Hello, I have try your POC in oracle 10.2.0 and its seems dosen't work. Do you have test it only in oracle 11 ? this what i do . I create on my db the user : usertest1 with password usertest1 then after alter session set nls_date_format='"'' and myfunc()=1--"'; or alter session set nls_date_format='"'' and 1=1--"'; select sysdate from dual; SYSDATE ------------------ 2008-07-19 Does this flow work only in oracle 11 ? Cheers Richard