| /* |
| * 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.gearpump.sql.rule; |
| |
| import org.apache.calcite.plan.Convention; |
| import org.apache.calcite.rel.RelNode; |
| import org.apache.calcite.rel.convert.ConverterRule; |
| import org.apache.calcite.rel.core.Join; |
| import org.apache.calcite.rel.logical.LogicalJoin; |
| import org.apache.gearpump.sql.rel.GearJoinRel; |
| import org.apache.gearpump.sql.rel.GearLogicalConvention; |
| |
| public class GearJoinRule extends ConverterRule { |
| |
| public static final GearJoinRule INSTANCE = new GearJoinRule(); |
| |
| private GearJoinRule() { |
| super(LogicalJoin.class, Convention.NONE, |
| GearLogicalConvention.INSTANCE, "GearJoinRule"); |
| } |
| |
| @Override |
| public RelNode convert(RelNode rel) { |
| Join join = (Join) rel; |
| return new GearJoinRel( |
| join.getCluster(), |
| join.getTraitSet().replace(GearLogicalConvention.INSTANCE), |
| convert(join.getLeft(), |
| join.getLeft().getTraitSet().replace(GearLogicalConvention.INSTANCE)), |
| convert(join.getRight(), |
| join.getRight().getTraitSet().replace(GearLogicalConvention.INSTANCE)), |
| join.getCondition(), |
| join.getVariablesSet(), |
| join.getJoinType() |
| ); |
| } |
| } |