Re: deadlock detected when inserting data

On Mon, 2003-12-15 at 22:43, Jenny Zhang wrote:
> Another question is, I've read that "Each PL/pgSQL function is
> automatically treated as a single transaction
> by Postgres" at http://www.geocrawler.com/archives/3/6/2002/6/0/9050299/
> is it still true?  Even though the shopping_cart function calls A and A
> has BEGIN and COMMIT in it, pgsql won't commit till all the shopping_cart is done?

It is true.  If no transaction is already in progress, each statement is
a transaction in itself (or begins a transaction if autocommit is off).
Therefore any function must necessarily execute inside a transaction.

You cannot use BEGIN in a PL/pgSQL function to begin a transaction,
since a transaction is already in progress.  In PL/pgSQL, BEGIN marks
the start of the executed code (and follows any declarations).

--
Oliver Elphick                                Oliver.Elphick@lfix.co.uk
Isle of Wight, UK                             http://www.lfix.co.uk/oliver
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