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Posted to reviews@spark.apache.org by GitBox <gi...@apache.org> on 2019/10/03 14:53:35 UTC

[GitHub] [spark] hvanhovell opened a new pull request #26013: [SPARK-29347] This PR adds JSON serialization for Spark external Rows.

hvanhovell opened a new pull request #26013: [SPARK-29347] This PR adds JSON serialization for Spark external Rows.
URL: https://github.com/apache/spark/pull/26013
 
 
   ### What changes were proposed in this pull request?
   This PR adds JSON serialization for Spark external Rows.
   
   ### Why are the changes needed?
   This is to be used for observable metrics where the `StreamingQueryProgress` contains a map of observed metrics rows which needs to be serialized in some cases.
   
   ### Does this PR introduce any user-facing change?
   Yes, a user can call `toJson` on rows returned when collecting a DataFrame to the driver.
   
   ### How was this patch tested?
   Added a new test suite: `RowJsonSuite` that should test this.
   

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