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68 changes: 68 additions & 0 deletions
68
...ore/src/main/java/org/apache/doris/nereids/rules/rewrite/PushLimitThroughDistinctAgg.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,68 @@ | ||
| // 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. | ||
|
|
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| package org.apache.doris.nereids.rules.rewrite; | ||
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| import org.apache.doris.nereids.rules.Rule; | ||
| import org.apache.doris.nereids.rules.RuleType; | ||
| import org.apache.doris.nereids.trees.plans.Plan; | ||
| import org.apache.doris.nereids.trees.plans.logical.LogicalAggregate; | ||
| import org.apache.doris.nereids.trees.plans.logical.LogicalLimit; | ||
| import org.apache.doris.nereids.trees.plans.logical.LogicalProject; | ||
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| import com.google.common.collect.ImmutableList; | ||
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| import java.util.List; | ||
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| /** | ||
| * limit ->agg(without agg functions) -> any(not limit) | ||
| * => | ||
| * limit -> agg -> limit -> any | ||
| */ | ||
| public class PushLimitThroughDistinctAgg implements RewriteRuleFactory { | ||
| @Override | ||
| public List<Rule> buildRules() { | ||
| return ImmutableList.of( | ||
| logicalLimit(logicalAggregate().when(LogicalAggregate::isDistinct)) | ||
| .then(limit -> { | ||
| LogicalAggregate<? extends Plan> aggregate = limit.child(); | ||
| Plan aggChild = aggregate.child(); | ||
| if (aggChild instanceof LogicalLimit) { | ||
| return null; | ||
| } | ||
| LogicalLimit childLimit = new LogicalLimit(limit.getLimit() + limit.getOffset(), | ||
| 0, limit.getPhase(), aggChild); | ||
| aggregate = aggregate.withChildren(ImmutableList.of(childLimit)); | ||
| return limit.withChildren(ImmutableList.of(aggregate)); | ||
| }).toRule(RuleType.PUSH_DOWN_LIMIT_THROUGH_DISTINCT_AGG), | ||
| logicalLimit(logicalProject(logicalAggregate().when(LogicalAggregate::isDistinct))) | ||
| .then(limit -> { | ||
| LogicalProject<? extends Plan> project = limit.child(); | ||
| LogicalAggregate<? extends Plan> aggregate = (LogicalAggregate) project.child(); | ||
| Plan aggChild = aggregate.child(); | ||
| if (aggChild instanceof LogicalLimit) { | ||
| return null; | ||
| } | ||
| LogicalLimit childLimit = new LogicalLimit(limit.getLimit() + limit.getOffset(), | ||
| 0, limit.getPhase(), aggChild); | ||
| aggregate = aggregate.withChildren(ImmutableList.of(childLimit)); | ||
| project = project.withChildren(ImmutableList.of(aggregate)); | ||
| return limit.withChildren(ImmutableList.of(project)); | ||
| }).toRule(RuleType.PUSH_DOWN_LIMIT_THROUGH_DISTINCT_AGG) | ||
| ); | ||
| } | ||
| } |
33 changes: 23 additions & 10 deletions
33
regression-test/data/nereids_tpch_p0/tpch/push_topn_to_agg.out
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,13 +1,26 @@ | ||
| -- This file is automatically generated. You should know what you did if you want to edit this | ||
| -- !stable_1 -- | ||
| 0 | ||
| 1 | ||
| -- !limit_agg_distinct -- | ||
| PhysicalResultSink | ||
| --PhysicalLimit[GLOBAL] | ||
| ----PhysicalDistribute[DistributionSpecGather] | ||
| ------PhysicalLimit[LOCAL] | ||
| --------hashAgg[GLOBAL] | ||
| ----------PhysicalDistribute[DistributionSpecHash] | ||
| ------------hashAgg[LOCAL] | ||
| --------------PhysicalLimit[LOCAL] | ||
| ----------------PhysicalProject | ||
| ------------------PhysicalOlapScan[orders] | ||
|
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||
| -- !stable_2 -- | ||
| 0 | ||
| 1 | ||
|
|
||
| -- !stable_3 -- | ||
| 0 | ||
| 1 | ||
| -- !limit_project_agg_distinct -- | ||
| PhysicalResultSink | ||
| --PhysicalLimit[GLOBAL] | ||
| ----PhysicalDistribute[DistributionSpecGather] | ||
| ------PhysicalLimit[LOCAL] | ||
| --------PhysicalProject | ||
| ----------hashAgg[GLOBAL] | ||
| ------------PhysicalDistribute[DistributionSpecHash] | ||
| --------------hashAgg[LOCAL] | ||
| ----------------PhysicalLimit[LOCAL] | ||
| ------------------PhysicalProject | ||
| --------------------PhysicalOlapScan[orders] | ||
|
|
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