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https://issues.apache.org/jira/browse/ROCKETMQ-121?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15948847#comment-15948847
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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_r108885505
  
    --- Diff: conf/logback_broker.xml ---
    @@ -222,6 +222,29 @@
             <appender-ref ref="RocketmqRebalanceLockAppender_inner"/>
         </appender>
     
    +    <appender name="RocketmqFilterAppender_inner"
    +              class="ch.qos.logback.core.rolling.RollingFileAppender">
    +        <file>${user.home}/logs/rocketmqlogs/filter.log</file>
    +        <append>true</append>
    +        <rollingPolicy 
class="ch.qos.logback.core.rolling.FixedWindowRollingPolicy">
    +            
<fileNamePattern>${user.home}/logs/rocketmqlogs/otherdays/filter.%i.log
    --- End diff --
    
    otherdays?


> 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.



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