Re: Under performing queries can have their execution avoided by an application?

Ana Ribeiro wrote:
> Hello,
> We have an application which gives the users the option to build on-
> line queries which will retrieve data from the Oracle 9i database in
> ANY way they want.
>
> The obvious problem we have is that some queries executes full table
> scans in very big tables, all sorts of bad queries have been issued by
> the users - and the system performance is currently very bad!
>
> My question is: is there a way to prevent the users to run very bad
> queries? I mean, if the application can check that the query doesn't
> have "enough arguments" or has a very high cost and return a warning
> message to the user, telling him that this can not be executed.
>
> Another idea would be configure something inside oracle to prevent
> "very bad" queries to be executed ...
>
> Does anyone have any ideas about it?
>
> Many thanks in advance!
> Ana

As Sybrand says look at creating a PROFILE for those users: http://www.psoug.org/reference/profiles.html Also look at the possibility of leveraging Resource Management: http://www.psoug.org/reference/dbms_res_mgr.html

-- 
Daniel A. Morgan
University of Washington
damorgan_at_x.washington.edu
(replace x with u to respond)
Puget Sound Oracle Users Group
www.psoug.org