org.apache.hadoop.hive.ql.io.parquet.MapredParquetOutputFormat Maven / Gradle / Ivy
/**
* Licensed 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.io.parquet;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Properties;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.hive.ql.io.HiveOutputFormat;
import org.apache.hadoop.hive.ql.io.IOConstants;
import org.apache.hadoop.hive.ql.io.parquet.convert.HiveSchemaConverter;
import org.apache.hadoop.hive.ql.io.parquet.write.DataWritableWriteSupport;
import org.apache.hadoop.hive.ql.io.parquet.write.ParquetRecordWriterWrapper;
import org.apache.hadoop.hive.serde2.io.ParquetHiveRecord;
import org.apache.hadoop.hive.serde2.typeinfo.TypeInfo;
import org.apache.hadoop.hive.serde2.typeinfo.TypeInfoUtils;
import org.apache.hadoop.hive.shims.ShimLoader;
import org.apache.hadoop.io.Writable;
import org.apache.hadoop.mapred.FileOutputFormat;
import org.apache.hadoop.mapred.JobConf;
import org.apache.hadoop.mapred.RecordWriter;
import org.apache.hadoop.mapreduce.OutputFormat;
import org.apache.hadoop.util.Progressable;
import parquet.hadoop.ParquetOutputFormat;
/**
*
* A Parquet OutputFormat for Hive (with the deprecated package mapred)
*
*/
public class MapredParquetOutputFormat extends FileOutputFormat implements
HiveOutputFormat {
private static final Log LOG = LogFactory.getLog(MapredParquetOutputFormat.class);
protected ParquetOutputFormat realOutputFormat;
public MapredParquetOutputFormat() {
realOutputFormat = new ParquetOutputFormat(new DataWritableWriteSupport());
}
public MapredParquetOutputFormat(final OutputFormat mapreduceOutputFormat) {
realOutputFormat = (ParquetOutputFormat) mapreduceOutputFormat;
}
@Override
public void checkOutputSpecs(final FileSystem ignored, final JobConf job) throws IOException {
realOutputFormat.checkOutputSpecs(ShimLoader.getHadoopShims().getHCatShim().createJobContext(job, null));
}
@Override
public RecordWriter getRecordWriter(
final FileSystem ignored,
final JobConf job,
final String name,
final Progressable progress
) throws IOException {
throw new RuntimeException("Should never be used");
}
/**
*
* Create the parquet schema from the hive schema, and return the RecordWriterWrapper which
* contains the real output format
*/
@Override
public org.apache.hadoop.hive.ql.exec.FileSinkOperator.RecordWriter getHiveRecordWriter(
final JobConf jobConf,
final Path finalOutPath,
final Class valueClass,
final boolean isCompressed,
final Properties tableProperties,
final Progressable progress) throws IOException {
LOG.info("creating new record writer..." + this);
final String columnNameProperty = tableProperties.getProperty(IOConstants.COLUMNS);
final String columnTypeProperty = tableProperties.getProperty(IOConstants.COLUMNS_TYPES);
List columnNames;
List columnTypes;
if (columnNameProperty.length() == 0) {
columnNames = new ArrayList();
} else {
columnNames = Arrays.asList(columnNameProperty.split(","));
}
if (columnTypeProperty.length() == 0) {
columnTypes = new ArrayList();
} else {
columnTypes = TypeInfoUtils.getTypeInfosFromTypeString(columnTypeProperty);
}
DataWritableWriteSupport.setSchema(HiveSchemaConverter.convert(columnNames, columnTypes), jobConf);
return getParquerRecordWriterWrapper(realOutputFormat, jobConf, finalOutPath.toString(),
progress,tableProperties);
}
protected ParquetRecordWriterWrapper getParquerRecordWriterWrapper(
ParquetOutputFormat realOutputFormat,
JobConf jobConf,
String finalOutPath,
Progressable progress,
Properties tableProperties
) throws IOException {
return new ParquetRecordWriterWrapper(realOutputFormat, jobConf, finalOutPath.toString(),
progress,tableProperties);
}
}