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68 changes: 68 additions & 0 deletions
68
fe/fe-core/src/main/java/org/apache/doris/nereids/rules/rewrite/SimplifyEncodeDecode.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.expressions.Alias; | ||
| import org.apache.doris.nereids.trees.expressions.Expression; | ||
| import org.apache.doris.nereids.trees.expressions.NamedExpression; | ||
| import org.apache.doris.nereids.trees.expressions.functions.scalar.DecodeAsVarchar; | ||
| import org.apache.doris.nereids.trees.expressions.functions.scalar.EncodeStrToInteger; | ||
|
|
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| import com.google.common.collect.ImmutableList; | ||
| import com.google.common.collect.Lists; | ||
|
|
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| import java.util.List; | ||
|
|
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| /** | ||
| * project (..., encode(decode(A)) as B, ...) | ||
| * => | ||
| * project (..., A as B,...) | ||
| */ | ||
| public class SimplifyEncodeDecode implements RewriteRuleFactory { | ||
|
|
||
| @Override | ||
| public List<Rule> buildRules() { | ||
| return ImmutableList.of( | ||
| RuleType.SIMPLIFY_ENCODE_DECODE.build( | ||
| logicalProject() | ||
| .then(project -> { | ||
| List<NamedExpression> newProjections = | ||
| Lists.newArrayListWithCapacity(project.getProjects().size()); | ||
| boolean changed = false; | ||
| for (NamedExpression namedExpression : project.getProjects()) { | ||
| if (namedExpression instanceof Alias | ||
| && namedExpression.child(0) instanceof EncodeStrToInteger | ||
| && namedExpression.child(0).child(0) | ||
| instanceof DecodeAsVarchar) { | ||
| Alias alias = (Alias) namedExpression; | ||
| Expression body = namedExpression.child(0) | ||
| .child(0).child(0); | ||
| newProjections.add((Alias) alias.withChildren(body)); | ||
| changed = true; | ||
| } else { | ||
| newProjections.add(namedExpression); | ||
| } | ||
| } | ||
| return changed ? project.withProjects(newProjections) : project; | ||
| }) | ||
| ) | ||
| ); | ||
| } | ||
| } |
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26 changes: 13 additions & 13 deletions
26
regression-test/data/query_p0/limit/test_group_by_limit.out
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