[SPARK-40690] Support data masking built-in function 'mask_show_first_n'

• Type: Sub-task
• Status: Open
• Priority: Minor
• Resolution: Unresolved
• Affects Version/s: 3.4.0
• Component/s: SQL
• Assignee: Unassigned
• Reporter: Vinod KC
• Created: 07/Oct/22 00:19
• Updated: 08/Oct/22 15:44

Description

Support data masking built-in function 'mask_show_first_n'

Return a masked version of str, showing the first n characters unmasked . Upper case letters should be converted to "X", lower case letters should be converted to "x" and numbers should be converted to "n". For example, mask_show_first_n("1234-5678-8765-4321", 4) results in 1234-nnnn-nnnn-nnnn.