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https://issues.apache.org/jira/browse/SPARK-14155?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15219935#comment-15219935
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koert kuipers commented on SPARK-14155:
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we are depending on these to use our own custom types in Dataset[Row]
(basically treat them as byte arrays from Dataset perspective).
also not sure what the point is of a user defined type if the user can not
define it. is it used somewhere else in spark?
> Hide UserDefinedType in Spark 2.0
> ---------------------------------
>
> Key: SPARK-14155
> URL: https://issues.apache.org/jira/browse/SPARK-14155
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Reporter: Reynold Xin
> Assignee: Reynold Xin
> Fix For: 2.0.0
>
>
> UserDefinedType is a developer API in Spark 1.x.
> With very high probability we will create a new API for user-defined type
> that also works well with column batches as well as encoders (datasets). In
> Spark 2.0, let's make UserDefinedType private[spark] first.
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