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i would like to know under what circumstance the object
will get locked on AS400.
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Answer Posted / 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.
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