[ARROW-14482] [C++][Gandiva] Implement MASK_FIRST_N and MASK_LAST_N functions

• Type: New Feature
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 7.0.0
• Component/s: C++ - Gandiva
• Labels: pull-request-available
• External issue URL: https://github.com/apache/arrow/issues/30041
• Assignee: Unassigned
• Reporter: Augusto Alves Silva
• Created: 26/Oct/21 22:44
• Updated: 11/Jan/23 08:40
• Resolved: 10/Dec/21 09:25

Description

MASK_FIRST_N

Returns a masked version of str with the first n values masked. Upper case letters are converted to "X", lower case letters are converted to "x" and numbers are converted to "n". For example, mask_first_n("1234-5678-8765-4321", 4) results in nnnn-5678-8765-4321.

MASK_LAST_N

Returns a masked version of str with the last n values masked. Upper case letters are converted to "X", lower case letters are converted to "x" and numbers are converted to "n". For example, mask_last_n("1234-5678-8765-4321", 4) results in 1234-5678-8765-nnnn.

Issue Links

• links to: GitHub Pull Request #11551