forked from apache/calcite
-
Notifications
You must be signed in to change notification settings - Fork 0
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
[CALCITE-6011] Add FilterWindowTransposeRule to push a Filter past a …
…Window Close apache#3439
- Loading branch information
Showing
6 changed files
with
336 additions
and
1 deletion.
There are no files selected for viewing
This file contains 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 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
131 changes: 131 additions & 0 deletions
131
core/src/main/java/org/apache/calcite/rel/rules/FilterWindowTransposeRule.java
This file contains 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 +1,131 @@ | ||
| /* | ||
| * 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.calcite.rel.rules; | ||
|
|
||
| import org.apache.calcite.plan.RelOptRuleCall; | ||
| import org.apache.calcite.plan.RelOptUtil; | ||
| import org.apache.calcite.plan.RelRule; | ||
| import org.apache.calcite.rel.RelNode; | ||
| import org.apache.calcite.rel.core.Filter; | ||
| import org.apache.calcite.rel.core.Window; | ||
| import org.apache.calcite.rex.RexNode; | ||
| import org.apache.calcite.tools.RelBuilder; | ||
| import org.apache.calcite.util.ImmutableBitSet; | ||
|
|
||
| import com.google.common.collect.ImmutableList; | ||
|
|
||
| import org.immutables.value.Value; | ||
|
|
||
| import java.util.ArrayList; | ||
| import java.util.List; | ||
|
|
||
| /** | ||
| * Planner rule that pushes a {@link org.apache.calcite.rel.core.Filter} | ||
| * past a {@link org.apache.calcite.rel.core.Window}. | ||
| * | ||
| * <p> If {@code Filter} condition used columns belongs {@code Window} partition keys, | ||
| * then we could push the condition past the {@code Window}. | ||
| * | ||
| * <p> For example: | ||
| * <blockquote><pre>{@code | ||
| * LogicalProject(NAME=[$0], DEPTNO=[$1], EXPR$2=[$2]) | ||
| * LogicalFilter(condition=[>($1, 0)]) | ||
| * LogicalProject(NAME=[$1], DEPTNO=[$0], EXPR$2=[$2]) | ||
| * LogicalWindow(window#0=[window(partition {0} aggs [COUNT()])]) | ||
| * LogicalTableScan(table=[[CATALOG, SALES, DEPT]]) | ||
| * }</pre></blockquote> | ||
| * | ||
| * <p> will convert to: | ||
| * <blockquote><pre>{@code | ||
| * LogicalProject(NAME=[$1], DEPTNO=[$0], EXPR$2=[$2]) | ||
| * LogicalWindow(window#0=[window(partition {0} aggs [COUNT()])]) | ||
| * LogicalFilter(condition=[>($0, 0)]) | ||
| * LogicalTableScan(table=[[CATALOG, SALES, DEPT]]) | ||
| * }</pre></blockquote> | ||
| * | ||
| * @see CoreRules#FILTER_PROJECT_TRANSPOSE | ||
| * @see CoreRules#PROJECT_TO_LOGICAL_PROJECT_AND_WINDOW | ||
| * @see CoreRules#FILTER_WINDOW_TRANSPOSE | ||
| */ | ||
| @Value.Enclosing | ||
| public class FilterWindowTransposeRule | ||
| extends RelRule<FilterWindowTransposeRule.Config> | ||
| implements TransformationRule { | ||
|
|
||
| protected FilterWindowTransposeRule(final Config config) { | ||
| super(config); | ||
| } | ||
|
|
||
| @Override public void onMatch(final RelOptRuleCall call) { | ||
| final Filter filterRel = call.rel(0); | ||
| final Window windowRel = call.rel(1); | ||
|
|
||
| // Get the window all groups | ||
| List<Window.Group> windowGroups = windowRel.groups; | ||
|
|
||
| // The window may have multi groups,now we could only | ||
| // deal one group case,so that we could know the partition keys. | ||
| if (windowGroups.size() != 1) { | ||
| return; | ||
| } | ||
|
|
||
| final List<RexNode> conditions = | ||
| RelOptUtil.conjunctions(filterRel.getCondition()); | ||
| // The conditions which could be pushed to past window | ||
| final List<RexNode> pushedConditions = new ArrayList<>(); | ||
| final List<RexNode> remainingConditions = new ArrayList<>(); | ||
| final Window.Group group = windowGroups.get(0); | ||
| // Get the window partition keys | ||
| final ImmutableBitSet partitionKeys = group.keys; | ||
|
|
||
| for (RexNode condition : conditions) { | ||
| // Find the condition used columns | ||
| ImmutableBitSet rCols = RelOptUtil.InputFinder.bits(condition); | ||
| // If the window partition columns contains the condition used columns, | ||
| // then we could push the condition to past window. | ||
| if (partitionKeys.contains(rCols)) { | ||
| pushedConditions.add(condition); | ||
| } else { | ||
| remainingConditions.add(condition); | ||
| } | ||
| } | ||
|
|
||
| final RelBuilder builder = call.builder(); | ||
| // Use the pushed conditions to create a new filter above the window's input. | ||
| RelNode rel = builder.push(windowRel.getInput()).filter(pushedConditions).build(); | ||
| if (rel == windowRel.getInput(0)) { | ||
| return; | ||
| } | ||
| rel = windowRel.copy(windowRel.getTraitSet(), ImmutableList.of(rel)); | ||
| rel = builder.push(rel).filter(remainingConditions).build(); | ||
| call.transformTo(rel); | ||
| } | ||
|
|
||
| /** Rule configuration. */ | ||
| @Value.Immutable | ||
| public interface Config extends RelRule.Config { | ||
|
|
||
| Config DEFAULT = ImmutableFilterWindowTransposeRule.Config.of() | ||
| .withOperandSupplier(b0 -> | ||
| b0.operand(Filter.class).oneInput(b1 -> | ||
| b1.operand(Window.class).anyInputs())); | ||
|
|
||
| @Override default FilterWindowTransposeRule toRule() { | ||
| return new FilterWindowTransposeRule(this); | ||
| } | ||
| } | ||
| } |
This file contains 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 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 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