Solved

Multiple access

Posted on 1998-07-10
4
211 Views
Last Modified: 2010-03-19
What is the best way of handling multiple accesses to a table? I'm using C and the dbxxx (dbinit, dbopen, etc.)functions. I don't know how MS SQL deals with this. If two processes come in at the same time (or nearly so), does one get kicked out? Is there some sort of programmatic loop I can do on one of the dbxxx functions to keep trying rather than just failing?
0
Comment
Question by:flfmdll
  • 2
4 Comments
 

Accepted Solution

by:
clarkd earned 40 total points
ID: 1091726
ms sql server will handle the situation for you.  when two processes attempt to access the table sql server will first decide what process attempted to  access the table first.  if it can do so then sql server will give access to the first process and decide, based upon the type of process, wether or not the table can also be acessed by the second process or if it will need to stand in line and wait for the first process to end.
if sql server cannot determine wich process requested access to the table, sql will randomly select which process gets first access.

0
 

Author Comment

by:flfmdll
ID: 1091727
So it will not dump one process (return to the program with an error) and let the other process go through? So I don't have to do anything programmaticaly with MS SQL?

0
 
LVL 7

Expert Comment

by:spiridonov
ID: 1091728
Your secon process will either be 'queued' or allowed access: depend on the lock type used by the first process.
0
 

Author Comment

by:flfmdll
ID: 1091729
Thanks. I'll try this and see how it works.
0

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

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

Let's review the features of new SQL Server 2012 (Denali CTP3). It listed as below: PERCENT_RANK(): PERCENT_RANK() function will returns the percentage value of rank of the values among its group. PERCENT_RANK() function value always in be…
I have a large data set and a SSIS package. How can I load this file in multi threading?
This video shows how to set up a shell script to accept a positional parameter when called, pass that to a SQL script, accept the output from the statement back and then manipulate it in the Shell.
This videos aims to give the viewer a basic demonstration of how a user can query current session information by using the SYS_CONTEXT function

863 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

Need Help in Real-Time?

Connect with top rated Experts

26 Experts available now in Live!

Get 1:1 Help Now