-
Notifications
You must be signed in to change notification settings - Fork 3.7k
[feat](nereids)push Limit to local agg #34853
New issue
Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.
By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.
Already on GitHub? Sign in to your account
Merged
Merged
Changes from all commits
Commits
Show all changes
4 commits
Select commit
Hold shift + click to select a range
File filter
Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
There are no files selected for viewing
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
177 changes: 177 additions & 0 deletions
177
fe/fe-core/src/main/java/org/apache/doris/nereids/processor/post/PushTopnToAgg.java
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,177 @@ | ||
| // 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. | ||
| // This file is copied from | ||
| // https://github.com/apache/impala/blob/branch-2.9.0/fe/src/main/java/org/apache/impala/AggregationNode.java | ||
| // and modified by Doris | ||
|
|
||
| package org.apache.doris.nereids.processor.post; | ||
|
|
||
| import org.apache.doris.nereids.CascadesContext; | ||
| import org.apache.doris.nereids.properties.DistributionSpecGather; | ||
| import org.apache.doris.nereids.properties.OrderKey; | ||
| import org.apache.doris.nereids.trees.expressions.Expression; | ||
| import org.apache.doris.nereids.trees.plans.AggMode; | ||
| import org.apache.doris.nereids.trees.plans.Plan; | ||
| import org.apache.doris.nereids.trees.plans.physical.PhysicalDistribute; | ||
| import org.apache.doris.nereids.trees.plans.physical.PhysicalHashAggregate; | ||
| import org.apache.doris.nereids.trees.plans.physical.PhysicalHashAggregate.TopnPushInfo; | ||
| import org.apache.doris.nereids.trees.plans.physical.PhysicalLimit; | ||
| import org.apache.doris.nereids.trees.plans.physical.PhysicalProject; | ||
| import org.apache.doris.nereids.trees.plans.physical.PhysicalTopN; | ||
| import org.apache.doris.qe.ConnectContext; | ||
|
|
||
| import org.apache.hadoop.util.Lists; | ||
|
|
||
| import java.util.List; | ||
| import java.util.stream.Collectors; | ||
|
|
||
| /** | ||
| * Add SortInfo to Agg. This SortInfo is used as boundary, not used to sort elements. | ||
| * example | ||
| * sql: select count(*) from orders group by o_clerk order by o_clerk limit 1; | ||
| * plan: topn(1) -> aggGlobal -> shuffle -> aggLocal -> scan | ||
| * optimization: aggLocal and aggGlobal only need to generate the smallest row with respect to o_clerk. | ||
| * | ||
| * TODO: the following case is not covered: | ||
| * sql: select sum(o_shippriority) from orders group by o_clerk limit 1; | ||
| * plan: limit -> aggGlobal -> shuffle -> aggLocal -> scan | ||
| * aggGlobal may receive partial aggregate results, and hence is not supported now | ||
| * instance1: input (key=2, v=1) => localAgg => (2, 1) => aggGlobal inst1 => (2, 1) | ||
| * instance2: input (key=1, v=1), (key=2, v=2) => localAgg inst2 => (1, 1) | ||
| * (2,1),(1,1) => limit => may output (2, 1), which is not complete, missing (2, 2) in instance2 | ||
| * | ||
| *TOPN: | ||
| * Precondition: topn orderkeys are the prefix of group keys | ||
| * TODO: topnKeys could be subset of groupKeys. This will be implemented in future | ||
| * Pattern 2-phase agg: | ||
| * topn -> aggGlobal -> distribute -> aggLocal | ||
| * => | ||
