| /* |
| * 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.sdk.extensions.sql.impl.rel.BeamLogicalConvention; |
| import org.apache.beam.sdk.extensions.sql.impl.rel.BeamSideInputLookupJoinRel; |
| import org.apache.beam.vendor.calcite.v1_20_0.org.apache.calcite.plan.Convention; |
| 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.convert.ConverterRule; |
| 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.logical.LogicalJoin; |
| |
| /** |
| * Rule to convert {@code LogicalJoin} node to {@code BeamSideInputLookupJoinRel} node. |
| * |
| * <p>This rule is matched when any of the inputs to {@code LogicalJoin} node are Seekable |
| */ |
| public class BeamSideInputLookupJoinRule extends ConverterRule { |
| public static final BeamSideInputLookupJoinRule INSTANCE = new BeamSideInputLookupJoinRule(); |
| |
| public BeamSideInputLookupJoinRule() { |
| super( |
| LogicalJoin.class, |
| Convention.NONE, |
| BeamLogicalConvention.INSTANCE, |
| "BeamSideInputLookupJoinRule"); |
| } |
| |
| // The Rule is Matched when any of the inputs are Seekable |
| @Override |
| public boolean matches(RelOptRuleCall call) { |
| RelNode joinRel = call.rel(0); |
| boolean matches = BeamJoinRel.containsSeekableInput(joinRel); |
| return (matches); |
| } |
| |
| @Override |
| public RelNode convert(RelNode rel) { |
| Join join = (Join) rel; |
| |
| return (new BeamSideInputLookupJoinRel( |
| 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())); |
| } |
| } |