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https://issues.apache.org/jira/browse/KYLIN-4791?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17217371#comment-17217371
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ASF subversion and git services commented on KYLIN-4791:
--------------------------------------------------------
Commit d4cd28d108c8f16aa1546434a9f311002d2d8010 in kylin's branch
refs/heads/kylin-on-parquet-v2 from Zhichao Zhang
[ https://gitbox.apache.org/repos/asf?p=kylin.git;h=d4cd28d ]
KYLIN-4791 Fix exception 'UnsupportedOperationException: empty.reduceLeft' when
there are cast expressions in the filters of FilePruner
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.
> 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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