| * topn(n) -> aggGlobal(topn=n) -> distribute -> aggLocal(topn=n) | ||
| * Pattern 1-phase agg: | ||
| * topn->agg->Any(not agg) -> topn -> agg(topn=n) -> any | ||
| * | ||
| * LIMIT: | ||
| * Pattern 1: limit->agg(1phase)->any | ||
| * Pattern 2: limit->agg(global)->gather->agg(local) | ||
| */ | ||
| public class PushTopnToAgg extends PlanPostProcessor { | ||
| @Override | ||
| public Plan visitPhysicalTopN(PhysicalTopN<? extends Plan> topN, CascadesContext ctx) { | ||
| topN.child().accept(this, ctx); | ||
| if (ConnectContext.get().getSessionVariable().topnOptLimitThreshold <= topN.getLimit() + topN.getOffset()) { | ||
| return topN; | ||
| } | ||
| Plan topnChild = topN.child(); | ||
| if (topnChild instanceof PhysicalProject) { | ||
| topnChild = topnChild.child(0); | ||
| } | ||
| if (topnChild instanceof PhysicalHashAggregate) { | ||
| PhysicalHashAggregate<? extends Plan> upperAgg = (PhysicalHashAggregate<? extends Plan>) topnChild; | ||
| List<OrderKey> orderKeys = tryGenerateOrderKeyByGroupKeyAndTopnKey(topN, upperAgg); | ||
| if (!orderKeys.isEmpty()) { | ||
|
|
||
| if (upperAgg.getAggPhase().isGlobal() && upperAgg.getAggMode() == AggMode.BUFFER_TO_RESULT) { | ||
| upperAgg.setTopnPushInfo(new TopnPushInfo( | ||
| orderKeys, | ||
| topN.getLimit() + topN.getOffset())); | ||
| if (upperAgg.child() instanceof PhysicalDistribute | ||
| && upperAgg.child().child(0) instanceof PhysicalHashAggregate) { | ||
| PhysicalHashAggregate<? extends Plan> bottomAgg = | ||
| (PhysicalHashAggregate<? extends Plan>) upperAgg.child().child(0); | ||
| bottomAgg.setTopnPushInfo(new TopnPushInfo( | ||
| orderKeys, | ||
| topN.getLimit() + topN.getOffset())); | ||
| } | ||
| } else if (upperAgg.getAggPhase().isLocal() && upperAgg.getAggMode() == AggMode.INPUT_TO_RESULT) { | ||
| // one phase agg | ||
| upperAgg.setTopnPushInfo(new TopnPushInfo( | ||
| orderKeys, | ||
| topN.getLimit() + topN.getOffset())); | ||
| } | ||
| } | ||
| } | ||
| return topN; | ||
| } | ||
|
|
||
| /** | ||
| return true, if topn order-key is prefix of agg group-key, ignore asc/desc and null_first | ||
| TODO order-key can be subset of group-key. BE does not support now. | ||
| */ | ||
| private List<OrderKey> tryGenerateOrderKeyByGroupKeyAndTopnKey(PhysicalTopN<? extends Plan> topN, | ||
| PhysicalHashAggregate<? extends Plan> agg) { | ||
| List<OrderKey> orderKeys = Lists.newArrayListWithCapacity(agg.getGroupByExpressions().size()); | ||
| if (topN.getOrderKeys().size() > agg.getGroupByExpressions().size()) { | ||
| return orderKeys; | ||
| } | ||
| List<Expression> topnKeys = topN.getOrderKeys().stream() | ||
| .map(OrderKey::getExpr).collect(Collectors.toList()); | ||
| for (int i = 0; i < topN.getOrderKeys().size(); i++) { | ||
| // prefix check | ||
| if (!topnKeys.get(i).equals(agg.getGroupByExpressions().get(i))) { | ||
| return Lists.newArrayList(); | ||
| } | ||
| orderKeys.add(topN.getOrderKeys().get(i)); | ||
| } | ||
| for (int i = topN.getOrderKeys().size(); i < agg.getGroupByExpressions().size(); i++) { | ||
| orderKeys.add(new OrderKey(agg.getGroupByExpressions().get(i), true, false)); | ||
| } | ||
| return orderKeys; | ||
| } | ||
|
|
||
| @Override | ||
| public Plan visitPhysicalLimit(PhysicalLimit<? extends Plan> limit, CascadesContext ctx) { | ||
| limit.child().accept(this, ctx); | ||
| if (ConnectContext.get().getSessionVariable().topnOptLimitThreshold <= limit.getLimit() + limit.getOffset()) { | ||
