org.apache.hadoop.hive.ql.exec.vector.VectorMapOperator Maven / Gradle / Ivy
The newest version!
/**
* 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.exec.vector;
import org.apache.hadoop.hive.ql.exec.MapOperator;
import org.apache.hadoop.hive.ql.exec.mr.ExecMapperContext;
import org.apache.hadoop.hive.ql.metadata.HiveException;
import org.apache.hadoop.io.Writable;
public class VectorMapOperator extends MapOperator {
private static final long serialVersionUID = 1L;
@Override
public void process(Writable value) throws HiveException {
// A mapper can span multiple files/partitions.
// The serializers need to be reset if the input file changed
ExecMapperContext context = getExecContext();
if (context != null && context.inputFileChanged()) {
// The child operators cleanup if input file has changed
cleanUpInputFileChanged();
}
// The row has been converted to comply with table schema, irrespective of partition schema.
// So, use tblOI (and not partOI) for forwarding
try {
int childrenDone = 0;
for (MapOpCtx current : currentCtxs) {
if (!current.forward(value)) {
childrenDone++;
}
}
rowsForwarded(childrenDone, ((VectorizedRowBatch)value).size);
} catch (Exception e) {
throw new HiveException("Hive Runtime Error while processing row ", e);
}
}
}