org.apache.hadoop.hive.ql.parse.SemiJoinBranchInfo Maven / Gradle / Ivy
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* Licensed to the Apache Software Foundation (ASF) under one
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* 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,
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* See the License for the specific language governing permissions and
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*/
package org.apache.hadoop.hive.ql.parse;
import org.apache.hadoop.hive.ql.exec.TableScanOperator;
public class SemiJoinBranchInfo {
private TableScanOperator ts;
private boolean isHint;
// Default value is true, however, if an optimization deems this edge
// important, it should set this to false. This does not guarantee that
// the edge will stay, however, it increases the chances.
private boolean shouldRemove;
public SemiJoinBranchInfo(TableScanOperator ts) {
this.ts = ts;
isHint = false;
shouldRemove = true;
}
public SemiJoinBranchInfo(TableScanOperator ts, boolean isHint) {
this.ts = ts;
this.isHint = isHint;
shouldRemove = !isHint; // If hint is true, shouldRemove is redundant anyway
}
public TableScanOperator getTsOp() {
return ts;
}
public boolean getIsHint() {
return isHint;
}
public boolean getShouldRemove() {
return shouldRemove;
}
public void setShouldRemove(boolean shouldRemove) {
// The state only changes from true->false
// Once set to false, it may not change back to true
if (this.shouldRemove) {
this.shouldRemove = shouldRemove;
}
}
}