Airblader opened a new pull request #16053:
URL: https://github.com/apache/flink/pull/16053


   ## What is the purpose of the change
   
   Quotes options when executing `SET;` to list all current options. This 
aligns the output with the new quoted syntax added to the parser. While SQL 
client does currently still support the unquoted syntax for compatibility, we 
eventually want to deprecate and remove it as it requires special parsing 
outside the parser. This change encourages users to use the quoted syntax by 
consistently quoting in Flink itself.
   
   ## Brief change log
   
   * Quote options when calling `SET;`
   
   ## Verifying this change
   
   This change is already covered by existing tests.
   
   ## Does this pull request potentially affect one of the following parts:
   
     - Dependencies (does it add or upgrade a dependency): no
     - The public API, i.e., is any changed class annotated with 
`@Public(Evolving)`: no
     - The serializers: no
     - The runtime per-record code paths (performance sensitive): no
     - Anything that affects deployment or recovery: JobManager (and its 
components), Checkpointing, Kubernetes/Yarn/Mesos, ZooKeeper: no
     - The S3 file system connector: no
   
   ## Documentation
   
     - Does this pull request introduce a new feature? no
     - If yes, how is the feature documented? not applicable
   


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