SQL Query to fetch a specific field in xml

Question

Hi,
Below is my sample Xml file.
<?xml version = "1.0" encoding = "UTF-8"?>
<methodCall xmlns = "http://www.tibco.com/schemas/CS4_new1/Schema.xsd" xmlns:xsi = "http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation = "http://www.tibco.com/schemas/CS4_new1/Schema.xsd Schema_new.xsd">
<methodName>rBatchFile </methodName>
<params>
<param>
<value>
<struct>
<member>
<name>filename</name>
     <value>
     D:\test.txt
     </value>
</member>
<member>
<name>batchId</name>
<value>
     L1
</value>
</member>
</struct>
</value>
</param>
</methodName>
</methodCall>
I want to query a "value" field based on the "name" field. I tried with the following query which didnt work.
SELECT a.extract('//value/text()' , 'xmlns:="http://www.tibco.com/schemas/CS4_new1/Schema.xsd" ')
FROM ( SELECT t.customerinfo.extract('//member[name="filename"]','xmlns:="http://www.tibco.com/schemas/CS4_new1/Schema.xsd" ')
FROM cust_order t ) a;
Please do provide the SQL query ASAP.

Answer 1

with tab as (
select xmltype('<?xml version = "1.0" encoding = "UTF-8"?>
<methodCall xmlns = "http://www.tibco.com/schemas/CS4_new1/Schema.xsd" xmlns:xsi = "http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation = "http://www.tibco.com/schemas/CS4_new1/Schema.xsd Schema_new.xsd">
<methodName>rBatchFile </methodName><params>
<param>
<value>
<struct>
<member>
<name>filename</name>
<value>
D:\test.txt
</value>
</member>
<member>
<name>batchId</name>
<value>
L1
</value>
</member>
</struct>
</value>
</param>
</params>
</methodCall>
') a from dual
--end of sample data
SELECT
  extractvalue(column_value,'/member/name') name,
  extractvalue(column_value,'/member/value') value
from tab t,xmltable('xmlns = "http://www.tibco.com/schemas/CS4_new1/Schema.xsd" xmlns:xsi = "http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation = "http://www.tibco.com/schemas/CS4_new1/Schema.xsd Schema_new.xsd"','for $i in //member return $i' passing t.a)An example...but i tweaked the xml...check the xml namespace once before executing...
without adding the namespaces...code will be like...
with tab as (
select xmltype('<?xml version = "1.0" encoding = "UTF-8"?>
<methodCall >
<methodName>rBatchFile </methodName><params>
<param>
<value>
<struct>
<member>
<name>filename</name>
<value>
D:\test.txt
</value>
</member>
<member>
<name>batchId</name>
<value>
L1
</value>
</member>
</struct>
</value>
</param>
</params>
</methodCall>
') a from dual
--end of sample data
SELECT
  extractvalue(column_value,'/member/name') name,
  extractvalue(column_value,'/member/value') value
from tab t,xmltable('for $i in //member return $i' passing t.a)Ravi Kumar