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https://issues.apache.org/jira/browse/ARROW-7179?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17396652#comment-17396652
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David Li commented on ARROW-7179:
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Ah, I see, thanks Joris. It looks like coalesce has slightly more complete type
support; it's also variadic instead of binary. Maybe the path here then should
be to benchmark the common implementations and choose the faster one, then
consolidate both into one kernel. (And maybe provide aliases from one to the
other?)
> [C++][Compute] Array support for fill_null
> ------------------------------------------
>
> Key: ARROW-7179
> URL: https://issues.apache.org/jira/browse/ARROW-7179
> Project: Apache Arrow
> Issue Type: Improvement
> Components: C++
> Affects Versions: 0.15.1
> Reporter: Ben Kietzman
> Assignee: David Li
> Priority: Major
> Labels: analytics
> Fix For: 5.0.0
>
>
> Add kernels to support which replacing null values in an array with values
> taken from corresponding slots in another array:
> {code}
> fill_null([1, null, null, 3], [5, 6, null, 8]) -> [1, 6, null, 3]
> {code}
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