pg_rewrite
   The catalog pg_rewrite stores rewrite rules for tables and views.
  
Table 48.49. pg_rewrite Columns
Column Type Description  | 
|---|
        Row identifier  | 
        Rule name  | 
        The table this rule is for  | 
        
       Event type that the rule is for: 1 =   | 
        
       Controls in which session_replication_role modes
       the rule fires.
         | 
        
       True if the rule is an   | 
        
       Expression tree (in the form of a
         | 
        
       Query tree (in the form of a
         | 
    pg_class.relhasrules
    must be true if a table has any rules in this catalog.