org.apache.hadoop.hive.ql.parse.GlobalLimitCtx 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.parse;
import org.apache.hadoop.hive.ql.plan.LimitDesc;
/**
* context for pruning inputs. populated by GlobalLimitOptimizer
*/
public class GlobalLimitCtx {
private boolean enable;
private int globalLimit;
private boolean hasTransformOrUDTF;
private LimitDesc lastReduceLimitDesc;
public GlobalLimitCtx() {
reset();
}
public int getGlobalLimit() {
return globalLimit;
}
public boolean ifHasTransformOrUDTF() {
return hasTransformOrUDTF;
}
public void setHasTransformOrUDTF(boolean hasTransformOrUDTF) {
this.hasTransformOrUDTF = hasTransformOrUDTF;
}
public LimitDesc getLastReduceLimitDesc() {
return lastReduceLimitDesc;
}
public void setLastReduceLimitDesc(LimitDesc lastReduceLimitDesc) {
this.lastReduceLimitDesc = lastReduceLimitDesc;
}
public boolean isEnable() {
return enable;
}
public void enableOpt(int globalLimit) {
this.enable = true;
this.globalLimit = globalLimit;
}
public void disableOpt() {
this.enable = false;
this.globalLimit = -1;
this.lastReduceLimitDesc = null;
}
public void reset() {
enable = false;
globalLimit = -1;
hasTransformOrUDTF = false;
lastReduceLimitDesc = null;
}
}