Get values in XML nodes using SQL - sql

Question

I have an XML in SQL table column. I need to decode this xml and get value of particular nodes. Find my XML below
<?xml version="1.0" encoding="UTF-8"?>
<SOAP-ENV:Envelope
xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/">
<SOAP-ENV:Header/>
<SOAP-ENV:Body>
<ns:createTransactionResponse
xmlns:impl="http://office/work/services/service1"
xmlns:ns="http://www.regfrez.com/schemas/service1_V2/SharedResources/XMLSchema/Schema.xsd"
xmlns:tns="http://www.erdeftq.ae/Activematrix/ESB/service1/1_0">
<transactionResponse>
<transaction-info>
<registrationId>R1234</registrationId>
<trialId>T12345</trialId>
<transactionId>12345</transactionId>
<transactionDate>27-02-2020:08:47</transactionDate>
<status>Confirmed</status>
</transaction-info>
</transactionResponse>
</ns:createTransactionResponse>
</SOAP-ENV:Body>
</SOAP-ENV:Envelope>
I need the values of nodes: registrationId, transactionId and status and I tried this but couldn't succeed as i got empty value as result:
DECLARE #xml XML
SET #xml = 'XML here'
SELECT T.C.value('#status', 'nvarchar(100)') FROM #xml.nodes('createTransactionResponse/transactionResponse/transaction-info/status') T(C)
SELECT T.C.value('#trans', 'nvarchar(100)') FROM #xml.nodes('createTransactionResponse/transactionResponse/transaction-info/transactionId') T(C)
SELECT T.C.value('#id', 'nvarchar(100)') FROM #xml.nodes('createTransactionResponse/transactionResponse/transaction-info/registrationId') T(C)
Any help/correction would be appreciated

Answer 1

Your own attempt is ignoring the namespaces and does not specify the full XPath.
Try one of these approaches:
Your XML:
DECLARE #xml XML
SET #xml = '<SOAP-ENV:Envelope
xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/">
<SOAP-ENV:Header/>
<SOAP-ENV:Body>
<ns:createTransactionResponse
xmlns:impl="http://office/work/services/service1"
xmlns:ns="http://www.regfrez.com/schemas/service1_V2/SharedResources/XMLSchema/Schema.xsd"
xmlns:tns="http://www.erdeftq.ae/Activematrix/ESB/service1/1_0">
<transactionResponse>
<transaction-info>
<registrationId>R1234</registrationId>
<trialId>T12345</trialId>
<transactionId>12345</transactionId>
<transactionDate>27-02-2020:08:47</transactionDate>
<status>Confirmed</status>
</transaction-info>
</transactionResponse>
</ns:createTransactionResponse>
</SOAP-ENV:Body>
</SOAP-ENV:Envelope>';
--This is the most explicit (which is always a best way):
WITH XMLNAMESPACES('http://schemas.xmlsoap.org/soap/envelope/' AS n1
,'http://www.regfrez.com/schemas/service1_V2/SharedResources/XMLSchema/Schema.xsd' AS n2)
SELECT #xml.value('(/n1:Envelope/n1:Body/n2:createTransactionResponse/transactionResponse/transaction-info/registrationId/text())[1]','nvarchar(max)') AS RegistrationId
,#xml.value('(/n1:Envelope/n1:Body/n2:createTransactionResponse/transactionResponse/transaction-info/transactionId/text())[1]','nvarchar(max)') AS TransactionId
,#xml.value('(/n1:Envelope/n1:Body/n2:createTransactionResponse/transactionResponse/transaction-info/status/text())[1]','nvarchar(max)') AS [Status];
--This will avoid some repeated XPath, but .nodes() produces quite some overhead:
WITH XMLNAMESPACES('http://schemas.xmlsoap.org/soap/envelope/' AS n1
,'http://www.regfrez.com/schemas/service1_V2/SharedResources/XMLSchema/Schema.xsd' AS n2)
SELECT ti.value('(registrationId/text())[1]','nvarchar(max)') AS RegistrationId
,ti.value('(transactionId/text())[1]','nvarchar(max)') AS TransactionId
,ti.value('(status/text())[1]','nvarchar(max)') AS [Status]
FROM #xml.nodes('/n1:Envelope/n1:Body/n2:createTransactionResponse/transactionResponse/transaction-info') A(ti);
--And this is for lazy people :-)
SELECT #xml.value('(//*:registrationId)[1]','nvarchar(max)') AS RegistrationId
,#xml.value('(//*:transactionId)[1]','nvarchar(max)') AS TransactionId
,#xml.value('(//*:status)[1]','nvarchar(max)') AS [Status];
Hint: The last one (for lazy people) uses the deep search (with //) and uses a wildcard for the namespace. This is very dangerous if the elements might occur more than once within your XML.

Answer 2

The XML you have is pretty complex. You have multiple namespaces, with different nodes using different ones. This means you need to use WITH XMLNAMESPACES to declare all these.
Then you need to use nodes to navigate the to needed node, prefixing them with the appropriate namespaces, till you get to transaction-info. Then you use use value to get the information.
#Status isn't what you're after here, that's for is you have something like <node status=1\>, you need to get the text() value of the node.
This results in the below:
DECLARE #X xml = '<?xml version="1.0" encoding="UTF-8"?>
<SOAP-ENV:Envelope
xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/">
<SOAP-ENV:Header/>
<SOAP-ENV:Body>
<ns:createTransactionResponse
xmlns:impl="http://traffic2/traffic/services/service1"
xmlns:ns="http://www.regfrez.com/schemas/service1_V2/SharedResources/XMLSchema/Schema.xsd"
xmlns:tns="http://www.abc.ae/Activematrix/ESB/service1/1_0">
<transactionResponse>
<transaction-info>
<registrationId>R1234</registrationId>
<trialId>T12345</trialId>
<transactionId>12345</transactionId>
<transactionDate>27-02-2020:08:47</transactionDate>
<status>Confirmed</status>
</transaction-info>
</transactionResponse>
</ns:createTransactionResponse>
</SOAP-ENV:Body>
</SOAP-ENV:Envelope>';
WITH XMLNAMESPACES ('http://schemas.xmlsoap.org/soap/envelope/' AS [SOAP-ENV],
'http://traffic2/traffic/services/service1' AS impl, --YOu don't use this in the XML, but incldued anyway, for completeness
'http://www.regfrez.com/schemas/service1_V2/SharedResources/XMLSchema/Schema.xsd' AS ns,
'http://www.abc.ae/Activematrix/ESB/service1/1_0' AS tns) --YOu don't use this in the XML, but incldued anyway, for completeness
SELECT ti.value('(status/text())[1]','varchar(10)') AS [Status],
ti.value('(transactionId/text())[1]','int') AS Trans,
ti.value('(registrationId/text())[1]','varchar(10)') AS ID
FROM #X.nodes('SOAP-ENV:Envelope/SOAP-ENV:Body/ns:createTransactionResponse/transactionResponse/transaction-info') N(ti);