ALTER TRIGGER
Name
   ALTER TRIGGER
   --    change the definition of a trigger
  
Synopsis
ALTER TRIGGER trigger ON table
    RENAME TO newname
      Inputs
   
    
-  trigger 
- 	The name of an existing trigger to alter.
        
-  table 
- 	The name of the table on which this trigger acts.
        
-  newname 
- 	New name for the existing trigger.
        
   
    Outputs
   
    
- ALTER TRIGGER
- 	Message returned from trigger renaming.
        
- ERROR
- 	Message returned if trigger is not available, or new name is a duplicate of another existing trigger on the table.
        
   
   Description
  
   ALTER TRIGGER changes the definition of an existing trigger.
   The RENAME clause causes the name of a trigger on the given table
   to change without otherwise changing the trigger definition.
  
   You must own the table on which the trigger acts in order to change its properties.
  
    Notes
   
    Refer to CREATE TRIGGER for a further description
    of valid arguments.
   
   Usage
  
   To rename an existing trigger:
   
ALTER TRIGGER emp_stamp ON emp RENAME TO emp_track_chgs;
   
  
   Compatibility
  
SQL92
    The clause to rename triggers is a
    PostgreSQL extension from SQL92.