How To: Implement Exclusive Access To A Given Record.
May 5, 2008
Purpose
I would like to know if it is possible and if so how to implement exclusive access to a given record within in a database table.
Example
For example, you can open a file system file with exclusive access so other processes cannot access the file until it is released. I would like to implement a solution that provides this same exclusive access at the database record level. Preferably a solution that does not require creating and managing table access state flags. (i.e. €“ FieldName.State = (Closed, Opened, Exclusive)) I would like for the database server to mange this solution and return an error status when trying to access a record that has been opened exclusively. Furthermore, I would like to avoid using triggers.
Application Utilization
I€™m working on a system that has multiple threads that are each responsible managing data from the same normalized table. Each of these system threads work on the same unique record in parallel. Therefore it is possible that thread (0)€™s changes could be overwritten by thread (n)€™s. I would like to have each thread open the unique record exclusively and release it when finished. All of the other threads would loop until the record is released.
Questions
1. Is it possible to implement this at the server level?
2. What would be the easiest best practice for implementing this functional requirement?
Thanks,
Sean
View 5 Replies
ADVERTISEMENT
Feb 5, 2003
Hi,
i need to run a restore of a database overnight onto a different server using the live data .bak file. however the job failed on the first run (last night) with the error:
"Exclusive access could not be obtained because the database is in use. ...."
how do i gain this Exclusive use via an SQL statement please?
View 8 Replies
View Related
Jul 12, 2004
Hi.
I need to access a database to modify, updates,... massively . It's possible to lock a database and have exclusive access?
(SQLServer 2000)
thanks.
Francisco
View 2 Replies
View Related
Feb 11, 2004
I have created a SQL Agent job that is supposed to essentially duplicate a production database to another database. The code I am using is:
step1
__________________________________________________ ______
declare @sql varchar(8000)
set @sql=''
select @sql=@sql+'kill '+cast(spid as varchar)+char(13)+char(10)
from sysprocesses where dbid=12
--Print (@SQL)
exec(@sql)
step2
__________________________________________________ ________
RESTORE DATABASE HIWDYNARPT FROM PRDBACKUP
WITH REPLACE
__________________________________________________ ______
This works when I test it during the day, however when it runs at night I get the following error in the job log:
Database in use. The system administrator must have exclusive use of the database to run the restore operation. [SQLSTATE 42000] (Error 3101) Backup or restore operation terminating abnormally. [SQLSTATE 42000] (Error 3013). The step failed.
I'm not sure why this happens because I have killed all open threads in step 1, and then create my own new thread in step two. Maybe someone else is initiating a new thread to quickly between the steps???
Anyway, I am trying to use:
__________________________________________________ __
ALTER DATABASE HIWDYNARPT
RESTRICTED_USER
WITH ROLLBACK IMMEDIATE
__________________________________________________ ____
...as an alternative to the T-SQL killing PID's, but SQL 7.0 SP4 does not seem to support restricted user like 2000. It keeps giving me a syntax error. Does anyone have any suggestions?
If I bring step 1 and step 2 together, separated by "GO", could this fix the problem?
Thanks in advance!
Ryan Hunt
View 5 Replies
View Related
Dec 8, 2007
Could anybody give a lead as to what I can do get rid off this error please.
I alread tried following:
use master
go
Alter Database dbname set single_user with rollback immediate;
go
Still have the issue. SQL 2005 Server actually did lock the db.
So ran
Alter Database dbname set multi_user;
go
and refresh Query and it switch back to multi user.
But I can't restore db yet.
Thank you
View 1 Replies
View Related
May 25, 2004
How to close the existing connections to a particluar database in sql server. Please note that i donot want to start stop sql server. I just want to close the existing connections so that i can do a restore on that database programatically.
I am using sqldmo for this purpose. Does anyone knows how to do that with sqldmo or is there any other method??
Waiting for your earliest replies
View 1 Replies
View Related
May 31, 2008
Hi!
We're using a backup with sql server agent when doing a backup / restore
procedure. In some cases I get the following error when the restore job
fails:
Executed as user: DOMAINAdministrator. Exclusive access could not be
obtained because the database is in use. [SQLSTATE 42000] (Error 3101)
RESTORE DATABASE is terminating abnormally. [SQLSTATE 42000] (Error 3013).
The step failed.
Is it related to unhandled lock? I've resolved this by restarting the sql
server. But is there a way to avoid such issues?
One more question. Is it OK to backup/restore database while there're users
connected? Or I can do only backup?
View 2 Replies
View Related
Sep 29, 2007
Hi All,
My question is regarding SQL Server database security. I want to create a login using SQL Server Authentication and assign it db_owner rights for my database. So far so good. But the critical part is that I want to give exclusive rights for my database to this user only i.e. no other users (dbo, guest etc) should be allowed to access my database.
