[jira] [Assigned] (ARROW-11044) [C++] Add "replace" kernel

["Bruno LE HYARIC (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/ARROW-11044?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Bruno LE HYARIC reassigned ARROW-11044:
---------------------------------------

    Assignee: Bruno LE HYARIC

> [C++] Add "replace" kernel
> --------------------------
>
>                 Key: ARROW-11044
>                 URL: https://issues.apache.org/jira/browse/ARROW-11044
>             Project: Apache Arrow
>          Issue Type: New Feature
>          Components: C++
>            Reporter: Bruno LE HYARIC
>            Assignee: Bruno LE HYARIC
>            Priority: Major
>              Labels: pull-request-available
>          Time Spent: 2h 40m
>  Remaining Estimate: 0h
>
> Purpose a "replace" compute kernel which could fulfil -ARROW-10641 - [C++] A "replace" or "map" kernel to replace values in array based on mapping (@jorisvandenbossche)- [ARROW-9430](https://issues.apache.org/jira/browse/ARROW-9430) - [C++/Python] Kernel for SetItem(BooleanArray, values) (@xhochy). The implementation started on the basis of "fill_null" kernel. But it takes an additional BooleanArray parameter which is used as a mask to trigger value replacement.
> With following "null handling" logic:
> {noformat}
> Values		Mask		Replacement	Output
> 1 v		1 false		1 r		1 v
> 1 v		1 true		1 r		1 r
> 1 v		0 null		1 r		1 v
> 1 v		1 false		0 null		1 v
> 1 v		1 true		0 null		1 v
> 1 v		0 null		0 null		1 v
> 0 null		1 false		1 r		0 null
> 0 null		1 true		1 r		1 r
> 0 null		0 null		1 r		0 null
> 0 null		1 false		0 null		0 null
> 0 null		1 true		0 null		0 null
> 0 null		0 null		0 null		0 null
> {noformat}
> (each column indicates the validity bit and the corresponding value. "v" for current value, "r" for replacement value).



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