Re: Need to find the no. of connections for a database

W dniu 2020-02-27 o 14:37, sivapostgres@yahoo.com pisze:
> Hello,
>
> I'm saying isolation will not work out to my requirement.   The steps.
>
> 1.  On completion of all entries by all,  say for a day.
> 2.  Lock, so that no one enters any other data.
> 3.  Create a report from the entered data.
> 4.  Create / Modify required entries from the values arrived in the report. [ long process ]
> 5.  Once completed, commit all data.
> 6.  Unlock, so that other users can enter data again.  Data entered will be for another date.  
> Data cannot [should] not entered for the processed date.
>
so wouldn't pg_advisory_lock() in step 2, and pg_advisory_unlock() in step 6, make the process work 
in the way you expect?

https://www.postgresql.org/docs/current/functions-admin.html#FUNCTIONS-ADVISORY-LOCKS

>
>
> On Thursday, 27 February, 2020, 06:29:00 pm IST, Ireneusz Pluta/wp.pl <ipluta@wp.pl> wrote:
>
>
> W dniu 2020-02-27 o 12:35, sivapostgres@yahoo.com <mailto:sivapostgres@yahoo.com> pisze:
>
> > I need to prevent other users from entering any transaction till I finish taking reports from my
> > application.  All users will be using the same application, from which this report is supposed to
> > be printed.
>
> >
> maybe advisory lock is what you need?
>
> https://www.postgresql.org/docs/current/explicit-locking.html#ADVISORY-LOCKS
>
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