Обсуждение: Minor question

Hello all,

   If I perform an update on a table which doesn't contain any rows to
update, should I perform a rollback? I realize that the transaction is
lost when the connection is closed, but is it technically correct to do so?

   I have this (psudo code):

-------------------------
UPDATE sessions SET last_access=current_time WHERE id='foo'

if crsr.rowcount == 1:
   conn.commit()
else
   # No entries found
   conn.rollback()
-------------------------

--
Kind regards,
Jan Danielsson

I don't believe it would make any difference... NOT doing the rollback would maybe save a couple of CPU cycles, but unless you're trying to squeeze EVERY, LAST cycle out of your CPU, I wouldn't bother...

What's the underlying reason you're asking?

Cheers,
~p

On Fri, 2007-03-09 at 11:03 +0100, Jan Danielsson wrote:

Hello all,

   If I perform an update on a table which doesn't contain any rows to
update, should I perform a rollback? I realize that the transaction is
lost when the connection is closed, but is it technically correct to do so?

   I have this (psudo code):

-------------------------
UPDATE sessions SET last_access=current_time WHERE id='foo'

if crsr.rowcount == 1:
   conn.commit()
else
   # No entries found
   conn.rollback()
-------------------------

Phillip Smith IT Coordinator Weatherbeeta P/L 8 Moncrief Rd Nunawading, Vic, 3131 AUSTRALIA P. +613 9845 0600 F. +613 9845 0655 E. phillip.smith@weatherbeeta.com.au