MySQL 9.1 Release Notes
        
- id- The hash map's unique ID 
- version- Hash map version (integer) 
- state- Hash map state; see Object::State for values and descriptions. 
- fq_name- The hash map's fully qualified name 
        The hash_maps table is actually a view
        consisting of the four columns having the same names of the
        dict_obj_info table, as shown
        here:
      
CREATE VIEW hash_maps AS
  SELECT id, version, state, fq_name
  FROM dict_obj_info
  WHERE type=24;  # Hash map; defined in dict_obj_types
        See the description of
        dict_obj_info for more
        information.