John Muehlhausen created ARROW-6836:
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Summary: [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
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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