Solved

EXECTE AS Permissions problem while trunacating table

Posted on 2009-05-19
2
202 Views
Last Modified: 2012-05-07
I have a stored procedure, called from Access as a pass through query, that works for me but not for the users. The error message is:

'Cannot find the object "AgrRelations_Materials" because it does not exist or you do not have permissions.'

This procedure truncates then recreates some lookup tables. After a bit of Googling I have come to the conclusion that the problem is due to the TRUNCATE statements which, apparently, do not follow the normal pattern of ownership chaining (which I had never heard of until today). I have kind of confirmed this by replacing the TRUNCATE statements with delete statements, and the users can now use the procedure.

However, I wanted to use TRUNCATE as it is faster, so I tried wrapping an EXECUTE AS then REVERT around the TRUNCATE statements:

EXECUTE AS USER = 'dbo'
TRUNCATE TABLE Relations.AgrRelations_Materials
REVERT

Although this still works for me the users get the following:
Cannot execute as the database principal because principal dbo does not exist, this type of principal cannot be impersonated, or you do not have the permission.

dbo is a user in this database and owns most of the schemas, including the Relations schema that these tables are in.
More Googling and I am stuck. The database has not been restored and does not meet the criteria in kb/913423.

Any help gratefully received: Im a relative newbie and  I expect this will come up a lot.
0
Comment
Question by:Blim2
2 Comments
 
LVL 26

Accepted Solution

by:
tigin44 earned 250 total points
ID: 24420378
0
 

Author Comment

by:Blim2
ID: 24420442
The solution recommended is to create a table truncating procedure with EXECUTE AS SELF. I could then call this from my original procedure and maybe even parameterise it to accept table names. That sounds great but  what happens if I leave the company. Won't EXECUTE AS SELF stamp my credentials on the procedure and won't the procedure therefore stop working if my Windows logon is removed?
0

Featured Post

Best Practices: Disaster Recovery Testing

Besides backup, any IT division should have a disaster recovery plan. You will find a few tips below relating to the development of such a plan and to what issues one should pay special attention in the course of backup planning.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
Get the latest status 8 32
Sql server function help 15 31
SQL Querying data from 3 tables, all with 1 common column 4 37
Insert query into temp tables using Coldfusion 3 22
This article explains how to reset the password of the sa account on a Microsoft SQL Server.  The steps in this article work in SQL 2005, 2008, 2008 R2, 2012, 2014 and 2016.
I have a large data set and a SSIS package. How can I load this file in multi threading?
Via a live example, show how to extract insert data into a SQL Server database table using the Import/Export option and Bulk Insert.
Via a live example, show how to set up a backup for SQL Server using a Maintenance Plan and how to schedule the job into SQL Server Agent.

832 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question