This statement allows the executing SQL script to save output to
    an OpenVMS file.

    Output from interactive SQL will be written to the file-spec
    specified. If the "ECHO" logfile-option is used, in addition
    to writing the output to the designated file, all commands
    and errors generated by interactive SQL are also written to
    SYS$OUTPUT. If the "NOECHO" logfile-option is used, output to
    SYS$OUTPUT is disabled. All commands and errors generated by
    interactive SQL are only written to the output file.

    The SET LOGFILE is functionally equivalent to the SET OUTPUT
    statement.

    A SET LOGFILE command that does not specify a file is equivalent
    to SET NOLOGFILE.