Sp_getapplock Behaviour After SP2
Mar 23, 2007
We have an application that executes a few queries against an SQL Server 2005 (64-bit) database. Since there can be several instances of the application running at any given time, and parts of the logic must be serialized, we've been using sp_getapplock and sp_releaseapplock. This has all been working fine since RC1 on which the system was released. However, after installing SP2 about a week ago, we have been having problems. The serialized portion of the code almost always stall now.
To see what is happening we've been using both Management Studio and Profiler. We have two applications running, let's call them A and B. Both create a prepared statement which begin with a call to sp_getapplock and ends with sp_releaseapplock. In between some tables are queried and inserts may be made in others. The accessed tables are never used anywhere else but in the serialized code. This is what is happening:
Application A: Calls sp_getapplock.
Application A: Queries a table.
Application B: Calls sp_getapplock.
Application A: Inserts a row in a table.
Application A: Calls sp_releaseapplock.
Application B: Waits indefinitely (or at least more than 4 hours, after which we killed the spid).
Profiler cannot detect any deadlocks when this is happening. There are no blocking operations according to Management Studio. I can see the application lock having been set when I look at the spid for Application B in Management Studio.
Since this started to occur frequently after installing SP2 and had not been seen before, we are wondering if any changes has been made that could cause this behaviour? Has anyone else had problems using application locks, where a query would stall indefinitely waiting for the lock to be released? How then did you resolve it?
Any suggestions or ideas are welcome,
Thanks,
Lars
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Dec 18, 2007
I have a problem , i use sp_getapplock to lock two queries in stored procedure.
When i test it from SQL server managment studio , it works fine.But when i call same stored procedure from my application (Using ADO ) it fails with exception text:"The statement or function must be executed in the context of a user transaction."
Can somebody exmplain me what does it mean?
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Oct 3, 2006
This is the actual statement displayed from Response.Write in classic ASP. INSERT INTO WOTasks (WoNum,TaskNum,TaskDesc,TaskMemo,Account,ModifyDate,Estimate,TaskHours,Unit,UnitCost,TotalCost) SELECT '06-012497',TaskNum,TaskDesc,TaskMemo,Account,'2006-Oct-3',1,TaskHours,Unit,UnitCost,TotalCost FROM Tasks WHERE procnum = '000002' There are 4 records returned from the SELECT part of the statement. In some situations, 4 records are inserted to WOTasks table, in others, only 1 record is inserted. I can't find out why 1 record, instead of 4, record is inserted. A form page submits the form to the save page using post method. The above statement is contained in the save page. When one of the form textbox is filled, 1 record is inserted. When the textbox is not filled, 4 records are inserted. You may think the textbox has something to do with the behaviour. I also think so but the content of the textbox does not affect the sql statement. In both cases, the insert statement is the same. In the actual codes, only strings in quotes are variables and the rest are hardcoded. When I run the statement in SQL Server, 4 records are affected. No such problem when connected with Access.The actual code belowSub AddTask(ByVal proc, ByVal wonum) Dim sSQL sSQL = "INSERT INTO WOTasks (WoNum,TaskNum,TaskDesc,TaskMemo,Account,ModifyDate,Estimate,TaskHours,Unit,UnitCost,TotalCost) SELECT '" & wonum & _ "',TaskNum,TaskDesc,TaskMemo,Account,'" & curDate & "',1,TaskHours,Unit,UnitCost,TotalCost FROM Tasks WHERE procnum='" & proc & "'" 'Response.Write sSQL:Response.End conn.Execute sSQL, , 128 End Sub
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Feb 24, 2004
Might be out to lunch, but I can't figure why this is being ordered the way it is:
SELECT '1' as t
UNION ALL
SELECT 'A' as t
union all
SELECT '['as t
ORDER BY t
I'd expect it to be 1, A, [ but instead it's [, 1, A [ is ascii 91 which is greater than both 1 and A, so why does it come first?
Karl
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Apr 13, 2006
Hi,
I am using MSDE and Analysis Services (lastest packs) and the same installation on the same machine has been working great for the last 18 months or so untill yesterday. Whenever I try to open a DTS (in order to edit it) the machine just goes into a coma.... I have tried to re-start many times but of no use.
Can someone kindly guide me what should I look for in order to solve this.
I will be very grateful for your help.
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Jul 5, 2004
When I run the command:
exec master..xp_cmdshell 'NET USE'
from the analyzer the box responds there are no entries in the list.
After that, I run the command:
exec master..xp_cmdshell 'NET USE Z: /DELETE'
after which the box responds with a "network connection could not be found."
and that's all okay.
The weird thing is:
exec master..xp_cmdshell 'NET USE Z: \MACHINESHARENAME'
results in a "The local device name is already in use.".
The machine in this particular case is the box itself. I have no problem accessing other disks on other systems. I can see the share using the view command. There's no maximum on the share itself and I can connect to the share using another sql box with the same user.
