On Sun, Jan 8, 2012 at 7:13 PM, 邓尧 <torshie@gmail.com> wrote:
> I have enabled the autocommit feature of psycopg2, and removed all the
> transactions in source code, also changed the sql statement to the
> following:
>
> insert into ACCOUNT(HOME)
> select "v1" as HOME
> where not exists (select 1 from ACCOUNT where HOME = "v1")
>
> Surprisingly, I still got the unique constraint violation error, but much
> fewer than before ( only 3 during the last 3 days).
> Any suggestions? Could it be a bug in psycopg2 or postgresql?
Presumably, you need to add a distinct.
insert into ... select DISTINCT .... where not exists.
--
Jon
