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https://issues.apache.org/jira/browse/ARROW-12951?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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David Li reassigned ARROW-12951:
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    Assignee: David Li

> [C++] Refactor StringTransform
> ------------------------------
>
>                 Key: ARROW-12951
>                 URL: https://issues.apache.org/jira/browse/ARROW-12951
>             Project: Apache Arrow
>          Issue Type: Task
>          Components: C++
>            Reporter: Antoine Pitrou
>            Assignee: David Li
>            Priority: Minor
>
> In {{compute/kernels/scalar_string.cc}, currently there is a non-trivial 
> inheritance relationship between {{StringTransform}} and its derived 
> implementation classes. Also, the derived classes have to be templated on the 
> actual string type even though their code doesn't care, making generated code 
> size probably bigger than it should be.
> Instead, there could be a {{StringTransformExec}} class that delegates to an 
> independent class for per-kernel specifics (mostly: the {{MaxCodeunits}} and 
> {{Transform}} methods).



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