It will be good to present here the scenario which I need to implement. I am running an ASP.NET application that uses SQL server 2005 db at back end. The database server might have other databases as well but I don't want the administrator (either SQL server admin or the server administrator) to be able to get access to my database or even view the schema. I don't want any other user except my own user to be able to detach the database or perform backup or restore operations.
I hope I was able to deliver the requirement.
View 6 Replies
View Related
Apr 11, 2007
Hi
I am trying to use sql server 2005 management stodio to restore a database. But I got this error message:
Exclusive access could not be obtained because the database is in use
Anyone know how to solve this problem?
Thanks
Li
View 45 Replies
View Related
Jun 15, 2007
I have a test database that is automatically restored from the live database each day at 2:30AM. I recently started receiving this message:
Exclusive access could not be obtained because the database is in use.
and the restore is not able to occur.
Any ideas on how I can prevent this from happening?
View 1 Replies
View Related
Jul 7, 2007
Hi everyone,
Hope somebody can help me on this.
I did a full BACKUP for two SQL databases using SQL Server Managament Studio. When trying to RESTORE the DBs, I get the following error:
"System.Data.SqlClient.SqlError: Exclusive access could not be obtained because the database is in use. (Microsoft.SqlServer.Smo)"
There are NO users using the application. These are DBs for the Portfolio Server 2007 application.
After exploring a little bit, I found that there are several "SLEEPING" processes with an "AWATING COMMAND" flag. The processes come from the Portfolio Server Application, maybe from previous sessions.
Can they be deleted? if so, would there be any serious consequences?
Thank you for your help on this.
Oscar E.
View 4 Replies
View Related
Aug 10, 2015
Any list of commands that require exclusive access in order for the command to complete? I had an instance today where a DBA executed sp_changedbowner command which is the alter database command on a production database and it locked it up.
View 0 Replies
View Related
Dec 28, 2007
Hi Guyz
it is taken from SQL2K5 SP2 readme.txt. Anyone have idea what to do to implement this ?
Our sp2 is failing. we suspect the above problem and researching it.we are running on default instance of SQL2K5 on win2003 ent sp2
"When you apply SP2, Setup upgrades system databases. If you have implemented restrictions on the ALTER DATABASE syntax, this upgrade may fail. Restrictions to ALTER DATABASE may include the following:
Explicitly denying the ALTER DATABASE statement.
A data definition language (DDL) trigger on ALTER DATABASE that rolls back the transaction containing the ALTER DATABASE statement.
If you have restrictions on ALTER DATABASE, and Setup fails to upgrade system databases to SP2, you must disable these restrictions and then re-run Setup."
thanks in advance.
View 4 Replies
View Related
Sep 26, 2007
I have an Access db that has a linked table to a sql table. The sql table has a UniqueIdentifier field in it. How do I create a new record through access in that table and have the UNIQUEIDENTIFIER autogenerated?
View 2 Replies
View Related
Jan 4, 2005
Hello folks,
I am using the following INSERT statement to add a new record in my table. I want to be able to get the Autonumber UserID field of the newly created record but I am getting the following error: "Characters found after end of SQL statement"
Code:
INSERT
INTO tblUser
(LoginName, UserPassword, EmailAddress, City)
Values
(@User, @UsrPassword, @EmailAddress, @City);
SELECT @@IDENTITY As 'Identity'
What is wrong in my statement?
How do I retrieve the Autonumber field of the newly created record?
How do I handle if the LoginName and/or EmailAddress already exists?
I want to be able save this INSERT statement as an Access Query and call it from my C# code.
I would appreciate any help.
Thanks
Mike
View 1 Replies
View Related
Jul 23, 2005
I'm trying to figure out what happened.I have have two Tables in SQLServer called "Contacts", and "Jobs"Whenever someone changes a record in either table I update two fieldscalled "Modby" and "Moddt" with a trigger. The Trigger may alsocontain other things as well.Here's the wierd thing.If the Modby Moddt statement is the first statement in the trigger Idon't get a "record changed by another user" but if it comes later inthe trigger I do.I think it has something to do with the LockDelay Key but I'm not sure.Any Ideas?
View 3 Replies
View Related
Jan 23, 2008
Ok, to start I will say I am a novice so detailed solutions are much appreciated. I believe I am on the right track. Here is what I am trying to accomplish. I have a page that uses an xml driven google map. When you click on the map marker, the info bubble displays brief information about a community and a link specified from the xml file. I have specified the links in the xml file to pass a query string variable ex: /community.aspx?name=uniqueCommunityNameHere. I tested this by simply placing a label on the community.aspx page that restated the "name" value - works fine (first commented out line of Page_Load). Now I need to complete my VB function that pulls the data record from the database - based on the parameter input from the query string - when the page loads. So if the user clicks the link on the marker for community1, it will populate community.aspx with info about community1 from the database... if they click community7 it will display that community info etc.
