/**
* 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.tajo.engine.planner.physical;
import org.apache.tajo.catalog.Column;
import org.apache.tajo.catalog.Schema;
import org.apache.tajo.engine.eval.AggregationFunctionCallEval;
import org.apache.tajo.engine.planner.logical.GroupbyNode;
import org.apache.tajo.worker.TaskAttemptContext;
import java.io.IOException;
public abstract class AggregationExec extends UnaryPhysicalExec {
protected GroupbyNode plan;
protected final int groupingKeyNum;
protected int groupingKeyIds[];
protected final int aggFunctionsNum;
protected final AggregationFunctionCallEval aggFunctions[];
protected Schema evalSchema;
public AggregationExec(final TaskAttemptContext context, GroupbyNode plan,
PhysicalExec child) throws IOException {
super(context, plan.getInSchema(), plan.getOutSchema(), child);
this.plan = plan;
evalSchema = plan.getOutSchema();
final Column [] keyColumns = plan.getGroupingColumns();
groupingKeyNum = keyColumns.length;
groupingKeyIds = new int[groupingKeyNum];
Column col;
for (int idx = 0; idx < plan.getGroupingColumns().length; idx++) {
col = keyColumns[idx];
groupingKeyIds[idx] = inSchema.getColumnId(col.getQualifiedName());
}
if (plan.hasAggFunctions()) {
aggFunctions = plan.getAggFunctions();
aggFunctionsNum = aggFunctions.length;
} else {
aggFunctions = new AggregationFunctionCallEval[0];
aggFunctionsNum = 0;
}
}
@Override
public void close() throws IOException {
super.close();
plan = null;
}
}