/**
* 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.optimizer.ppr;
import java.util.HashMap;
import org.apache.hadoop.hive.ql.exec.TableScanOperator;
import org.apache.hadoop.hive.ql.lib.NodeProcessorCtx;
import org.apache.hadoop.hive.ql.plan.ExprNodeDesc;
/**
* Context class for operator tree walker for partition pruner.
* TODO: this class may be not useful.
*/
public class OpWalkerCtx implements NodeProcessorCtx {
/**
* Map from tablescan operator to partition pruning predicate that is
* initialized from the ParseContext.
*/
private final HashMap<TableScanOperator, ExprNodeDesc> opToPartPruner;
/**
* Constructor.
*/
public OpWalkerCtx(HashMap<TableScanOperator, ExprNodeDesc> opToPartPruner) {
this.opToPartPruner = opToPartPruner;
}
public HashMap<TableScanOperator, ExprNodeDesc> getOpToPartPruner() {
return opToPartPruner;
}
}