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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