Ryan, ----- Original Message ----- From: "rcandersonmn" <[EMAIL PROTECTED]> Newsgroups: mailing.database.mysql Sent: Thursday, October 31, 2002 4:23 PM Subject: Prepared Statement Problem
> I'm new to MySQL and am having problems with Prepared Statements in > MySQL. I'm using the latest MySQL beta version, Innodb, and the latest > JDBC driver. Here is what I'm trying to do: > > > Connection con = x.getConnection(); /* gets the connection > > PreparedStatement ps = con.prepareStatement(sql); /* set up prepared > statement > > x.bindExampleWhere(ps, example); /* sets the preparedstatement's > variables > > ResultSet rs=ps.executeQuery(); > > > The SQL is: > select * from Vendor > where (Vendor.agreement_id = ?) > > The BindExample will produce: > (1,'1001') > > > The result set is always empty. When I run the query directly, I get > the expected result. you should add the line log to the [mysqld] section of my.cnf and restart mysqld. That way you get the General query log file 'hostname'.log to the datadir of MySQL. From it you see what the server actually received from the client. If you are running with SET AUTOCOMMIT = 0 and inserted the row during the current read transaction, then it might also be that you are reading too old a snapshot. The transaction doing the SELECT can issue a COMMIT to refresh the snapshot. As a sidenote, I just 2 hours ago updated http://www.innodb.com/ibman.html#InnoDB_transaction_model to reflect the new isolation level READ COMMITTED in 4.0.5. That level more closely emulates Oracle, and every consistent read always opens a new snapshot. No need to COMMIT any more to get a fresh snapshot if you do SET [SESSION | GLOBAL] TRANSACTION ISOLATION LEVEL READ COMMITTED READ COMMITTED will thus help in porting applications from Oracle to MySQL. > This code worked when going against an Oracle Database. > > Any advice would be appreciated. > > -Ryan Best regards, Heikki Tuuri Innobase Oy --- InnoDB - transactions, hot backup, and foreign key support for MySQL See http://www.innodb.com, download MySQL-Max from http://www.mysql.com sql query --------------------------------------------------------------------- Before posting, please check: http://www.mysql.com/manual.php (the manual) http://lists.mysql.com/ (the list archive) To request this thread, e-mail <[EMAIL PROTECTED]> To unsubscribe, e-mail <[EMAIL PROTECTED]> Trouble unsubscribing? Try: http://lists.mysql.com/php/unsubscribe.php
