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How To Log In T-SQL

- 1 answer

I'm using ADO.NET to access SQL Server 2005 and would like to be able to log from inside the T-SQL stored procedures that I'm calling. Is that somehow possible?

I'm unable to see output from the 'print'-statement when using ADO.NET and since I want to use logging just for debuging the ideal solution would be to emit messages to DebugView from SysInternals.

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Answer

I solved this by writing a SQLCLR-procedure as Eric Z Beard suggested. The assembly must be signed with a strong name key file.

using System;
using System.Data;
using System.Data.SqlClient;
using System.Data.SqlTypes;
using Microsoft.SqlServer.Server;

public partial class StoredProcedures
{
    [Microsoft.SqlServer.Server.SqlProcedure]
    public static int Debug(string s)
    {
        System.Diagnostics.Debug.WriteLine(s);
            return 0;
        }
    }
}

Created a key and a login:

USE [master]
CREATE ASYMMETRIC KEY DebugProcKey FROM EXECUTABLE FILE =
'C:\..\SqlServerProject1\bin\Debug\SqlServerProject1.dll'

CREATE LOGIN DebugProcLogin FROM ASYMMETRIC KEY DebugProcKey 

GRANT UNSAFE ASSEMBLY TO DebugProcLogin  

Imported it into SQL Server:

USE [mydb]
CREATE ASSEMBLY SqlServerProject1 FROM
'C:\..\SqlServerProject1\bin\Debug\SqlServerProject1.dll' 
WITH PERMISSION_SET = unsafe

CREATE FUNCTION dbo.Debug( @message as nvarchar(200) )
RETURNS int
AS EXTERNAL NAME SqlServerProject1.[StoredProcedures].Debug

Then I was able to log in T-SQL procedures using

exec Debug @message = 'Hello World'
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source: stackoverflow.com
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