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Posted to issues@arrow.apache.org by "Weston Pace (Jira)" <ji...@apache.org> on 2022/02/05 00:56:00 UTC

[jira] [Created] (ARROW-15581) [C++] Add proper support for Substrait intervals

Weston Pace created ARROW-15581:
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             Summary: [C++] Add proper support for Substrait intervals
                 Key: ARROW-15581
                 URL: https://issues.apache.org/jira/browse/ARROW-15581
             Project: Apache Arrow
          Issue Type: Improvement
          Components: C++
            Reporter: Weston Pace


The Arrow Substrait consumer does not currently support functions on intervals.  This is because the Substrait deserializer currently asserts that all information must be round trippable and it errs on the side of rejecting plans before allowing a plan that could be correct consumed but not round tripped.

This affects interval types because, for example, the substrait interval 1 year 12 months would be converted to the substrait interval 2 years after a round trip.

To resolve this the current implementation encodes intervals as fixed length lists of numbers which we cannot do any kind of datetime math on.



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