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https://issues.apache.org/jira/browse/SPARK-23901?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16514687#comment-16514687
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Marco Gaido commented on SPARK-23901:
-------------------------------------
These functions can be used as any other function in Hive, they are not just
there for the Hive authorizer. I think the use case for them is to anonymize
data for privacy reasons (eg. expose/export to other parties data without
providing sensible data, but still being able to use them in joins).
> Data Masking Functions
> ----------------------
>
> Key: SPARK-23901
> URL: https://issues.apache.org/jira/browse/SPARK-23901
> Project: Spark
> Issue Type: Sub-task
> Components: SQL
> Affects Versions: 2.3.0
> Reporter: Xiao Li
> Assignee: Marco Gaido
> Priority: Major
> Fix For: 2.4.0
>
>
> - mask()
> - mask_first_n()
> - mask_last_n()
> - mask_hash()
> - mask_show_first_n()
> - mask_show_last_n()
> Reference:
> [1]
> [https://cwiki.apache.org/confluence/display/Hive/LanguageManual+UDF#LanguageManualUDF-DataMaskingFunctions]
> [2] https://issues.apache.org/jira/browse/HIVE-13568
>
>
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