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https://issues.apache.org/jira/browse/ARROW-1561?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Micah Kornfield resolved ARROW-1561.
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Resolution: Fixed
Fix Version/s: (was: 1.0.0)
0.15.0
Issue resolved by pull request 4235
[https://github.com/apache/arrow/pull/4235]
> [C++] Kernel implementations for "isin" (set containment)
> ---------------------------------------------------------
>
> Key: ARROW-1561
> URL: https://issues.apache.org/jira/browse/ARROW-1561
> Project: Apache Arrow
> Issue Type: New Feature
> Components: C++
> Reporter: Wes McKinney
> Priority: Major
> Labels: Analytics, pull-request-available
> Fix For: 0.15.0
>
> Time Spent: 21h 20m
> Remaining Estimate: 0h
>
> isin determines whether each element in the left array is contained in the
> values in the right array. This function must handle the case where the right
> array has nulls (so that null in the left array will return true)
> {code}
> isin(['a', 'b', null], ['a', 'c'])
> returns [true, false, null]
> isin(['a', 'b', null], ['a', 'c', null])
> returns [true, false, true]
> {code}
> May need an option to return false for null instead of null
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