database/doris
2
0
Fork 0
Code Issues Pull Requests Actions 3 Packages Projects Releases Wiki Activity

[feature](Nereids): eliminate sort under subquery (#26993)

Browse Source
This commit is contained in:
谢健
2023-11-16 10:30:28 +08:00
committed by GitHub
parent a54cfb7558
commit f3ee6dd55a
4 changed files with 61 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
fe/fe-core/src/main/java/org/apache/doris/nereids/jobs/executor/Rewriter.java
View File

@ -62,6 +62,7 @@ import org.apache.doris.nereids.rules.rewrite.EliminateNotNull;
import org.apache.doris.nereids.rules.rewrite.EliminateNullAwareLeftAntiJoin;
import org.apache.doris.nereids.rules.rewrite.EliminateOrderByConstant;
import org.apache.doris.nereids.rules.rewrite.EliminateSort;
import org.apache.doris.nereids.rules.rewrite.EliminateSortUnderSubquery;
import org.apache.doris.nereids.rules.rewrite.EliminateUnnecessaryProject;
import org.apache.doris.nereids.rules.rewrite.EnsureProjectOnTopJoin;
import org.apache.doris.nereids.rules.rewrite.ExtractAndNormalizeWindowExpression;
@ -125,6 +126,7 @@ public class Rewriter extends AbstractBatchJobExecutor {
topic("Plan Normalization",
topDown(
new EliminateOrderByConstant(),
new EliminateSortUnderSubquery(),
new EliminateGroupByConstant(),
// MergeProjects depends on this rule
new LogicalSubQueryAliasToLogicalProject(),

33
fe/fe-core/src/main/java/org/apache/doris/nereids/rules/rewrite/EliminateSortUnderSubquery.java Normal file
View File

@ -0,0 +1,33 @@
// 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.rules.Rule;
import org.apache.doris.nereids.rules.RuleType;
/**
* SELECT * FROM lineorder ORDER BY 'f' -> SELECT * FROM lineorder
*/
public class EliminateSortUnderSubquery extends OneRewriteRuleFactory {
@Override
public Rule build() {
return logicalSubQueryAlias(logicalSort())
.then(subq -> subq.withChildren(subq.child().child(0)))
.toRule(RuleType.ELIMINATE_ORDER_BY_CONSTANT);
}
}