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Deleting overrides<br />
54 <strong>File</strong> <strong>Management</strong> V4R5<br />
described data and a different field level file is used at run time, it is usually<br />
necessary to specify LVLCHK(*NO) on the override. See “Redirecting files” on<br />
page 64 for details.<br />
The following example shows how overrides work when compiling a program:<br />
Override 1 OVRDBF FILE(RPGSRC) +<br />
TOFILE(SRCPGMS) MBR(INVN42)<br />
Override 2 OVRPRTF FILE(OUTPUT) TOFILE(REPORTS)<br />
CALL PGM(A)<br />
Program A<br />
Override 3 OVRPRTF FILE(LISTOUT) +<br />
TOFILE(OUTPUT)<br />
Override 4 OVRDBF FILE(RPGSRC) WAITFILE(30)<br />
CRTRPGPGM PGM(INVENTORY) +<br />
SRCFILE(RPGSRC)<br />
RETURN<br />
Override 5 OVRPRTF FILE(LISTOUT) +<br />
TOFILE(REPORTS) LPI(8)<br />
CALL PGM(INVENTORY)<br />
The program INVENTORY opens the printer file REPORTS in place of printer file<br />
LISTOUT and creates output at 8 lines per inch.<br />
The program INVENTORY is created (compiled) from the member INVN42 in the<br />
database file SRCPGMS. Override 4, which is applied first, overrides an optional<br />
file attribute. Override 1, which is applied last, causes the file RPGSRC to be<br />
overridden with the database file SRCPGMS, member INVN42.<br />
The program INVENTORY is created with the printer formats from the file<br />
REPORTS. Assume that the source for the program INVENTORY, which is taken<br />
from file SRCPGMS and member INVN42, contains an open to the printer file<br />
LISTOUT. Override 3, which is applied first, causes the file LISTOUT to be<br />
overridden with OUTPUT. Override 2, which is applied last, overrides OUTPUT<br />
with REPORTS. Other attributes may be specified here, but it is not necessary<br />
because only the record formats are used at compile time.<br />
At run time, override 3 is no longer active, because program A has ended.<br />
Therefore override 2 has no effect on LISTOUT. However, override 5, which is<br />
active at run time, replaces LISTOUT with REPORTS and specifies 8 lines per inch.<br />
Because the same file is used for compilation and run-time, you can leave level<br />
checking on.<br />
When a program that has been called returns control to the calling program, the<br />
system deletes any overrides specified in the call level of the called program. This<br />
does not include overrides that are scoped to the activation group level or the job<br />
level. Overrides that are scoped to the activation group level remain in effect until<br />
they are explicitly deleted, replaced, or until the activation group in which they are<br />
specified is deleted. Overrides that are scoped to the job level remain in effect until<br />
they are explicitly deleted, replaced, or until the job in which they are specified<br />
ends.
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