AndrewKL commented on issue #26740: [SPARK-30053][SQL] Add the ability for v2 
datasource so specify a vacuum action on the table
URL: https://github.com/apache/spark/pull/26740#issuecomment-560939075
 
 
   > * I read through the JIRA issue and see VACUUM is being supported for some 
systems. But do you have any custom data source which requires this, and if you 
have one could you please elaborate the plan? Without actual use case I'm not 
sure it's being accepted.
   > *
   
   We have a custom Datasource where users can "DELETE" records from the table. 
 Internal these records are tomb stoned, instead of actually deleted.  This is 
a common design pattern in many relation table storage formats.
   
   https://en.wikipedia.org/wiki/Tombstone_(data_store)
   
   For GDPR compliance users would like to be able to force the cleanup process 
instead of waiting on an automated system to clean things up.

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