924060929 commented on code in PR #10630: URL: https://github.com/apache/doris/pull/10630#discussion_r914489422
########## fe/fe-core/src/main/java/org/apache/doris/nereids/rules/expression/rewrite/rules/BetweenToCompoundRule.java: ########## @@ -0,0 +1,61 @@ +// 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.doris.nereids.rules.expression.rewrite.rules; + +import org.apache.doris.nereids.rules.expression.rewrite.AbstractExpressionRewriteRule; +import org.apache.doris.nereids.rules.expression.rewrite.ExpressionRewriteContext; +import org.apache.doris.nereids.trees.NodeType; +import org.apache.doris.nereids.trees.expressions.Between; +import org.apache.doris.nereids.trees.expressions.CompoundPredicate; +import org.apache.doris.nereids.trees.expressions.Expression; +import org.apache.doris.nereids.trees.expressions.GreaterThan; +import org.apache.doris.nereids.trees.expressions.GreaterThanEqual; +import org.apache.doris.nereids.trees.expressions.LessThan; +import org.apache.doris.nereids.trees.expressions.LessThanEqual; +import org.apache.doris.nereids.trees.expressions.Not; + +/** + * Rewrites BetweenPredicates into an equivalent conjunctive/disjunctive + * CompoundPredicate. + * Examples: + * A BETWEEN X AND Y ==> A >= X AND A <= Y + * A NOT BETWEEN X AND Y ==> A < X OR A > Y + */ +public class BetweenToCompoundRule extends AbstractExpressionRewriteRule { + + public static BetweenToCompoundRule INSTANCE = new BetweenToCompoundRule(); + + @Override + public Expression visitNot(Not expr, ExpressionRewriteContext context) { Review Comment: In the case `Not(a between b and c)`, we can 1. rewrite `a between b and c` to ` a >= b and a <= c` in `BetweenToCompoundRue` 2. then apply `SimplifyNotExprRule` to rewrite `Not(a >= b and a <= c)` to `Not(a >= b) Or Not(a <= c)` by the De Morgan's laws 3. finally `SimplifyNotExprRule` recursive rewrite `Not(a >= b)` to `a < b`, and `Not(a <= c)` to `a > c` the result is `(a < b) Or (a > c)`. This steps make the functions independent of each other. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: commits-unsubscr...@doris.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: commits-unsubscr...@doris.apache.org For additional commands, e-mail: commits-h...@doris.apache.org
