org.apache.hadoop.hive.ql.optimizer.metainfo.annotation.AnnotateWithOpTraits Maven / Gradle / Ivy
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* 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
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* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
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* See the License for the specific language governing permissions and
* limitations under the License.
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package org.apache.hadoop.hive.ql.optimizer.metainfo.annotation;
import java.util.ArrayList;
import java.util.LinkedHashMap;
import java.util.Map;
import org.apache.hadoop.hive.ql.exec.DemuxOperator;
import org.apache.hadoop.hive.ql.exec.GroupByOperator;
import org.apache.hadoop.hive.ql.exec.JoinOperator;
import org.apache.hadoop.hive.ql.exec.MapJoinOperator;
import org.apache.hadoop.hive.ql.exec.MuxOperator;
import org.apache.hadoop.hive.ql.exec.ReduceSinkOperator;
import org.apache.hadoop.hive.ql.exec.SMBMapJoinOperator;
import org.apache.hadoop.hive.ql.exec.SelectOperator;
import org.apache.hadoop.hive.ql.exec.TableScanOperator;
import org.apache.hadoop.hive.ql.exec.UnionOperator;
import org.apache.hadoop.hive.ql.lib.DefaultRuleDispatcher;
import org.apache.hadoop.hive.ql.lib.Dispatcher;
import org.apache.hadoop.hive.ql.lib.GraphWalker;
import org.apache.hadoop.hive.ql.lib.Node;
import org.apache.hadoop.hive.ql.lib.NodeProcessor;
import org.apache.hadoop.hive.ql.lib.PreOrderWalker;
import org.apache.hadoop.hive.ql.lib.Rule;
import org.apache.hadoop.hive.ql.lib.RuleRegExp;
import org.apache.hadoop.hive.ql.optimizer.Transform;
import org.apache.hadoop.hive.ql.optimizer.metainfo.annotation.OpTraitsRulesProcFactory;
import org.apache.hadoop.hive.ql.parse.ParseContext;
import org.apache.hadoop.hive.ql.parse.SemanticException;
/*
* This class annotates each operator with its traits. The OpTraits class
* specifies the traits that are populated for each operator.
*/
public class AnnotateWithOpTraits implements Transform {
@Override
public ParseContext transform(ParseContext pctx) throws SemanticException {
AnnotateOpTraitsProcCtx annotateCtx = new AnnotateOpTraitsProcCtx(pctx);
// create a walker which walks the tree in a DFS manner while maintaining the
// operator stack. The dispatcher generates the plan from the operator tree
Map opRules = new LinkedHashMap();
opRules.put(new RuleRegExp("TS", TableScanOperator.getOperatorName() + "%"),
OpTraitsRulesProcFactory.getTableScanRule());
opRules.put(new RuleRegExp("RS", ReduceSinkOperator.getOperatorName() + "%"),
OpTraitsRulesProcFactory.getReduceSinkRule());
opRules.put(new RuleRegExp("JOIN", JoinOperator.getOperatorName() + "%"),
OpTraitsRulesProcFactory.getJoinRule());
opRules.put(new RuleRegExp("MAPJOIN", MapJoinOperator.getOperatorName() + "%"),
OpTraitsRulesProcFactory.getMultiParentRule());
opRules.put(new RuleRegExp("SMB", SMBMapJoinOperator.getOperatorName() + "%"),
OpTraitsRulesProcFactory.getMultiParentRule());
opRules.put(new RuleRegExp("MUX", MuxOperator.getOperatorName() + "%"),
OpTraitsRulesProcFactory.getMultiParentRule());
opRules.put(new RuleRegExp("DEMUX", DemuxOperator.getOperatorName() + "%"),
OpTraitsRulesProcFactory.getMultiParentRule());
opRules.put(new RuleRegExp("UNION", UnionOperator.getOperatorName() + "%"),
OpTraitsRulesProcFactory.getMultiParentRule());
opRules.put(new RuleRegExp("GBY", GroupByOperator.getOperatorName() + "%"),
OpTraitsRulesProcFactory.getGroupByRule());
opRules.put(new RuleRegExp("SEL", SelectOperator.getOperatorName() + "%"),
OpTraitsRulesProcFactory.getSelectRule());
// The dispatcher fires the processor corresponding to the closest matching
// rule and passes the context along
Dispatcher disp = new DefaultRuleDispatcher(OpTraitsRulesProcFactory.getDefaultRule(), opRules,
annotateCtx);
GraphWalker ogw = new PreOrderWalker(disp);
// Create a list of topop nodes
ArrayList topNodes = new ArrayList();
topNodes.addAll(pctx.getTopOps().values());
ogw.startWalking(topNodes, null);
return pctx;
}
}