strongduanmu commented on issue #24899:
URL: 
https://github.com/apache/shardingsphere/issues/24899#issuecomment-1489784451

   > All the data should come from ShardingSphereDatabase.schemas.
   
   ShardingSphereDatabase.schemas only contains table metadata, the actual data 
of pg_class and pg_namespace are stored in sys_data znode. These data were 
collected from native postgresql via a timed task, performed every 30s.
   


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