Centuries ago, Nostradamus foresaw when Pradeepkumar.Pyatalo@honeywell.com ("Pradeepkumar, Pyatalo (IE10)") would
write:
> Could anyone help me out with this.
May I suggest doing a slightly different "interlock"?
mobile% echo $$
65425
--> At the start of your update process, determine your process's
PID. Let's suppose it's 65425.
--> First query:
update ebihistory set flag = 65425 where flag = 0
That claims all records with flag = 0 for the local process.
--> Then, to process them...
select [whatever] from pointtable p, ebihistory e
where p.pointid = e.pointnumber and e.flag = 65425;
--> Then, once they're done
update ebihistory set flag = 1 where flag = 65425
If there is some possibility of processes failing, you might want to
make sure that there's no update process running, and then run the
query:
update ebihistory set flag = 0 where flag > 1;
That draws back to 0 [unclaimed] any entries that haven't had
processing finished yet.
--
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