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https://issues.apache.org/jira/browse/SPARK-28280?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16881970#comment-16881970
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Stavros Kontopoulos edited comment on SPARK-28280 at 7/10/19 3:31 PM:
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[~hyukjin.kwon] udf returns None where there is NULL (returns string in
general) and affects calculations like count(), I guess this is legitimate
about this umbrella jira. Still it breaks the tests.
was (Author: skonto):
[~hyukjin.kwon] udf returns None where there is NULL (returns string in
general) and affects calculations like count(), I guess this is legitimate
about this umbrella jira.
> Convert and port 'group-by.sql' into UDF test base
> --------------------------------------------------
>
> Key: SPARK-28280
> URL: https://issues.apache.org/jira/browse/SPARK-28280
> Project: Spark
> Issue Type: Sub-task
> Components: PySpark, SQL, Tests
> Affects Versions: 3.0.0
> Reporter: Hyukjin Kwon
> Priority: Major
>
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