I don't know why it won't budge, worked before like a charm. After six months or so it just stopped. Anyone seen/solved this behaviour?
thanx,
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Dec 2, 2005
Hi there,
I wonder if one of you worthy folks can help me out with some strange behaviour exhibited by a piece of SQL. Its my first post here , so please be gentle. :)
Here is my simple example :-
<my test table>
create table test
(ind int,
message varchar(255))
insert into test (ind, message) values
(1,'date=01/06/2006')
insert into test (ind, message) values
(1,'date=20/12/2005')
insert into test (ind, message) values
(2,'test')
The first query is
select * from test t1
where t1.ind in (select max(ind) from test t2
where t2.ind = t1.ind
and t2.message like 'date=%' )
fine.... 2 rows
second query
select * from test t1
where t1.ind =1
and convert(datetime, (SUBSTRING(Message, CHARINDEX('=',Message,0)+1, 10)),103) > getdate()
fine same 2 rows...
but If I try to combine the 2 clauses in
select * from test t1
where t1.ind in (select max(ind) from test t2
where t2.ind = t1.ind
and t2.message like 'date=%' )
and convert(datetime, (SUBSTRING(Message, CHARINDEX('=',Message,0)+1, 10)),103) > getdate()
I get a
Server: Msg 241, Level 16, State 1, Line 1
Syntax error converting datetime from character string.
Please can anyone help me on this?
thanks
Simon
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Jul 23, 2005
Hello All,The following script is reproducing the problem assuming you haveNorthwind database on the server.Please note it gives you the error message on line 12.USE tempdbGOsp_addlinkedserver 'Test17'GOsp_setnetname 'Test17', @@SERVERNAMEGOIF EXISTS (SELECT 1 FROM dbo.sysobjects WHERE id =object_id(N'[dbo].[This_works]') and OBJECTPROPERTY(id, N'IsProcedure') = 1)DROP PROCEDURE [dbo].[This_works]GOCREATE PROCEDURE This_works@UseLinkedServer bit = 0-- WITH RECOMPILE -- Does not helpASSET NOCOUNT ONIF @UseLinkedServer = 1 -- Linked ServerBEGINIF EXISTS (SELECT 1 FROM dbo.sysobjects where id =object_id(N'[dbo].[Orders_TMP]') and OBJECTPROPERTY(id, N'IsUserTable')= 1)DROP TABLE dbo.Orders_TMPSELECT * INTO dbo.Orders_TMP FROM Test17.Northwind.dbo.OrdersENDELSE -- LocalBEGINIF EXISTS (SELECT 1 FROM dbo.sysobjects where id =object_id(N'[dbo].[Orders_TMP]') and OBJECTPROPERTY(id, N'IsUserTable')= 1)DROP TABLE dbo.Orders_TMPSELECT * INTO dbo.Orders_TMP FROM Northwind.dbo.OrdersSELECT 1 FROM dbo.Orders_TMP WHERE 1 = 2 -- Why do I need this line?ENDBEGIN TRANSACTIONSelect 'Line 25'SELECT COUNT(*) FROM dbo.Orders_TMPCOMMITgoIF EXISTS (SELECT 1 FROM dbo.sysobjects WHERE id =object_id(N'[dbo].[This_does_not]') and OBJECTPROPERTY(id,N'IsProcedure') = 1)DROP PROCEDURE [dbo].[This_does_not]GOCREATE PROCEDURE This_does_not@UseLinkedServer bit = 0-- WITH RECOMPILE -- Does not helpASSET NOCOUNT ONIF @UseLinkedServer = 1 -- Linked ServerBEGINIF EXISTS (SELECT 1 FROM dbo.sysobjects where id =object_id(N'[dbo].[Orders_TMP]') and OBJECTPROPERTY(id, N'IsUserTable')= 1)DROP TABLE dbo.Orders_TMPSELECT * INTO dbo.Orders_TMP FROM Test17.Northwind.dbo.OrdersENDELSE -- LocalBEGINIF EXISTS (SELECT 1 FROM dbo.sysobjects where id =object_id(N'[dbo].[Orders_TMP]') and OBJECTPROPERTY(id, N'IsUserTable')= 1)DROP TABLE dbo.Orders_TMPSELECT * INTO dbo.Orders_TMP FROM Northwind.dbo.Orders--SELECT 1 FROM dbo.Orders_TMP WHERE 1 = 2 -- Why do I need this line?ENDBEGIN TRANSACTIONSelect 'Line 25'SELECT COUNT(*) FROM dbo.Orders_TMPCOMMITGOPRINT 'This_works'EXECUTE This_works 0PRINT ' 'PRINT 'This_does_not'EXECUTE This_does_not 0Thanks for any help or hint,Igor Raytsin
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Feb 17, 2006
I were trying to achive paging through using a CTE etc, but ran into the following weither thing happening. The CTE allows me to use avariable as the ORder By field, although the CTE do not care at all what is in there? Have any one seen this or maybe can explain this?
