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https://issues.apache.org/jira/browse/DRILL-7156?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16906139#comment-16906139
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ASF GitHub Bot commented on DRILL-7156:
---------------------------------------

arina-ielchiieva commented on issue #1836: DRILL-7156: empty parquet files 
support
URL: https://github.com/apache/drill/pull/1836#issuecomment-520813625
 
 
   Good questions, you can investigate how now union types are handled. 
Regarding who wins, maybe you can look into 
`org.apache.drill.exec.physical.impl.union.UnionAllRecordBatch` to see how it 
Cretes combined schema using precedence rules.
 
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> Empty Parquet is not getting created if 0 records in result
> -----------------------------------------------------------
>
>                 Key: DRILL-7156
>                 URL: https://issues.apache.org/jira/browse/DRILL-7156
>             Project: Apache Drill
>          Issue Type: Bug
>          Components: Storage - Parquet
>    Affects Versions: 1.16.0
>            Reporter: Sayalee Bhanavase
>            Assignee: Oleg Zinoviev
>            Priority: Major
>             Fix For: 1.17.0
>
>
> I am creating parquet tables out of joins. If there is no record in join, it 
> does not create empty. table and when I reused the table my further script 
> fails. 
> Has anyone faced this issue? Any suggestion or workaround?



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