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https://issues.apache.org/jira/browse/SPARK-11196?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Hyukjin Kwon resolved SPARK-11196.
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Resolution: Incomplete
> Support for equality and pushdown of filters on some UDTs
> ---------------------------------------------------------
>
> Key: SPARK-11196
> URL: https://issues.apache.org/jira/browse/SPARK-11196
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Reporter: Michael Armbrust
> Priority: Major
> Labels: bulk-closed
>
> Today if you try and do any comparisons with UDTs it fails due to bad
> casting. However, in some cases the UDT is just a thing wrapper around a SQL
> type (StringType for example). In these cases we could just convert the UDT
> to its SQL type.
> Rough prototype:
> https://github.com/apache/spark/compare/apache:master...marmbrus:uuid-udt
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