
diff --git a/backends-clickhouse/src/test/scala/org/apache/gluten/execution/GlutenClickHouseTPCHNullableColumnarShuffleSuite.scala b/backends-clickhouse/src/test/scala/org/apache/gluten/execution/GlutenClickHouseTPCHNullableColumnarShuffleSuite.scala
index c5f67f45d5771..5f9aa0dbda60f 100644
--- a/backends-clickhouse/src/test/scala/org/apache/gluten/execution/GlutenClickHouseTPCHNullableColumnarShuffleSuite.scala
+++ b/backends-clickhouse/src/test/scala/org/apache/gluten/execution/GlutenClickHouseTPCHNullableColumnarShuffleSuite.scala
@@ -171,7 +171,7 @@ class GlutenClickHouseTPCHNullableColumnarShuffleSuite extends GlutenClickHouseT
   }
 
   test("TPCH Q21") {
-    runTPCHQuery(21, noFallBack = false) { df => }
+    runTPCHQuery(21) { df => }
   }
 
   test("TPCH Q22") {
diff --git a/backends-clickhouse/src/test/scala/org/apache/gluten/execution/GlutenClickHouseTPCHNullableSuite.scala b/backends-clickhouse/src/test/scala/org/apache/gluten/execution/GlutenClickHouseTPCHNullableSuite.scala
index 7f62c69931577..e0e4d33804504 100644
--- a/backends-clickhouse/src/test/scala/org/apache/gluten/execution/GlutenClickHouseTPCHNullableSuite.scala
+++ b/backends-clickhouse/src/test/scala/org/apache/gluten/execution/GlutenClickHouseTPCHNullableSuite.scala
@@ -174,7 +174,7 @@ class GlutenClickHouseTPCHNullableSuite extends GlutenClickHouseTPCHAbstractSuit
   }
 
   test("TPCH Q21") {
-    runTPCHQuery(21, noFallBack = false) { df => }
+    runTPCHQuery(21) { df => }
   }
 
   test("TPCH Q22") {
diff --git a/backends-clickhouse/src/test/scala/org/apache/gluten/execution/GlutenClickHouseTPCHSuite.scala b/backends-clickhouse/src/test/scala/org/apache/gluten/execution/GlutenClickHouseTPCHSuite.scala
index 1c09449c817fb..f25a1313255ff 100644
--- a/backends-clickhouse/src/test/scala/org/apache/gluten/execution/GlutenClickHouseTPCHSuite.scala
+++ b/backends-clickhouse/src/test/scala/org/apache/gluten/execution/GlutenClickHouseTPCHSuite.scala
@@ -175,7 +175,7 @@ class GlutenClickHouseTPCHSuite extends GlutenClickHouseTPCHAbstractSuite {
   }
 
   test("TPCH Q21") {
-    runTPCHQuery(21, noFallBack = false) { df => }
+    runTPCHQuery(21) { df => }
   }
 
   test("TPCH Q22") {
diff --git a/backends-clickhouse/src/test/scala/org/apache/gluten/execution/tpcds/GlutenClickHouseTPCDSParquetColumnarShuffleAQESuite.scala b/backends-clickhouse/src/test/scala/org/apache/gluten/execution/tpcds/GlutenClickHouseTPCDSParquetColumnarShuffleAQESuite.scala
index 1fd8983f5876a..3e1507bf17aab 100644
--- a/backends-clickhouse/src/test/scala/org/apache/gluten/execution/tpcds/GlutenClickHouseTPCDSParquetColumnarShuffleAQESuite.scala
+++ b/backends-clickhouse/src/test/scala/org/apache/gluten/execution/tpcds/GlutenClickHouseTPCDSParquetColumnarShuffleAQESuite.scala
@@ -239,6 +239,6 @@ class GlutenClickHouseTPCDSParquetColumnarShuffleAQESuite
         | LIMIT 100 ;
         |""".stripMargin
     // There are some BroadcastHashJoin with NOT condition
-    compareResultsAgainstVanillaSpark(sql, true, { df => }, false)
+    compareResultsAgainstVanillaSpark(sql, true, { df => })
   }
 }
diff --git a/backends-clickhouse/src/test/scala/org/apache/gluten/execution/tpcds/GlutenClickHouseTPCDSParquetSortMergeJoinSuite.scala b/backends-clickhouse/src/test/scala/org/apache/gluten/execution/tpcds/GlutenClickHouseTPCDSParquetSortMergeJoinSuite.scala
index 509c830545c60..ddbc721c5b6ad 100644
--- a/backends-clickhouse/src/test/scala/org/apache/gluten/execution/tpcds/GlutenClickHouseTPCDSParquetSortMergeJoinSuite.scala
+++ b/backends-clickhouse/src/test/scala/org/apache/gluten/execution/tpcds/GlutenClickHouseTPCDSParquetSortMergeJoinSuite.scala
@@ -49,8 +49,9 @@ class GlutenClickHouseTPCDSParquetSortMergeJoinSuite extends GlutenClickHouseTPC
       .set("spark.shuffle.manager", "sort")
       .set("spark.io.compression.codec", "snappy")
       .set("spark.sql.shuffle.partitions", "5")
-      .set("spark.sql.autoBroadcastJoinThreshold", "10MB")
+      .set("spark.sql.autoBroadcastJoinThreshold", "-1")
       .set("spark.memory.offHeap.size", "8g")
+      .set("spark.executor.cores", "2")
       .set("spark.gluten.sql.columnar.forceShuffledHashJoin", "false")
   }
 
