[jira] [Created] (ARROW-12345) Add abstract function for querying size and type

[Fiona La (Jira)]

Fiona La created ARROW-12345:
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             Summary: Add abstract function for querying size and type
                 Key: ARROW-12345
                 URL: https://issues.apache.org/jira/browse/ARROW-12345
             Project: Apache Arrow
          Issue Type: Sub-task
            Reporter: Fiona La






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