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You cannot copy DDM files that contain user-defined types to AS/400 systems<br />
running at Version 4 Release 3 or earlier.<br />
Copying files that contain DataLinks<br />
You can specify CRTFILE(*YES) on the CPYF and CPYFRMQRYF commands when<br />
you copy files that contain DataLinks (DLs). If the from-file is an SQL table, view,<br />
or index that contains a DL, these commands create an SQL table.<br />
You cannot copy DDM files that contain DataLinks to AS/400 systems running at<br />
Version 4 Release 3 or earlier.<br />
DLs can be mapped only to other DLs. Therefore, if you specify *NONE, *MAP, or<br />
*DROP on the FMTOPT parameter, the from-file and to-file must have<br />
corresponding DLs. Truncation is not allowed. Shorter DLs, however, can be<br />
converted to longer DLs.<br />
A file can be linked only once on a system. Therefore, a copy that will perform<br />
mapping or that requires the formats to be identical (that is, *NONE, *MAP, or<br />
*DROP is specified on the FMTOPT parameter) will not be successful if<br />
corresponding from-file and to-file fields are both FILE LINK CONTROL. Copies<br />
that are performed using the *NOCHK parameter option are not restricted, but<br />
errors will occur if a DL that references a linked file is copied to a DL that is FILE<br />
LINK CONTROL.<br />
When you specify CRTFILE(*YES) on the CPYF or CPYFRMQRYF command, and<br />
the from-file contains a FILE LINK CONTROL DL field, the following statements<br />
are true, depending on how you specify the FMTOPT parameter:<br />
v If you specify *NONE, *MAP, or *DROP on the FMTOPT parameter, the file is<br />
created, but an error message is issued and no I/O is performed.<br />
v If you specify *NOCHK or *CVTSRC on the FMTOPT parameter, the file is<br />
created and I/O is attempted. The I/O will be unsuccessful for any records that<br />
contain a valid LINK.<br />
The following table shows LINK scenarios associated with the CPYF command<br />
when different FMTOPT values are used.<br />
LINK status for from-field to to-field when<br />
FMTOPT parameter is *MAP or *NONE<br />
FILE LINK CONTROL to FILE LINK<br />
CONTROL<br />
NO LINK CONTROL to FILE LINK<br />
CONTROL (with no truncation)<br />
FILE LINK CONTROL to NO LINK<br />
CONTROL (with no truncation)<br />
NO LINK CONTROL to NO LINK<br />
CONTROL (with no truncation)<br />
Copying files that contain large objects<br />
How linking is performed<br />
Not allowed. <strong>File</strong>s can be linked only once.<br />
Linking is performed.<br />
No linking is performed.<br />
No linking is performed.<br />
You can specify CRTFILE(*YES) on the CPYF and CPYFRMQRYF commands when<br />
you copy files that contain large objects (LOBs). If the from-file is an SQL table,<br />
view, or index that contains a LOB, these commands create an SQL table.<br />
Chapter 4. Copying files 135
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