| /* |
| * 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.drill.exec.expr; |
| |
| import java.util.Iterator; |
| import java.util.List; |
| |
| import org.apache.drill.common.expression.ExpressionPosition; |
| import org.apache.drill.common.expression.FunctionHolderExpression; |
| import org.apache.drill.common.expression.LogicalExpression; |
| import org.apache.drill.common.expression.fn.FuncHolder; |
| import org.apache.drill.common.types.TypeProtos.MajorType; |
| import org.apache.drill.exec.expr.annotations.FunctionTemplate; |
| import org.apache.drill.exec.expr.fn.HiveFuncHolder; |
| |
| public class HiveFuncHolderExpr extends FunctionHolderExpression implements Iterable<LogicalExpression>{ |
| |
| private final HiveFuncHolder holder; |
| |
| public HiveFuncHolderExpr(String nameUsed, HiveFuncHolder holder, List<LogicalExpression> args, ExpressionPosition pos) { |
| super(nameUsed, pos, args); |
| this.holder = holder; |
| } |
| |
| @Override |
| public MajorType getMajorType() { |
| return holder.getReturnType(); |
| } |
| |
| @Override |
| public Iterator<LogicalExpression> iterator() { |
| return args.iterator(); |
| } |
| |
| @Override |
| public FuncHolder getHolder() { |
| return holder; |
| } |
| |
| @Override |
| public boolean isAggregating() { |
| return holder.isAggregating(); |
| } |
| |
| @Override |
| public boolean argConstantOnly(int i) { |
| // looks like hive UDF has no notion of constant argument input |
| return false; |
| } |
| |
| @Override |
| public boolean isRandom() { |
| return holder.isRandom(); |
| } |
| |
| @Override |
| public HiveFuncHolderExpr copy(List<LogicalExpression> args) { |
| return new HiveFuncHolderExpr(this.nameUsed, this.holder, args, this.getPosition()); |
| } |
| |
| @Override |
| public int getSelfCost() { |
| return FunctionTemplate.FunctionCostCategory.getDefault().getValue(); |
| } |
| |
| } |