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https://issues.apache.org/jira/browse/SPARK-3851?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14182980#comment-14182980
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Gary Malouf commented on SPARK-3851:
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This is the type of issue that can bite users long after they have chosen to
use the framework - I think it's often just assumed to be there. How was this
handled in Hive world without Spark?
> 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: Bug
> Components: SQL
> Reporter: Michael Armbrust
>
> 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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