Joshua Tolley escribió:
> Have you tried this? I expect if you give it a shot, you'll find you don't
> actually have this problem. Really, everything is always in a transaction. If
> you haven't explicitly opened one, PostgreSQL opens one for you before each
> statement, and issues a COMMIT afterwards (or a ROLLBACK, if your statement
> ran into an error). Statements within functions are always executed within the
> same transaction, so you can issue SAVEPOINT commands anywhere in PL/pgSQL
> functions without problems, because you're always in a transaction.
No, actually you can't call SAVEPOINT inside a PL/pgSQL function (or any
SPI user for that matter -- have you tried savepoints in LOLCODE?)
Inside PL/pgSQL the only way to use savepoints is with EXCEPTION blocks.
You are correct that you're always in a transaction, but in this context
not all transactions are equal :-(
(The problem, as we found out, is that the function must always have
control at the same level of transaction nestedness in SPI; you can't
just let the user define and release savepoints arbitrarily.)
--
Alvaro Herrera http://www.CommandPrompt.com/
The PostgreSQL Company - Command Prompt, Inc.
