XML parsing error when trying to read node values of XML - sql-server

Question

I have a XML file(TestArticles.xml), which I need to import into SQL SERVER 2014 and read the data from the various nodes and insert it into few other tables in the same database.
TestArticles.xml
<?xml version="1.0" encoding="UTF-8"?>
<Articles>
<sv:node sv:name="test1"
xmlns:sv="http://www.jcp.org/jcr/sv/1.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<sv:property sv:name="jcr:primaryType" sv:type="Name">
<sv:value>mgnl:tax-article</sv:value>
</sv:property>
<sv:property sv:name="jcr:createdBy" sv:type="String">
<sv:value>system</sv:value>
</sv:property>
</sv:node>
<sv:node sv:name="test2"
xmlns:sv="http://www.jcp.org/jcr/sv/1.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<sv:property sv:name="jcr:primaryType" sv:type="Name">
<sv:value>mgnl:tax-article</sv:value>
</sv:property>
<sv:property sv:name="jcr:createdBy" sv:type="String">
<sv:value>admin</sv:value>
</sv:property>
</sv:node>
</Articles>
I tried the following steps:
Import XML data from an XML file into SQL Server table using the OPENROWSET function
USE DataMigration
GO
CREATE TABLE ArticlesXML
(
Id INT IDENTITY PRIMARY KEY,
ArticlesXMLData XML,
LoadedDateTime DATETIME
)
INSERT INTO ArticlesXML(ArticlesXMLData, LoadedDateTime)
SELECT CONVERT(XML, BulkColumn) AS BulkColumn, GETDATE()
FROM OPENROWSET(BULK 'C:\Temp\articles.xml', SINGLE_BLOB) AS x;
SELECT * FROM ArticlesXML
Parsing the XML data using the OPENXML function
USE DataMigration
GO
DECLARE #XML AS XML, #hDoc AS INT, #SQL NVARCHAR (MAX)
SELECT #XML = ArticlesXMLData FROM ArticlesXML
EXEC sp_xml_preparedocument #hDoc OUTPUT, #XML
SELECT ArticleName
FROM OPENXML(#hDoc, 'Articles/sv:node')
WITH
(
ArticleName [varchar](100) '#sv:name'
)
EXEC sp_xml_removedocument #hDoc
GO
On executing the above query, I am getting the below mentioned error:
Msg 6603, Level 16, State 2, Line 14
XML parsing error: Reference to undeclared namespace prefix: 'sv'.
I want to fetch the following from the TestArticles.xml
sv:name from each sv:node
sv:value from each sv:property node within the sv:node
Can anyone please help me to resolve this issue?

