dusukang opened a new pull request, #19741:
URL: https://github.com/apache/flink/pull/19741

   ## What is the purpose of the change
   Use MysqlCatalog to get the primary key of the table when there are tables 
with same name in different databases.
   
   ## Brief change log
   Pass the database name as catalog parameter for retrieving primary keys by 
full table identifier in `metaData.getPrimaryKeys(database, schema, table)`
   
   ## Verifying this change
   This change is a code cleanup without any test coverage.
   
   ## 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, ZooKeeper: (no)
     - The S3 file system connector: (no)
   
   ## Documentation
   
     - Does this pull request introduce a new feature? (no)
   


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