Question

I have this code working

UPDATE UserData
SET Data.modify('delete(/UsersData/UserXml[@user_id=23445])[1]')            
WHERE Id = 11;

But when I try this code it throw ex

declare @myXmlQuery nvarchar(120)
set @myXmlQuery = '/UsersData/UserXml[@user_id=23445]'

UPDATE UserData
SET Data.modify('delete(sql:variable("@myXmlQuery"))[1]')
WHERE Id = 11;

I get this ex :

Msg 2264, Level 16, State 1, Line 11 XQuery
[UserData.Data.modify()]: Only non-document nodes may be deleted,
found ‘xs:string’

Any ideas ?

thanks.

Answer 1

A hacky way would be:

DECLARE @sql NVARCHAR(MAX), @myXmlQuery nvarchar(120);

set @myXmlQuery = N'/UsersData/UserXml[@user_id=23445]'

SET @sql = N'UPDATE UserData
SET Data.modify(''delete(' + @myXmlQuery + ')[1]'')
WHERE Id = 11;';

PRINT @sql;

-- EXEC sp_executesql @sql;

I’m sure the XML gurus will swing around with a more practical answer. I’m more of a relational guy. 🙂