Karel Zak wrote:
>  I agree with Peter. For example I have multi-encoding client program 
>  that changing client-encoding in the middle of transaction and this
>  change not depend on transaction. And the other thing: I have DB
>  driver in an program there is not possible do SQL query outsite
>  transaction.

No problem executing a SET inside its own transaction.  The rollback
happens only if the SET fails, which for a single SEt command, should be
fine.

> 
>  Is there some problem implement "SET ... ON ROLLBACK UNSET" ?

Seems kind of strange.  If anything, I can imagine a NO ROLLBACK
capability.  However, because this can be easily done by executing the
SET in its own transaction, it seems like overengineering.

-- 
  Bruce Momjian                        |  http://candle.pha.pa.us
  [EMAIL PROTECTED]               |  (610) 853-3000
  +  If your life is a hard drive,     |  830 Blythe Avenue
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