Data Table: "Community" Data Fields: ID, Name, Description, Address, City, State, Phone, SalesRep.
ASPX Page Design Elements: lblID, lblName, lblDesc, lblAddress.... etc.
Here is my start... I will need help with the sql statement for sure - how do I create a where clause from the query string parameter passed in?
Thanks so much for your help!
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load'My initial test to see that the query string is working lblName.Text = Request("name").ToString()
' Get the community info when loading community.aspx for the user selected communityIf Not IsPostBack ThenLoadCommunityInfo(Request("name").ToString())End IfEnd SubPrivate Sub LoadCommunityInfo(ByVal community)' Define data objectsDim conn As SqlConnectionDim comm As SqlCommandDim reader As SqlDataReader
' Read the connection string from Web.configDim connectionString As String = ConfigurationManager.ConnectionStrings("CONHTConnectionString").ConnectionString' Initialize connectionconn = New SqlConnection(connectionString)' Create commandcomm = New SqlCommand("SELECT * FROM Community WHERE Name = " & community, conn)' Enclose database code in Try-Catch-FinallyTry' Open the connectionconn.Open()' Execute the commandreader = comm.ExecuteReader()' Populate the list of community information -> Make the labels.text = the database fields --> lblName.text = table-Community field-"Name"lblName.Text = "Name"lblDesc.Text = "Description"....' Close the readerreader.Close()Catch' Display error messagedbErrorLabel.Text = "Error loading the community information!<br />"Finally' Close the connectionconn.Close()End TryEnd Sub
View 7 Replies
View Related
Jan 13, 2007
Assumig i have acces my_db.md and my_mdb.mdf (in instace named DVD377-14D9E48CSQLEXPRESS)
Access mdb have table named my_table with:
field1
field2
field3
i have same table named my_table in sql instance with same named record and same property of access mdb
i want to transfer all record from access table in sql db, record by record...
similiar:
rs.recorset1 of access in rs.recorset1 of sql db
rs.recorset2 of access in rs.recorset2 of sql db
rs.recorset3 of access in rs.recorset3 of sql db
...ecc
record by record becose during the export from access to sql i make various operation on single record...
View 1 Replies
View Related
Jul 23, 2005
Can someone explain what happens when two users concurrently attempt tocreate a new record in a table with an autonumber primary key? For example,user 1 creates a new record and manipulates it within a transaction makinguse (perhaps) of the @@IDENTITY value when creating other, related records.Before this transaction is complete, user 2 creates a new record and doesthe same thing. Presumably they will both have the same @@IDENTITY? Ifthis is the case, how is it possible to manage such a situation?Thanks.
View 2 Replies
View Related
Jan 13, 2007
Assumig i have acces my_db.md and my_mdb.mdf (in instace named DVD377-14D9E48CSQLEXPRESS)
Access mdb have table named my_table with:
field1
field2
field3
i have same table named my_table in sql instance with same named record and same property of access mdb
i want to transfer all record from access table in sql db, record by record...
similiar:
rs.recorset1 of access in rs.recorset1 of sql db
rs.recorset2 of access in rs.recorset2 of sql db
rs.recorset3 of access in rs.recorset3 of sql db
...ecc
record by record becose during the export from access to sql i make various operation on single record...
View 1 Replies
View Related
May 21, 2003
Hi,
When I open an application, it prompts me for a message that SQL is locked in exclusive mode by other application.
How to solve this?
thanks in advance
christine
View 3 Replies
View Related
Jan 30, 2004
Is there a way to do a logical exclusive OR (XOR) in sql server?
I'm trying to do this in where clause, something like:
WHERE
(not exists (select 1 from table a where a.date > '01/30/03') XOR
exists (select 1 from table a where a.date < '01/30/03'))
Thanks!
View 14 Replies
View Related
Jun 11, 2008
Hi,
How do you lock a table in exclusie mode before running a query?
thanks,
View 5 Replies
View Related
Oct 17, 2007
A problem about many to many relationships from an SQL beginner. Here's a contrived abstract example, as I'd prefer not to give away specifics.
Imagine I have two tables: users, food
The relationship (to like) is many-to-many so I've got a link table, which might look like the below:
andrew, apples
bob, banana
bob, apples
chris, carrots
chris, apples
chris, banana
I want to select users who like bananas and apples exclusively.
