Github user rdblue commented on a diff in the pull request:

    https://github.com/apache/spark/pull/21306#discussion_r237971288
  
    --- Diff: 
sql/catalyst/src/main/java/org/apache/spark/sql/catalog/v2/Table.java ---
    @@ -0,0 +1,46 @@
    +/*
    + * 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.catalog.v2;
    +
    +import org.apache.spark.sql.types.StructType;
    +
    +import java.util.List;
    +import java.util.Map;
    +
    +/**
    + * Represents table metadata from a {@link TableCatalog} or other table 
sources.
    + */
    +public interface Table {
    +  /**
    +   * Return the table properties.
    +   * @return this table's map of string properties
    +   */
    +  Map<String, String> properties();
    +
    +  /**
    +   * Return the table schema.
    +   * @return this table's schema as a struct type
    +   */
    +  StructType schema();
    +
    +  /**
    +   * Return the table partitioning transforms.
    +   * @return this table's partitioning transforms
    +   */
    +  List<PartitionTransform> partitioning();
    --- End diff --
    
    Sure


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