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Posted to jira@arrow.apache.org by "Neal Richardson (Jira)" <ji...@apache.org> on 2021/09/01 19:10:00 UTC

[jira] [Created] (ARROW-13852) [R] Handle Dataset schema metadata in ExecPlan

Neal Richardson created ARROW-13852:
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             Summary: [R] Handle Dataset schema metadata in ExecPlan
                 Key: ARROW-13852
                 URL: https://issues.apache.org/jira/browse/ARROW-13852
             Project: Apache Arrow
          Issue Type: New Feature
          Components: R
            Reporter: Neal Richardson
             Fix For: 6.0.0


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.



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