[GitHub] [spark] vinodkc commented on pull request #38146: [SPARK-40687][SQL] Support data masking built-in Function 'mask'

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vinodkc commented on PR #38146:
URL: https://github.com/apache/spark/pull/38146#issuecomment-1272016984

   @HyukjinKwon , this PR is a generic approach to mask the string based on the arguments. This mask function can be applied to any string value and it does not expect a pattern on the input string. Apache Hive **mask** function has the same logic.
   Eg: 
   Arguments:
         * input      - string value to mask. Supported types: STRING, VARCHAR, CHAR
         * upperChar  - character to replace upper-case characters with. Specify -1 to retain the original character. Default value: 'X'
         * lowerChar  - character to replace lower-case characters with. Specify -1 to retain the original character. Default value: 'x'
         * digitChar  - character to replace digit characters with. Specify -1 to retain the original character. Default value: 'n'
         * otherChar  - character to replace all other characters with. Specify -1 to retain the original character. Default value: -1
   


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