diff --git a/fe/fe-core/src/main/java/org/apache/doris/datasource/ExternalTable.java b/fe/fe-core/src/main/java/org/apache/doris/datasource/ExternalTable.java
index aebe980afb9f37..6c72d0a67d4732 100644
--- a/fe/fe-core/src/main/java/org/apache/doris/datasource/ExternalTable.java
+++ b/fe/fe-core/src/main/java/org/apache/doris/datasource/ExternalTable.java
@@ -394,7 +394,7 @@ public SelectedPartitions initSelectedPartitions(Optional<MvccSnapshot> snapshot
      * @param snapshot if not support mvcc, ignore this
      * @return partitionName ==> PartitionItem
      */
-    public Map<String, PartitionItem> getNameToPartitionItems(Optional<MvccSnapshot> snapshot) {
+    protected Map<String, PartitionItem> getNameToPartitionItems(Optional<MvccSnapshot> snapshot) {
         return Collections.emptyMap();
     }
 
diff --git a/fe/fe-core/src/main/java/org/apache/doris/datasource/hive/HMSExternalTable.java b/fe/fe-core/src/main/java/org/apache/doris/datasource/hive/HMSExternalTable.java
index 2115f47d777b80..134ad362fa1eed 100644
--- a/fe/fe-core/src/main/java/org/apache/doris/datasource/hive/HMSExternalTable.java
+++ b/fe/fe-core/src/main/java/org/apache/doris/datasource/hive/HMSExternalTable.java
@@ -306,7 +306,7 @@ public boolean supportInternalPartitionPruned() {
     }
 
     @Override
-    public Map<String, PartitionItem> getNameToPartitionItems(Optional<MvccSnapshot> snapshot) {
+    protected Map<String, PartitionItem> getNameToPartitionItems(Optional<MvccSnapshot> snapshot) {
         return getNameToPartitionItems();
     }
 
diff --git a/fe/fe-core/src/main/java/org/apache/doris/datasource/maxcompute/MaxComputeExternalTable.java b/fe/fe-core/src/main/java/org/apache/doris/datasource/maxcompute/MaxComputeExternalTable.java
index 8db54fc1ce546b..0f748f59e927bc 100644
--- a/fe/fe-core/src/main/java/org/apache/doris/datasource/maxcompute/MaxComputeExternalTable.java
+++ b/fe/fe-core/src/main/java/org/apache/doris/datasource/maxcompute/MaxComputeExternalTable.java
@@ -92,13 +92,12 @@ public List<Column> getPartitionColumns() {
     }
 
     @Override
-    public Map<String, PartitionItem> getNameToPartitionItems(Optional<MvccSnapshot> snapshot) {
+    protected Map<String, PartitionItem> getNameToPartitionItems(Optional<MvccSnapshot> snapshot) {
         if (getPartitionColumns().isEmpty()) {
             return Collections.emptyMap();
         }
 
         TablePartitionValues tablePartitionValues = getPartitionValues();
-
         Map<Long, PartitionItem> idToPartitionItem = tablePartitionValues.getIdToPartitionItem();
         Map<Long, String> idToNameMap = tablePartitionValues.getPartitionIdToNameMap();
 
@@ -109,7 +108,7 @@ public Map<String, PartitionItem> getNameToPartitionItems(Optional<MvccSnapshot>
         return nameToPartitionItem;
     }
 
-    public TablePartitionValues getPartitionValues() {
+    private TablePartitionValues getPartitionValues() {
         makeSureInitialized();
         Optional<SchemaCacheValue> schemaCacheValue = getSchemaCacheValue();
         if (!schemaCacheValue.isPresent()) {
diff --git a/fe/fe-core/src/main/java/org/apache/doris/datasource/maxcompute/source/MaxComputeScanNode.java b/fe/fe-core/src/main/java/org/apache/doris/datasource/maxcompute/source/MaxComputeScanNode.java
index d3f02e4207b80a..e177e9d8b7c88c 100644
--- a/fe/fe-core/src/main/java/org/apache/doris/datasource/maxcompute/source/MaxComputeScanNode.java
+++ b/fe/fe-core/src/main/java/org/apache/doris/datasource/maxcompute/source/MaxComputeScanNode.java
@@ -92,19 +92,21 @@ public class MaxComputeScanNode extends FileQueryScanNode {
     @Setter
     private SelectedPartitions selectedPartitions = null;
 
+    // For new planner
     public MaxComputeScanNode(PlanNodeId id, TupleDescriptor desc,
             SelectedPartitions selectedPartitions, boolean needCheckColumnPriv) {
         this(id, desc, "MCScanNode", StatisticalType.MAX_COMPUTE_SCAN_NODE,
                 selectedPartitions, needCheckColumnPriv);
     }
 
+    // For old planner
     public MaxComputeScanNode(PlanNodeId id, TupleDescriptor desc, boolean needCheckColumnPriv) {
         this(id, desc, "MCScanNode", StatisticalType.MAX_COMPUTE_SCAN_NODE,
                 SelectedPartitions.NOT_PRUNED, needCheckColumnPriv);
     }
 
-    public MaxComputeScanNode(PlanNodeId id, TupleDescriptor desc, String planNodeName,
-                              StatisticalType statisticalType, SelectedPartitions selectedPartitions,
+    private MaxComputeScanNode(PlanNodeId id, TupleDescriptor desc, String planNodeName,
+            StatisticalType statisticalType, SelectedPartitions selectedPartitions,
             boolean needCheckColumnPriv) {
         super(id, desc, planNodeName, statisticalType, needCheckColumnPriv);
         table = (MaxComputeExternalTable) desc.getTable();
@@ -132,6 +134,8 @@ private void setScanParams(TFileRangeDesc rangeDesc, MaxComputeSplit maxComputeS
         rangeDesc.setSize(maxComputeSplit.getLength());
     }
 
+    // Return false if no need to read any partition data.
+    // Return true if need to read partition data.
     boolean createTableBatchReadSession() throws UserException {
         List<String> requiredPartitionColumns = new ArrayList<>();
         List<String> orderedRequiredDataColumns = new ArrayList<>();
diff --git a/fe/fe-core/src/main/java/org/apache/doris/planner/SingleNodePlanner.java b/fe/fe-core/src/main/java/org/apache/doris/planner/SingleNodePlanner.java
index a82ab4248ec600..4091640066c1d7 100644
--- a/fe/fe-core/src/main/java/org/apache/doris/planner/SingleNodePlanner.java
+++ b/fe/fe-core/src/main/java/org/apache/doris/planner/SingleNodePlanner.java
@@ -1992,7 +1992,6 @@ private PlanNode createScanNode(Analyzer analyzer, TableRef tblRef, SelectStmt s
                 scanNode = new TrinoConnectorScanNode(ctx.getNextNodeId(), tblRef.getDesc(), true);
                 break;
             case MAX_COMPUTE_EXTERNAL_TABLE:
-                // TODO: support max compute scan node
                 scanNode = new MaxComputeScanNode(ctx.getNextNodeId(), tblRef.getDesc(), true);
                 break;
             case ES_EXTERNAL_TABLE: