XMLTable query returns no result - sql

Question

I'm only passingly familiar with XML. I need to parse a response from a SOAP request. From a lot of searching, I've developed the following query to try to extract the status. Ultimately, I'd like to get the status, cntr and cntr_status fields from the response. My query gives no error, but also no results. What noob error am I making?
SELECT *
FROM XMLTABLE (
XMLNAMESPACES('http://schemas.xmlsoap.org/soap/envelope/' as "soapenv",
'http://www.w3.org/2001/XMLSchema' as "xsd",
'http://www.w3.org/2001/XMLSchema-instance' as "xsi",
'http://service.xxx.com/' AS "xxx"),
'/soapenv:Envelope/soapenv:Body/xxx:sendDataResponse/xxx:sendDataReturn/xxx:result'
PASSING XMLTYPE('<?xml version="1.0" encoding="UTF-8"?>' ||
'<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" ' ||
' xmlns:xsd="http://www.w3.org/2001/XMLSchema" ' ||
' xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">' ||
' <soapenv:Body>' ||
' <sendDataResponse xmlns="http://service.xxx.com">' ||
' <sendDataReturn>' ||
' <result>' ||
' <build>Build 1</build>' ||
' <status>SUCCESS</status>' ||
' <cntr_statuses>' ||
' <cntr_result>' ||
' <cntr>1234567890A</cntr><cntr_status>SUCCESS</cntr_status>' ||
' </cntr_result>' ||
' <cntr_result>' ||
' <cntr>1234567890B</cntr><cntr_status>SUCCESS</cntr_status>' ||
' </cntr_result>' ||
' </cntr_statuses>' ||
' </result>' ||
' </sendDataReturn>' ||
' </sendDataResponse>' ||
' </soapenv:Body>' ||
'</soapenv:Envelope>')
COLUMNS status VARCHAR2(20) PATH 'xxx:status') xmlstuff ;
A sample response from the service is hard-coded into the XMLTYPE function.
I've tried any number of query strings and column paths involving the xxx namespace, all yielding no results.
There could be hundreds of cntr and cntr_status pairs.
Thanks for looking!

