[RANGER-1054] Enhance column masking feature to support custom value/expression

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.6.0
• Fix Version/s: 0.6.0
• Component/s: plugins
• Assignee: Madhan Neethiraj
• Reporter: Madhan Neethiraj
• Created: 23/Jun/16 07:51
• Updated: 19/Mar/17 22:15
• Resolved: 24/Jun/16 05:18

Description

Column-masking feature supports a number of masking types - like mask/mask_first_4/mask_last_4/mask_show_first_4/.. Adding support to enable custom value or expression can make this feature easily extendable, to address various use cases. For example:

- to show only first 4 digits of ccn field, the expression would be 'substr({col}, 0, 4)'
- to show only last 4 digits of ccn field, the expression would be 'substr({col}, length({col} - 3)'