[jira] [Updated] (SPARK-21651) Detect MapType in Json InferSchema

["Hyukjin Kwon (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SPARK-21651?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Hyukjin Kwon updated SPARK-21651:
---------------------------------
    Labels: bulk-closed  (was: )

> Detect MapType in Json InferSchema
> ----------------------------------
>
>                 Key: SPARK-21651
>                 URL: https://issues.apache.org/jira/browse/SPARK-21651
>             Project: Spark
>          Issue Type: Improvement
>          Components: SQL
>    Affects Versions: 2.1.0, 2.1.1, 2.2.0
>            Reporter: Jochen Niebuhr
>            Priority: Minor
>              Labels: bulk-closed
>
> When loading Json Files which include a map with very variable keys, the current schema infer logic might create a very large schema. This will lead to long load times and possibly out of memory errors. 
> I've already submitted a pull request to the mongo spark driver which had the same problem. Should I port this logic over to the json schema infer class?
> The MongoDB Spark pull request mentioned is: https://github.com/mongodb/mongo-spark/pull/24



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