Provide WCF service caller to a SQL server that is access by a technical user account

Hi,
we have a WCF Service that is hosted in a windows service and access a SQL Server database. The database is accessed with the technical user the windows service runs with. That means nevertheless of the WCF service caller, the database is always
accessed in context of the technical user. Furthermore some company users access the database via the SQL Management Studio and sign in via Windows Authentication.
The management now wants us to provide a change log functionality. In case data is changed by the WCF service the caller should be logged. In case of using the SQL Management Studio the domain-user's account should be logged.
Because both ways must be supported we want to use a table trigge to monitor insert/update/delete ddl events, but we got struggled by passing the WCF service caller to the SQL server database.
Does anyone have a good idea for the issue? Any advice is appreciated.
Kind regards,
Christian

Do you know a way to use the 'SET CONTEXT_INFO' expression wth LINQ2SQL?
This is a T-SQL forum. There are other forms for LINQ.
No, I don't know LINQ. Then again, why on earth would you? This would be a command you would submit when the WCF connects. Ah, of course, you are only connecting when you submit a query. Which you do through LINQ. Oh well. Could be an incitement to move
away from LINQ maybe? :-)
Erland Sommarskog, SQL Server MVP, [email protected]

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Provide WCF service caller to a SQL server that is access by a technical user account

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