[ARROW-13852] [R] Handle Dataset schema metadata in ExecPlan

• Type: New Feature
• Status: Resolved
• Priority: Blocker
• Resolution: Fixed
• Fix Version/s: 6.0.0
• Component/s: R
• Labels: pull-request-available query-engine
• External issue URL: https://github.com/apache/arrow/issues/29473
• Assignee: Neal Richardson
• Reporter: Neal Richardson
• Created: 01/Sep/21 19:09
• Updated: 11/Jan/23 08:35
• Resolved: 21/Sep/21 12:43

Description

See https://github.com/apache/arrow/pull/10992#issuecomment-910598194. Scanner would preserve the schema metadata but ExecPlan does not, and that makes sense in the general case. But this may result in unexpected behavior in R where we keep R attributes in the schema metadata.

We could probably determine in ExecPlan$Build which fields in the resulting Table are just carried forward from the underlying Dataset and pull in metadata for them to the result.

Issue Links

• links to: GitHub Pull Request #11183