File Management - IBM

90 File Management V4R5
Copying only certain members or labels within a file
For database or diskette files, you first specify a generic name on the FROMMBR
or FROMLABEL parameter. You then modify the generic name to indicate the
starting character string that each member or label has in common, then follow it
with an * (asterisk). For example, if you specified FROMMBR(ORD*), the copy
command would copy all database members or diskette labels that start with ORD.
Note:
v If a generic name is specified for the FROMLABEL parameter on the
CPYFRMDKT command and a LABEL parameter value is also specified
on an Override Diskette File (OVRDKTF) command, the command copies
only the single-file label identifier that you specified on the override.
v If you copy a generic set from a diskette, and a label that is being copied
continues on another diskette volume, then the copy command copies all
the affected labels on the continuation volume. This is also true when you
copy all labels.
Specifying the label identifier or member name for the copy
operation
If you specify TOMBR (*FIRST), the copy operation does not specify a label
identifier. Therefore, you must specify a label identifier (LABEL parameter) either:
v In the device file on an OVRDKTF command (for a diskette file) OR
v On an OVRTAPF command (for a tape file)
If you specify the special value *FIRST, *DKTF, or *TAPF on the copy command,
then the copy command uses the label from the device file description.
If the from-file is diskette or tape, the copy command uses the from-file label as
the label for a diskette or tape to-file. If the to-file is a database file, the command
uses the nonblank characters to the extreme right of the from-file label for the
member name of the to-file. The command uses up to a maximum of either 10
characters or to the period at the extreme right in the from-file label. The copy
operation uses only valid member names for a database to-file. It does not ensure
that a to-file label is valid for tape or diskette, so a label identifier that is
nonstandard or not valid may be used for the to-file.
If the from-file is a tape file that is not labeled, then a to-file member or label name
is created that corresponds to the data file on the tape from-file in the form of
CPYnnnnn, where nnnnn is the tape sequence number of the data file.
If you specify a tape or diskette label in the FROMMBR or TOMBR parameter, it
can have a maximum length of 10 characters. If the label contains special
characters or more than 10 characters, you must specify the label on one of the
following commands:
v Create Tape File (CRTTAPF)
v Change Tape File (CHGTAPF)
v Override with Tape File (OVRTAPF)
v Create Diskette File (CRTDKTF)
v Change Diskette File (CHGDKTF)
v Override with Diskette File (OVRDKTF)