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Uwe L. Korn commented on ARROW-1561: ------------------------------------ I'm doing the JIRAs currently that lead up to this here. Won't be there for 0.11 > [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 > Assignee: Uwe L. Korn > Priority: Major > Labels: Analytics > Fix For: 0.12.0 > > > 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 -- This message was sent by Atlassian JIRA (v7.6.3#76005)