Larry,

If there is an equivalent of a all_tables or user_tables in sybase, run a query 
to that table to check the existence of the table in question, and if that 
query returns a negative, do not run the second SQL that you currently are 
running against the table in question.

Joe



________________________________
From: L G Robinson <[email protected]>
To: [email protected]
Sent: Tuesday, February 3, 2009 9:51:14 AM
Subject: Trapping SQL error in an active link

Hi Folks,

I have a problem with an active link set field action that utilizes an SQL 
statement. The problem stems from the fact that the SQL command is issued 
against a database table that is maintained by another group. Occasionally, 
they will update the table in the middle of the day, causing the table to 
briefly cease to exist or lose it's permissions. When this happens, the active 
link fails with one of the following error messages:

ARERR [552] Failure during SQL operation to the database:
E911..E911Remedy not found. Specify owner.objectname or use sp_help to check 
whether the object exists.

ARERR [552] Failure during SQL operation to the database:
SELECT permission denied on object E911Remedy, database E911,owner dbo (Sybase 
10330)

This data is not critical to the normal functioning of the application, so I am 
looking for a solution that allows me to "ignore" this error in the active 
link. As far as I can tell, I can control what happens if "no requests match" 
and if "multiple requests match", but there is no way to trap the SQL error 
condition and choose to ignore it.

About the only thing I have been able to come up with so far is to run a cron 
job periodically that will check for the existence of the table and the correct 
permissions. The cron job could then set some external flag in the file system 
or call an API program to set some internal global within my application. Then 
I could check the global or the external flag in an active link before invoking 
the SQL call. Seems overly complicated and convoluted to me.

Does anyone have a better approach?

ARS: 5.01.02 patch 1313 on Solaris 2.8
Sybase: 12.5.2/EBF 11790 on Solaris 2.8


Thanks.
Larry


Larry Robinson                                  [email protected]
Office of Information Technology
NC State University                              919-515-5432 Voice
Raleigh, NC  27695-7109                          919-513-1893 FAX




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