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https://issues.apache.org/jira/browse/DRILL-6811?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16662185#comment-16662185
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ASF GitHub Bot commented on DRILL-6811:
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vvysotskyi opened a new pull request #1510: DRILL-6811: Fix type inference to
return correct data mode for boolean functions
URL: https://github.com/apache/drill/pull/1510
For details please see
[DRILL-6811](https://issues.apache.org/jira/browse/DRILL-6811)
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> Fix type inference to return correct data mode for boolean functions
> --------------------------------------------------------------------
>
> Key: DRILL-6811
> URL: https://issues.apache.org/jira/browse/DRILL-6811
> Project: Apache Drill
> Issue Type: Bug
> Affects Versions: 1.14.0
> Reporter: Volodymyr Vysotskyi
> Assignee: Volodymyr Vysotskyi
> Priority: Major
> Fix For: 1.15.0
>
>
> For some functions which return a boolean result and cannot return null
> values {{DrillDefaultSqlReturnTypeInference.inferReturnType()}} returns type
> with nullable data mode.
> Examples of the functions which cannot return nulls:
> * {{IS NULL}}
> * {{IS NOT NULL}}
> * {{NOT}}
> * {{IS TRUE}}
> and other.
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