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https://issues.apache.org/jira/browse/SPARK-4782?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14567237#comment-14567237
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Apache Spark commented on SPARK-4782:
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User 'lucarosellini' has created a pull request for this issue:
https://github.com/apache/spark/pull/6554
> Add inferSchema support for RDD[Map[String, Any]]
> -------------------------------------------------
>
> Key: SPARK-4782
> URL: https://issues.apache.org/jira/browse/SPARK-4782
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Reporter: Jianshi Huang
> Priority: Minor
>
> The best way to convert RDD[Map[String, Any]] to SchemaRDD currently seems to
> be converting each Map to JSON String first and use JsonRDD.inferSchema on it.
> It's very inefficient.
> Instead of JsonRDD, RDD[Map[String, Any]] is a better common denominator for
> Schemaless data as adding Map like interface to any serialization format is
> easy.
> So please add inferSchema support to RDD[Map[String, Any]]. *Then for any new
> serialization format we want to support, we just need to add a Map interface
> wrapper to it*
> Jianshi
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