Instructs RDO not to execute the data manipulation statements you
    issue in an interactive RDO session. You can use the NOEXECUTE
    option in conjunction with RDMS$DEBUG_FLAGS to examine the
    estimated cost and access strategy associated with a query.
    Although the query will not be executed, the access strategies
    will still be displayed. See the Oracle Rdb Guide to Database
    Maintenance and Performance for information on using RDMS$DEBUG_
    FLAGS.

    The SET COMMAND EXECUTE statement is available only in RDO.