is this expected XMLTYPE function behavior?

select XMLTYPE(X1) from tab;

ERROR:

ORA-06502: PL/SQL: numeric or value error
ORA-06512: at "SYS.XMLTYPE", line 248
ORA-06512: at line 1

X1 is basically a CLOB and has a null value.

I am on 10gr1

Thanks
Aakash Received on Fri May 19 2006 - 02:50:49 CDT