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https://issues.apache.org/jira/browse/ARROW-9489?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17229989#comment-17229989
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Maarten Breddels commented on ARROW-9489:
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Yes, I thought about that too. Although I think a `np.where` equivalent would
be more general. Sth like:
{code:java}
pc.where(pc.is_null(arr), arr2, arr) # equivalent what you described
pc.where(pc.is_null(arr), 'c', arr) # less performant version of fill_null
{code}
I could explore what you describe, and see if we can do some template
programming so that we can generalize this to other kernels as well. But I
think a 'where' kernel would make more sense at this point in time.
> [C++] Add fill_null kernel implementation for (array[string], scalar[string])
> -----------------------------------------------------------------------------
>
> Key: ARROW-9489
> URL: https://issues.apache.org/jira/browse/ARROW-9489
> Project: Apache Arrow
> Issue Type: Improvement
> Components: C++
> Reporter: Uwe Korn
> Assignee: Maarten Breddels
> Priority: Major
> Labels: pull-request-available
> Fix For: 3.0.0
>
> Time Spent: 1.5h
> Remaining Estimate: 0h
>
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