ROLLBACK TO SAVEPOINT
  SQL - Language Statements
 
 
  ROLLBACK TO SAVEPOINT
  roll back to a savepoint
 
 
  ROLLBACK TO SAVEPOINT
 
 
  savepoints
  rolling back
 
 
ROLLBACK [ WORK | TRANSACTION ] TO [ SAVEPOINT ] savepoint_name
 
 
  Description
  
   Roll back all commands that were executed after the savepoint was
   established.  The savepoint remains valid and can be rolled back to
   again later, if needed.
  
  
   ROLLBACK TO SAVEPOINT> implicitly destroys all savepoints that
   were established after the named savepoint.
  
 
 
  Parameters
  
   
    savepoint_name>
    
     
      The savepoint to roll back to.
     
    
   
  
 
 
  Notes
  
   Use  to destroy a savepoint without
   discarding the effects of commands executed after it was established.
  
  
   Specifying a savepoint name that has not been established is an error.
  
  
   Cursors have somewhat non-transactional behavior with respect to
   savepoints.  Any cursor that is opened inside a savepoint will be closed
   when the savepoint is rolled back.  If a previously opened cursor is
   affected by a 
   FETCH> command inside a savepoint that is later rolled
   back, the cursor position remains at the position that FETCH>
   left it pointing to (that is, FETCH> is not rolled back).
   Closing a cursor is not undone by rolling back, either.
   A cursor whose execution causes a transaction to abort is put in a
   can't-execute state, so while the transaction can be restored using
   ROLLBACK TO SAVEPOINT>, the cursor can no longer be used.
  
 
 
  Examples
  
   To undo the effects of the commands executed after my_savepoint
   was established:
ROLLBACK TO SAVEPOINT my_savepoint;
  
  
   Cursor positions are not affected by savepoint rollback:
BEGIN;
DECLARE foo CURSOR FOR SELECT 1 UNION SELECT 2;
SAVEPOINT foo;
FETCH 1 FROM foo;
 ?column? 
----------
        1
ROLLBACK TO SAVEPOINT foo;
FETCH 1 FROM foo;
 ?column? 
----------
        2
COMMIT;
   
 
 
  Compatibility
  
   The SQL> standard specifies that the key word
   SAVEPOINT> is mandatory, but PostgreSQL>
   and Oracle> allow it to be omitted.  SQL allows
   only WORK>, not TRANSACTION>, as a noise word
   after ROLLBACK>.  Also, SQL has an optional clause
   AND [ NO ] CHAIN> which is not currently supported by
   PostgreSQL>.  Otherwise, this command conforms to
   the SQL standard.
  
 
 
  See Also