| /* |
| * 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.BeamCoGBKJoinRel; |
| import org.apache.beam.sdk.extensions.sql.impl.rel.BeamJoinRel; |
| import org.apache.beam.sdk.extensions.sql.impl.rel.BeamLogicalConvention; |
| import org.apache.beam.sdk.values.PCollection; |
| import org.apache.beam.vendor.calcite.v1_20_0.org.apache.calcite.plan.RelOptRule; |
| import org.apache.beam.vendor.calcite.v1_20_0.org.apache.calcite.plan.RelOptRuleCall; |
| import org.apache.beam.vendor.calcite.v1_20_0.org.apache.calcite.rel.RelNode; |
| import org.apache.beam.vendor.calcite.v1_20_0.org.apache.calcite.rel.core.Join; |
| import org.apache.beam.vendor.calcite.v1_20_0.org.apache.calcite.rel.core.RelFactories; |
| import org.apache.beam.vendor.calcite.v1_20_0.org.apache.calcite.rel.logical.LogicalJoin; |
| |
| /** |
| * Rule to convert {@code LogicalJoin} node to {@code BeamCoGBKJoinRel} node. |
| * |
| * <p>This rule is matched when both the inputs to {@code LogicalJoin} node have the same |
| * Boundedness i.e. either when both the inputs are {@code PCollection.IsBounded.BOUNDED} or when |
| * both the inputs are {@code PCollection.IsBounded.UNBOUNDED} |
| * |
| * <p>As {@code BeamSideInputLookupJoinRel} also matches this condition when both the inputs are |
| * {@code PCollection.IsBounded.BOUNDED}, to avoid conflicts, this rule is not matched when any of |
| * the inputs to {@code LogicalJoin} node are Seekable. |
| */ |
| public class BeamCoGBKJoinRule extends RelOptRule { |
| public static final BeamCoGBKJoinRule INSTANCE = new BeamCoGBKJoinRule(); |
| |
| private BeamCoGBKJoinRule() { |
| super( |
| operand(LogicalJoin.class, operand(RelNode.class, any()), operand(RelNode.class, any())), |
| RelFactories.LOGICAL_BUILDER, |
| "BeamCoGBKJoinRule"); |
| } |
| |
| @Override |
| public boolean matches(RelOptRuleCall call) { |
| // The Rule does not match when any of the inputs are Seekable |
| if (BeamJoinRel.containsSeekableInput(call.rel(0))) { |
| return false; |
| } |
| PCollection.IsBounded boundednessOfLeftRel = BeamJoinRel.getBoundednessOfRelNode(call.rel(1)); |
| PCollection.IsBounded boundednessOfRightRel = BeamJoinRel.getBoundednessOfRelNode(call.rel(2)); |
| return (boundednessOfLeftRel == boundednessOfRightRel); |
| } |
| |
| @Override |
| public void onMatch(RelOptRuleCall call) { |
| Join join = (Join) call.rel(0); |
| |
| BeamCoGBKJoinRel rel = |
| new BeamCoGBKJoinRel( |
| join.getCluster(), |
| join.getTraitSet().replace(BeamLogicalConvention.INSTANCE), |
| convert( |
| join.getLeft(), |
| join.getLeft().getTraitSet().replace(BeamLogicalConvention.INSTANCE)), |
| convert( |
| join.getRight(), |
| join.getRight().getTraitSet().replace(BeamLogicalConvention.INSTANCE)), |
| join.getCondition(), |
| join.getVariablesSet(), |
| join.getJoinType()); |
| call.transformTo(rel); |
| } |
| } |