The answer should be 'bob' ONLY. select * from users inner join food on <IDs> where food in ('bananas','apples') isn't suitable , because it'll also return 'chris' who should be disqualified (because he also likes carrots).
Apart from potentially being bad DB design (although this is an abstract example; I do have ID numbers), can anyone suggest how to get this in a scalable way?
View 8 Replies
View Related
Mar 11, 1999
I can't delete records for a SQL Server table when I attached the table to Microsoft Access 97. I time out when I try to delete the record. However I can query the table.
I use the standard ODBC setup, do I need to do anything else beside using the standard Access link.
Thanks in advance
View 1 Replies
View Related
Jul 20, 2005
Anyone know if there is method that can insert all record from a tablein an MS Access 2000 database to a table in MS SQL Server 2000database by a SQL statement? (Therefore, I can execute the statementin my program)--Posted via http://dbforums.com
View 3 Replies
View Related
Oct 7, 2015
I have table contains more columns  and first column have ID  int not null primary key  and auto increment by 1 seed by 1 the ID 165000 record  and instant Jump to 166000 and increment by 1 ...
View 5 Replies
View Related
Aug 9, 2000
Anybody know how a SELECT statement can generate an exclusive lock on a table ?
I always thought that SELECT's take out shared locks. Is this something to do with temporary tables generated by ORDER BY's and DISTINCT ?
Rogue SQL below (from Site Server).
SELECT A.i_Dsid, A.i_Aid, A.vc_Val, A.i_Val, A.dt_Val, A.img_Val FROM Object_Attributes A, ( SELECT DISTINCT L.i_Dsid FROM Object_Lookup L , Object_Attributes OA2 (index = IND_vc_Aid) WHERE ((( L.i_ObjectClass = 9999 )) AND ( OA2.vc_Val LIKE ( '999999999.9999999%' ) AND OA2.i_Aid = 99)) AND (L.i_Container_Dsid = 99) AND ( OA2.i_Dsid = L.i_Dsid )) AS B WHERE B.i_Dsid = A.i_Dsid AND A.i_Aid NOT IN( 1, 2, 3, 4, 5 ) ORDER BY A.i_Dsid, A.i_Aid
Can anybody suggest a workaround ? Thanks.
View 2 Replies
View Related
Jan 4, 2008
Are Intent exclusive locks compatible with rowlock?
I am getting a deadlock since i have ix lock on a page and another process(select query) is trying to acquire a shared lock.How can i solve this?
View 3 Replies
View Related
Jun 29, 2004
I like to give First Name and Last Name in two different text box and then hit the delete button (command button). Then it will do a query to find the person and delete the corresponding record from the table. Any kind of help will be appreciated. Thank you.
View 1 Replies
View Related
Mar 27, 2014
I'm got a "folder" structure application which we'll be using as an in-house directory viewer. (In case you're wondering, it doesn't relate to any "real" folders, so using xp_cmdshell is out! )
Each folder and file record can have its own permissions, however these are assumed to inherit from the parent folder if no specific access rules have been set, basically in the same way file systems work. Each file record can only have one parent, and a folder can either have a parent or be at the root level.
Right now I'm having an issue with the inheritance of permissions. Say if I want to grant access to "Folder 1" to "Group A", then "Group B" shouldn't be able to see it. However, if I grant access to "File 1" in "Folder 1" to "Group B", then "Group B" should be able to see "Folder 1", but only see "File 1" and not the rest of the contents.
I thought I could do this with a CTE, but I'm having a bit of difficulty..
Here's the code:
CREATE TABLE #FileSystem (
FSIDINTEGER NOT NULL IDENTITY(1,1) PRIMARY KEY
,ParentFSIDINTEGER NULL
,NameVARCHAR(100)
,RecordTypeVARCHAR(1)-- (F)older, or Fi(L)e
[Code] ....
View 1 Replies
View Related
Feb 15, 2008
Hello
In our company, after switching to Office 2007, Access 2007 runtime is installed on our general user machines.
Everything is just fine and beautiful, except that there is one issue with runtime:
Several forms in my Access Project use stored procedures in SQL Server 2000 as their record source. When i try to open the forms in Access 2007 Runtime on user machines, i receive an error that "The record source dbo.Myprocedure speified on this form or report does not exist ".
I use dbo.ProcName format and the forms open correctly in my full version Access.
What could be the problem?
Thanks!
Elman
View 10 Replies
View Related
Sep 10, 2007
Hello All!
I want to perform 4 or 5 statements as a transaction but I need to make sure that during this complete transaction no one else inserts or deletes records from a table named SomeTable.
So how can I lock MyTable at the beggining of the transaction so that during my transaction no one else can insert or delete anything in table SomeTable?
Thanks!
David
View 9 Replies
View Related
