Parsing XML with XMLTable n Oracle - sql

Question

I have one xml which holds customer and order details. I am parsing it using XMLTable. I think I am giving the correct XPath but I am getting no output.
Here is what I have tried. Hoping for assistance.
**DECLARE
l_raw_xml CLOB:= '<?xml version="1.0" encoding="utf-8"?>
<Root
xmlns="http://www.adventure-works.com">
<Customers>
<Customer CustomerID="GREAL">
<CompanyName>Great Lakes Food Market</CompanyName>
<ContactName>Howard Snyder</ContactName>
<ContactTitle>Marketing Manager</ContactTitle>
<Phone>[phone]</Phone>
<FullAddress>
<Address>2732 Baker Blvd.</Address>
<City>Eugene</City>
<Region>OR</Region>
<PostalCode>97403</PostalCode>
<Country>USA</Country>
</FullAddress>
</Customer>
</Customers>
<Orders>
<Order>
<CustomerID>LETSS</CustomerID>
<EmployeeID>6</EmployeeID>
<OrderDate>1997-11-10T00:00:00</OrderDate>
<RequiredDate>1997-12-08T00:00:00</RequiredDate>
<ShipInfo ShippedDate="1997-11-21T00:00:00">
<ShipVia>2</ShipVia>
<Freight>45.97</Freight>
<ShipName>Let Stop N Shop</ShipName>
<ShipAddress>87 Polk St. Suite 5</ShipAddress>
<ShipCity>San Francisco</ShipCity>
<ShipRegion>CA</ShipRegion>
<ShipPostalCode>94117</ShipPostalCode>
<ShipCountry>USA</ShipCountry>
</ShipInfo>
</Order>
</Orders>
</Root>';
l_xml_type XMLTYPE:=XMLTYPE.createXML(l_raw_xml);
cursor c_make_xml_object
is
SELECT x.*,
y.*
FROM XMLTABLE('/Root/Customers/Customer'
PASSING l_xml_type
COLUMNS
CustomerID VARCHAR2(255) PATH '#CustomerID',
CompanyName VARCHAR2(255) PATH 'CompanyName',
FullAddress XMLTYPE PATH 'FullAddress') x,
XMLTABLE('/FullAddress'
PASSING x.FullAddress
COLUMNS
Address VARCHAR2(255) PATH 'Address',
City VARCHAR2(255) PATH 'City') y ;
BEGIN
FOR rec IN c_make_xml_object
loop
DBMS_OUTPUT.PUT_LINE(rec.CustomerID);
DBMS_OUTPUT.PUT_LINE(rec.CompanyName);
END LOOP;
END;
/**
Do I have to account for the namespace? I had added namespace code but it did not work/

Answer 1

Change to this to include a default namespace:
FROM XMLTABLE(xmlnamespaces(default 'http://www.adventure-works.com'),
'/Root/Customers/Customer' ....
....
XMLTABLE(xmlnamespaces(default 'http://www.adventure-works.com'), '/FullAddress'
.....

Answer 2

Yes, a proper namespace definition is needed within the SQL query such as below :
SELECT x.*, y.*
FROM XML_TAB t,
XMLTABLE(XMLnamespaces('http://www.adventure-works.com' as "ns"),
'ns:Root/ns:Customers/ns:Customer'
PASSING t.xml_data
COLUMNS
CustomerID VARCHAR2(255) PATH '#CustomerID',
CompanyName VARCHAR2(255) PATH 'ns:CompanyName',
FullAddress XMLTYPE PATH 'ns:FullAddress'
) x,
XMLTABLE(XMLnamespaces('http://www.adventure-works.com' as "ns"),
'ns:FullAddress'
PASSING x.FullAddress
COLUMNS
Address VARCHAR2(255) PATH 'ns:Address',
City VARCHAR2(255) PATH 'ns:City') y ;
Demo with SQL
Demo with PL/SQL