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https://issues.apache.org/jira/browse/ARROW-14795?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Joris Van den Bossche updated ARROW-14795:
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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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