[ARROW-971] [C++/Python] Implement Array.isvalid/notnull/isnull as scalar functions

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.0.0
• Component/s: C++
• Labels: dataframe pull-request-available
• External issue URL: https://github.com/apache/arrow/issues/16570
• Assignee: Ben Kietzman
• Reporter: Wes McKinney
• Created: 08/May/17 00:55
• Updated: 11/Jan/23 07:11
• Resolved: 16/Jun/20 22:03

Description

For arrays with nulls, this amounts to returning the validity bitmap. Without nulls, an array of all 1 bits must be constructed. For isnull, the bits must be flipped (in this case, the un-set part of the new bitmap must stay 0, though).

Issue Links

• is a child of: ARROW-8894 [C++] C++ array kernels framework and execution buildout (umbrella issue)
• links to: GitHub Pull Request #1378
• links to: GitHub Pull Request #7410