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https://issues.apache.org/jira/browse/SPARK-3851?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Michael Armbrust updated SPARK-3851:
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    Assignee: Cheng Lian

> Support for reading parquet files with different but compatible schema
> ----------------------------------------------------------------------
>
>                 Key: SPARK-3851
>                 URL: https://issues.apache.org/jira/browse/SPARK-3851
>             Project: Spark
>          Issue Type: Improvement
>          Components: SQL
>            Reporter: Michael Armbrust
>            Assignee: Cheng Lian
>            Priority: Critical
>
> Right now it is required that all of the parquet files have the same schema.  
> It would be nice to support some safe subset of cases where the schemas of 
> files is different.  For example:
>  - Adding and removing nullable columns.
>  - Widening types (a column that is of both Int and Long type)



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