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https://issues.apache.org/jira/browse/ARROW-4571?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Kenta Murata updated ARROW-4571:
--------------------------------
    External issue URL: https://github.com/apache/arrow/pull/3651

> [Format] Tensor.fbs file has multiple root_type declarations
> ------------------------------------------------------------
>
>                 Key: ARROW-4571
>                 URL: https://issues.apache.org/jira/browse/ARROW-4571
>             Project: Apache Arrow
>          Issue Type: Bug
>          Components: Format
>            Reporter: Eric Erhardt
>            Assignee: Kenta Murata
>            Priority: Major
>              Labels: pull-request-available
>          Time Spent: 10m
>  Remaining Estimate: 0h
>
> Looking at [the flatbuffers 
> doc|https://google.github.io/flatbuffers/flatbuffers_guide_tutorial.html], it 
> appears there should only be one `root_type` declaration in an fbs file:
> {code:java}
> The last part of the schema is the root_type. The root type declares what 
> will be the root table for the serialized data. In our case, the root type is 
> our Monster table.{code}
> However, the Tensor.fbs file has multiple `root_type` declarations:
> [https://github.com/apache/arrow/blob/69d595ae4c61902b3f2778e536fca6675350c88c/format/Tensor.fbs#L53]
> [https://github.com/apache/arrow/blob/69d595ae4c61902b3f2778e536fca6675350c88c/format/Tensor.fbs#L146]
>  
> See the discussion here: 
> https://github.com/apache/arrow/pull/2546#discussion_r256549256



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