[jira] [Updated] (ARROW-14795) [C++] Replace With Mask not correctly replacing nulls

["Joris Van den Bossche (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/ARROW-14795?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Joris Van den Bossche updated ARROW-14795:
------------------------------------------
    Summary: [C++] Replace With Mask not correctly replacing nulls  (was: [C++] Replace With Mask, wrong result)

> [C++] Replace With Mask not correctly replacing nulls
> -----------------------------------------------------
>
>                 Key: ARROW-14795
>                 URL: https://issues.apache.org/jira/browse/ARROW-14795
>             Project: Apache Arrow
>          Issue Type: Bug
>          Components: C++
>            Reporter: Alvin Chunga Mamani
>            Assignee: Alvin Chunga Mamani
>            Priority: Major
>              Labels: kernel
>             Fix For: 7.0.0
>
>         Attachments: image-2021-11-22-15-51-30-120.png
>
>
> I'm working in ARROW-1699 and using the method *{{ReplaceWithArrayMask}}* for replace the nulls using a generated mask, but the method gave me unexpected results when the input Array contains nulls and this nulls are replaced with values.
> When testing this special Test on *vector_test_replace_test.cc*
> {code:java}
> this->Assert(ReplaceWithMask, this->array("[1, null, 1]"),
>    this->mask("[false, true, false]"),
>    this->array("[7]"),
>    this->array("[1, 7, 1]"));{code}
> The result is:
> {code:java}
> Actual:
> [
> 1,
> null,
> 1
> ]{code}
> And  debugging the code, the output values is correct, but the null_bitmap isn't updated and keep the original null_bitmap
> In the file *{{vector_replace.cc}}*  on line 202, the bitmap is updated only for turnoff the null replacement values
> !image-2021-11-22-15-51-30-120.png!
> This is and expected behavior or an issue on *{{ReplaceWithArrayMask}}* ? 



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