Re: Nested transactions

On Thu, 2004-06-17 at 02:44, Alvaro Herrera wrote:
> I don't know what Oracle or other DBMSs expect in this area.  Anyone
> care to give me a few pointers?  If I'm missing something, I want to
> know as soon as possible.

Without ignoring your other responses, I remain massively impressed....

SAVEPOINTs allow you to split a transaction into multiple related parts.

You can issue:
(implicit start)
statement1
statement2
statement3 - causes error - note does not rollback txn
reissue statement3
SAVEPOINT X
statement 4 - succeeds
ROLLBACK to X (undoes statement 4, but not statement 3)
statement 5
COMMIT

statements 1,2,3,5 are committed


Best Regards, Simon Riggs