[jira] [Assigned] (ARROW-6836) [Format] add a custom_metadata:[KeyValue] field to the Footer table in File.fbs

["Micah Kornfield (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/ARROW-6836?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Micah Kornfield reassigned ARROW-6836:
--------------------------------------

    Assignee: John Muehlhausen

> [Format] add a custom_metadata:[KeyValue] field to the Footer table in File.fbs
> -------------------------------------------------------------------------------
>
>                 Key: ARROW-6836
>                 URL: https://issues.apache.org/jira/browse/ARROW-6836
>             Project: Apache Arrow
>          Issue Type: New Feature
>          Components: Format
>            Reporter: John Muehlhausen
>            Assignee: John Muehlhausen
>            Priority: Minor
>              Labels: pull-request-available
>             Fix For: 0.16.0
>
>          Time Spent: 1h 20m
>  Remaining Estimate: 0h
>
> add a custom_metadata:[KeyValue] field to the Footer table in File.fbs
> Use case:
> If a file is expanded with additional recordbatches and the custom_metadata changes, Schema is no longer an appropriate place to make this change since the two copies of Schema (at the beginning and end of the file) would then be ambiguous
> cf https://lists.apache.org/thread.html/c3b3d1456b7062a435f6795c0308ccb7c8fe55c818cfed2cf55f76c5@%3Cdev.arrow.apache.org%3E



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