jp.co.yahoo.yosegi.hive.pushdown.HiveExprNotNode 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 jp.co.yahoo.yosegi.hive.pushdown;
import jp.co.yahoo.yosegi.spread.expression.IExpressionNode;
import jp.co.yahoo.yosegi.spread.expression.NotExpressionNode;
import org.apache.hadoop.hive.ql.plan.ExprNodeColumnDesc;
import org.apache.hadoop.hive.ql.plan.ExprNodeDesc;
import org.apache.hadoop.hive.ql.plan.ExprNodeFieldDesc;
import org.apache.hadoop.hive.ql.plan.ExprNodeGenericFuncDesc;
import org.apache.hadoop.hive.ql.udf.generic.GenericUDF;
import org.apache.hadoop.hive.ql.udf.generic.GenericUDFOPAnd;
import org.apache.hadoop.hive.ql.udf.generic.GenericUDFOPNot;
import org.apache.hadoop.hive.ql.udf.generic.GenericUDFOPOr;
import java.util.ArrayList;
import java.util.List;
public class HiveExprNotNode implements IHiveExprNode {
private final List childNodeList = new ArrayList();
public HiveExprNotNode() {}
/**
* Create Not condition and child filter condition.
*/
public HiveExprNotNode( final List childExprNodeDesc ) {
for ( ExprNodeDesc nodeChild : childExprNodeDesc ) {
if ( nodeChild instanceof ExprNodeGenericFuncDesc ) {
addChildNode( (ExprNodeGenericFuncDesc)nodeChild );
} else if ( ( nodeChild instanceof ExprNodeColumnDesc )
|| ( nodeChild instanceof ExprNodeFieldDesc ) ) {
childNodeList.add( new BooleanHiveExpr( nodeChild ) );
} else {
childNodeList.add( new UnsupportHiveExpr() );
}
}
}
@Override
public void addChildNode( final ExprNodeGenericFuncDesc exprNodeDesc ) {
GenericUDF udf = exprNodeDesc.getGenericUDF();
if ( udf instanceof GenericUDFOPAnd ) {
childNodeList.add( new HiveExprAndNode( exprNodeDesc.getChildren() ) );
} else if ( udf instanceof GenericUDFOPOr ) {
childNodeList.add( new HiveExprOrNode( exprNodeDesc.getChildren() ) );
} else if ( udf instanceof GenericUDFOPNot ) {
childNodeList.add( new HiveExprNotNode( exprNodeDesc.getChildren() ) );
} else {
childNodeList.add( HiveExprFactory.get( exprNodeDesc , udf , exprNodeDesc.getChildren() ) );
}
}
@Override
public IExpressionNode getPushDownFilterNode() {
IExpressionNode result = new NotExpressionNode();
for ( IHiveExprNode childHiveExprNode : childNodeList ) {
IExpressionNode childNode = childHiveExprNode.getPushDownFilterNode();
if ( childNode != null ) {
result.addChildNode( childNode );
}
}
return result;
}
}