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https://issues.apache.org/jira/browse/KYLIN-2540?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15962951#comment-15962951
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Billy Liu commented on KYLIN-2540:
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Hi [~lidong_sjtu], I found you introduce a new UDF 'ConcatUDF'. Since these
kinds UDF(ConcatUDF, MassinUDF and VersionUDF) are not designed for user to
update, could we move these parameters from kylin.properties into source code.
Then the configuration file will be more clear.
> concat cascading is not supported
> ---------------------------------
>
> Key: KYLIN-2540
> URL: https://issues.apache.org/jira/browse/KYLIN-2540
> Project: Kylin
> Issue Type: Bug
> Components: Query Engine
> Reporter: Dong Li
> Assignee: Dong Li
>
> select concat('1', concat('1', '1')) - failed
> select concat('1', '1') - passed
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