52.48. pg_shdescription
  The catalog
  
   pg_shdescription
  
  stores optional
   descriptions (comments) for shared database objects.  Descriptions can be
   manipulated with the
  
   
    COMMENT
   
  
  command and viewed with
  
   psql
  
  's
  
   \d
  
  commands.
 
  See also
  
   
    pg_description
   
  
  ,
   which performs a similar function for descriptions involving objects
   within a single database.
 
  Unlike most system catalogs,
  
   pg_shdescription
  
  is shared across all databases of a cluster: there is only one
   copy of
  
   pg_shdescription
  
  per cluster, not
   one per database.
 
   
    Table 52.48. 
    
     pg_shdescription
    
    Columns
   
  
| Name | Type | References | Description | 
|---|---|---|---|
       
        objoid
       
       | 
      
       
        oid
       
       | 
      any OID column | The OID of the object this description pertains to | 
       
        classoid
       
       | 
      
       
        oid
       
       | 
      
       
        
         
       | 
      The OID of the system catalog this object appears in | 
       
        description
       
       | 
      
       
        text
       
       | 
      Arbitrary text that serves as the description of this object |