[jira] [Created] (ARROW-4571) [Format] Tensor.fbs file has multiple root_type declarations

["Eric Erhardt (JIRA)" <ji...@apache.org>]

Eric Erhardt created ARROW-4571:
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             Summary: [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


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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