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Project operator pushdown (opendistro-for-elasticsearch#933)
* init * update * update * update doc
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73 changes: 73 additions & 0 deletions
73
...istroforelasticsearch/sql/elasticsearch/planner/logical/rule/PushProjectAndIndexScan.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,73 @@ | ||
| /* | ||
| * | ||
| * Copyright 2020 Amazon.com, Inc. or its affiliates. All Rights Reserved. | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"). | ||
| * You may not use this file except in compliance with the License. | ||
| * A copy of the License is located at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * or in the "license" file accompanying this file. This file 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 com.amazon.opendistroforelasticsearch.sql.elasticsearch.planner.logical.rule; | ||
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| import static com.amazon.opendistroforelasticsearch.sql.elasticsearch.planner.logical.rule.OptimizationRuleUtils.findReferenceExpressions; | ||
| import static com.amazon.opendistroforelasticsearch.sql.planner.optimizer.pattern.Patterns.source; | ||
| import static com.facebook.presto.matching.Pattern.typeOf; | ||
|
|
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| import com.amazon.opendistroforelasticsearch.sql.elasticsearch.planner.logical.ElasticsearchLogicalIndexScan; | ||
| import com.amazon.opendistroforelasticsearch.sql.expression.ReferenceExpression; | ||
| import com.amazon.opendistroforelasticsearch.sql.planner.logical.LogicalPlan; | ||
| import com.amazon.opendistroforelasticsearch.sql.planner.logical.LogicalProject; | ||
| import com.amazon.opendistroforelasticsearch.sql.planner.optimizer.Rule; | ||
| import com.facebook.presto.matching.Capture; | ||
| import com.facebook.presto.matching.Captures; | ||
| import com.facebook.presto.matching.Pattern; | ||
| import java.util.Set; | ||
|
|
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| /** | ||
| * Push Project list into ElasticsearchLogicalIndexScan. | ||
| */ | ||
| public class PushProjectAndIndexScan implements Rule<LogicalProject> { | ||
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| private final Capture<ElasticsearchLogicalIndexScan> indexScanCapture; | ||
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| private final Pattern<LogicalProject> pattern; | ||
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| private Set<ReferenceExpression> pushDownProjects; | ||
|
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| /** | ||
| * Constructor of MergeProjectAndIndexScan. | ||
| */ | ||
| public PushProjectAndIndexScan() { | ||
| this.indexScanCapture = Capture.newCapture(); | ||
| this.pattern = typeOf(LogicalProject.class).matching( | ||
| project -> { | ||
| pushDownProjects = findReferenceExpressions(project.getProjectList()); | ||
| return !pushDownProjects.isEmpty(); | ||
| }).with(source() | ||
| .matching(typeOf(ElasticsearchLogicalIndexScan.class) | ||
| .matching(indexScan -> !indexScan.hasProjects()) | ||
| .capturedAs(indexScanCapture))); | ||
|
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| } | ||
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| @Override | ||
| public Pattern<LogicalProject> pattern() { | ||
| return pattern; | ||
| } | ||
|
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| @Override | ||
| public LogicalPlan apply(LogicalProject project, | ||
| Captures captures) { | ||
| ElasticsearchLogicalIndexScan indexScan = captures.get(indexScanCapture); | ||
| indexScan.setProjectList(pushDownProjects); | ||
| return new LogicalProject(indexScan, project.getProjectList()); | ||
| } | ||
| } |
77 changes: 77 additions & 0 deletions
77
...distroforelasticsearch/sql/elasticsearch/planner/logical/rule/PushProjectAndRelation.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,77 @@ | ||
| /* | ||
| * | ||
| * Copyright 2020 Amazon.com, Inc. or its affiliates. All Rights Reserved. | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"). | ||
| * You may not use this file except in compliance with the License. | ||
| * A copy of the License is located at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * or in the "license" file accompanying this file. This file 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 com.amazon.opendistroforelasticsearch.sql.elasticsearch.planner.logical.rule; | ||
|
|
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| import static com.amazon.opendistroforelasticsearch.sql.elasticsearch.planner.logical.rule.OptimizationRuleUtils.findReferenceExpressions; | ||
| import static com.amazon.opendistroforelasticsearch.sql.planner.optimizer.pattern.Patterns.source; | ||
| import static com.facebook.presto.matching.Pattern.typeOf; | ||
|
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| import com.amazon.opendistroforelasticsearch.sql.elasticsearch.planner.logical.ElasticsearchLogicalIndexScan; | ||
| import com.amazon.opendistroforelasticsearch.sql.expression.ReferenceExpression; | ||
| import com.amazon.opendistroforelasticsearch.sql.planner.logical.LogicalPlan; | ||
| import com.amazon.opendistroforelasticsearch.sql.planner.logical.LogicalProject; | ||
| import com.amazon.opendistroforelasticsearch.sql.planner.logical.LogicalRelation; | ||
| import com.amazon.opendistroforelasticsearch.sql.planner.optimizer.Rule; | ||
| import com.facebook.presto.matching.Capture; | ||
| import com.facebook.presto.matching.Captures; | ||
| import com.facebook.presto.matching.Pattern; | ||
| import java.util.Set; | ||
|
|
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| /** | ||
| * Push Project list into Relation. The transformed plan is Project - IndexScan | ||
| */ | ||
| public class PushProjectAndRelation implements Rule<LogicalProject> { | ||
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| private final Capture<LogicalRelation> relationCapture; | ||
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| private final Pattern<LogicalProject> pattern; | ||
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| private Set<ReferenceExpression> pushDownProjects; | ||
|
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| /** | ||
| * Constructor of MergeProjectAndRelation. | ||
| */ | ||
| public PushProjectAndRelation() { | ||
| this.relationCapture = Capture.newCapture(); | ||
| this.pattern = typeOf(LogicalProject.class) | ||
| .matching(project -> { | ||
| pushDownProjects = findReferenceExpressions(project.getProjectList()); | ||
| return !pushDownProjects.isEmpty(); | ||
| }) | ||
| .with(source().matching(typeOf(LogicalRelation.class).capturedAs(relationCapture))); | ||
| } | ||
|
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| @Override | ||
| public Pattern<LogicalProject> pattern() { | ||
| return pattern; | ||
| } | ||
|
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| @Override | ||
| public LogicalPlan apply(LogicalProject project, | ||
| Captures captures) { | ||
| LogicalRelation relation = captures.get(relationCapture); | ||
| return new LogicalProject( | ||
| ElasticsearchLogicalIndexScan | ||
| .builder() | ||
| .relationName(relation.getRelationName()) | ||
| .projectList(findReferenceExpressions(project.getProjectList())) | ||
| .build(), | ||
| project.getProjectList() | ||
| ); | ||
| } | ||
| } |
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