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https://issues.apache.org/jira/browse/KYLIN-5864?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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liyang closed KYLIN-5864.
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> Fix function of `ifnull` and `substring`
> ----------------------------------------
>
> Key: KYLIN-5864
> URL: https://issues.apache.org/jira/browse/KYLIN-5864
> Project: Kylin
> Issue Type: Bug
> Components: Query Engine
> Affects Versions: 5.0-alpha
> Reporter: pengfei.zhan
> Assignee: pengfei.zhan
> Priority: Major
> Fix For: 5.0.0
>
>
> Some of the following sql statements will be executed incorrectly in the
> current release.
> {code:sql}
> select ifnull(null, 'aaa');
> select substring(null, 1, 2);
> {code}
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