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There is always a possibility. But the chance of it happen is very low since each thread processes a different customer. My other option is to put a Physical file that is key by RRN and chain back to it by RRN and perform update on it. But this method also has it's own ugly problem. If it is a brand new program, it wouldn't be so bad. But it is an existing process and it is quite a massive process to deal with. If you have dealt with Billing or Invoicing process before, you probably knows that this type of process is not of those that you want to make a mistake on.





"Brian Johnson" wrote in message news:mailman.598.1330709340.14575.rpg400-l@xxxxxxxxxxxx...

Is it guaranteed that READP followed by READ will get you back to your
original record in all cases? I'm thinking of concurrent updates or
inserts that that place a different record after the record read by
READP. You have concurrent updates; are other billing threads
performing inserts? What about other non-billing processes that may
be updating the table in question?



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