diff --git a/native/core/src/execution/planner.rs b/native/core/src/execution/planner.rs
index c40e2e73f9..da452c2f15 100644
--- a/native/core/src/execution/planner.rs
+++ b/native/core/src/execution/planner.rs
@@ -70,6 +70,7 @@ use datafusion_physical_expr::aggregate::{AggregateExprBuilder, AggregateFunctio
 
 use crate::execution::shuffle::CompressionCodec;
 use crate::execution::spark_plan::SparkPlan;
+use datafusion::physical_plan::coalesce_batches::CoalesceBatchesExec;
 use datafusion_comet_proto::{
     spark_expression::{
         self, agg_expr::ExprStruct as AggExprStruct, expr::ExprStruct, literal::Value, AggExpr,
@@ -1183,17 +1184,42 @@ impl PhysicalPlanner {
                     false,
                 )?);
 
-                Ok((
-                    scans,
-                    Arc::new(SparkPlan::new(
-                        spark_plan.plan_id,
-                        join,
-                        vec![
-                            Arc::clone(&join_params.left),
-                            Arc::clone(&join_params.right),
-                        ],
-                    )),
-                ))
+                if join.filter.is_some() {
+                    // SMJ with join filter produces lots of tiny batches
+                    let coalesce_batches: Arc<dyn ExecutionPlan> =
+                        Arc::new(CoalesceBatchesExec::new(
+                            Arc::<SortMergeJoinExec>::clone(&join),
+                            self.session_ctx
+                                .state()
+                                .config_options()
+                                .execution
+                                .batch_size,
+                        ));
+                    Ok((
+                        scans,
+                        Arc::new(SparkPlan::new_with_additional(
+                            spark_plan.plan_id,
+                            coalesce_batches,
+                            vec![
+                                Arc::clone(&join_params.left),
+                                Arc::clone(&join_params.right),
+                            ],
+                            vec![join],
+                        )),
+                    ))
+                } else {
+                    Ok((
+                        scans,
+                        Arc::new(SparkPlan::new(
+                            spark_plan.plan_id,
+                            join,
+                            vec![
+                                Arc::clone(&join_params.left),
+                                Arc::clone(&join_params.right),
+                            ],
+                        )),
+                    ))
+                }
             }
             OpStruct::HashJoin(join) => {
                 let (join_params, scans) = self.parse_join_parameters(
diff --git a/spark/src/main/scala/org/apache/comet/CometSparkSessionExtensions.scala b/spark/src/main/scala/org/apache/comet/CometSparkSessionExtensions.scala
index 8bff6b5fbd..52a0d5e180 100644
--- a/spark/src/main/scala/org/apache/comet/CometSparkSessionExtensions.scala
+++ b/spark/src/main/scala/org/apache/comet/CometSparkSessionExtensions.scala
@@ -567,7 +567,7 @@ class CometSparkSessionExtensions
 
         case op: SortMergeJoinExec
             if CometConf.COMET_EXEC_SORT_MERGE_JOIN_ENABLED.get(conf) &&
-              op.children.forall(isCometNative(_)) =>
+              op.children.forall(isCometNative) =>
           val newOp = transform1(op)
           newOp match {
             case Some(nativeOp) =>
diff --git a/spark/src/main/scala/org/apache/comet/serde/QueryPlanSerde.scala b/spark/src/main/scala/org/apache/comet/serde/QueryPlanSerde.scala
index dc081b196b..7ed3725bed 100644
--- a/spark/src/main/scala/org/apache/comet/serde/QueryPlanSerde.scala
+++ b/spark/src/main/scala/org/apache/comet/serde/QueryPlanSerde.scala
@@ -2859,11 +2859,7 @@ object QueryPlanSerde extends Logging with ShimQueryPlanSerde with CometExprShim
           case RightOuter => JoinType.RightOuter
           case FullOuter => JoinType.FullOuter
           case LeftSemi => JoinType.LeftSemi
-          // TODO: DF SMJ with join condition fails TPCH q21
-          case LeftAnti if condition.isEmpty => JoinType.LeftAnti
-          case LeftAnti =>
-            withInfo(join, "LeftAnti SMJ join with condition is not supported")
-            return None
+          case LeftAnti => JoinType.LeftAnti
           case _ =>
             // Spark doesn't support other join types
             withInfo(op, s"Unsupported join type ${join.joinType}")
diff --git a/spark/src/test/scala/org/apache/comet/exec/CometJoinSuite.scala b/spark/src/test/scala/org/apache/comet/exec/CometJoinSuite.scala
index ad1aef4a8f..d756da1515 100644
--- a/spark/src/test/scala/org/apache/comet/exec/CometJoinSuite.scala
+++ b/spark/src/test/scala/org/apache/comet/exec/CometJoinSuite.scala
@@ -216,7 +216,7 @@ class CometJoinSuite extends CometTestBase {
           v.toDouble,
           v.toString,
           v % 2 == 0,
-          v.toString().getBytes,
+          v.toString.getBytes,
           Decimal(v))
 
       withParquetTable((0 until 10).map(i => manyTypes(i, i % 5)), "tbl_a") {
@@ -294,6 +294,7 @@ class CometJoinSuite extends CometTestBase {
 
   test("SortMergeJoin without join filter") {
     withSQLConf(
+      CometConf.COMET_EXEC_SORT_MERGE_JOIN_ENABLED.key -> "true",
       SQLConf.ADAPTIVE_AUTO_BROADCASTJOIN_THRESHOLD.key -> "-1",
       SQLConf.AUTO_BROADCASTJOIN_THRESHOLD.key -> "-1") {
       withParquetTable((0 until 10).map(i => (i, i % 5)), "tbl_a") {
@@ -338,9 +339,9 @@ class CometJoinSuite extends CometTestBase {
     }
   }
 
-  // https://github.com/apache/datafusion-comet/issues/398
-  ignore("SortMergeJoin with join filter") {
+  test("SortMergeJoin with join filter") {
     withSQLConf(
+      CometConf.COMET_EXEC_SORT_MERGE_JOIN_ENABLED.key -> "true",
       CometConf.COMET_EXEC_SORT_MERGE_JOIN_WITH_JOIN_FILTER_ENABLED.key -> "true",
       SQLConf.ADAPTIVE_AUTO_BROADCASTJOIN_THRESHOLD.key -> "-1",
       SQLConf.AUTO_BROADCASTJOIN_THRESHOLD.key -> "-1") {
@@ -391,9 +392,6 @@ class CometJoinSuite extends CometTestBase {
               "AND tbl_a._2 >= tbl_b._1")
           checkSparkAnswerAndOperator(df9)
 
-          // TODO: Enable these tests after fixing the issue:
-          // https://github.com/apache/datafusion-comet/issues/861
-          /*
           val df10 = sql(
             "SELECT * FROM tbl_a LEFT ANTI JOIN tbl_b ON tbl_a._2 = tbl_b._1 " +
               "AND tbl_a._2 >= tbl_b._1")
@@ -403,7 +401,6 @@ class CometJoinSuite extends CometTestBase {
             "SELECT * FROM tbl_b LEFT ANTI JOIN tbl_a ON tbl_a._2 = tbl_b._1 " +
               "AND tbl_a._2 >= tbl_b._1")
           checkSparkAnswerAndOperator(df11)
-           */
         }
       }
     }