| return limit; | ||
| } | ||
| Plan limitChild = limit.child(); | ||
| if (limitChild instanceof PhysicalProject) { | ||
| limitChild = limitChild.child(0); | ||
| } | ||
| if (limitChild instanceof PhysicalHashAggregate) { | ||
| PhysicalHashAggregate<? extends Plan> upperAgg = (PhysicalHashAggregate<? extends Plan>) limitChild; | ||
| if (upperAgg.getAggPhase().isGlobal() && upperAgg.getAggMode() == AggMode.BUFFER_TO_RESULT) { | ||
| Plan child = upperAgg.child(); | ||
| Plan grandChild = child.child(0); | ||
| if (child instanceof PhysicalDistribute | ||
| && ((PhysicalDistribute<?>) child).getDistributionSpec() instanceof DistributionSpecGather | ||
| && grandChild instanceof PhysicalHashAggregate) { | ||
| upperAgg.setTopnPushInfo(new TopnPushInfo( | ||
| generateOrderKeyByGroupKey(upperAgg), | ||
| limit.getLimit() + limit.getOffset())); | ||
| PhysicalHashAggregate<? extends Plan> bottomAgg = | ||
| (PhysicalHashAggregate<? extends Plan>) grandChild; | ||
| bottomAgg.setTopnPushInfo(new TopnPushInfo( | ||
| generateOrderKeyByGroupKey(bottomAgg), | ||
| limit.getLimit() + limit.getOffset())); | ||
| } | ||
| } else if (upperAgg.getAggMode() == AggMode.INPUT_TO_RESULT) { | ||
| // 1-phase agg | ||
| upperAgg.setTopnPushInfo(new TopnPushInfo( | ||
| generateOrderKeyByGroupKey(upperAgg), | ||
| limit.getLimit() + limit.getOffset())); | ||
| } | ||
| } | ||
| return limit; | ||
| } | ||
|
|
||
| private List<OrderKey> generateOrderKeyByGroupKey(PhysicalHashAggregate<? extends Plan> agg) { | ||
| return agg.getGroupByExpressions().stream() | ||
| .map(key -> new OrderKey(key, true, false)) | ||
| .collect(Collectors.toList()); | ||
| } | ||
| } |
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
119 changes: 119 additions & 0 deletions
119
fe/fe-core/src/main/java/org/apache/doris/nereids/rules/rewrite/LimitAggToTopNAgg.java
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,119 @@ | ||
| // 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.doris.nereids.rules.rewrite; | ||
|
|
||
| import org.apache.doris.nereids.properties.OrderKey; | ||
| import org.apache.doris.nereids.rules.Rule; | ||
| import org.apache.doris.nereids.rules.RuleType; | ||
| import org.apache.doris.nereids.trees.expressions.Expression; | ||
| 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; | ||
| import org.apache.doris.nereids.trees.plans.logical.LogicalTopN; | ||
| import org.apache.doris.qe.ConnectContext; | ||
|
|
||
| import com.google.common.collect.ImmutableList; | ||
| import com.google.common.collect.Lists; | ||
|
|
||
| import java.util.List; | ||
| import java.util.stream.Collectors; | ||
|
|
||
| /** | ||
| * convert limit->agg to topn->agg | ||
| * if all group keys are in limit.output | ||
| * to enable | ||
| * 1. topn-filter | ||
| * 2. push limit to local agg | ||
| */ | ||
| public class LimitAggToTopNAgg implements RewriteRuleFactory { | ||
| @Override | ||
| public List<Rule> buildRules() { | ||
| return ImmutableList.of( | ||
| // limit -> agg to topn->agg | ||
| logicalLimit(logicalAggregate()) | ||
| .when(limit -> ConnectContext.get() != null | ||
| && ConnectContext.get().getSessionVariable().pushTopnToAgg | ||
| && ConnectContext.get().getSessionVariable().topnOptLimitThreshold | ||
| >= limit.getLimit() + limit.getOffset()) | ||
| .then(limit -> { | ||
