ALTER TRIGGER — change the definition of a trigger
ALTER TRIGGERnameONtable_nameRENAME TOnew_nameALTER TRIGGERnameONtable_name[ NO ] DEPENDS ON EXTENSIONextension_name
   ALTER TRIGGER changes properties of an existing
   trigger.
  
   The RENAME clause changes the name of
   the given trigger without otherwise changing the trigger
   definition.
   If the table that the trigger is on is a partitioned table,
   then corresponding clone triggers in the partitions are
   renamed too.
  
   The DEPENDS ON EXTENSION clause marks
   the trigger as dependent on an extension, such that if the extension is
   dropped, the trigger will automatically be dropped as well.
  
You must own the table on which the trigger acts to be allowed to change its properties.
nameThe name of an existing trigger to alter.
table_nameThe name of the table on which this trigger acts.
new_nameThe new name for the trigger.
extension_name
      The name of the extension that the trigger is to depend on (or no longer
      dependent on, if NO is specified).  A trigger
      that's marked as dependent on an extension is automatically dropped when
      the extension is dropped.
     
    The ability to temporarily enable or disable a trigger is provided by
    ALTER TABLE, not by
    ALTER TRIGGER, because ALTER TRIGGER has no
    convenient way to express the option of enabling or disabling all of
    a table's triggers at once.
   
To rename an existing trigger:
ALTER TRIGGER emp_stamp ON emp RENAME TO emp_track_chgs;
To mark a trigger as being dependent on an extension:
ALTER TRIGGER emp_stamp ON emp DEPENDS ON EXTENSION emplib;
   ALTER TRIGGER is a PostgreSQL
   extension of the SQL standard.