Creates an SQL statement (possibly using some specific extensions of the DBMS) corresponding to the
Note that the returned string may actually contain more than one SQL statement.
This function's purpose is mainly informative to get the actual SQL code which would be executed to perform the operation; to actually perform the operation, use perform_operation.
a ServerProvider object
a Connection object which will be used to render the action, or
a ServerOperation object
a new string, or