File Management - IBM

not valid, a diagnostic message is issued and the copy operation ends. You must
left-justify the timestamp portion of the user-input field value; it can contain
trailing blanks.
Null-capable fields used by the INCREL parameter
The INCREL parameter allows a value of *NULL as input for a field value. You
can use the *EQ and *NE operators with the *NULL value to test whether a field in
a database file contains the null value or not. *EQ means that the value is null, and
*NE means that the value is not null when you specify the *NULL value. The
*NULL value is not limited to null-capable fields.
Different CCSIDs used by the INCREL parameter
The copy command assumes that the input string for character, DBCS-open,
DBCS-either, or DBCS-only fields are in the CCSID of the job in which the copy
command is running. The input string is converted to the CCSID of the from-field.
If no conversion table is defined or an error occurs while converting the input
string, a message is sent and the copy operation ends. If the copy command can
correctly convert the value, it uses the converted value for record selection.
DBCS-graphic fields used by the INCREL parameter
When you specify a graphic field for the INCREL parameter, you should enclose
the DBCS data in shift-out and shift-in characters. The copy command assumes
that the data is in the associated DBCS CCSID of the job CCSID. There must be a
valid conversion to the field CCSID. Otherwise, an error occurs. The shift-out and
shift-in characters are removed before doing the comparison.
Copying deleted records (COMPRESS Parameter)
Note: You can use this parameter on the CPYF command only.
You can copy deleted and undeleted records from one physical file member to
another by specifying COMPRESS(*NO) on a copy command.
You may want to copy deleted records to preserve the relative record numbers of
records that are copied from the from-file. If you do not use COMPRESS(*NO),
only records that are not deleted are copied from the from-file. There are
“Requirements of COMPRESS(*NO) parameter and the CPYF command”,
“Restrictions of COMPRESS(*NO) parameter and the CPYF command” on
page 104, and more “Details of COMPRESS(*NO) parameter and the CPYF
command” on page 104 about copying deleted records.
Requirements of COMPRESS(*NO) parameter and the CPYF
command
To use COMPRESS(*NO), the following conditions must be true:
v The from-file and to-file must both be physical files.
v The from-file and to-file must both be the same type (either source or data).
v The from-file and to-file must either have identical record formats or you must
specify FMTOPT(*NOCHK) to perform the copy.
v You must use all the following (default) parameter values on the copy
command:
– PRINT(*NONE)
Chapter 4. Copying files 103