[jira] [Closed] (ARROW-11080) [C++][Dataset] Improvements to implicit casting

["Ben Kietzman (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/ARROW-11080?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Ben Kietzman closed ARROW-11080.
--------------------------------
    Resolution: Duplicate

> [C++][Dataset] Improvements to implicit casting
> -----------------------------------------------
>
>                 Key: ARROW-11080
>                 URL: https://issues.apache.org/jira/browse/ARROW-11080
>             Project: Apache Arrow
>          Issue Type: Improvement
>          Components: C++
>            Reporter: Neal Richardson
>            Assignee: Ben Kietzman
>            Priority: Major
>             Fix For: 3.0.0
>
>
> Followup to ARROW-10322. In ARROW-9187, where we started making use of more compute functions in R, we found a couple of places where implicit casts weren't being inserted where they should:
> * https://github.com/apache/arrow/pull/8947/commits/843ff2a39d8a4e1c92247fb672567c0b85b4f45a#diff-79100695986bbd6a63704fe9f238ce3ae9a39ddd093b7f6b213d4a722309d20aR576 "Function multiply_checked has no kernel matching input types (scalar[double], array[int32])"
> * https://github.com/apache/arrow/pull/8947/commits/843ff2a39d8a4e1c92247fb672567c0b85b4f45a#diff-79100695986bbd6a63704fe9f238ce3ae9a39ddd093b7f6b213d4a722309d20aR590  "Function add_checked has no kernel matching input types (array[double], array[int32])" because implicit casts are only applied to scalars to cast them to the type of the other argument
> This may speak to a need for more rules around how inputs should be casted/promoted in different contexts.



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