sql server parse xml with namespace
Question
I'm trying to parse the following xml to get the first tag following the s:Body tag (in this case I'm looking for the string queryEE , in other messsages with the same Envelope/Body structure it will be different)
I began playing with it with something like this:
declare @text varchar(max)
set @text = N'
<s:Envelope xmlns:s="http://schemas.xmlsoap.org/soap/envelope/">
<s:Body xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<queryEE xmlns="http://xx.gob.gcaba.xx/">
<codeEE xmlns="">xxxx</codeEE>
</queryEE>
</s:Body>
</s:Envelope>'
declare @x xml
set @x = cast(@text as xml)
select @x.query('/s:Envelope')
But I get the error:
Msg 2229, Level 16, State 1, Line 16
XQuery [query()]: The name "s" does not denote a namespace.
Seems like I'm having troubles with the namespace stuff
When I try with select @x.query('/Envelope') I don't get any results at all
Thanks to the answers I got from @shnugo I could finally solve it with:
select @x.value('local-name((/*:Envelope/*:Body/*)[1])','nvarchar(100)')
2 answers
solution1
1 2019-09-26 08:21:00
Declare your namespace again when using xquery for xml with namespaces.
declare @text varchar(max)
set @text = N'
<s:Envelope xmlns:s="http://schemas.xmlsoap.org/soap/envelope/">
<s:Body xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<queryEE xmlns="http://xx.gob.gcaba.xx/">
<codeEE xmlns="">xxxx</codeEE>
</queryEE>
</s:Body>
</s:Envelope>'
declare @x xml
set @x = cast(@text as xml)
select @x.query('declare default element namespace "http://schemas.xmlsoap.org/soap/envelope/";
/Envelope')
solution2
1 ACCPTED 2019-09-26 09:20:48
Try it like this:
--your declaration
declare @text varchar(max)
set @text = N'
<s:Envelope xmlns:s="http://schemas.xmlsoap.org/soap/envelope/">
<s:Body xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<queryEE xmlns="http://xx.gob.gcaba.xx/">
<codeEE xmlns="">xxxx</codeEE>
</queryEE>
</s:Body>
</s:Envelope>'
declare @x xml
set @x = cast(@text as xml);
--The query
WITH XMLNAMESPACES('http://schemas.xmlsoap.org/soap/envelope/' AS s
,'http://xx.gob.gcaba.xx/' AS innerDflt)
select @x.value('(/s:Envelope/s:Body/innerDflt:queryEE/codeEE/text())[1]','nvarchar(100)');
Some background:
Your XML is a bit weird looking at the namespaces... if the construction is under your control, it would be worth to start here.
There is a namespace s: to define <Envelope> and <Body> . That is fine so far., But then the element <queryEE> defines a default namespace (no prefix!) and the embedded <codeEE> defines another (but empty.) default namespace, I'm pretty sure. that this empty namespaces is created within a query by combining XMLs together...
The default namespace tells the engine, that all nodes without a specific prefix are living within this namespace. So we have to address that.
My code is using WITH XMLNAMESPACES to declare all namespaces occuring in the XML. Different to the original XML I define a prefix ( innerDflt ) for the first defualt namespace. That means, we can address <innerDflt:queryEE> . The embedded element does not need a namespace. It is living within an empty default (=> no) namespace.
All this said, I just want to point out, that you can use a wildcard too:
select @x.value('(/*:Envelope/*:Body/*:queryEE/*:codeEE/text())[1]','nvarchar(100)')
And you might even use a deep search
select @x.value('(//*:codeEE/text())[1]','nvarchar(100)')
But the general advise is: Be as specific as possible.
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