i would like to know under what circumstance the object
will get locked on AS400.
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Answer / abhishek kumar
In most of the cases files(*file) will be locked.
Reason: If any program is using that particular file.
| Is This Answer Correct ? | 6 Yes | 1 No |
Answer / samul
File object locked when file open in update mode or file
allocated excl in cl using cmd ALLOBJ.
| Is This Answer Correct ? | 6 Yes | 1 No |
Answer / sankar prosad mohanta
Abhishek is correct, but we can avoid this file locking,
specifying 'N' in 53 position of File Description Spec,
where the file is defined in the program.
| Is This Answer Correct ? | 6 Yes | 2 No |
Answer / keshar jain
@Shankar:
We can use N on position 53 in CHAIN if file is in Update
mode. For other mode we can't specify N.
| Is This Answer Correct ? | 2 Yes | 0 No |
Answer / ravi
When a file is declared in UF mode. U - Update, F - Fully procedural file.
When you do a read, it locks the particular record making it unavailable for any other programs. This is to protect the data integrity.
Once you do the update, the lock will be released. If you do not want the lock, you can specify Read(N), but you cannot update. You can also UNLCK opcode to release the lock.
Also, each time you update, you need to lock it.
If you do ALCOBJ you can lock it exclusively. This will not even allow basic functions on the object like read/display. And vice versa too. Any *SHRRD locks like read/display will not allow exclusive lock.
| Is This Answer Correct ? | 2 Yes | 0 No |
3. Given the DOS Specification below and the following information: • Indicator 50 is off • No records have been written to the subfile What will be the result if the EXFMT operation code is performed on the record format CTLR? A R SUBFL A DESCRIP 101 6 1ODSPATR(UL) A DFT(’NOT FOUND’) A R CTLR SFLCTL(SUBFL) A N50 SFLDSP A SFLDSPCTL A SFLINZ A 67 SFIJEND A SFLSIZ(13) A SFLPAG(12) A ACCOUNTNO 100 S 10 a.) Only AccountNo will display b.) SUBFL will be initialized with 13 blank records c.) An I/O exception error will occur d.) The screen will display 12 records with ‘NOT FOUND’
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