[jira] [Created] (RANGER-1054) Enhance column masking feature to support custom value/expression

["Madhan Neethiraj (JIRA)" <ji...@apache.org>]

Madhan Neethiraj created RANGER-1054:
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             Summary: Enhance column masking feature to support custom value/expression
                 Key: RANGER-1054
                 URL: https://issues.apache.org/jira/browse/RANGER-1054
             Project: Ranger
          Issue Type: Bug
          Components: plugins
    Affects Versions: 0.6.0
            Reporter: Madhan Neethiraj
            Assignee: Madhan Neethiraj


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:
{noformat}
- 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)'
{noformat}



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