SQL server XML type - sql

Question

I have an XML type column in SQL server:
<LogMessage xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:type="LogMessageBusinessServiceRequest">
<Application>Services.Business.myapp</Application>
<Time>2013-05-30T15:01:38.932Z</Time>
<Level>Info</Level>
<Message>MultiQuery Biz Request</Message>
<MachineName>Machine1</MachineName>
<ThreadId>16084</ThreadId>
<Callsite>BLAH</Callsite>
<CreatedBy>Machine1\svc_biz_myapp</CreatedBy>
<Context>
<myappExtraInfo xmlns="http://services.somedomain.com/myapp/logging/extraInfo" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<CallType>MultiProcessQuery</CallType>
<RequestId>r163505508498822282742</RequestId>
<FirmId>160</FirmId>
<PMFirmId>203</PMFirmId>
<SubscriptionId>0</SubscriptionId>
<Token />
<LastClientSvcTimeMs>0</LastClientSvcTimeMs>
<ResultCode>0</ResultCode>
<ResultCodeDescription>OK</ResultCodeDescription>
<ElapsedTimeTotalMs>110</ElapsedTimeTotalMs>
<ElapsedTimeMtMs>110</ElapsedTimeMtMs>
<ElapsedTimeDacMs>109</ElapsedTimeDacMs>
<ElapsedTimePMSSMs>-1</ElapsedTimePMSSMs>
</myappExtraInfo>
</Context>
I want to get the FirmID from there. But I am not able with the following section of my select statement:
select
[Body].value('(/LogMessage/Context/myappExtraInfo/FirmId)[1]', 'varchar(max)') FirmID
What am I doing wrong?
Thanks for your time.
Shiyam

Answer 1

Try this - you need to respect the XML namespace that's defined on your <myappExtraInfo> node (and thus applies to all subnodes, too):
DECLARE #Test TABLE (ID INT NOT NULL, XmlContent XML)
INSERT INTO #Test VALUES(1,
'<LogMessage xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:type="LogMessageBusinessServiceRequest">
<Application>Services.Business.myapp</Application>
<Time>2013-05-30T15:01:38.932Z</Time>
<Level>Info</Level>
<Message>MultiQuery Biz Request</Message>
<MachineName>Machine1</MachineName>
<ThreadId>16084</ThreadId>
<Callsite>BLAH</Callsite>
<CreatedBy>Machine1\svc_biz_myapp</CreatedBy>
<Context>
<myappExtraInfo xmlns="http://services.somedomain.com/myapp/logging/extraInfo" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<CallType>MultiProcessQuery</CallType>
<RequestId>r163505508498822282742</RequestId>
<FirmId>160</FirmId>
<PMFirmId>203</PMFirmId>
<SubscriptionId>0</SubscriptionId>
<Token />
<LastClientSvcTimeMs>0</LastClientSvcTimeMs>
<ResultCode>0</ResultCode>
<ResultCodeDescription>OK</ResultCodeDescription>
<ElapsedTimeTotalMs>110</ElapsedTimeTotalMs>
<ElapsedTimeMtMs>110</ElapsedTimeMtMs>
<ElapsedTimeDacMs>109</ElapsedTimeDacMs>
<ElapsedTimePMSSMs>-1</ElapsedTimePMSSMs>
</myappExtraInfo>
</Context>
</LogMessage>')
;WITH XMLNAMESPACES('http://services.somedomain.com/myapp/logging/extraInfo' AS ns)
SELECT
XmlContent.value('(/LogMessage/Context/ns:myappExtraInfo/ns:FirmId)[1]', 'int')
FROM #Test
WHERE ID = 1
This returns the value 160 to me.