Answer 1

With this query you can read all data within your XML:
CREATE TABLE ArticlesXML
(
Id INT IDENTITY PRIMARY KEY,
ArticlesXMLData XML,
LoadedDateTime DATETIME
)
GO
SET IDENTITY_INSERT ArticlesXML ON;
INSERT INTO ArticlesXML(Id,ArticlesXMLData,LoadedDateTime) VALUES
(1,
'<?xml version="1.0" encoding="UTF-8"?>
<Articles>
<sv:node sv:name="test1"
xmlns:sv="http://www.jcp.org/jcr/sv/1.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<sv:property sv:name="jcr:primaryType" sv:type="Name">
<sv:value>mgnl:tax-article</sv:value>
</sv:property>
<sv:property sv:name="jcr:createdBy" sv:type="String">
<sv:value>system</sv:value>
</sv:property>
</sv:node>
<sv:node sv:name="test2"
xmlns:sv="http://www.jcp.org/jcr/sv/1.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<sv:property sv:name="jcr:primaryType" sv:type="Name">
<sv:value>mgnl:tax-article</sv:value>
</sv:property>
<sv:property sv:name="jcr:createdBy" sv:type="String">
<sv:value>admin</sv:value>
</sv:property>
</sv:node>
</Articles>',GETDATE());
SET IDENTITY_INSERT ArticlesXML OFF;
WITH XMLNAMESPACES('http://www.jcp.org/jcr/sv/1.0' AS sv
,'http://www.w3.org/2001/XMLSchema-instance' AS xsi)
SELECT Id
,Article.value('#sv:name','varchar(max)') AS ArticleName
,Property.value('#sv:name','varchar(max)') AS PropertyName
,Property.value('#sv:type','varchar(max)') AS PropertyType
,Property.value('sv:value[1]','varchar(max)') AS PropertyValue
,LoadedDateTime
FROM ArticlesXML
CROSS APPLY ArticlesXML.ArticlesXMLData.nodes('/Articles/sv:node') A(Article)
CROSS APPLY A.Article.nodes('sv:property') AS B(Property);
--CleanUp
--DROP TABLE ArticlesXML;
The Result
+----+-------------+-----------------+--------------+------------------+-------------------------+
| Id | ArticleName | PropertyName | PropertyType | PropertyValue | LoadedDateTime |
+----+-------------+-----------------+--------------+------------------+-------------------------+
| 1 | test1 | jcr:primaryType | Name | mgnl:tax-article | 2016-03-31 13:52:26.753 |
+----+-------------+-----------------+--------------+------------------+-------------------------+
| 1 | test1 | jcr:createdBy | String | system | 2016-03-31 13:52:26.753 |
+----+-------------+-----------------+--------------+------------------+-------------------------+
| 1 | test2 | jcr:primaryType | Name | mgnl:tax-article | 2016-03-31 13:52:26.753 |
+----+-------------+-----------------+--------------+------------------+-------------------------+
| 1 | test2 | jcr:createdBy | String | admin | 2016-03-31 13:52:26.753 |
+----+-------------+-----------------+--------------+------------------+-------------------------+
If you want to query this somehow (filter, aggregation...) you have several chances:
put the result into a temp table and use this however you like
same with a declared table variable
Surround and use it as CTE
(This looks like this)
WITH XMLNAMESPACES('http://www.jcp.org/jcr/sv/1.0' AS sv
,'http://www.w3.org/2001/XMLSchema-instance' AS xsi)
,TableDataCTE AS
(
SELECT Id
,Article.value('#sv:name','varchar(max)') AS ArticleName
,Property.value('#sv:name','varchar(max)') AS PropertyName
,Property.value('#sv:type','varchar(max)') AS PropertyType
,Property.value('sv:value[1]','varchar(max)') AS PropertyValue
,LoadedDateTime
FROM ArticlesXML
CROSS APPLY ArticlesXML.ArticlesXMLData.nodes('/Articles/sv:node') A(Article)
CROSS APPLY A.Article.nodes('sv:property') AS B(Property)
)
SELECT * FROM TableDataCTE;
WHERE ...
or you might use XQuery predicats ( e.g. .nodes('/Articles/sv:node[sv:name="test1"]') )
EDIT The enhanced SELECT to reflect your need to read multi-value properties according to the sampe you gave in your comment:
WITH XMLNAMESPACES('http://www.jcp.org/jcr/sv/1.0' AS sv
,'http://www.w3.org/2001/XMLSchema-instance' AS xsi)
SELECT Id
,Article.value('#sv:name','varchar(max)') AS ArticleName
,Property.value('#sv:name','varchar(max)') AS PropertyName
,Property.value('#sv:type','varchar(max)') AS PropertyType
,Value.value('.','varchar(max)') AS PropertyValue
,LoadedDateTime
FROM ArticlesXML
CROSS APPLY ArticlesXML.ArticlesXMLData.nodes('/Articles/sv:node') A(Article)
CROSS APPLY A.Article.nodes('sv:property') AS B(Property)
CROSS APPLY B.Property.nodes('sv:value') AS C(Value);
The result:
+----+-------------+-----------------+--------------+------------------+-------------------------+
| Id | ArticleName | PropertyName | PropertyType | PropertyValue | LoadedDateTime |
+----+-------------+-----------------+--------------+------------------+-------------------------+
| 1 | test1 | jcr:primaryType | Name | mgnl:tax-article | 2016-03-31 20:30:27.240 |
+----+-------------+-----------------+--------------+------------------+-------------------------+
| 1 | test1 | jcr:createdBy | String | system | 2016-03-31 20:30:27.240 |
+----+-------------+-----------------+--------------+------------------+-------------------------+
| 1 | test2 | jcr:primaryType | Name | mgnl:tax-article | 2016-03-31 20:30:27.240 |
+----+-------------+-----------------+--------------+------------------+-------------------------+
| 1 | test2 | jcr:createdBy | String | admin | 2016-03-31 20:30:27.240 |
+----+-------------+-----------------+--------------+------------------+-------------------------+
| 1 | test3 | jcr:createdBy | String | admin1 | 2016-03-31 20:30:27.240 |
+----+-------------+-----------------+--------------+------------------+-------------------------+
| 1 | test3 | jcr:createdBy | String | admin2 | 2016-03-31 20:30:27.240 |
+----+-------------+-----------------+--------------+------------------+-------------------------+
| 1 | test3 | jcr:createdBy | String | admin3 | 2016-03-31 20:30:27.240 |
+----+-------------+-----------------+--------------+------------------+-------------------------+
| 1 | test3 | jcr:createdBy | String | admin4 | 2016-03-31 20:30:27.240 |
+----+-------------+-----------------+--------------+------------------+-------------------------+
| 1 | test3 | jcr:createdBy | String | admin5 | 2016-03-31 20:30:27.240 |
+----+-------------+-----------------+--------------+------------------+-------------------------+
| 1 | test3 | jcr:createdBy | String | admin6 | 2016-03-31 20:30:27.240 |
+----+-------------+-----------------+--------------+------------------+-------------------------+

Answer 2

You need to explicitly define the prefix first, for example, using WITH XMLNAMESPACES and XQuery :
;WITH XMLNAMESPACES('http://www.jcp.org/jcr/sv/1.0' as sv)
SELECT c.value('#sv:name', 'varchar(100)') As Name
FROM ArticlesXML a
CROSS APPLY ArticlesXMLData.nodes('Articles/sv:node') t(c)