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https://issues.apache.org/jira/browse/ARROW-17239?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Kouhei Sutou updated ARROW-17239:
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Fix Version/s: 11.0.0
(was: 10.0.0)
> [C++] Calculate output type from aggregate to convert arrow aggregate to
> substrait
> ----------------------------------------------------------------------------------
>
> Key: ARROW-17239
> URL: https://issues.apache.org/jira/browse/ARROW-17239
> Project: Apache Arrow
> Issue Type: Improvement
> Components: C++
> Reporter: Weston Pace
> Priority: Major
> Labels: substrait
> Fix For: 11.0.0
>
>
> I am adding support for mapping to/from Arrow aggregates and Substrait
> aggregates in ARROW-15582. However, the Arrow-Substrait direction is
> currently blocked because the Substrait plan needs to know the output type of
> an aggregate and there is no easy way to determine that from the Arrow
> information we have.
> We should be able to get this information from the function registry but the
> conversion routines do not have access to the function registry that I can
> tell. I'm not sure if the best solution is to pass the function registry
> into ToProto or to add the output type to the aggregate in Arrow.
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