Unstructured Xml Storage with Namespaces - Problem in DML Queries

Question

Hai All,
I worked with xml namespace with registering schema in db and referred in my xml document.It worked fine.
But i want to work in unstructured xml document with namespaces, to do all dml queries like, select,update,delete using Xpath to xmltype.
I could insert the records,When i try to select some element from xmltype field using Xptah from db,it does not bring any thing like element value or any error.It just displaying as empty value.I am using oracle 10g R2.
Please help me how to select the element value from xmltype using XPath or whatever it is.
Please help me out from this to follow
Advance Thanks,
P.Savananan

Answer 1

SQL> create user marco identified by marco account unlock;
User created.
SQL> grant dba, xdbadmin to marco;
Grant succeeded.
SQL> conn marco/[email protected]
Connected.
SQL> create table xml_tab ( details xmltype);
Table created.
SQL> insert into xml_tab values(XMLTYPE('<?xml version="1.0" ?>
  2  <customers xmlns="http://localhost/openuri.org" >
  3  <customer>
  4  <order xmlns="http://orcl.com" >
  5  <ordername>Computer</ordername>
  6  <cost>35785638</cost>
  7  </order>
  8  </customer>
  9  </customers>'));
1 row created.
SQL> commit;
Commit complete.
SQL> select extractValue(details,'/customers/customer/order/ordername') from xml_tab;
EXTRACTVALUE(DETAILS,'/CUSTOMERS/CUSTOMER/ORDER/ORDERNAME')
SQL> set long 10000
SQL> select * from xml_tab;
DETAILS
<?xml version="1.0"?>
<customers xmlns="http://localhost/openuri.org">
  <customer>
    <order xmlns="http://orcl.com">
      <ordername>Computer</ordername>
      <cost>35785638</cost>
    </order>
  </customer>
</customers>
SQL> select extract(details,'//order/ordername') XDATA
  2  from   xml_tab
  3  ;
XDATA
SQL> select extract(details,'//order/ordername','xmlns="http://orcl.com"') XDATA
  2  from   xml_tab
  3  ;
XDATA
<ordername xmlns="http://orcl.com">Computer</ordername>
SQL> select extractValue(details,'//order/ordername','xmlns="http://orcl.com"') XDATA
  2  from   xml_tab
  3  ;
XDATA
Computer
SQL> select extractValue(details,'/*/*/order/ordername','xmlns="http://orcl.com"') XDATA
  2  from   xml_tab
  3  ;
XDATA
Computer