Michael Armbrust created SPARK-2179:
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             Summary: Public API for DataTypes and Schema
                 Key: SPARK-2179
                 URL: https://issues.apache.org/jira/browse/SPARK-2179
             Project: Spark
          Issue Type: Improvement
          Components: SQL
            Reporter: Michael Armbrust


We want something like the following:
 * Expose DataType in the SQL package and lock down all the internal details 
(TypeTags, etc)
 * Programatic API for viewing the schema of an RDD as a StructType
 * Method that creates a schema RDD given (RDD[A], StructType, A => Row)



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