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https://issues.apache.org/jira/browse/SPARK-23798?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16460329#comment-16460329
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Takeshi Yamamuro commented on SPARK-23798:
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That pr was to make the behaviour along with the hive one.
WDYT [~smilegator] ?
> The CreateArray and ConcatArray should return the default array type when no
> children provided
> ----------------------------------------------------------------------------------------------
>
> Key: SPARK-23798
> URL: https://issues.apache.org/jira/browse/SPARK-23798
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 2.4.0
> Reporter: Marek Novotny
> Priority: Minor
>
> The expressions should return ArrayType.defaultConcreteType.
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