| /** |
| * 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.pinot.core.operator.combine; |
| |
| import java.util.List; |
| import java.util.concurrent.ExecutorService; |
| import org.apache.pinot.core.common.Operator; |
| import org.apache.pinot.core.operator.blocks.results.AggregationResultsBlock; |
| import org.apache.pinot.core.query.aggregation.function.AggregationFunction; |
| import org.apache.pinot.core.query.request.context.QueryContext; |
| |
| |
| /** |
| * Combine operator for aggregation queries. |
| */ |
| @SuppressWarnings({"rawtypes", "unchecked"}) |
| public class AggregationCombineOperator extends BaseCombineOperator<AggregationResultsBlock> { |
| private static final String EXPLAIN_NAME = "COMBINE_AGGREGATE"; |
| |
| public AggregationCombineOperator(List<Operator> operators, QueryContext queryContext, |
| ExecutorService executorService) { |
| super(operators, queryContext, executorService); |
| } |
| |
| @Override |
| public String toExplainString() { |
| return EXPLAIN_NAME; |
| } |
| |
| @Override |
| protected void mergeResultsBlocks(AggregationResultsBlock mergedBlock, AggregationResultsBlock blockToMerge) { |
| AggregationFunction[] aggregationFunctions = mergedBlock.getAggregationFunctions(); |
| List<Object> mergedResults = mergedBlock.getResults(); |
| List<Object> resultsToMerge = blockToMerge.getResults(); |
| assert aggregationFunctions != null && mergedResults != null && resultsToMerge != null; |
| |
| int numAggregationFunctions = aggregationFunctions.length; |
| for (int i = 0; i < numAggregationFunctions; i++) { |
| mergedResults.set(i, aggregationFunctions[i].merge(mergedResults.get(i), resultsToMerge.get(i))); |
| } |
| } |
| } |