walterddr commented on a change in pull request #8340:
URL: https://github.com/apache/pinot/pull/8340#discussion_r830497625



##########
File path: 
pinot-query-planner/src/main/java/org/apache/pinot/query/planner/nodes/TableScanNode.java
##########
@@ -0,0 +1,57 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.pinot.query.planner.nodes;
+
+import java.util.Collections;
+import java.util.List;
+import java.util.stream.Collectors;
+import org.apache.calcite.rel.logical.LogicalTableScan;
+import org.apache.calcite.rel.type.RelDataTypeField;
+
+
+public class TableScanNode extends AbstractStageNode {
+  private final List<String> _tableName;

Review comment:
       per calcite's convension usually a singleton list is used here for 
extensibility. think of a union table scan node if we were to extend table scan 
if we want to support `SELECT * from t1 UNION ALL SELECT * from t2`




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