[
https://issues.apache.org/jira/browse/ARROW-7179?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17116227#comment-17116227
]
Wes McKinney commented on ARROW-7179:
-------------------------------------
We can implement this either as a Binary or VarArgs scalar kernel
> [C++][Compute] Coalesce kernel
> ------------------------------
>
> 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: Ben Kietzman
> Priority: Major
> Fix For: 1.0.0
>
>
> Add a kernel which replaces null values in an array with a scalar value or
> with values taken from another array:
> {code}
> coalesce([1, 2, null, 3], 5) -> [1, 2, 5, 3]
> coalesce([1, null, null, 3], [5, 6, null, 8]) -> [1, 6, null, 3]
> {code}
> The code in {{take_internal.h}} should be of some use with a bit of
> refactoring.
> A filter Expression should be added at the same time.
--
This message was sent by Atlassian Jira
(v8.3.4#803005)
