Re: Help with concurrent insertions.

Centuries ago, Nostradamus foresaw when Pradeepkumar(dot)Pyatalo(at)honeywell(dot)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.
--
let name="cbbrowne" and tld="gmail.com" in name ^ "@" ^ tld;;
http://cbbrowne.com/info/internet.html
I am not a Church numeral!
I am a free variable!