Problem in XPath query with namespace

Question

Hi All,
Please help me on this topic.I given xml document which i have inserted into Oracle XML DB 10g R2 without registering xml schema.
I am listing out my problem here.
1. I need to get the value of cost element.If i have parent node duplicate
<?xml version="1.0" ?>
<customers xmlns="http://localhost/openuri.org" >
<customer xmlns="http://orcl.com">
<order>
<ordername>Computer</ordername>
<cost>35785638</cost>
</order>
<order>
<ordername>Computer</ordername>
<cost>35785638</cost>
</order>
</customer>
</customers>
2. The leaf node has namespace in it.How do i write query for second cost element.
<?xml version="1.0" ?>
<customers xmlns="http://localhost/openuri.org" >
<customer xmlns="http://orcl.com">
<order>
<ordername>Computer</ordername>
<cost>35785638</cost>
</order>
<order>
<ordername>Computer</ordername>
<cost xmlns="http://oracle.xdb.com">35785638</cost></order>
</customer>
</customers>
Thanks in Advance,
James

Answer 1

set long 100000
var xmltext clob
begin
:xmltext:=
'<?xml version="1.0" ?>
<customers xmlns="http://localhost/openuri.org" >
     <customer xmlns="http://orcl.com">
          <order>
               <ordername>Computer</ordername>
               <cost>35785638</cost>
          </order>
          <order>
               <ordername>Computer</ordername>
               <cost>35785638</cost>
          </order>
     </customer>
</customers>';
end;
select rownum as "NUM"
,      extractvalue(value(v),'/*') as "VALUE"
from   table(xmlsequence(extract(xmltype(:xmltext),'//customer/order/cost','xmlns="http://orcl.com"'))) v
SQL> r
  1  select rownum as "NUM"
  2  ,      extractvalue(value(v),'/*') as "VALUE"
  3  from   table(xmlsequence(extract(xmltype(:xmltext),'//customer/order/cost','xmlns="http://orcl.com"'))) v
  4*
       NUM VALUE
         1 35785638
         2 35785638
begin
:xmltext:=
'<?xml version="1.0" ?>
<customers xmlns="http://localhost/openuri.org" >
     <customer xmlns="http://orcl.com">
          <order>
               <ordername>Computer</ordername>
               <cost>35785638</cost>
          </order>
          <order>
               <ordername>Computer</ordername>
               <cost xmlns="http://oracle.xdb.com">35785638</cost></order>
     </customer>
</customers>';
end;
select extractvalue(xmltype(:xmltext),'//cost','xmlns="http://oracle.xdb.com"')
from dual;
SQL> r
  1  select extractvalue(xmltype(:xmltext),'//cost','xmlns="http://oracle.xdb.com"')
  2* from dual
EXTRACTVALUE(XMLTYPE(:XMLTEXT),'//COST','XMLNS="HTTP://ORACLE.XDB.COM"')
35785638
select *
from table(xmlsequence(extract(xmltype(:xmltext),'//cost','xmlns="http://oracle.xdb.com"')))
SQL> r
  1  select *
  2  from table(xmlsequence(extract(xmltype(:xmltext),'//cost','xmlns="http://oracle.xdb.com"')))
  3*
COLUMN_VALUE
<cost xmlns="http://oracle.xdb.com">35785638</cost>
select extractvalue(value(v),'/*')  "VALUE"
from table(xmlsequence(extract(xmltype(:xmltext),'//cost','xmlns="http://oracle.xdb.com"'))) v
SQL> r
  1  select extractvalue(value(v),'/*')  "VALUE"
  2  from table(xmlsequence(extract(xmltype(:xmltext),'//cost','xmlns="http://oracle.xdb.com"'))) v
  3*
VALUE
35785638
select *
from table(xmlsequence(extract(xmltype(:xmltext),'//customer/order','xmlns="http://orcl.com"')))
SQL> r
  1  select *
  2  from table(xmlsequence(extract(xmltype(:xmltext),'//customer/order','xmlns="http://orcl.com"')))
  3*
COLUMN_VALUE
<order xmlns="http://orcl.com">
  <ordername>Computer</ordername>
  <cost>35785638</cost>
</order>
<order xmlns="http://orcl.com">
  <ordername>Computer</ordername>
  <cost xmlns="http://oracle.xdb.com">35785638</cost>
</order>