[ARROW-9271] [R] Preserve data frame metadata in round trip

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 2.0.0
• Component/s: R
• Labels: pull-request-available
• External issue URL: https://github.com/apache/arrow/issues/25366
• Assignee: Romain Francois
• Reporter: Neal Richardson
• Created: 29/Jun/20 21:27
• Updated: 11/Jan/23 08:05
• Resolved: 11/Sep/20 22:49

Description

ARROW-8899 collects R attributes from the columns of a data.frame (including recursively in data frame columns), adds them to arrow schema metadata, and restores them when pulling a data frame into R. However, any attributes on the outer data frame itself are not preserved. These are lost in some autosplice magic code before AddMetadataFromDots can collect it.

Issue Links

• links to: GitHub Pull Request #8150