ggershinsky commented on pull request #32895:
URL: https://github.com/apache/spark/pull/32895#issuecomment-879985147


   > I believe you are the best person to do that in this PR.
   > 
   > > If other community members get to test and verify PME via SQL interface, 
I think it would be a good future addition to this section.
   
   I should have mentioned that besides testing and documenting, this will 
require a substantial coding work on developing a KMS client class (for a 
selected KMS) and integrating it in Spark SQL. As I mentioned, Parquet doesn't 
contain client classes for any particular KMS, because there are too many of 
them, and because it's expensive to maintain these classes  (basically 
impossible, given the Parquet release cycle). So having a SQL API sample has a 
high price, and a limited benefit - Spark runs with Parquet encryption in many 
deployments today, with the Scala API and various KMS systems.


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