/**
* 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.io.orc;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hive.ql.exec.vector.VectorizedBatchUtil;
import org.apache.hadoop.hive.ql.exec.vector.VectorizedRowBatch;
import org.apache.hadoop.hive.ql.exec.vector.VectorizedRowBatchCtx;
import org.apache.hadoop.hive.ql.io.AcidInputFormat;
import org.apache.hadoop.hive.ql.io.RecordIdentifier;
import org.apache.hadoop.hive.ql.metadata.HiveException;
import org.apache.hadoop.hive.serde2.SerDeException;
import org.apache.hadoop.hive.serde2.objectinspector.ObjectInspector;
import org.apache.hadoop.hive.serde2.objectinspector.StructObjectInspector;
import org.apache.hadoop.io.DataOutputBuffer;
import org.apache.hadoop.io.NullWritable;
import org.apache.hadoop.mapred.*;
import java.io.IOException;
/**
* Implement a RecordReader that stitches together base and delta files to
* support tables and partitions stored in the ACID format. It works by using
* the non-vectorized ACID reader and moving the data into a vectorized row
* batch.
*/
class VectorizedOrcAcidRowReader
implements org.apache.hadoop.mapred.RecordReader<NullWritable,
VectorizedRowBatch> {
private final AcidInputFormat.RowReader<OrcStruct> innerReader;
private final RecordIdentifier key;
private final OrcStruct value;
private final VectorizedRowBatchCtx rowBatchCtx;
private final ObjectInspector objectInspector;
private final DataOutputBuffer buffer = new DataOutputBuffer();
VectorizedOrcAcidRowReader(AcidInputFormat.RowReader<OrcStruct> inner,
Configuration conf,
FileSplit split) throws IOException {
this.innerReader = inner;
this.key = inner.createKey();
this.rowBatchCtx = new VectorizedRowBatchCtx();
this.value = inner.createValue();
this.objectInspector = inner.getObjectInspector();
try {
rowBatchCtx.init(conf, split);
} catch (ClassNotFoundException e) {
throw new IOException("Failed to initialize context", e);
} catch (SerDeException e) {
throw new IOException("Failed to initialize context", e);
} catch (InstantiationException e) {
throw new IOException("Failed to initialize context", e);
} catch (IllegalAccessException e) {
throw new IOException("Failed to initialize context", e);
} catch (HiveException e) {
throw new IOException("Failed to initialize context", e);
}
}
@Override
public boolean next(NullWritable nullWritable,
VectorizedRowBatch vectorizedRowBatch
) throws IOException {
vectorizedRowBatch.reset();
buffer.reset();
if (!innerReader.next(key, value)) {
return false;
}
try {
rowBatchCtx.addPartitionColsToBatch(vectorizedRowBatch);
} catch (HiveException e) {
throw new IOException("Problem adding partition column", e);
}
try {
VectorizedBatchUtil.acidAddRowToBatch(value,
(StructObjectInspector) objectInspector,
vectorizedRowBatch.size++, vectorizedRowBatch, rowBatchCtx, buffer);
while (vectorizedRowBatch.size < vectorizedRowBatch.selected.length &&
innerReader.next(key, value)) {
VectorizedBatchUtil.acidAddRowToBatch(value,
(StructObjectInspector) objectInspector,
vectorizedRowBatch.size++, vectorizedRowBatch, rowBatchCtx, buffer);
}
} catch (HiveException he) {
throw new IOException("error iterating", he);
}
return true;
}
@Override
public NullWritable createKey() {
return NullWritable.get();
}
@Override
public VectorizedRowBatch createValue() {
try {
return rowBatchCtx.createVectorizedRowBatch();
} catch (HiveException e) {
throw new RuntimeException("Error creating a batch", e);
}
}
@Override
public long getPos() throws IOException {
return innerReader.getPos();
}
@Override
public void close() throws IOException {
innerReader.close();
}
@Override
public float getProgress() throws IOException {
return innerReader.getProgress();
}
}