org.apache.hudi.hive.ddl.DDLExecutor Maven / Gradle / Ivy

Go to download
/*
 * 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.hudi.hive.ddl;

import org.apache.hudi.common.util.collection.Pair;

import org.apache.parquet.schema.MessageType;

import java.util.List;
import java.util.Map;

/**
 * DDLExecutor is the interface which defines the ddl functions for Hive.
 * There are two main implementations one is QueryBased other is based on HiveMetaStore
 * QueryBasedDDLExecutor also has two implementations namely HiveQL based and other JDBC based.
 */
public interface DDLExecutor extends AutoCloseable {

  /**
   * @param databaseName name of database to be created.
   */
  void createDatabase(String databaseName);

  /**
   * Creates a table with the following properties.
   *
   * @param tableName
   * @param storageSchema
   * @param inputFormatClass
   * @param outputFormatClass
   * @param serdeClass
   * @param serdeProperties
   * @param tableProperties
   */
  void createTable(String tableName, MessageType storageSchema, String inputFormatClass,
                   String outputFormatClass, String serdeClass,
                   Map serdeProperties, Map tableProperties);

  /**
   * Updates the table with the newSchema.
   *
   * @param tableName
   * @param newSchema
   */
  void updateTableDefinition(String tableName, MessageType newSchema);

  /**
   * Fetches tableSchema for a table.
   *
   * @param tableName
   * @return
   */
  Map getTableSchema(String tableName);

  /**
   * Adds partition to table.
   *
   * @param tableName
   * @param partitionsToAdd
   */
  void addPartitionsToTable(String tableName, List partitionsToAdd);

  /**
   * Updates partitions for a given table.
   *
   * @param tableName
   * @param changedPartitions
   */
  void updatePartitionsToTable(String tableName, List changedPartitions);

  /**
   * Drop partitions for a given table.
   *
   * @param tableName
   * @param partitionsToDrop
   */
  void dropPartitionsToTable(String tableName, List partitionsToDrop);

  /**
   * update table comments
   *
   * @param tableName
   * @param newSchema Map key: field name, Map value: [field type, field comment]
   */
  void updateTableComments(String tableName, Map> newSchema);
}