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ASF GitHub Bot commented on ROCKETMQ-121: ----------------------------------------- Github user vongosling commented on a diff in the pull request: https://github.com/apache/incubator-rocketmq/pull/82#discussion_r108886049 --- Diff: filter/src/main/java/org/apache/rocketmq/filter/expression/BinaryExpression.java --- @@ -0,0 +1,91 @@ +/* + * 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.rocketmq.filter.expression; + +/** + * An expression which performs an operation on two expression values. + * <p> + * This class was taken from ActiveMQ org.apache.activemq.filter.BinaryExpression, --- End diff -- Cool~ > Support message filtering based on SQL92 > ---------------------------------------- > > Key: ROCKETMQ-121 > URL: https://issues.apache.org/jira/browse/ROCKETMQ-121 > Project: Apache RocketMQ > Issue Type: Wish > Components: rocketmq-client, rocketmq-store > Reporter: yukon > Assignee: vongosling > Priority: Minor > > So far, RocketMQ only support message filtering feature by `TAG`, but one > message only can own one tag, this is too limited to meet complex business > requirements. > So, we want to define and implement a reasonable filter language based on a > subset of the SQL 92 expression syntax to support customized message > filtering. -- This message was sent by Atlassian JIRA (v6.3.15#6346)