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...n/java/org/apache/flink/table/planner/plan/rules/logical/AggregateReduceGroupingRule.java
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| /* | ||
| * 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.flink.table.planner.plan.rules.logical; | ||
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| import org.apache.flink.table.planner.functions.sql.FlinkSqlOperatorTable; | ||
| import org.apache.flink.table.planner.plan.metadata.FlinkRelMetadataQuery; | ||
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|
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| import com.google.common.collect.ImmutableList; | ||
| import org.apache.calcite.plan.RelOptRuleCall; | ||
| import org.apache.calcite.plan.RelRule; | ||
| import org.apache.calcite.rel.RelCollations; | ||
| import org.apache.calcite.rel.RelNode; | ||
| import org.apache.calcite.rel.core.Aggregate; | ||
| import org.apache.calcite.rel.core.Aggregate.Group; | ||
| import org.apache.calcite.rel.core.AggregateCall; | ||
| import org.apache.calcite.rel.core.RelFactories; | ||
| import org.apache.calcite.rel.type.RelDataType; | ||
| import org.apache.calcite.rex.RexNode; | ||
| import org.apache.calcite.tools.RelBuilder; | ||
| import org.apache.calcite.util.ImmutableBitSet; | ||
| import org.immutables.value.Value; | ||
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|
||
| import java.util.HashMap; | ||
| import java.util.List; | ||
| import java.util.Map; | ||
| import java.util.stream.Collectors; | ||
| import java.util.stream.IntStream; | ||
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|
||
| /** | ||
| * Planner rule that reduces unless grouping columns. | ||
| * | ||
| * <p>Find (minimum) unique group for the grouping columns, and use it as new grouping columns. | ||
| */ | ||
| @Value.Enclosing | ||
| public class AggregateReduceGroupingRule | ||
| extends RelRule<AggregateReduceGroupingRule.AggregateReduceGroupingRuleConfig> { | ||
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| public static final AggregateReduceGroupingRule INSTANCE = | ||
| AggregateReduceGroupingRule.AggregateReduceGroupingRuleConfig.DEFAULT.toRule(); | ||
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| protected AggregateReduceGroupingRule(AggregateReduceGroupingRuleConfig config) { | ||
| super(config); | ||
| } | ||
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| @Override | ||
| public boolean matches(RelOptRuleCall call) { | ||
| Aggregate agg = call.rel(0); | ||
| return agg.getGroupCount() > 1 && agg.getGroupType() == Group.SIMPLE; | ||
| } | ||
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| @Override | ||
| public void onMatch(RelOptRuleCall call) { | ||
| Aggregate agg = call.rel(0); | ||
| RelDataType aggRowType = agg.getRowType(); | ||
| RelNode input = agg.getInput(); | ||
| RelDataType inputRowType = input.getRowType(); | ||
| ImmutableBitSet originalGrouping = agg.getGroupSet(); | ||
| FlinkRelMetadataQuery fmq = FlinkRelMetadataQuery.reuseOrCreate(call.getMetadataQuery()); | ||
| ImmutableBitSet newGrouping = fmq.getUniqueGroups(input, originalGrouping); | ||
| ImmutableBitSet uselessGrouping = originalGrouping.except(newGrouping); | ||
| if (uselessGrouping.isEmpty()) { | ||
| return; | ||
| } | ||
|
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| // new agg: new grouping + aggCalls for dropped grouping + original aggCalls | ||
| Map<Integer, Integer> indexOldToNewMap = new HashMap<>(); | ||
| List<Integer> newGroupingList = newGrouping.toList(); | ||
| int idxOfNewGrouping = 0; | ||
| int idxOfAggCallsForDroppedGrouping = newGroupingList.size(); | ||
| int index = 0; | ||
| for (int column : originalGrouping) { | ||
| if (newGroupingList.contains(column)) { | ||
| indexOldToNewMap.put(index, idxOfNewGrouping); | ||
| idxOfNewGrouping++; | ||
| } else { | ||
| indexOldToNewMap.put(index, idxOfAggCallsForDroppedGrouping); | ||
| idxOfAggCallsForDroppedGrouping++; | ||
| } | ||
| index++; | ||
| } | ||
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| assert (indexOldToNewMap.size() == originalGrouping.cardinality()); | ||
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| // the indices of aggCalls (or NamedProperties for WindowAggregate) do not change | ||
| for (int i = originalGrouping.cardinality(); i < aggRowType.getFieldCount(); i++) { | ||
| indexOldToNewMap.put(i, i); | ||
| } | ||
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| List<AggregateCall> aggCallsForDroppedGrouping = | ||
| uselessGrouping.asList().stream() | ||
| .map( | ||
| column -> { | ||
| RelDataType fieldType = | ||
| inputRowType.getFieldList().get(column).getType(); | ||
| String fieldName = inputRowType.getFieldNames().get(column); | ||
| return AggregateCall.create( | ||
| FlinkSqlOperatorTable.AUXILIARY_GROUP, | ||
| false, | ||
| false, | ||
| false, | ||
| ImmutableList.of(column), | ||
| -1, | ||
| null, | ||
| RelCollations.EMPTY, | ||
| fieldType, | ||
| fieldName); | ||
| }) | ||
| .collect(Collectors.toList()); | ||
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| aggCallsForDroppedGrouping.addAll(agg.getAggCallList()); | ||
| Aggregate newAgg = | ||
| agg.copy( | ||
| agg.getTraitSet(), | ||
| input, | ||
| newGrouping, | ||
| ImmutableList.of(newGrouping), | ||
| aggCallsForDroppedGrouping); | ||
| RelBuilder builder = call.builder(); | ||
| builder.push(newAgg); | ||
| List<RexNode> projects = | ||
| IntStream.range(0, newAgg.getRowType().getFieldCount()) | ||
| .mapToObj( | ||
| i -> { | ||
| Integer refIndex = indexOldToNewMap.get(i); | ||
| if (refIndex == null) { | ||
| throw new IllegalArgumentException("Illegal index: " + i); | ||
| } | ||
| return builder.field(refIndex); | ||
| }) | ||
| .collect(Collectors.toList()); | ||
| builder.project(projects, aggRowType.getFieldNames()); | ||
| call.transformTo(builder.build()); | ||
| } | ||
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||
| /** Rule configuration. */ | ||
| @Value.Immutable(singleton = false) | ||
| public interface AggregateReduceGroupingRuleConfig extends RelRule.Config { | ||
| AggregateReduceGroupingRule.AggregateReduceGroupingRuleConfig DEFAULT = | ||
| ImmutableAggregateReduceGroupingRule.AggregateReduceGroupingRuleConfig.builder() | ||
| .relBuilderFactory(RelFactories.LOGICAL_BUILDER) | ||
| .operandSupplier(b0 -> b0.operand(Aggregate.class).anyInputs()) | ||
| .description("AggregateReduceGroupingRule") | ||
| .build(); | ||
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| @Override | ||
| default AggregateReduceGroupingRule toRule() { | ||
| return new AggregateReduceGroupingRule(this); | ||
| } | ||
| } | ||
| } | ||
|
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| /*object AggregateReduceGroupingRule { | ||
| val INSTANCE = new AggregateReduceGroupingRule(RelFactories.LOGICAL_BUILDER) | ||
| }*/ | ||
| /*( | ||
| operand(classOf[Aggregate], any), | ||
| relBuilderFactory, | ||
| "AggregateReduceGroupingRule") {*/ |
129 changes: 0 additions & 129 deletions
129
...scala/org/apache/flink/table/planner/plan/rules/logical/AggregateReduceGroupingRule.scala
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