[jira] [Commented] (DRILL-6811) Fix type inference to return correct data mode for boolean functions

["ASF GitHub Bot (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/DRILL-6811?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16662185#comment-16662185 ] 

ASF GitHub Bot commented on DRILL-6811:
---------------------------------------

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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