XQUERY against an XMLTYPE variable

Question

I have a procedure which gets xmltype instance and i have to use xquery upon that variable.
declare
myxml xmltype;
s varchar2(20);
begin
myxml:=xmltype('<person><name id="1" age="23"/><name id="2" age="25"/></person>');
SELECT
XMLQuery(
'for $i in /person
where $i/age > 24
return $i/id'
PASSING myxml RETURNING CONTENT) into s
FROM DUAL;
end;
BUT i get this error
ORA-06550: line 6, column 1:
PLS-00801: internal error [*** ASSERT at file pdw4.c, line  793; Cannot coerce
between type 43 and type 30; anon_68F441E0__AB[6, 1]]
Please help it is urgent

Answer 1

Not sure if you ever received your answer regarding how to pass an XMLType variable in PLSQL to an XQuery command.
Here is an example of what I've been using... in Oracle 10.2.0.1
SET SERVEROUTPUT ON SIZE 200000
DECLARE
l_result XMLType;
l_xxDoc XMLType := XMLType(
<root>
<things>
<somestuff>12345</somestuff>
<morestuff>12345</morestuff>
</things>
<things>
<somestuff>dfgdfg</somestuff>
<morestuff>werwer</morestuff>
</things>
</root>
PROCEDURE printClobOut
(p_result IN CLOB)
IS
v_xmlstr VARCHAR2(32767);
v_line VARCHAR2(2000);
BEGIN
v_xmlstr := DBMS_LOB.SUBSTR(p_result,32767);
LOOP
EXIT WHEN v_xmlstr IS NULL;
v_line := SUBSTR(v_xmlstr,1,INSTR(v_xmlstr,CHR(10))-1);
DBMS_OUTPUT.PUT_LINE('| '||v_line);
v_xmlstr := SUBSTR(v_xmlstr,INSTR(v_xmlstr,CHR(10))+1);
END LOOP;
END;
BEGIN
select XMLQUERY(
'for $a in $TheDoc/root
return <theresult>
{$a/things}
</theresult>
PASSING l_xxDoc as "TheDoc"
RETURNING CONTENT) into l_result
from dual;
printClobOut(l_result.extract('/').getClobVal());
END;
Kevin