Index for Section TO

Alphabetical listing for R

Bottom of page

ROLLBACK
NAME
  ROLLBACK TO SAVEPOINT - roll back to a savepoint

SYNOPSIS
  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 RELEASE SAVEPOINT [release_savepoint(5)] 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 the savepoint is not closed
  when the savepoint is rolled back. If a 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).  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:2003 standard specifies that the key word SAVEPOINT is mandatory,
  but PostgreSQL and Oracle allow it to be omitted. SQL:2003 allows only
  WORK, not TRANSACTION, as a noise word after ROLLBACK. Also, SQL:2003 has
  an optional clause AND [ NO ] CHAIN which is not currently supported by
  PostgreSQL. Otherwise, this command conforms to the SQL standard.

SEE ALSO
  BEGIN [begin(5)], COMMIT [commit(l)], RELEASE SAVEPOINT
  [release_savepoint(l)], ROLLBACK [rollback(l)], SAVEPOINT [savepoint(l)]

Index for Section TO

Alphabetical listing for R

Top of page