Mike Nolan <nolan@gw.tssi.com> writes:
>> Where do you get that impression? currval() refers to the last ID for the
>> session you are in. It's also FAQ question 4.15.3. Even better, if you
>> havn't used nextval() in your current session, currval() returns an error,
>> so you can't even get it wrong by accident.
> I stand corrected. I was doing some testing of a PHP module that is
> called from a web form a while back and got inconsistent results with
> currval, I probably had a script error of some kind.
If you are using persistent connections in PHP you have to be very
careful, because independent bits of PHP script may re-use the same
database connection, and thereby will see a common currval value.
After doing a nextval, you have to be sure to fetch currval before
releasing the connection back to the pool.
regards, tom lane
