| /** |
| * 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.tajo.algebra; |
| |
| |
| import com.google.common.base.Objects; |
| import com.google.common.base.Preconditions; |
| import com.google.gson.annotations.Expose; |
| import com.google.gson.annotations.SerializedName; |
| |
| public class SetOperation extends BinaryOperator { |
| @Expose @SerializedName("IsDistinct") |
| private boolean distinct = true; |
| |
| public SetOperation(OpType type, Expr left, Expr right, boolean distinct) { |
| super(type, left, right); |
| Preconditions.checkArgument(type == OpType.Union || |
| type == OpType.Intersect || |
| type == OpType.Except); |
| this.distinct = distinct; |
| } |
| |
| public boolean isDistinct() { |
| return distinct; |
| } |
| |
| public void unsetDistinct() { |
| distinct = false; |
| } |
| |
| public int hashCode() { |
| return Objects.hashCode(distinct, getLeft(), getRight()); |
| } |
| |
| boolean equalsTo(Expr expr) { |
| SetOperation another = (SetOperation) expr; |
| return distinct == another.distinct; |
| } |
| } |