DatabaseMetaData weak implementation

I cannot get DatabaseMetaData.getIndexInfo to return anything. I tried
several versions of the JDBC driver... I currently use the one installed by
Cygwin, the classes are dated 1/16/2002 2:29pm

I also need to retrieve constraints information using
DatabaseMetaData.getImportedKeys, but no luck here either... this function
just returns null...

Is there a new (improved) JDBC driver out there?

Thanks,

    Benoit