Symbian DBMS .. what damn does it supported?

I am going mad for Symbian DBMS and SQL supported features … what is supported what not? My experience right now:

SELECT C1 FROM T1 WHERE C2=0

Not supported: C2 must be in the set of column selected

SELECT C1, C2 FROM T1 WHERE C1=C2

Not supported: C1 = C2 clause is not accepted (!!!)

…. what kind of story are you telling me?

Supported Symbian SQL Subset .. and no, no update for Symbian OS 9.1 .