Access Connected to SQL Server: Get User Name in Form Query - tsql

Question

I use Access with linked tables to SQL Server 2008 R2 (ODBC connection). Via a access form I select the following query when opening the access form (the query code is entered in Design View > Form Properties > Record Source):
SELECT
mp_industry_description.group_name,
mp_industry_description.industry_description
FROM
((ax_id_storage
INNER JOIN
mn_entity
ON ax_id_storage.id_bb_global_company = mn_entity.id_bb_global_company)
INNER JOIN
mp_industry
ON mn_entity.industry_subroup_num = mp_industry.subgroup_num)
INNER JOIN
mp_industry_description
ON mp_industry.industry_description_group_num = mp_industry_description.industry_group_num;
The query works fine. Table ax_id_storage contains a column with all possible user names (userID). Therefore, the above query gives me several row entries, one for each user. I want to have only one user, which is the one who is currently executing the query. In a SQL Server query, I can adjust for this by adding:
WHERE ax_id_storage.userID = (SELECT nt_username FROM sys.sysprocesses WHERE (spid = ##SPID));
at the end of the first query. However, this does not work when I use the exact same command in Access. I get an error:
Syntax error in query expression 'ax_id_storage.userID = (SELECT
nt_username FROM sys.sysprocesses WHERE (spid = ##SPID))'.
How can I get the user name in Access?

Answer 1

I found the solution. There were three problems with my code:
First, I had to link the table sys.sysprocesses from the SQL server into Access.
Second, the command
WHERE ax_id_storage.userID = (SELECT nt_username FROM sys.sysprocesses
WHERE (spid = ##SPID));
had to be changed into
WHERE ax_id_storage.userID = (SELECT nt_username FROM
sys.sysprocesses)
as ##SPID is not executable in Access, onlny in SQL Server itself.
And third, Access does not allow INNER JOINS concatenated without parentheses. Therefore, I had to add them in the following way:
Select a FROM (table1 INNER JOIN table 2 ON table1.a = table2.a) INNER
JOIN table 3 on [...]

Answer 2

I have a similar topic with ODBC, attached tables and ADO connections from the same MS Access Client to a SQL Server DB. There I have found the "nt_username" not working. However, the you have 3 or more different connections the "hostaddress" is a good thing to use.
I first insert a record containing the username into a table (secUserSession_tbl) on the server (with the respective ##SPID) and then I use the following view to propagate the username to all sessions from the same host:
CREATE VIEW secSessionUser_vw
AS
SELECT su.UserID, su.Login from sys.sysprocesses as sp
INNER JOIN secSessionUser_tbl AS su ON sp.hostprocess = su.hostprocess
WHERE sp.hostprocess = (SELECT hostprocess FROM sys.sysprocesses WHERE spid = ##SPID)
This view can now be joined with every table or view and returns a username and/or respective permissions.