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feat(interactive): Support Optional Match and Where Not(subquery) in …
…Compiler (#3088) <!-- Thanks for your contribution! please review https://github.com/alibaba/GraphScope/blob/main/CONTRIBUTING.md before opening an issue. --> ## What do these changes do? 1. support optional match as left outer join 2. support where(not(subquery)) which is converted to anti join by `NotExistToAntiJoinRule` 3. support `FilterIntoJoinRule` to push down filters into join (using calcite standard implementation) <!-- Please give a short brief about these changes. --> ## Related issue number <!-- Are there any issues opened that will be resolved by merging this change? --> Fixes --------- Co-authored-by: Longbin Lai <[email protected]>
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157
.../src/main/java/com/alibaba/graphscope/common/ir/planner/rules/NotMatchToAntiJoinRule.java
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| /* | ||
| * Copyright 2020 Alibaba Group Holding Limited. | ||
| * | ||
| * Licensed 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 com.alibaba.graphscope.common.ir.planner.rules; | ||
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| import com.alibaba.graphscope.common.ir.tools.GraphBuilder; | ||
| import com.alibaba.graphscope.common.ir.tools.config.GraphOpt; | ||
| import com.google.common.collect.Lists; | ||
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| import org.apache.calcite.plan.*; | ||
| import org.apache.calcite.rel.RelNode; | ||
| import org.apache.calcite.rel.core.Filter; | ||
| import org.apache.calcite.rel.rules.TransformationRule; | ||
| import org.apache.calcite.rex.RexCall; | ||
| import org.apache.calcite.rex.RexNode; | ||
| import org.apache.calcite.rex.RexSubQuery; | ||
| import org.apache.calcite.sql.SqlKind; | ||
| import org.apache.calcite.tools.RelBuilderFactory; | ||
| import org.checkerframework.checker.nullness.qual.Nullable; | ||
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|
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| import java.util.List; | ||
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| public class NotMatchToAntiJoinRule<C extends NotMatchToAntiJoinRule.Config> extends RelRule<C> | ||
| implements TransformationRule { | ||
|
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| protected NotMatchToAntiJoinRule(C config) { | ||
| super(config); | ||
| } | ||
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| @Override | ||
| public void onMatch(RelOptRuleCall call) { | ||
| Filter filter = call.rel(0); | ||
| List<RexNode> conditions = RelOptUtil.conjunctions(filter.getCondition()); | ||
| List<RexNode> conditionsToRemove = Lists.newArrayList(); | ||
| RelNode input = filter.getInput(); | ||
| GraphBuilder graphBuilder = (GraphBuilder) call.builder(); | ||
| for (RexNode condition : conditions) { | ||
| if (foundNotExistSubQuery(condition)) { | ||
| input = convertToAntiJoin(input, condition, graphBuilder); | ||
| conditionsToRemove.add(condition); | ||
| } | ||
| } | ||
| conditions.removeAll(conditionsToRemove); | ||
| if (!conditionsToRemove.isEmpty() && !conditions.isEmpty()) { | ||
| filter = (Filter) graphBuilder.push(input).filter(conditions).build(); | ||
| } | ||
| RelNode newNode = (conditions.isEmpty()) ? input : filter; | ||
| call.transformTo(newNode); | ||
| } | ||
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| private RelNode convertToAntiJoin( | ||
| RelNode input, RexNode notExistCondition, GraphBuilder builder) { | ||
| RelNode leftChild = input; | ||
| RexSubQuery existSubQuery = (RexSubQuery) ((RexCall) notExistCondition).operands.get(0); | ||
| RelNode rightChild = builder.match(existSubQuery.rel, GraphOpt.Match.INNER).build(); | ||
| return builder.push(leftChild) | ||
| .push(rightChild) | ||
| .antiJoin(builder.getJoinCondition(leftChild, rightChild)) | ||
| .build(); | ||
| } | ||
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| public static class Config implements RelRule.Config { | ||
| public static NotMatchToAntiJoinRule.Config DEFAULT = | ||
| new NotMatchToAntiJoinRule.Config() | ||
| .withOperandSupplier( | ||
| b0 -> | ||
| b0.operand(Filter.class) | ||
| .predicate( | ||
| k -> { | ||
| List<RexNode> conditions = | ||
| RelOptUtil.conjunctions( | ||
| k.getCondition()); | ||
| for (RexNode condition : conditions) { | ||
| if (foundNotExistSubQuery( | ||
| condition)) { | ||
| return true; | ||
| } | ||
| } | ||
| return false; | ||
| }) | ||
| .anyInputs()) | ||
| .withDescription("NotExistToAntiJoinRule"); | ||
|
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| private RelRule.OperandTransform operandSupplier; | ||
| private @Nullable String description; | ||
| private RelBuilderFactory builderFactory; | ||
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| @Override | ||
| public RelRule toRule() { | ||
| return new NotMatchToAntiJoinRule(this); | ||
| } | ||
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| @Override | ||
| public NotMatchToAntiJoinRule.Config withRelBuilderFactory( | ||
| RelBuilderFactory relBuilderFactory) { | ||
| this.builderFactory = relBuilderFactory; | ||
| return this; | ||
| } | ||
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| @Override | ||
| public NotMatchToAntiJoinRule.Config withDescription( | ||
| @org.checkerframework.checker.nullness.qual.Nullable String s) { | ||
| this.description = s; | ||
| return this; | ||
| } | ||
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| @Override | ||
| public NotMatchToAntiJoinRule.Config withOperandSupplier( | ||
| RelRule.OperandTransform operandTransform) { | ||
| this.operandSupplier = operandTransform; | ||
| return this; | ||
| } | ||
|
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| @Override | ||
| public RelRule.OperandTransform operandSupplier() { | ||
| return this.operandSupplier; | ||
| } | ||
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| @Override | ||
| public @org.checkerframework.checker.nullness.qual.Nullable String description() { | ||
| return this.description; | ||
| } | ||
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| @Override | ||
| public RelBuilderFactory relBuilderFactory() { | ||
| return this.builderFactory; | ||
| } | ||
| } | ||
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| private static boolean foundNotExistSubQuery(RexNode condition) { | ||
| if (condition instanceof RexCall) { | ||
| RexCall call = (RexCall) condition; | ||
| if (call.getOperator().getKind() == SqlKind.NOT) { | ||
| RexNode operand = ((RexCall) condition).operands.get(0); | ||
| return operand instanceof RexSubQuery | ||
| && ((RexSubQuery) operand).getOperator().getKind() == SqlKind.EXISTS; | ||
| } else { | ||
| return false; | ||
| } | ||
| } else { | ||
| return false; | ||
| } | ||
| } | ||
| } |
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