[IMPALA-9598] Add builtin functions for masking middle of the string

• Type: New Feature
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Component/s: Backend
• Epic Link: Ranger Column Masking
• Epic Color: ghx-label-2
• Assignee: Unassigned
• Reporter: Quanlong Huang
• Created: 03/Apr/20 02:33
• Updated: 22/Dec/20 20:43

Description

It's a common requirement that showing both the first m and last n chars of the phone number. We can provide a builtin function for this. The definition can be

mask_middle_n(value, firstCharCount, lastCharCount, upperChar, lowerChar,
    digitChar, otherChar, numberChar)
mask_show_middle_n(value, firstCharCount, lastCharCount, upperChar, lowerChar,
    digitChar, otherChar, numberChar)

Sub-Tasks

• [DOC]: Document builtin functions for masking middle of the string: Open