On 19 Sep 2011, at 2:57, Anibal David Acosta wrote:
> Hi everyone.
>
> I have a table with a PK, this table has a lot of insert per second (100 ~ 150 insert /sec)
> Sometimes, a get a duplicate key error, but ID is generated from a function (VOLATILE). This function has just one line (select nextval('XXX'))
>
> Is possible that this function return same ID for two diff call?
>
> Postgres version is 9.0
>
> Thanks!
Very unlikely.
Are you certain that you're not just hitting pre-existing rows that have ID's higher than the starting ID of your sequence? Or that there isn't another process inserting rows without using the sequence?
Alban Hertroys
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