jzhuge commented on code in PR #37556:
URL: https://github.com/apache/spark/pull/37556#discussion_r1014522636


##########
sql/catalyst/src/main/java/org/apache/spark/sql/connector/catalog/View.java:
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@@ -0,0 +1,69 @@
+/*
+ * 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.spark.sql.connector.catalog;
+
+import java.util.Map;
+
+import org.apache.spark.annotation.DeveloperApi;
+import org.apache.spark.sql.types.StructType;
+
+/**
+ * An interface representing a persisted view.
+ */
+@DeveloperApi
+public interface View {
+  /**
+   * A name to identify this view.
+   */
+  String name();
+
+  /**
+   * The view query SQL text.
+   */
+  String sql();
+
+  /**
+   * The current catalog when the view is created.
+   */
+  String currentCatalog();
+
+  /**
+   * The current namespace when the view is created.
+   */
+  String[] currentNamespace();
+
+  /**
+   * The schema for the SQL text when the view is created.
+   */
+  StructType schema();
+
+  /**
+   * The view column aliases.
+   */
+  String[] columnAliases();
+

Review Comment:
   Pushed a few changes:
   - Updated Javadoc for View.schema to indicate aliases applied
   - Added `View.queryColumnNames` to store output column names, useful for 
SELECT star queries
   - Renamed `View.sql` to `View.query` because "query" is more accurate to 
describe the SELECT query for the view.



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