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https://issues.apache.org/jira/browse/SPARK-3833?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sean Owen updated SPARK-3833:
-----------------------------
    Assignee: Michael Armbrust

> Allow Spark SQL SchemaRDDs to be merged
> ---------------------------------------
>
>                 Key: SPARK-3833
>                 URL: https://issues.apache.org/jira/browse/SPARK-3833
>             Project: Spark
>          Issue Type: Wish
>          Components: SQL
>            Reporter: Chris Wood
>            Assignee: Michael Armbrust
>             Fix For: 1.4.0
>
>
> We have JSON flowing into Spark SQL.
> I can successfully store them as parquet and read them with 
> sqlContext.jsonRDD, but the inferred schemas cannot be merged into a single 
> table to do queries.
> I'd like a way to allow for parquet file schemas to be merged, whether they 
> match or not, since we know the schema should be a union of the schemas from 
> the files.
> This will allow us to have the data define the schema and new columns will 
> just appear.



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