Quote from java5 API: "The constant in the Java programming language, sometimes referred to as a type code, that identifies the generic SQL type NULL."
This actually returns 0. This has been extremely misleading and has caused endless headaches.
I have no clue why in the hell they made it return an int when even SQL itself accepts INTS and does not view them as NULL.
Which ever goofball wrote that probably din't have much understanding of SQL, or if he/she did could have done a much better job at phrasing it.
In other databases, this will fly but run it against a large scale app. with Postgres as the backend, because postgres handles foreign-key constraints (which is obviously a good thing to make up for goof ball documentation such as the above), I garrauntee you it will be a night-mare to work with or use.
My advice, just don't use it (to Sun, please eliminate it all together coz its very misleading)...
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