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Posted to issues@kylin.apache.org by "Xiaoxiang Yu (Jira)" <ji...@apache.org> on 2020/11/13 02:30:00 UTC

[jira] [Resolved] (KYLIN-4791) Throws exception 'UnsupportedOperationException: empty.reduceLeft' when there are cast expressions in the filters of FilePruner

     [ https://issues.apache.org/jira/browse/KYLIN-4791?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Xiaoxiang Yu resolved KYLIN-4791.
---------------------------------
    Resolution: Fixed

> Throws exception 'UnsupportedOperationException: empty.reduceLeft' when there are cast expressions in the filters of FilePruner
> -------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: KYLIN-4791
>                 URL: https://issues.apache.org/jira/browse/KYLIN-4791
>             Project: Kylin
>          Issue Type: Bug
>          Components: Query Engine, Spark Engine
>    Affects Versions: v4.0.0-alpha
>            Reporter: Zhichao  Zhang
>            Assignee: Zhichao  Zhang
>            Priority: Minor
>             Fix For: v4.0.0-beta
>
>
> When execute function 'pruneSegments' of FilePruner, if there are some cast expressions in filter, it will throw exception 'UnsupportedOperationException: empty.reduceLeft'.
>  
> Solution:
> Convert cast expressions in filter to attribute before translating filter.



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