Connections to Sybase IQ can be made through the TDS protocol (Open Client and jConnect JDBC connections) or through the IQ protocol (ODBC, Embedded SQL).
If you have users who use both TDS and the Sybase IQ-specific protocol, you can configure their initial settings using stored procedures. As it is shipped, Sybase IQ uses this method to set Open Client connections and jConnect connections to reflect default Adaptive Server Enterprise behavior.
The initial settings are controlled using the LOGIN_PROCEDURE option. This option names a stored procedure to run when users connect. The default setting is to use the sp_iq_process_login system stored procedure, which checks whether the user is permitted to log in, and then calls the sp_login_environment system procedure. If you wish to change this behavior you can do so.
In its turn, sp_login_environment checks to see if the connection is being made over TDS. If it is, it calls the sp_tsql_environment procedure, which sets several options to new “default” values for the current connection.
For more information, see “LOGIN_PROCEDURE option”, or the sp_iq_process_login, sp_login_environment, and sp_tsql_environment system procedures in Chapter 9, “System Procedures”.
