org.apache.hadoop.hive.ql.ppd.OpWalkerInfo Maven / Gradle / Ivy
/**
* 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.ppd;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import org.apache.hadoop.hive.ql.exec.FilterOperator;
import org.apache.hadoop.hive.ql.exec.Operator;
import org.apache.hadoop.hive.ql.lib.NodeProcessorCtx;
import org.apache.hadoop.hive.ql.parse.ParseContext;
import org.apache.hadoop.hive.ql.plan.OperatorDesc;
/**
* Context class for operator walker of predicate pushdown.
*/
public class OpWalkerInfo implements NodeProcessorCtx {
/**
* Operator to Pushdown Predicates Map. This keeps track of the final pushdown
* predicates for each operator as you walk the Op Graph from child to parent
*/
private final HashMap, ExprWalkerInfo>
opToPushdownPredMap;
private final ParseContext pGraphContext;
private final List candidateFilterOps;
public OpWalkerInfo(ParseContext pGraphContext) {
this.pGraphContext = pGraphContext;
opToPushdownPredMap = new HashMap, ExprWalkerInfo>();
candidateFilterOps = new ArrayList();
}
public ExprWalkerInfo getPrunedPreds(Operator op) {
return opToPushdownPredMap.get(op);
}
public ExprWalkerInfo putPrunedPreds(Operator op,
ExprWalkerInfo value) {
return opToPushdownPredMap.put(op, value);
}
public ParseContext getParseContext() {
return pGraphContext;
}
public List getCandidateFilterOps() {
return candidateFilterOps;
}
public void addCandidateFilterOp(FilterOperator fop) {
candidateFilterOps.add(fop);
}
}