Ok, this bug has been bugging me long enough.

What happens is that there's a dynamic let block that looks like this:

(eval `(let ((,param-var ',rem-params))
                          (sql-product-interactive ',sql-product 
',new-name))))

Here's the code that sets param-var:

(setq param-var
           (sql-get-product-feature sql-product :sqli-login nil t))

It uses global variable sql-product. The default sql-product is ansi and 
running the above for it results in nil. Running "(let ((nil ..." leads 
to this error. In the same function there is a block that sets it to a 
proper value based on the current connection, but it is executed after 
param-var is already set. That's why the second time works.


I've attached a simple patch that just reorders code within sql-connect.

-- 
Best Regards,
Nikolay Kudryavtsev