diff --git a/backends-clickhouse/src/test/scala/org/apache/gluten/execution/tpch/GlutenClickHouseTPCHColumnarShuffleParquetAQESuite.scala b/backends-clickhouse/src/test/scala/org/apache/gluten/execution/tpch/GlutenClickHouseTPCHColumnarShuffleParquetAQESuite.scala
index c2e2f9f5565f2..39dc7baf96950 100644
--- a/backends-clickhouse/src/test/scala/org/apache/gluten/execution/tpch/GlutenClickHouseTPCHColumnarShuffleParquetAQESuite.scala
+++ b/backends-clickhouse/src/test/scala/org/apache/gluten/execution/tpch/GlutenClickHouseTPCHColumnarShuffleParquetAQESuite.scala
@@ -275,7 +275,7 @@ class GlutenClickHouseTPCHColumnarShuffleParquetAQESuite
   }
 
   test("TPCH Q21") {
-    runTPCHQuery(21, noFallBack = false) {
+    runTPCHQuery(21) {
       df =>
         val plans = collect(df.queryExecution.executedPlan) {
           case scanExec: BasicScanExecTransformer => scanExec
diff --git a/backends-clickhouse/src/test/scala/org/apache/gluten/execution/tpch/GlutenClickHouseTPCHParquetAQESuite.scala b/backends-clickhouse/src/test/scala/org/apache/gluten/execution/tpch/GlutenClickHouseTPCHParquetAQESuite.scala
index 1d8389b481439..2aadac05d348c 100644
--- a/backends-clickhouse/src/test/scala/org/apache/gluten/execution/tpch/GlutenClickHouseTPCHParquetAQESuite.scala
+++ b/backends-clickhouse/src/test/scala/org/apache/gluten/execution/tpch/GlutenClickHouseTPCHParquetAQESuite.scala
@@ -209,7 +209,7 @@ class GlutenClickHouseTPCHParquetAQESuite
   }
 
   test("TPCH Q21") {
-    runTPCHQuery(21, noFallBack = false) { df => }
+    runTPCHQuery(21) { df => }
   }
 
   test("TPCH Q22") {
diff --git a/backends-clickhouse/src/test/scala/org/apache/gluten/execution/tpch/GlutenClickHouseTPCHSaltNullParquetSuite.scala b/backends-clickhouse/src/test/scala/org/apache/gluten/execution/tpch/GlutenClickHouseTPCHSaltNullParquetSuite.scala
index 0efc1414ce338..e21df203dac03 100644
--- a/backends-clickhouse/src/test/scala/org/apache/gluten/execution/tpch/GlutenClickHouseTPCHSaltNullParquetSuite.scala
+++ b/backends-clickhouse/src/test/scala/org/apache/gluten/execution/tpch/GlutenClickHouseTPCHSaltNullParquetSuite.scala
@@ -335,7 +335,7 @@ class GlutenClickHouseTPCHSaltNullParquetSuite extends GlutenClickHouseTPCHAbstr
   }
 
   test("TPCH Q21") {
-    runTPCHQuery(21, noFallBack = false) { df => }
+    runTPCHQuery(21) { df => }
   }
 
   test("GLUTEN-2115: Fix wrong number of records shuffle written") {
diff --git a/cpp-ch/local-engine/Common/QueryContext.cpp b/cpp-ch/local-engine/Common/QueryContext.cpp
index e5f5dd5dccdb8..44f7066ed0679 100644
--- a/cpp-ch/local-engine/Common/QueryContext.cpp
+++ b/cpp-ch/local-engine/Common/QueryContext.cpp
@@ -27,6 +27,9 @@
 #include <sstream>
 #include <iomanip>
 
+#include <Poco/Logger.h>
+#include <Common/logger_useful.h>
+
 
 namespace DB
 {
@@ -70,6 +73,7 @@ int64_t QueryContextManager::initializeQuery()
 
     query_context->thread_group->memory_tracker.setSoftLimit(memory_limit);
     query_context->thread_group->memory_tracker.setHardLimit(memory_limit + config.extra_memory_hard_limit);
+    LOG_INFO(getLogger("QueryContextManager"), "xxx memory limit: {} {}", memory_limit, config.extra_memory_hard_limit);
     int64_t id = reinterpret_cast<int64_t>(query_context->thread_group.get());
     query_map.insert(id, query_context);
     return id;
@@ -167,4 +171,4 @@ double currentThreadGroupMemoryUsageRatio()
     }
     return static_cast<double>(CurrentThread::getGroup()->memory_tracker.get()) / CurrentThread::getGroup()->memory_tracker.getSoftLimit();
 }
-}
\ No newline at end of file
+}
diff --git a/gluten-core/src/test/scala/org/apache/gluten/execution/WholeStageTransformerSuite.scala b/gluten-core/src/test/scala/org/apache/gluten/execution/WholeStageTransformerSuite.scala
index 95391a2c42f56..9b39a04f2ad7d 100644
--- a/gluten-core/src/test/scala/org/apache/gluten/execution/WholeStageTransformerSuite.scala
+++ b/gluten-core/src/test/scala/org/apache/gluten/execution/WholeStageTransformerSuite.scala
@@ -40,7 +40,8 @@ case class Table(name: String, partitionColumns: Seq[String])
 abstract class WholeStageTransformerSuite
   extends GlutenQueryTest
   with SharedSparkSession
-  with AdaptiveSparkPlanHelper {
+  with AdaptiveSparkPlanHelper
+  with Logging {
 
   protected val resourcePath: String
   protected val fileFormat: String
@@ -120,6 +121,9 @@ abstract class WholeStageTransformerSuite
     val queryResultStr =
       Arm.withResource(Source.fromFile(new File(queriesResults + "/" + sqlNum + ".out"), "UTF-8"))(
         _.mkString)
+    if (!queryResultStr.equals(resultStr.toString())) {
+      logError(s"Results are mismatched. $queryResultStr vs. ${resultStr.toString()}")
+    }
     assert(queryResultStr.equals(resultStr.toString))
   }