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Posted to issues@spark.apache.org by "Yin Huai (JIRA)" <ji...@apache.org> on 2015/05/07 08:02:00 UTC
[jira] [Resolved] (SPARK-5443) jsonRDD with schema should ignore
sub-objects that are omitted in schema
[ https://issues.apache.org/jira/browse/SPARK-5443?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Yin Huai resolved SPARK-5443.
-----------------------------
Resolution: Fixed
Fix Version/s: 1.4.0
It has been resolved by https://github.com/apache/spark/commit/2d6612cc8b98f767d73c4d15e4065bf3d6c12ea7.
> jsonRDD with schema should ignore sub-objects that are omitted in schema
> ------------------------------------------------------------------------
>
> Key: SPARK-5443
> URL: https://issues.apache.org/jira/browse/SPARK-5443
> Project: Spark
> Issue Type: New Feature
> Components: SQL
> Affects Versions: 1.2.0
> Reporter: Derrick Burns
> Assignee: Nathan Howell
> Fix For: 1.4.0
>
> Original Estimate: 168h
> Remaining Estimate: 168h
>
> Reading the code for jsonRDD, it appears that all fields of a JSON object are read into a ROW independent of the provided schema. I would expect it to be more efficient to only store in the ROW those fields that are explicitly included in the schema.
> For example, assume that I only wish to extract the "id" field of a tweet. If I provided a schema that simply had one field within a map named "id", then the row object would only store that field within a map.
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