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https://issues.apache.org/jira/browse/IOTDB-2912?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Steve Yurong Su reopened IOTDB-2912:
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> Upgrade where clause to support more powerful expressions
> ---------------------------------------------------------
>
>                 Key: IOTDB-2912
>                 URL: https://issues.apache.org/jira/browse/IOTDB-2912
>             Project: Apache IoTDB
>          Issue Type: New Feature
>            Reporter: Xi Zhang
>            Assignee: Xi Zhang
>            Priority: Major
>
> Current where clause in select just support simple compare expression and 
> simple logic expression. We can upgrade the filter system to support complex 
> expression with UDF supported. (Current filter system can just compare 
> variables with constants.)



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