pg_rewrite
   The catalog pg_rewrite stores rewrite rules for tables and views.
  
Table 51.43. 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.