In a particular program one file is used where override
command is applied to a file, now this program calls
another program where we want to use the same file but
without override.How it can be done?
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Answer Posted / david lex
The question is somewhat ambiguous. The OVRDBF command
contains MANY parameters, all of which have a very
different impact on the file.
Very often the OVRDBF is used to access the same file in a
different library, but that is not always the case.
It is also of note that the TYPE of programs are not
mentioned - are they CL, CLLE, OPM RPG, ILE RPG, COBOL...
or a combination? It does make a difference, specifically
as to whether you even need to take this approach.
The most common scenario is a CL overriding a file/Lib1 to
file/Lib2 then calling an RPG/Cobol pgm. But in this
scenario the override is generally required in the
RPG/Cobol program.
Answer one does not address the override. Unless using
embedded SQL or some non standard technique, one must
include the file being used in the F-specs regardless of an
override scenario.
Answer two (with nuances) will have the desired effect, but
there are other things to consider before merely removing
the override.
Do you need the override in place upon return to the
calling program? If you do, you'll have to re-issue the
override.
Additionally, the call level on the DLTOVR command must be
the same that was on the original OVRDBF issued, otherwise
it will fail (albeit silently) with something
like 'Override not found at specified level'.
Defaults on the system in question also come into play.
What is your default activation group?
There are a variety of ways to handle this, each with
strengths & weaknesses.
Embedded SQL, new activation groups, using a QUALIFIED file
opening, call stored procedures, exported procedures in a
service program, etc.
It VERY much depends on the original intention of the file
override to begin with.
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RETRIVING DELETED RECORDS :- I'm frequently asked how to retrieve deleted records from an unjournaled physical file when the deleted records have not yet been removed from the file. Utility UNDEL lets you undelete records in a physical file. This public domain program is available in CISC and RISC versions, and the complete source code is available for download at: UNDEL for AS/400 Save File (RISC): http://www.as400network.com/sharewarefiles/undelris.zip UNDEL for AS/400 Save File (CISC): http://www.as400network.com/sharewarefiles/undel.zip UNDEL for AS/400 Save File (Source code): http://www.as400network.com/sharewarefiles/undelsrc.zip The utility takes advantage of the fact that deleted records in physical files are only flagged as deleted, and the record data still exists until it is overwritten or the file is reorganized with a utility such as RGZPFM. UNDEL simply reads the deleted record, then reuses the record by writing over it with the new record (thus eliminating the flag for the deleted record). Some homegrown and commercial utilities copy the file containing undeleted records to a save file, then use a program to read the save file, which contains live and undeleted records, to a file to undelete the records. The UNDEL utility is superior to the SAVF technique because there's no need to copy the file to a save file, which is especially important for really large files. When run, UNDEL displays the physical file records in their unformatted, raw text form. You can either position the display to a given relative record number or use F19 or F20 to find the previous and next deleted record, respectively. The utility also includes online help, which is almost unheard of for free utilities. Other utilities include the ability to undelete records. You can use the RTVDLTRCD command in the old QUSRTOOL (no longer supported by IBM). QUSRTOOL is now a commercial product called TAA Productivity Tools ( http://www.taatool.com ). The free file editor WRKDBF has a built-in undelete capability ( http://www.wrkdbf.com ), and several commercial file editors can undelete records. For a complete list of file editors, go to http://www.sourcebook400.com, select "Programmer Tools" under "Product Category," then select "File Editors."
1.Load an runtime array of length 99 from the pf and you want to handle all the possible errors?
