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How to read alternative records in a pf by using rpg?
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Answer / uday bagdi
we can create the pre-run time array so that data-base file come in our rpg program then we read that pre-run time array with loop and increment the array indexing by 2
| Is This Answer Correct ? | 7 Yes | 0 No |
Answer / uday bagdai
1st set the pointer on the record(depend on rrn).after increase the rrn value by 2 (rrn=rrn+2).trape their on doweq loop so you can read alternative records.because (your pointer set on alternative records)
| Is This Answer Correct ? | 6 Yes | 2 No |
Answer / abhishek
The first method is not very full proof. Actually it is not
necessary that RRN is always sequential.
Suppose initally there are 100 records in a file and so
does the RRN starts from 1 for first record and 100 for
last record.
If 1 record is deleted from the file RRN remains unchaned
and in that case adding 2 may cause a problem if system
does not get Record at that RRN it will read the next
sequential.
| Is This Answer Correct ? | 4 Yes | 0 No |
Answer / sreedhar reddy
Simple way is just read a PF process 1st record, then for second read ignore it. It is simple like having two read operations, first is at start of the loop and second is at just before end of the loop.
| Is This Answer Correct ? | 1 Yes | 1 No |
Answer / mahalakshmi
All the records in a file is first loaded in to an datastructure and then incrementing the value of datastructure +2 then read the values in the datastructure.
| Is This Answer Correct ? | 0 Yes | 0 No |
Answer / ramu
how to fetch alternate records from data base(pf) using RPG? (ex. 1st and 3rd and 5th .......etc)
I need Rpg code not theory?
| Is This Answer Correct ? | 0 Yes | 0 No |
Answer / krishna
sample code for alternative record in a pf
fsamplepfif e disk
/free
dow not %eof(samplepf);
read samplepf;
If %eof(samplepf);
Leave;
endif;
---------;(doing some actions based on the conditions)
read samplepf;
enddo;
*inlr = *on;
/end-free
| Is This Answer Correct ? | 1 Yes | 6 No |
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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."
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