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https://issues.apache.org/jira/browse/ARROW-9656?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Andrew Lamb reassigned ARROW-9656:
----------------------------------

    Assignee: Andrew Lamb

> [Rust][DataFusion] Slightly confusing error message when unsupported type is 
> provided to CREATE EXTERNAL TABLE
> --------------------------------------------------------------------------------------------------------------
>
>                 Key: ARROW-9656
>                 URL: https://issues.apache.org/jira/browse/ARROW-9656
>             Project: Apache Arrow
>          Issue Type: Improvement
>            Reporter: Andrew Lamb
>            Assignee: Andrew Lamb
>            Priority: Major
>
> When I make a typo in the CREATE EXTERNAL TABLE command, I get an error 
> message that doesn't doesn't tell me the valid values of STORED AS:
> As a user, I would like the software to guide me to the correct resolution 
> and tell me what the supported formats are.
> For example:
> {code}
> CREATE EXTERNAL TABLE repro
> STORED AS ARROW
> LOCATION 'repro.arrow';
> {code}
> results in:
> {code}
> > CREATE EXTERNAL TABLE repro
> STORED AS ARROW
> LOCATION 'repro.arrow';
> ParserError(ParserError("Expected fileformat, found: ARROW"))
> {code}
> Ideally the error should say that the valid choices are PARQUET, CSV, or 
> DSJSON



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