Re: two concurrency questions

On Mon, 2003-03-03 at 21:20, Jeff Patterson wrote:
> 1: Are user defined functions (eg pgplsql) atomic? I.e. if my function
> updates a bunch of rows and one update fails for one reason or another
> does it automatically roll-back to the state before the function was called?
>
> 2: If an update causes a trigger and the trigger updates a row and the
> trigger fails, what happens? Is there a way to atomize the whole process?

Both operations occur inside a transaction (if you don't explicitly
start a transaction, PostgreSQL does it for you), so they should both be
atomic: when an error occurs, the current transaction is aborted.

Cheers,

Neil
--
Neil Conway <neilc(at)samurai(dot)com> || PGP Key ID: DB3C29FC