pg_description #
   The catalog pg_description stores optional descriptions
   (comments) for each database object.  Descriptions can be manipulated
   with the COMMENT command and viewed with
   psql's \d commands.
   Descriptions of many built-in system objects are provided in the initial
   contents of pg_description.
  
   See also pg_shdescription,
   which performs a similar function for descriptions involving objects that
   are shared across a database cluster.
  
Table 51.19. pg_description Columns
| Column Type Description | 
|---|
| 
        The OID of the object this description pertains to | 
| 
        The OID of the system catalog this object appears in | 
| 
        
       For a comment on a table column, this is the column number (the
        | 
| 
        Arbitrary text that serves as the description of this object |