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Posted to issues@spark.apache.org by "Xiao Li (JIRA)" <ji...@apache.org> on 2016/10/07 22:54:20 UTC
[jira] [Commented] (SPARK-4782) Add inferSchema support for
RDD[Map[String, Any]]
[ https://issues.apache.org/jira/browse/SPARK-4782?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15556510#comment-15556510 ]
Xiao Li commented on SPARK-4782:
--------------------------------
This should have been already resolved in the 2.0 release. Thanks!
> 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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