/** * 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 * <p/> * http://www.apache.org/licenses/LICENSE-2.0 * <p/> * 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.dataplatform.mds.hadoop.hive.pushdown; import java.util.List; import jp.co.yahoo.dataplatform.mds.spread.expression.IExpressionNode; import org.apache.hadoop.hive.ql.plan.ExprNodeDesc; import org.apache.hadoop.hive.ql.plan.ExprNodeColumnDesc; import org.apache.hadoop.hive.ql.plan.ExprNodeGenericFuncDesc; import jp.co.yahoo.dataplatform.mds.spread.expression.ExecuterNode; import jp.co.yahoo.dataplatform.mds.spread.expression.IExtractNode; import jp.co.yahoo.dataplatform.mds.spread.column.ColumnType; import jp.co.yahoo.dataplatform.mds.spread.column.filter.NotNullFilter; import jp.co.yahoo.dataplatform.mds.hadoop.hive.MDSColumnTypeUtil; public class NotNullHiveExpr implements IHiveExprNode{ private final List<ExprNodeDesc> nodeDescList; public NotNullHiveExpr( final List<ExprNodeDesc> nodeDescList ){ this.nodeDescList = nodeDescList; } @Override public void addChildNode( final ExprNodeGenericFuncDesc exprNodeDesc ){ throw new UnsupportedOperationException( "IHiveExprNode node can not have child node." ); } @Override public IExpressionNode getPushDownFilterNode(){ if( nodeDescList.size() != 1 ){ return null; } ExprNodeDesc columnDesc = nodeDescList.get( 0 ); if( ! ( columnDesc instanceof ExprNodeColumnDesc ) ){ return null; } IExtractNode extractNode = CreateExtractNodeUtil.getExtractNode( columnDesc ); if( extractNode == null ){ return null; } ColumnType targetColumnType = MDSColumnTypeUtil.typeInfoToColumnType( columnDesc.getTypeInfo() ); return new ExecuterNode( extractNode , new NotNullFilter( targetColumnType ) ); } }