| LogicalAggregate<? extends Plan> agg = limit.child(); | ||
| List<OrderKey> orderKeys = generateOrderKeyByGroupKey(agg); | ||
| return new LogicalTopN<>(orderKeys, limit.getLimit(), limit.getOffset(), agg); | ||
| }).toRule(RuleType.LIMIT_AGG_TO_TOPN_AGG), | ||
| //limit->project->agg to topn->project->agg | ||
| logicalLimit(logicalProject(logicalAggregate())) | ||
| .when(limit -> ConnectContext.get() != null | ||
| && ConnectContext.get().getSessionVariable().pushTopnToAgg | ||
| && ConnectContext.get().getSessionVariable().topnOptLimitThreshold | ||
| >= limit.getLimit() + limit.getOffset()) | ||
| .when(limit -> outputAllGroupKeys(limit, limit.child().child())) | ||
| .then(limit -> { | ||
| LogicalProject<? extends Plan> project = limit.child(); | ||
| LogicalAggregate<? extends Plan> agg = (LogicalAggregate<? extends Plan>) project.child(); | ||
| List<OrderKey> orderKeys = generateOrderKeyByGroupKey(agg); | ||
| return new LogicalTopN<>(orderKeys, limit.getLimit(), limit.getOffset(), project); | ||
| }).toRule(RuleType.LIMIT_AGG_TO_TOPN_AGG), | ||
| // topn -> agg: add all group key to sort key, if sort key is prefix of group key | ||
| logicalTopN(logicalAggregate()) | ||
| .when(topn -> ConnectContext.get() != null | ||
| && ConnectContext.get().getSessionVariable().pushTopnToAgg | ||
| && ConnectContext.get().getSessionVariable().topnOptLimitThreshold | ||
| >= topn.getLimit() + topn.getOffset()) | ||
| .then(topn -> { | ||
| LogicalAggregate<? extends Plan> agg = (LogicalAggregate<? extends Plan>) topn.child(); | ||
| List<OrderKey> newOrders = tryGenerateOrderKeyByGroupKeyAndTopnKey(topn, agg); | ||
| if (newOrders.isEmpty()) { | ||
| return topn; | ||
| } else { | ||
| return topn.withOrderKeys(newOrders); | ||
| } | ||
| }).toRule(RuleType.LIMIT_AGG_TO_TOPN_AGG)); | ||
| } | ||
|
|
||
| private List<OrderKey> tryGenerateOrderKeyByGroupKeyAndTopnKey(LogicalTopN<? extends Plan> topN, | ||
| LogicalAggregate<? extends Plan> agg) { | ||
| List<OrderKey> orderKeys = Lists.newArrayListWithCapacity(agg.getGroupByExpressions().size()); | ||
| if (topN.getOrderKeys().size() > agg.getGroupByExpressions().size()) { | ||
| return orderKeys; | ||
| } | ||
| List<Expression> topnKeys = topN.getOrderKeys().stream() | ||
| .map(OrderKey::getExpr).collect(Collectors.toList()); | ||
| for (int i = 0; i < topN.getOrderKeys().size(); i++) { | ||
| // prefix check | ||
| if (!topnKeys.get(i).equals(agg.getGroupByExpressions().get(i))) { | ||
| return Lists.newArrayList(); | ||
| } | ||
| orderKeys.add(topN.getOrderKeys().get(i)); | ||
| } | ||
| for (int i = topN.getOrderKeys().size(); i < agg.getGroupByExpressions().size(); i++) { | ||
| orderKeys.add(new OrderKey(agg.getGroupByExpressions().get(i), true, false)); | ||
| } | ||
| return orderKeys; | ||
| } | ||
|
|
||
| private boolean outputAllGroupKeys(LogicalLimit limit, LogicalAggregate agg) { | ||
| return limit.getOutputSet().containsAll(agg.getGroupByExpressions()); | ||
| } | ||
|
|
||
| private List<OrderKey> generateOrderKeyByGroupKey(LogicalAggregate<? extends Plan> agg) { | ||
| return agg.getGroupByExpressions().stream() | ||
| .map(key -> new OrderKey(key, true, false)) | ||
| .collect(Collectors.toList()); | ||
| } | ||
| } | ||
Oops, something went wrong.
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
Uh oh!
There was an error while loading. Please reload this page.