Parameters with ? Not working in MySQL Connector Net 1.0.9 while with @ are working

[Peter de Bruine]

Hi all,

We have developed an application which uses the MySQL Connector Net to get
data from the database. Recently i upgraded to MySQL Connector Net 1.0.9 and
found that the application wasn't working anymore. We got error saying
"Parameter '?parametername' must be defined". Here a example:

MySqlCommand cmd = new MySqlCommand("SELECT something FROM sometable WHERE
id=?someid", conn);

cmd.Parameters.Add("someid", MySqlDbType.Int32).Value = someobject.Id;

MySqlDataAdapter da = new MySqlDataAdapter(cmd);			
DataSet ds = new DataSet("sometable");
da.Fill(ds, 0, 0, "sometable");

This code worked fine until 1.0.9. When we change the ? to @ the code works
again. Can anyone explain why this is? 

Kind regards

Peter de Bruine
p.debruine@stripped