org.apache.hadoop.hive.ql.exec.ExportTask 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
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  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

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  distributed under the License is distributed on an "AS IS" BASIS,
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  See the License for the specific language governing permissions and
  limitations under the License.
 */
package org.apache.hadoop.hive.ql.exec;

import org.apache.hadoop.hive.ql.DriverContext;
import org.apache.hadoop.hive.ql.ErrorMsg;
import org.apache.hadoop.hive.ql.metadata.Hive;
import org.apache.hadoop.hive.ql.parse.SemanticException;
import org.apache.hadoop.hive.ql.parse.repl.dump.TableExport;
import org.apache.hadoop.hive.ql.plan.ExportWork;
import org.apache.hadoop.hive.ql.plan.api.StageType;
import com.facebook.presto.hive.$internal.org.slf4j.Logger;
import com.facebook.presto.hive.$internal.org.slf4j.LoggerFactory;

import java.io.Serializable;

public class ExportTask extends Task implements Serializable {

  private static final long serialVersionUID = 1L;
  private Logger LOG = LoggerFactory.getLogger(ExportTask.class);

  public ExportTask() {
    super();
  }

  @Override
  public String getName() {
    return "EXPORT";
  }

  @Override
  protected int execute(DriverContext driverContext) {
    try {
      // Also creates the root directory
      TableExport.Paths exportPaths =
          new TableExport.Paths(work.getAstRepresentationForErrorMsg(), work.getExportRootDir(),
              conf, false);
      Hive db = getHive();
      LOG.debug("Exporting data to: {}", exportPaths.getExportRootDir());
      work.acidPostProcess(db);
      TableExport tableExport = new TableExport(
          exportPaths, work.getTableSpec(), work.getReplicationSpec(), db, null, conf
      );
      if (!tableExport.write()) {
        throw new SemanticException(ErrorMsg.EXIM_FOR_NON_NATIVE.getMsg());
      }
    } catch (Exception e) {
      LOG.error("failed", e);
      setException(e);
      return 1;
    }
    return 0;
  }

  @Override
  public StageType getType() {
    // TODO: Modify Thrift IDL to generate export stage if needed
    return StageType.REPL_DUMP;
  }
}