CDO> START_TRANSACTION.
  CDO> DEFINE RECORD REC2.
  cont> FLD1. END RECORD.
  CDO> COMMIT
  CDO> SHOW RECORD REC2
  Definition of record REC2
  |   Contains field           FLD1
  .
  .
  .

      In this example, the COMMIT command ends a session started
      with the START_TRANSACTION command. When you use the START_
      TRANSACTION and COMMIT commands, the overhead that is
      associated with these commands is incurred once in the
      repository and once in the database, rather than once for each
      CDO command between the START_TRANSACTION and COMMIT commands.
      The repository is already attached to the database and has
      already loaded the type definitions.