org.apache.hadoop.hive.ql.parse.repl.load.message.UpdatePartColStatHandler Maven / Gradle / Ivy

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/*
 * 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.hadoop.hive.ql.parse.repl.load.message;

import org.apache.hadoop.hive.metastore.api.ColumnStatistics;
import org.apache.hadoop.hive.metastore.api.ColumnStatisticsDesc;
import org.apache.hadoop.hive.metastore.messaging.UpdatePartitionColumnStatMessage;
import org.apache.hadoop.hive.ql.exec.Task;
import org.apache.hadoop.hive.ql.exec.repl.util.ReplUtils;
import org.apache.hadoop.hive.ql.parse.SemanticException;

import java.io.Serializable;
import java.util.List;

/**
 * UpdatePartColStatHandler
 * Target(Load) side handler for partition stat update event
 */
public class UpdatePartColStatHandler extends AbstractMessageHandler {
  @Override
  public List> handle(Context context)
      throws SemanticException {
    UpdatePartitionColumnStatMessage upcsm =
            deserializer.getUpdatePartitionColumnStatMessage(context.dmd.getPayload());

    // Update tablename and database name in the statistics object
    ColumnStatistics colStats = upcsm.getColumnStatistics();
    // In older version of hive, engine might not have set.
    if (colStats.getEngine() == null) {
      colStats.setEngine(org.apache.hadoop.hive.conf.Constants.HIVE_ENGINE);
    }
    ColumnStatisticsDesc colStatsDesc = colStats.getStatsDesc();
    if (!context.isDbNameEmpty()) {
      colStatsDesc.setDbName(context.dbName);
      updatedMetadata.set(context.dmd.getEventTo().toString(), context.dbName, colStatsDesc.getTableName(),
                  null);
    }

    try {
      return ReplUtils.addTasksForLoadingColStats(colStats, context.hiveConf, updatedMetadata,
                                                  upcsm.getTableObject(), upcsm.getWriteId(),
                                                  context.getDumpDirectory(),
                                                  context.getMetricCollector());
    } catch(Exception e) {
      throw new SemanticException(e);
    }
  }
}