[MonetDB-users] Transaction management in stored procedures

Hi all, Does anyone knows how can I handle transactions in a stored procedure? In procedure definition on SQL Reference says that a procedure_statement may consists of transaction_statement etc. How transaction_statement implemented in a stored procedure? I tried (inside the BEGIN ... END block of stored procedure) the: START TRANSACTION; sql statements COMMIT; and: sql statements COMMIT; but both they do not work. Thanks, Vassilis