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https://issues.apache.org/jira/browse/SPARK-27448?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Wenchen Fan reassigned SPARK-27448:
-----------------------------------

    Assignee: Gengliang Wang

> File source V2 table provider should be compatible with V1 provider
> -------------------------------------------------------------------
>
>                 Key: SPARK-27448
>                 URL: https://issues.apache.org/jira/browse/SPARK-27448
>             Project: Spark
>          Issue Type: Task
>          Components: SQL
>    Affects Versions: 3.0.0
>            Reporter: Gengliang Wang
>            Assignee: Gengliang Wang
>            Priority: Major
>
> In the rule `PreprocessTableCreation`, if an existing table is appended with 
> a different provider, the action will fail.
> Currently, there are two implementations for file sources and creating a 
> table with file source V2 will always fall back to V1 FileFormat. We should 
> consider the following cases as valid:
> 1. Appending a table with file source V2 provider using the v1 file format
> 2. Appending a table with v1 file format provider using file source V2 format 
>  



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