OCI-21560 when using XMLElement

Question

Dear All,
I've just made my first step regarding to the XML field, but the following select caused me an error:
select XMLElement ("colors", color) from my_colors;
OCI-21560: argument 3 is null, invalid, or out of range
I was looking for answers on google and here, but I couldn't find anything usable.
One did tell me, that the reason of the error might be using Oracle version 9.2.0.4, so I patched it to 9.2.0.6, but the problem remained the same...
I do really hope that someone has the solution here and won't hesistate to share it with me! :-)
Thank You!
Franky

Answer 1

Franky,
First of all, show us if you can do a direct select. Like
select color from my_colors;
I was able to do this similar query though:
SQL> conn scott/tiger
Connected.
SQL> select empno from emp;
     EMPNO
      7369
      7499
      7521
      7566
      7654
      7698
      7782
      7788
      7839
      7844
      7876
     EMPNO
      7900
      7902
      7934
14 rows selected.
SQL> select xmlelement("EmpNo", empno) from emp;
XMLELEMENT("EMPNO",EMPNO)
<EmpNo>7369</EmpNo>
<EmpNo>7499</EmpNo>
<EmpNo>7521</EmpNo>
<EmpNo>7566</EmpNo>
<EmpNo>7654</EmpNo>
<EmpNo>7698</EmpNo>
<EmpNo>7782</EmpNo>
<EmpNo>7788</EmpNo>
<EmpNo>7839</EmpNo>
<EmpNo>7844</EmpNo>
<EmpNo>7876</EmpNo>
XMLELEMENT("EMPNO",EMPNO)
<EmpNo>7900</EmpNo>
<EmpNo>7902</EmpNo>
<EmpNo>7934</EmpNo>
14 rows selected.
PS.: Are "just" volunteers working here?YES.
Also , you might want to check out the XML DB Forum.
XML DB
Rahul.