| /* |
| * 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.rule; |
| |
| import org.apache.beam.sdk.extensions.sql.impl.rel.BeamJoinRel; |
| import org.apache.beam.vendor.calcite.v1_26_0.org.apache.calcite.plan.RelOptRule; |
| import org.apache.beam.vendor.calcite.v1_26_0.org.apache.calcite.plan.RelOptRuleCall; |
| import org.apache.beam.vendor.calcite.v1_26_0.org.apache.calcite.rel.RelNode; |
| import org.apache.beam.vendor.calcite.v1_26_0.org.apache.calcite.rel.core.Join; |
| import org.apache.beam.vendor.calcite.v1_26_0.org.apache.calcite.rel.core.RelFactories; |
| import org.apache.beam.vendor.calcite.v1_26_0.org.apache.calcite.rel.logical.LogicalJoin; |
| import org.apache.beam.vendor.calcite.v1_26_0.org.apache.calcite.rel.rules.JoinPushThroughJoinRule; |
| |
| /** |
| * This is exactly similar to {@link |
| * org.apache.beam.vendor.calcite.v1_26_0.org.apache.calcite.rel.rules.JoinPushThroughJoinRule}. It |
| * only checks if the condition of the new bottom join is supported. |
| */ |
| public class BeamJoinPushThroughJoinRule extends RelOptRule { |
| /** Instance of the rule that works on logical joins only, and pushes to the right. */ |
| public static final RelOptRule RIGHT = |
| new BeamJoinPushThroughJoinRule( |
| "BeamJoinPushThroughJoinRule:right", JoinPushThroughJoinRule.RIGHT); |
| |
| /** Instance of the rule that works on logical joins only, and pushes to the left. */ |
| public static final RelOptRule LEFT = |
| new BeamJoinPushThroughJoinRule( |
| "BeamJoinPushThroughJoinRule:left", JoinPushThroughJoinRule.LEFT); |
| |
| private final RelOptRule base; |
| |
| /** Creates a JoinPushThroughJoinRule. */ |
| private BeamJoinPushThroughJoinRule(String description, RelOptRule base) { |
| super( |
| operand( |
| LogicalJoin.class, operand(LogicalJoin.class, any()), operand(RelNode.class, any())), |
| RelFactories.LOGICAL_BUILDER, |
| description); |
| |
| this.base = base; |
| } |
| |
| @Override |
| public void onMatch(RelOptRuleCall call) { |
| base.onMatch( |
| new JoinRelOptRuleCall( |
| call, |
| rel -> { |
| Join topJoin = (Join) rel.getInput(0); |
| Join bottomJoin = (Join) ((Join) rel.getInput(0)).getLeft(); |
| return BeamJoinRel.isJoinLegal(topJoin) && BeamJoinRel.isJoinLegal(bottomJoin); |
| })); |
| } |
| } |