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https://issues.apache.org/jira/browse/SPARK-4842?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Michael Armbrust resolved SPARK-4842.
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Resolution: Won't Fix
This would break the API and we now support tuples pretty nicely which is a
convenient way to create DataFrames from inside a function.
> Use WeakTypeTags in ScalaReflection
> -----------------------------------
>
> Key: SPARK-4842
> URL: https://issues.apache.org/jira/browse/SPARK-4842
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 1.2.0
> Reporter: Michael Armbrust
> Priority: Critical
>
> Right now we can't create SchemaRDDs from RDDs of case classes that are
> defined inside of functions. This is because only WeakTypeTags are available
> in this scope. This is pretty confusing to users:
> http://apache-spark-user-list.1001560.n3.nabble.com/parquet-file-not-loading-spark-v-1-1-0-td20618.html#a20628
> https://issues.scala-lang.org/browse/SI-6649
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