ILE COBOL Language Reference
This part specifies the type of device that the file will use. The
compiler can then check whether the file is described and used in a consistent
manner. See the ILE COBOL for AS/400
Programmer's Guide for further information.
Notes:
- The compiler does not check whether the device associated with the
external file is of the type specified in the device portion of
assignment-name-1 or literal-1.
- The compiler provides no diagnostics unless the I-O verbs were used in an
inconsistent manner.
- When the program runs, the operating system could either issue an escape
message or ignore the function if it was not applicable to the device.
For further information on overriding files, refer to the File Systems
and Management section of the Database and File Systems
category in the iSeries Information Center at this Web site - http://www.ibm.com/eserver/iseries/infocenter.
+-------------------------------IBM Extension--------------------------------+
The device that the file will use can be changed at run time with the
OVRxxxF CL command. To ensure consistent results, the device type
associated with the file should correspond to that given in the
assignment-name.
+----------------------------End of IBM Extension----------------------------+
Device can be any of the following:
- Device
- Associated file
- PRINTER
- PRINTER should be specified for program described printer files
only.
- FORMATFILE
- FORMATFILE should be specified for externally described printer files
only. For more information on how to use externally described printer
files see the section on FORMATFILE files in the ILE COBOL
for AS/400 Programmer's Guide.
- TAPEFILE
- Tape file
- DISKETTE
- Diskette file
- DISK
- Any physical database file or single format logical database file.
When DISK is the device, database extensions cannot be used, but dynamic file
creation is supported. See the ILE COBOL for AS/400
Programmer's Guide for more information about DISK files.
See OPEN Statement Considerations for information about Dynamic File Creation.
- DATABASE
- Any database file (or DDM file). When DATABASE is the device,
externally described data and database extensions can be used, but dynamic
file creation is not supported.
- WORKSTATION
- Display file or ICF file.
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