GitHub user bobbai00 added a comment to the discussion: Refactor: Decoupling 
Direct Database Connection From ComputingUnitMaster & ComputingUnitWorker

I added the "Motivation of this refactoring" section.

For the two blockers:
1. The concern of exposing the physical plan to frontend is valid. There are 
two ways to address it: (1) encrypt the physical plan sent to the frontend; (2) 
frontend still sends the logical plan to CU, and CU sends a request to 
WorkflowCompilingService to compile logical plan to physical plan. I think (2) 
might be the way to go.
2.  This is addressed by switching to RESTCatalog.

GitHub link: 
https://github.com/apache/texera/discussions/5295#discussioncomment-17117918

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