Wes McKinney created ARROW-1587: ----------------------------------- Summary: [Format] Add metadata for user-defined logical types Key: ARROW-1587 URL: https://issues.apache.org/jira/browse/ARROW-1587 Project: Apache Arrow Issue Type: Improvement Components: Format Reporter: Wes McKinney Fix For: 0.8.0
While we have the custom_metadata field at the Field level, it may be useful to have a proper user-defined type metadata in the `Type` union, which would allow us to provide a physical representation type (e.g. "Latitude longitude is represented by a struct, whose children consist of two doubles") from the other non-user defined types. This is more flexible than {{custom_metadata}} because we can leverage existing structure in the Flatbuffers for describing the user type https://github.com/apache/arrow/blob/master/format/Schema.fbs#L285 -- This message was sent by Atlassian JIRA (v6.4.14#64029)