Read data From XML

Question

hi
I am new to XML.I want to read data from XML input ....For test purpose i have writte following
procedure , but when i print output value it shows ...NO ROWS SELECTED
Actually i want to read [ trd_relate ] value from following XML Input
'<ROOT><TRD trd_relate = "somevalue" trd_mainid = "152" trd_rate = "0.0000"/></ROOT>'
plese help me to solve this problem.
Thanks
create or replace procedure xml_test1(p_xml clob,rc1 in out mypkg.rc)
as
aaa xmltype;
begin
aaa :=xmltype(p_xml);
open rc1 for
SELECT extractValue(aaa, '/ROOT/TRD/trd_mainid') SOME_NAME
FROM table(XMLSequence(extract(aaa, '/ROOT/TRD/trd_mainid'))) ResultSet;
end xml_test1;
var a refcursor;
exec xml_test1('<ROOT><TRD trd_relate = "" trd_mainid = "152" trd_rate = "0.0000"/></ROOT>',:a);
print a;
**************************************

Answer 1

Hi,
try this:
1 create or replace function test(xml xmltype, qry varchar2) return varchar2 is
2 xx varchar2(100);
3 begin
4 select extractValue(xml, qry)
5 into xx
6 from dual;
7 return xx;
8* end;
SQL> /
Function created.
SQL> variable out varchar2(100)
SQL> exec :out := test(xmltype('<ROOT><TRD trd_relate = "somevalue" trd_mainid = "152" trd_rate = "0.0000"/></ROOT>'), '/ROOT/TRD/@trd_relate');
SQL> print out
OUT
somevalue
Bartek