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 - [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:

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

(each column indicates the validity bit and the corresponding value. "v" for current value, "r" for replacement value).

Reporter: Bruno LE HYARIC / @bu2

Related issues:

• [C++/Python] Kernel for SetItem(IntegerArray, values) (relates to)
• [C++] A "replace" or "map" kernel to replace values in array based on mapping (relates to)
• [C++/Python] Kernel for SetItem(BooleanArray, values) (relates to)
• [C++] An "if_else" kernel to combine two arrays based on a mask (relates to)
• [C++] An "if_else" kernel to combine two arrays based on a mask (is superceded by)

PRs and other links:

• GitHub Pull Request #9024

_{Note: This issue was originally created as ARROW-11044. Please see the migration documentation for further details.}