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[draft](mtmv) support rewrite when mv has date_trunc but query doesn'…
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...core/src/main/java/org/apache/doris/nereids/rules/expression/rules/SimplifyDateTrunc.java
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| @@ -0,0 +1,80 @@ | ||
| // 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.expression.rules; | ||
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| import org.apache.doris.nereids.rules.expression.AbstractExpressionRewriteRule; | ||
| import org.apache.doris.nereids.rules.expression.ExpressionMatchingContext; | ||
| import org.apache.doris.nereids.rules.expression.ExpressionPatternMatcher; | ||
| import org.apache.doris.nereids.rules.expression.ExpressionPatternRuleFactory; | ||
| import org.apache.doris.nereids.rules.expression.ExpressionRewriteContext; | ||
| import org.apache.doris.nereids.trees.expressions.ComparisonPredicate; | ||
| import org.apache.doris.nereids.trees.expressions.Expression; | ||
| import org.apache.doris.nereids.trees.expressions.Slot; | ||
| import org.apache.doris.nereids.trees.expressions.functions.scalar.DateTrunc; | ||
| import org.apache.doris.nereids.trees.expressions.literal.Literal; | ||
| import org.apache.doris.nereids.util.ExpressionUtils; | ||
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| import com.google.common.collect.ImmutableList; | ||
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| import java.util.HashMap; | ||
| import java.util.List; | ||
| import java.util.Map; | ||
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| /** | ||
| * date_trunc(slot#0, 'day') > '2024-01-01' can be simplify to slot#0 > '2024-01-01' | ||
| * */ | ||
| public class SimplifyDateTrunc extends AbstractExpressionRewriteRule implements ExpressionPatternRuleFactory { | ||
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| public static SimplifyDateTrunc INSTANCE = new SimplifyDateTrunc(); | ||
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| @Override | ||
| public List<ExpressionPatternMatcher<? extends Expression>> buildRules() { | ||
| return ImmutableList.of( | ||
| matchesType(ComparisonPredicate.class) | ||
| .when(predicate -> | ||
| (predicate.getArgument(0) instanceof DateTrunc | ||
| && predicate.getArgument(1) instanceof Literal) | ||
| || (predicate.getArgument(1) instanceof DateTrunc | ||
| && predicate.getArgument(0) instanceof Literal) | ||
| ) | ||
| .thenApply(SimplifyDateTrunc::rewriteWhenComparison) | ||
| ); | ||
| } | ||
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| private static Expression rewriteWhenComparison(ExpressionMatchingContext<? extends Expression> context) { | ||
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| Expression predicate = context.expr; | ||
| DateTrunc dateTrunc = predicate.getArgument(0) instanceof DateTrunc | ||
| ? (DateTrunc) predicate.getArgument(0) : (DateTrunc) predicate.getArgument(1); | ||
| Literal literal = predicate.getArgument(0) instanceof Literal | ||
| ? (Literal) predicate.getArgument(0) : (Literal) predicate.getArgument(1); | ||
| Expression argument = dateTrunc.getArgument(0); | ||
| if (!(argument instanceof Slot)) { | ||
| return predicate; | ||
| } | ||
| Map<Expression, Expression> exprMapping = new HashMap<>(); | ||
| exprMapping.put(argument, literal); | ||
| Expression replacedExpr = ExpressionUtils.replace(argument, exprMapping); | ||
| Expression evaluatedExpr = FoldConstantRuleOnFE.evaluate(replacedExpr, | ||
| new ExpressionRewriteContext(context.cascadesContext)); | ||
| if (evaluatedExpr.equals(literal)) { | ||
| return predicate.withChildren(ImmutableList.of(argument, literal)); | ||
| } | ||
| return predicate; | ||
| } | ||
| } |
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