A Microsoft Office (Excel, Word) forum. OfficeFrustration

If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below.

Go Back   Home » OfficeFrustration forum » Microsoft Access » Database Design
Site Map Home Register Authors List Search Today's Posts Mark Forums Read  

Linked Tables - indexes



 
 
Thread Tools Display Modes
  #1  
Old March 25th, 2010, 08:46 PM posted to microsoft.public.access.tablesdbdesign
osupratt via AccessMonster.com
external usenet poster
 
Posts: 7
Default Linked Tables - indexes

I have most of my tables in my front-end Access 'linked' to a sql server back-
end. I have some reports that take a couple of minutes to run (sql reports,
not access). When running a query plan or optimizer it tells me of some
indexes to add on the back-end sql tables. When adding these indexes the
reports now run very fast or instantaneous. The problem I have now is that I
get errors on my front-end saying Timeout occurred. Has anyone had any
experience with this and why would my front-end act like this all of a sudden?
Thanks.

--
Message posted via http://www.accessmonster.com

  #2  
Old March 25th, 2010, 09:20 PM posted to microsoft.public.access.tablesdbdesign
John W. Vinson
external usenet poster
 
Posts: 18,261
Default Linked Tables - indexes

On Thu, 25 Mar 2010 19:46:32 GMT, "osupratt via AccessMonster.com"
u41837@uwe wrote:

I have most of my tables in my front-end Access 'linked' to a sql server back-
end. I have some reports that take a couple of minutes to run (sql reports,
not access). When running a query plan or optimizer it tells me of some
indexes to add on the back-end sql tables. When adding these indexes the
reports now run very fast or instantaneous. The problem I have now is that I
get errors on my front-end saying Timeout occurred. Has anyone had any
experience with this and why would my front-end act like this all of a sudden?
Thanks.


If you're using ODBC to link to the tables, Access has stashed some
information about the backend table in the frontend, and by changing the
structure of the backend (by adding an index), the information is out of date.
I've gotten in the habit of routinely *deleting* the link from the frontend
and using File... Get External Data... Link... ODBC to relink to the table
after any structural change to the table.
--

John W. Vinson [MVP]
  #3  
Old March 26th, 2010, 03:10 AM posted to microsoft.public.access.tablesdbdesign
John W. Vinson
external usenet poster
 
Posts: 18,261
Default Linked Tables - indexes

On Thu, 25 Mar 2010 16:29:30 -0400, "Roger Carlson"
wrote:

John,

Have you had trouble with the Relinker?


Yes, very much so, if there has been a structural change to the backend table.
I've had wierd things - data coming into the wrong field (even different
datatype fields), no records displayed at all, searches failing. I now ALWAYS
delete and recreate the link after making any table structure change in the
backend.
--

John W. Vinson [MVP]
 




Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is Off
HTML code is Off
Forum Jump


All times are GMT +1. The time now is 11:14 PM.


Powered by vBulletin® Version 3.6.4
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Copyright ©2004-2024 OfficeFrustration.
The comments are property of their posters.