| /* |
| * 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 java.util.ArrayList; |
| import java.util.List; |
| import java.util.stream.Collectors; |
| import org.apache.beam.sdk.extensions.sql.impl.rel.BeamAggregationRel; |
| import org.apache.beam.sdk.extensions.sql.impl.rel.BeamLogicalConvention; |
| 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.plan.volcano.RelSubset; |
| 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.Aggregate; |
| import org.apache.beam.vendor.calcite.v1_20_0.org.apache.calcite.rel.core.Calc; |
| import org.apache.beam.vendor.calcite.v1_20_0.org.apache.calcite.rel.core.Filter; |
| import org.apache.beam.vendor.calcite.v1_20_0.org.apache.calcite.rel.core.Project; |
| 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.rex.RexCall; |
| import org.apache.beam.vendor.calcite.v1_20_0.org.apache.calcite.rex.RexNode; |
| import org.apache.beam.vendor.calcite.v1_20_0.org.apache.calcite.sql.SqlKind; |
| import org.apache.beam.vendor.calcite.v1_20_0.org.apache.calcite.tools.RelBuilderFactory; |
| |
| /** |
| * Aggregation rule that doesn't include projection. |
| * |
| * <p>Doesn't support windowing, as we extract window information from projection node. |
| * |
| * <p>{@link BeamAggregationRule} supports projection and windowing. |
| */ |
| public class BeamBasicAggregationRule extends RelOptRule { |
| public static final BeamBasicAggregationRule INSTANCE = |
| new BeamBasicAggregationRule(Aggregate.class, RelFactories.LOGICAL_BUILDER); |
| |
| public BeamBasicAggregationRule( |
| Class<? extends Aggregate> aggregateClass, RelBuilderFactory relBuilderFactory) { |
| super(operand(aggregateClass, operand(RelNode.class, any())), relBuilderFactory, null); |
| } |
| |
| @Override |
| public void onMatch(RelOptRuleCall call) { |
| Aggregate aggregate = call.rel(0); |
| RelNode relNode = call.rel(1); |
| |
| if (relNode instanceof Project || relNode instanceof Calc || relNode instanceof Filter) { |
| if (isWindowed(relNode) || hasWindowedParents(relNode)) { |
| // This case is expected to get handled by the 'BeamAggregationRule' |
| return; |
| } |
| } |
| |
| RelNode newTableScan = relNode.copy(relNode.getTraitSet(), relNode.getInputs()); |
| |
| call.transformTo( |
| new BeamAggregationRel( |
| aggregate.getCluster(), |
| aggregate.getTraitSet().replace(BeamLogicalConvention.INSTANCE), |
| convert( |
| newTableScan, newTableScan.getTraitSet().replace(BeamLogicalConvention.INSTANCE)), |
| aggregate.indicator, |
| aggregate.getGroupSet(), |
| aggregate.getGroupSets(), |
| aggregate.getAggCallList(), |
| null, |
| -1)); |
| } |
| |
| private static boolean isWindowed(RelNode node) { |
| List<RexNode> projects = null; |
| |
| if (node instanceof Project) { |
| projects = new ArrayList<>(((Project) node).getProjects()); |
| } else if (node instanceof Calc) { |
| projects = |
| ((Calc) node) |
| .getProgram().getProjectList().stream() |
| .map( |
| rexLocalRef -> |
| ((Calc) node).getProgram().getExprList().get(rexLocalRef.getIndex())) |
| .collect(Collectors.toList()); |
| } |
| |
| if (projects != null) { |
| for (RexNode projNode : projects) { |
| if (!(projNode instanceof RexCall)) { |
| continue; |
| } |
| |
| SqlKind sqlKind = ((RexCall) projNode).op.kind; |
| if (sqlKind == SqlKind.SESSION || sqlKind == SqlKind.HOP || sqlKind == SqlKind.TUMBLE) { |
| return true; |
| } |
| } |
| } |
| |
| return false; |
| } |
| |
| private static boolean hasWindowedParents(RelNode node) { |
| List<RelNode> parents = new ArrayList<>(); |
| |
| for (RelNode inputNode : node.getInputs()) { |
| if (inputNode instanceof RelSubset) { |
| parents.addAll(((RelSubset) inputNode).getParentRels()); |
| parents.addAll(((RelSubset) inputNode).getRelList()); |
| } |
| } |
| |
| for (RelNode parent : parents) { |
| if (isWindowed(parent)) { |
| return true; |
| } |
| } |
| |
| return false; |
| } |
| } |