VMS Help  —  RDML72  Statements  DATABASE  Format
  (B)0INVOKE DATABASE qqqqqqqqwqqqqqqqqqqqqq>qqqqqqqqqqqwqqqqqqqqqqqqqqqqk
                          mqq> db-handle-options qqqj                x
                                                                     x
          lqqqqqqqqqqqqqqqqqqqqqqqqq<qqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqj
          mqwqqqqqqqqqq>qqqqqqqqqwqqwqq> PATHNAME qqq> path-name qqwqqk
            mqq>  COMPILETIME qqqj  mqq> FILENAME qqq> file-spec qqj  x
          lqqqqqqqqqqqqqqqqqqqqqqqqqq<qqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqj
          mqwqqqqqqqqqqqqqqqqqqqqqqqqqq>qqqqqqqqqqqqqqqqqqqqqqqqqqqwqqk
            mqq>  RUNTIME FILENAME qqqqwqqqq> file-spec qqqqqqqqwqqj  x
                                       mqqqq> host-variable qqqqj     x
          lqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqj
          mqqqqwqqqqqqqqqqqqqqqqqq>qqqqqqqqqqqqqqqqqqqwqqqqqqqqqqqqqqqk
               mq> DBKEY SCOPE IS qqwq> COMMIT qqqqqqqu               x
                                    mq> FINISH qqqqqqqj               x
          lqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqj
          mqwqqqqqqqqqqqqqqqqqqqqqq>qqqqqqqqqqqqqqqqqqqqqqwqqq>
            mq> REQUEST_HANDLE SCOPE IS qwq> DEFAULT qqwqqj
                                         mq> FINISH qqqj

  (B)0db-handle-options =

     qqqqqqqwqqqq> db-handle    q> = qwqqqqqqqqqqqqqqqqqqwwq>
            x                         mq> handle-scope qqjx
            x                                             x
            mqqwq>qqqqqqqqqqqqqqqqwqq> db-handle qq> = qqqj
               x                  x
               mq> handle-scope qqj

  (B)0handle-scope =

  qqwqqqqqwqqwqqq> GLOBAL qqqqqqqqwqqwqqqqqwq>
    m> [ qj  x                    x  m> ] qj
             tqqq> EXTERNAL qqqqqqu
             x                    x
             mqqq> LOCAL qqqqqqqqqj

1  –  Format arguments

    db-handle-options      Database handle options. Allows you to
                           specify a database handle and its scope.

    db-handle              Database handle. A host variable used
                           to refer to a specific database you have
                           invoked. For more information see the
                           entry on the Database Handle clause.

    handle-scope           Specifies the scope of the database
                           handle. Note that you can enclose the
                           scope of a database handle in brackets,
                           for example: [GLOBAL].

    GLOBAL                 Specifies that the database is global
                           to all modules in an image. This allows
                           you to have a single transaction across
                           multiple modules.

    EXTERNAL               Specifies that the database is actually
                           accessed through another module.

    LOCAL                  Specifies that the database is local to
                           the module in which it is declared.

    COMPILETIME            The source of the database definitions
                           when the program is compiled. For Oracle
                           Rdb this can be either a CDD path name or
                           a file specification. If you specify only
                           the compiletime identifier and omit the
                           run-time identifier, Oracle Rdb uses the
                           compile-time identifier for both compiling
                           and running the program.  For example, RDML
                           will mistakenly use 'CDD$TOP.PERSONNEL' as
                           the run-time database file name in the
                           following example:

                           DATABASE COMPILETIME PATHNAME 'CDD$TOP.PERSONNEL';

                           However, RDML will correctly interpret the
                           following:

                           DATABASE COMPILETIME PATHNAME 'CDD$TOP.PERSONNEL'
                                    RUNTIME FILENAME 'PERSONNEL';

    path-name              A full or relative CDD path name, enclosed
                           in quotation marks, specifying the source
                           of the database definition. Use single
                           quotes (' ') when the host language is
                           Pascal. Use double quotes (" ") when the
                           host language is C.

    file-spec              File specification. A full or partial file
                           specification, or logical name enclosed in
                           quotation marks, specifying the source of
                           the database. Use single quotes (' ') when
                           the host language is Pascal. Use double
                           quotes (")  when the host language is C.

    RUNTIME FILENAME       The source of the database definitions
                           when the program is run. This can be
                           either a file specification or a host
                           variable. If you do not specify this
                           parameter, Oracle Rdb uses the compile-
                           time identifier for both compiling and
                           running the program.

    host-variable          A valid host language variable that
                           equates to a database file specification.

    DBKEY SCOPE COMMIT     The DBKEY SCOPE clause controls when the
                           database key (dbkey) of an erased record
                           may be reused by Oracle Rdb. When the DBKEY
                           SCOPE is COMMIT, (the default), Oracle Rdb
                           cannot reuse the DBKEY of an erased
                           record (to store another record) until
                           the transaction that erased the original
                           record completes (by entering COMMIT). If
                           the user who erased the original record
                           enters a ROLLBACK statement, then the
                           dbkey cannot be reused by Oracle Rdb.

    DBKEY SCOPE FINISH     Controls when the dbkey of an erased
                           record may be reused by Oracle Rdb. When
                           DBKEY SCOPE IS FINISH, Oracle Rdb cannot
                           reuse the dbkey (to store another record)
                           until the user who erased the original
                           record unbinds from the database (usually,
                           by issuing a FINISH statement). With DBKEY
                           SCOPE FINISH, an RDML program can complete
                           one or several transactions and, while
                           still attached to the database, use the
                           dbkey obtained during a STORE operation to
                           directly access those records.

    REQUEST HANDLE SCOPE   RDML automatically initializes any request
    DEFAULT                handles it generates that are in the same
                           compilation unit as the FINISH statement.
                           RDML does not reinitialize any user-
                           specified request handles nor does it
                           reinitialize any request handles that are
                           outside of the compilation unit where the
                           request is initiated. With this option,
                           the value of the request handle is not set
                           to zero after the RDML FINISH statement
                           executes. REQUEST_HANDLE SCOPE DEFAULT is
                           the default.

    REQUEST HANDLE SCOPE   The value of the request handle is set
    FINISH                 to zero after the RDML FINISH statement
                           executes.

                           The SQL FINISH statement initializes
                           all request handles in all compilation
                           units in a program. The RDBPRE and RDML
                           preprocessors allow programs to define
                           and manipulate request handles. If you
                           do not want your request handles to be
                           reinitialized, then you must use RDML or
                           RDBPRE (not SQL) to do the attach, and you
                           must use REQUEST_HANDLE SCOPE IS DEFAULT.
Close Help