| /* |
| * 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.beam.sdk.extensions.sql.impl.rel; |
| |
| import java.util.List; |
| import org.apache.beam.sdk.transforms.PTransform; |
| import org.apache.beam.sdk.values.PCollection; |
| import org.apache.beam.sdk.values.PCollectionList; |
| import org.apache.beam.sdk.values.Row; |
| import org.apache.calcite.plan.RelOptCluster; |
| import org.apache.calcite.plan.RelTraitSet; |
| import org.apache.calcite.rel.RelNode; |
| import org.apache.calcite.rel.core.Intersect; |
| import org.apache.calcite.rel.core.SetOp; |
| |
| /** |
| * {@code BeamRelNode} to replace a {@code Intersect} node. |
| * |
| * <p>This is used to combine two SELECT statements, but returns rows only from the first SELECT |
| * statement that are identical to a row in the second SELECT statement. |
| */ |
| public class BeamIntersectRel extends Intersect implements BeamRelNode { |
| public BeamIntersectRel( |
| RelOptCluster cluster, RelTraitSet traits, List<RelNode> inputs, boolean all) { |
| super(cluster, traits, inputs, all); |
| } |
| |
| @Override |
| public SetOp copy(RelTraitSet traitSet, List<RelNode> inputs, boolean all) { |
| return new BeamIntersectRel(getCluster(), traitSet, inputs, all); |
| } |
| |
| @Override |
| public PTransform<PCollectionList<Row>, PCollection<Row>> buildPTransform() { |
| return new BeamSetOperatorRelBase(this, BeamSetOperatorRelBase.OpType.INTERSECT, all); |
| } |
| } |