MySQL 8.0 Release Notes
        MySQL 8.0 Source Code Documentation
        
This view summarizes the types of objects within each schema. By default, rows are sorted by schema and object type.
Note
For MySQL instances with a large number of objects, this view might take a long time to execute.
          The schema_object_overview view
          has these columns:
- db- The schema name. 
- object_type- The object type: - BASE TABLE,- INDEX (,- index_type)- EVENT,- FUNCTION,- PROCEDURE,- TRIGGER,- VIEW.
- count- The number of objects in the schema of the given type.