> Yes. _Everything_ is in a transaction in PostgreSQL. If you don't
> explicitly do BEGIN. . .COMMIT, then the system does it implicitly
> for each statement.
>
>> if yes each time my trigger select a data
>> and update then the value returned by the read are the value before the
>> transaction. It's true ? if yes my question are : also in the same
>> transaction (like my trigger) ?
>>
>
> Your trigger function runs inside the transaction of the calling
> statement, unless you have explicitly started a transaction.
>
Not possible from a trigger
> I'm starting to get the impression you have a misunderstanding of how
> PostgreSQL works. I think you maybe need to spend some more time
> with the manual. If you find the English version puzzling, you can
> also work in French (at http://docs.postgresqlfr.org/) or German (I
> see a translation at
> http://www.postgresql.org/docs/books/pghandbuch.html.de; I dunno if
> there's a more recent one). Sorry, AFAIK there isn't one in Dutch.
>
Yes true, It's my first step with postgres but also with a relationnal
database.
But I'm sure that with COPY the data are not correctly updated and
if I edit the file loaded by the COPY command and adapt it with each
line with a command INSERT all work fine.
Guy