| /* |
| * 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.drill.exec.physical.impl.aggregate; |
| |
| import java.util.List; |
| |
| import org.apache.drill.common.expression.LogicalExpression; |
| import org.apache.drill.exec.compile.TemplateClassDefinition; |
| import org.apache.drill.exec.expr.ClassGenerator; |
| import org.apache.drill.exec.ops.FragmentContext; |
| import org.apache.drill.exec.ops.OperatorContext; |
| import org.apache.drill.exec.physical.config.HashAggregate; |
| import org.apache.drill.exec.physical.impl.common.HashTableConfig; |
| import org.apache.drill.exec.record.RecordBatch; |
| import org.apache.drill.exec.record.RecordBatch.IterOutcome; |
| import org.apache.drill.exec.record.TypedFieldId; |
| import org.apache.drill.exec.record.VectorContainer; |
| |
| public interface HashAggregator { |
| |
| TemplateClassDefinition<HashAggregator> TEMPLATE_DEFINITION = |
| new TemplateClassDefinition<HashAggregator>(HashAggregator.class, HashAggTemplate.class); |
| |
| enum AggOutcome { |
| RETURN_OUTCOME, CLEANUP_AND_RETURN, UPDATE_AGGREGATOR, CALL_WORK_AGAIN |
| } |
| |
| // For returning results from outputCurrentBatch |
| // OK - batch returned, NONE - end of data, RESTART - call again, EMIT - like OK but EMIT |
| enum AggIterOutcome { AGG_OK, AGG_NONE, AGG_RESTART, AGG_EMIT } |
| |
| void setup(HashAggregate hashAggrConfig, HashTableConfig htConfig, FragmentContext context, |
| OperatorContext oContext, RecordBatch incoming, HashAggBatch outgoing, |
| LogicalExpression[] valueExprs, List<TypedFieldId> valueFieldIds, ClassGenerator<?> cg, |
| TypedFieldId[] keyFieldIds, VectorContainer outContainer, int extraRowBytes); |
| |
| IterOutcome getOutcome(); |
| |
| int getOutputCount(); |
| |
| AggOutcome doWork(); |
| |
| void cleanup(); |
| |
| boolean allFlushed(); |
| |
| boolean buildComplete(); |
| |
| boolean handlingEmit(); |
| |
| AggIterOutcome outputCurrentBatch(); |
| |
| boolean earlyOutput(); |
| |
| RecordBatch getNewIncoming(); |
| |
| void adjustOutputCount(int outputBatchSize, int oldRowWidth, int newRowWidth); |
| } |