godfreyhe opened a new pull request #12435:
URL: https://github.com/apache/flink/pull/12435


   
   
   ## What is the purpose of the change
   
   *when executing create catalog statement (e.g. create CATALOG c1 
with('type'='generic_in_memory') in sql client, "SqlClientException: 
Unsupported command: CREATE CATALOG" will occur. The reason is CliClient class 
does not handle CREATE_CATALOG command. Similar case is drop catalog statement.*
   
   
   ## Brief change log
   
     - *Handle CREATE_CATALOG and DROP_CATALOG command in CliClient*
     - *Code cleanup in CliClient*
   
   
   ## Verifying this change
   
   
   This change added tests and can be verified as follows:
   
     - *added testCreateCatalog method and testDropCatalog method in 
CliClientTest *
   
   ## Does this pull request potentially affect one of the following parts:
   
     - Dependencies (does it add or upgrade a dependency): (yes / **no**)
     - The public API, i.e., is any changed class annotated with 
`@Public(Evolving)`: (yes / **no**)
     - The serializers: (yes / **no** / don't know)
     - The runtime per-record code paths (performance sensitive): (yes / **no** 
/ don't know)
     - Anything that affects deployment or recovery: JobManager (and its 
components), Checkpointing, Kubernetes/Yarn/Mesos, ZooKeeper: (yes / **no** / 
don't know)
     - The S3 file system connector: (yes / **no** / don't know)
   
   ## Documentation
   
     - Does this pull request introduce a new feature? (yes / **no**)
     - If yes, how is the feature documented? (not applicable / docs / JavaDocs 
/ **not documented**)
   


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