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https://issues.apache.org/jira/browse/ROCKETMQ-121?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15927580#comment-15927580
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Rich Zhang commented on ROCKETMQ-121:
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Cool.
Eric, could you initiate a discussion in dev mail list? As far as I know,
ActiveMQ also use JavaCC to implement this functionality.
> 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: Rich Zhang
> 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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