Calls an editor that lets you edit the RDO statements you have
    issued within a terminal session. By default, Oracle Rdb uses the
    EDT editor. You can use the editor to modify your previous RDO
    statements, construct your next statement or group of statements,
    or include a file with other statements.

    Example using EDT to edit an RDO statement:

    RDO> FOR J IN JOSB PRINT J.JOB_TITLE END_FOR
    %RDO-F-RELNOTDEF, Relation JOSB is not defined in database
    RDO> EDIT

    FOR J IN JOSB PRINT J.JOB_TITLE END_FOR
    [EOB]