Uniqueidentifier conversion failed when Importing XML file to SQL Server - sql

Question

I'm trying to import data from an XML file into a SQL Server table. However, I'm getting the error:
Conversion failed when converting from a character string to uniqueidentifier
It says it's in state 2 of Line 6 (Id3), but I assume the conversion is failing in other places.
XML:
<ImportExportObject>
<Objects>
<MyObject>
<Id>123e5c8c-a7fc-40da-440e-12348bc612e8</Id>
<Id2>123e5c8c-a7fc-40da-440e-12348bc612e8</Id2>
<Name>en</Name>
<Id3>123e5c8c-a7fc-40da-440e-12348bc612e8</Id3>
</MyObject>
</Objects>
</ImportExportObject>
SQL code:
INSERT INTO MyTable(ID, Id2, Name, Id3)
SELECT
MyXMLDocument.query('Id').value('.', 'uniqueidentifier'),
MyXMLDocument.query('Id2').value('.', 'uniqueidentifier'),
MyXMLDocument.query('Name').value('.', 'NVARCHAR(50)'),
MyXMLDocument.query('Id3').value('.', 'uniqueidentifier'),
FROM (SELECT CAST(MyXMLDocument AS xml)
FROM OPENROWSET(BULK 'C:\Users\myUser\Documents\MyXMLDocument.xml', SINGLE_BLOB) AS T(MyXMLDocument)) AS T(MyXMLDocument)
CROSS APPLY MyXMLDocument.nodes('ImportExportObject/Objects/MyObject') AS MyXMLDocument (MyObject);
How do I resolve this error?
I've been unable to get Select Cast and Convert to work - and .value() requires string literals so '#Id' doesn't seem to work.
Quite unsure here - any help is much appreciated!

Answer 1

How about having MyTable with an automatically imported id and not importing that? Would that work for what you want?

Answer 2

You can the code below to find which values cannot be converted to uniqueidentifier:
SELECT
MyXMLDocument.query('Id').value('.', 'NVARCHAR(50)'),
MyXMLDocument.query('Id2').value('.', 'NVARCHAR(50)'),
MyXMLDocument.query('Id3').value('.', 'NVARCHAR(50)')
FROM (SELECT CAST(MyXMLDocument AS xml)
FROM OPENROWSET(BULK 'C:\Users\myUser\Documents\MyXMLDocument.xml', SINGLE_BLOB) AS T(MyXMLDocument)) AS T(MyXMLDocument)
CROSS APPLY MyXMLDocument.nodes('ImportExportObject/Objects/MyObject') AS MyXMLDocument (MyObject)
WHERE TRY_CAST(MyXMLDocument.query('Id').value('.', 'NVARCHAR(50)') AS uniqueidentifier) IS NULL
OR TRY_CAST(MyXMLDocument.query('Id2').value('.', 'NVARCHAR(50)') AS uniqueidentifier) IS NULL
OR TRY_CAST(MyXMLDocument.query('Id3').value('.', 'NVARCHAR(50)') AS uniqueidentifier) IS NULL
The idea is to use TRY_CAST which will return NULL if the data cannot be converted.

Answer 3

declare #x xml = N'<ImportExportObject>
<Objects>
<MyObject>
<Id>123e5c8c-a7fc-40da-440e-12348bc612e8</Id>
<Id2>123e5c8c-a7fc-40da-440e-12348bc612e8</Id2>
<Name>en</Name>
<Id3>123e5c8c-a7fc-40da-440e-12348bc612e8</Id3>
</MyObject>
</Objects>
</ImportExportObject>';
SELECT
MyXML.MyObject.value('Id[1]', 'uniqueidentifier'),
MyXML.MyObject.value('Id2[1]', 'uniqueidentifier'),
MyXML.MyObject.value('Name[1]', 'NVARCHAR(50)'),
MyXML.MyObject.value('Id3[1]', 'uniqueidentifier')
FROM
(
SELECT #x
-- CAST(MyXMLDocument AS xml) FROM OPENROWSET(BULK 'C:\Users\myUser\Documents\MyXMLDocument.xml', SINGLE_BLOB)
) AS T(MyXMLDocument)
CROSS APPLY MyXMLDocument.nodes('./ImportExportObject/Objects/MyObject') AS MyXML(MyObject);