* Albe Laurenz:
> The original question asked was "how can I tell an error that is caused
> by incomplete isolation from another error?"
>
> If you have a code segment like
> SELECT COUNT(id) INTO i2 FROM a WHERE id = i;
> IF i2 = 0 THEN
> INSERT INTO a (id) VALUES (i);
> END IF;
>
> Then you can be certain that any "unique_violation" thrown here must
> be a serialization problem (if the only unique contraint is on "id").
I want to put this into a library, so I'd like something foolproof.
Right now, user code sets a flag which basically says that the wrapper
should retry the transaction a few times if a unique_violation is
detected, but I'd like to get rid of that because it's one thing less
the programmer needs to worry about.
--
Florian Weimer <fweimer@bfk.de>
BFK edv-consulting GmbH http://www.bfk.de/
Kriegsstraße 100 tel: +49-721-96201-1
D-76133 Karlsruhe fax: +49-721-96201-99