Answer 1

Using the DEFAULT namespace (since you don't define a prefix for http://service.xxx.com) and removing the references to xxx: appears to work:
SELECT *
FROM XMLTABLE (
XMLNAMESPACES(
'http://schemas.xmlsoap.org/soap/envelope/' as "soapenv",
'http://www.w3.org/2001/XMLSchema' as "xsd",
'http://www.w3.org/2001/XMLSchema-instance' as "xsi",
DEFAULT 'http://service.xxx.com'
),
'/soapenv:Envelope/soapenv:Body/sendDataResponse/sendDataReturn/result'
PASSING XMLTYPE(
'<?xml version="1.0" encoding="UTF-8"?>' ||
'<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" ' ||
' xmlns:xsd="http://www.w3.org/2001/XMLSchema" ' ||
' xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">' ||
' <soapenv:Body>' ||
' <sendDataResponse xmlns="http://service.xxx.com">' ||
' <sendDataReturn>' ||
' <result>' ||
' <build>Build 1</build>' ||
' <status>SUCCESS</status>' ||
' <cntr_statuses>' ||
' <cntr_result>' ||
' <cntr>1234567890A</cntr><cntr_status>SUCCESS</cntr_status>' ||
' <cntr>1234567890B</cntr><cntr_status>SUCCESS</cntr_status>' ||
' </cntr_result>' ||
' </cntr_statuses>' ||
' </result>' ||
' </sendDataReturn>' ||
' </sendDataResponse>' ||
' </soapenv:Body>' ||
'</soapenv:Envelope>'
)
sqlfiddle here
Then to get the first cntr and cntr_status:
SELECT *
FROM XMLTABLE (
XMLNAMESPACES(
'http://schemas.xmlsoap.org/soap/envelope/' as "soapenv",
'http://www.w3.org/2001/XMLSchema' as "xsd",
'http://www.w3.org/2001/XMLSchema-instance' as "xsi",
DEFAULT 'http://service.xxx.com'
),
'/soapenv:Envelope/soapenv:Body/sendDataResponse/sendDataReturn/result'
PASSING XMLTYPE(
'<?xml version="1.0" encoding="UTF-8"?>' ||
'<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" ' ||
' xmlns:xsd="http://www.w3.org/2001/XMLSchema" ' ||
' xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">' ||
' <soapenv:Body>' ||
' <sendDataResponse xmlns="http://service.xxx.com">' ||
' <sendDataReturn>' ||
' <result>' ||
' <build>Build 1</build>' ||
' <status>SUCCESS</status>' ||
' <cntr_statuses>' ||
' <cntr_result>' ||
' <cntr>1234567890A</cntr><cntr_status>SUCCESS</cntr_status>' ||
' <cntr>1234567890B</cntr><cntr_status>SUCCESS</cntr_status>' ||
' </cntr_result>' ||
' </cntr_statuses>' ||
' </result>' ||
' </sendDataReturn>' ||
' </sendDataResponse>' ||
' </soapenv:Body>' ||
'</soapenv:Envelope>'
)
COLUMNS
status VARCHAR2(20) PATH 'status',
cntr VARCHAR2(20) PATH 'cntr_statuses/cntr_result/cntr[1]',
cntr_status VARCHAR2(20) PATH 'cntr_statuses/cntr_result/cntr_status[1]'
) xmlstuff;
sqlfiddle here
Update for revised XML format
Ideally, you should be able to use the XPATH '/soapenv:Envelope/soapenv:Body/sendDataResponse/sendDataReturn/result/cntr_status/cntr_result' in the XMLTABLE and then get the status with the path ./../../status; however, I keep getting null values when trying to traverse to a parent element and couldn't find a working solution.
SELECT x.*
FROM table_name t
CROSS JOIN
XMLTABLE(
XMLNAMESPACES(
'http://schemas.xmlsoap.org/soap/envelope/' as "soapenv",
'http://www.w3.org/2001/XMLSchema' as "xsd",
'http://www.w3.org/2001/XMLSchema-instance' as "xsi",
DEFAULT 'http://service.xxx.com'
),
'/soapenv:Envelope/soapenv:Body/sendDataResponse/sendDataReturn/result/cntr_statuses/cntr_result'
PASSING XMLTYPE(t.xml)
COLUMNS
status VARCHAR2(20) PATH './../../status',
cntr VARCHAR2(20) PATH 'cntr',
cntr_status VARCHAR2(20) PATH 'cntr_status'
) x;
sqlfiddle here
According to this comment, it will work in Oracle 11.2.0.4 but if you try it in Oracle 11.2.0.2 then status will be NULL (which is the result seen on SQLFiddle).
Instead, with multiple cntr_result elements you can use two XMLTABLE:
SELECT x.status,
c.cntr,
c.cntr_status
FROM table_name t
CROSS JOIN
XMLTABLE(
XMLNAMESPACES(
'http://schemas.xmlsoap.org/soap/envelope/' as "soapenv",
'http://www.w3.org/2001/XMLSchema' as "xsd",
'http://www.w3.org/2001/XMLSchema-instance' as "xsi",
DEFAULT 'http://service.xxx.com'
),
'/soapenv:Envelope/soapenv:Body/sendDataResponse/sendDataReturn/result'
PASSING XMLTYPE(t.xml)
COLUMNS
status VARCHAR2(20) PATH 'status',
cntr_statuses XMLTYPE PATH 'cntr_statuses'
) x
CROSS JOIN
XMLTABLE(
XMLNAMESPACES(
'http://schemas.xmlsoap.org/soap/envelope/' as "soapenv",
'http://www.w3.org/2001/XMLSchema' as "xsd",
'http://www.w3.org/2001/XMLSchema-instance' as "xsi",
DEFAULT 'http://service.xxx.com'
),
'/cntr_statuses/cntr_result'
PASSING x.cntr_statuses
COLUMNS
cntr VARCHAR2(20) PATH 'cntr',
cntr_status VARCHAR2(20) PATH 'cntr_status'
) c;
Assuming your data is in the xml column of the table_name table.
Then the output is:
STATUS
CNTR
CNTR_STATUS
SUCCESS
1234567890A
SUCCESS
SUCCESS
1234567890B
SUCCESS
sqlfiddle here