USE AdventureWorks;
GO
DECLARE @SortExpression Varchar(50)
Set @SortExpression = 'SalesPersonID ASC';
WITH Sales_CTE (RowNumber, SalesPersonID, NumberOfOrders, MaxDate)
AS
(
SELECT
ROW_NUMBER() OVER(Order by @SortExpression) RowNumber,
SalesPersonID, COUNT(*), MAX(OrderDate)
FROM Sales.SalesOrderHeader
GROUP BY SalesPersonID
)
Select * From Sales_CTE;
WITH Sales_CTE1 (RowNumber, SalesPersonID, NumberOfOrders, MaxDate)
AS
(
SELECT
ROW_NUMBER() OVER(Order by SalesPersonID ASC) RowNumber,
SalesPersonID, COUNT(*), MAX(OrderDate)
FROM Sales.SalesOrderHeader
GROUP BY SalesPersonID
)
Select * From Sales_CTE1
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Nov 20, 2007
When I run the package from business solution environment, DBdate cast converts my date column (correctly) into a European date format dd/mm/yyyy and as such is inserted into sql server table.
When I run a package as a job, the same date in inserted into the database as mm/dd/yyyy.
So, if I have 3rd January 2007 in the source, in the first case i'll find 03/01/2007 in the database.
When I run the package as a job, I find 01/03/2007 in the db.
The problem comes when I run different select statements - the 01/03/2007 behaves as if 1st March 2007
How can I avoid inserting of American data format into the db?
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Aug 8, 2007
Hi,
In My report I have 2 drop down list called Cusip and Period as parameters and they are populated using a sproc
I have a list and in my list i have 2 textboxes which have the value First(Fields!FundNameNoFee.Value) and First(Fields!FundDescription.Value)
The Cusip drop list has the following values <All Cusips> whchi takes the Value Null, 33335454, 115544454.
If i give all cusips in preview mode Nothing populates in the report, but i just run the dataset i get 2 records with 33335454,1155445454.
and if i give individual cusip, the data shows up in the report...
So can some one tell me how can i show the values on the reports when All Cusips are selected....
Regards
Karen
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Oct 11, 2007
Hi to all!
i had tried to install ads on a windows 5. i am able to connect to the pocket database. however when i trie to connect to the database that's on desktop i see a little window (probably a message) without anything and when i tap ok i see a message telling that the connection to the desktop database was not done! i had made the configuration before.
can you tell me what is going wrong?
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Jan 22, 2008
I'm trying to use SetRange method on a table with multi-columns index, but I didn't get the result I was hoping for from the query.
Here is the DDL for the table
Code Block
CREATE TABLE [Products] (
[ProductId] INT IDENTITY(1,1) NOT NULL ,
[ArrivalDate] DATETIME ,
[Name] NVARCHAR(100) ,
[CategoryId] INT,
CONSTRAINT [PK_Products] PRIMARY KEY
(
[ProductId]
)
)
;
CREATE INDEX IDX_ProductArrival
ON [Products]
([ArrivalDate], [Name], [CategoryId])
;
--insert some sample data
Insert into [Products] ([ArrivalDate], name, categoryid) values ('2008-1-22 13:00:00', 'PC 1', 1);
Insert into [Products] ([ArrivalDate], name, categoryid) values ('2008-1-22 13:00:00', 'PC 2', 2);
Insert into [Products] ([ArrivalDate], name, categoryid) values ('2008-1-22 13:00:00', 'PC 3', 3);
And here is the code I'm using
Code Block
using System;
using System.Data.SqlServerCe;
using System.Data;
namespace ConsoleApplication1
{
class Program
{
static void Main(string[] args)
{
using (SqlCeConnection conn = new SqlCeConnection(@"data source=d:mydb.sdf"))
{
conn.Open();
int counter = 0;
using (SqlCeCommand cmd = new SqlCeCommand("products", conn))
{
cmd.CommandType = CommandType.TableDirect;
cmd.IndexName = "IDX_ProductArrival";
object[] start = new object[3];
object[] end = new object[3];
start[0] = new DateTime(2008, 1, 22, 0, 0, 0);
start[1] = "PC 2";
start[2] = 2;
end[0] = new DateTime(2008, 1, 22, 23, 59, 59);
end[1] = "zzzzzzzzzzzzzzz";
end[2] = 3;
cmd.SetRange(
DbRangeOptions.InclusiveStart | DbRangeOptions.InclusiveEnd,
start, end);
using (SqlCeDataReader reader = cmd.ExecuteReader())
{
while (reader.Read())
{
counter++;
}
}
}
conn.Close();
Console.WriteLine("Row count {0}", counter); //should show row count 2 but shows row count 3 instead
}
Console.ReadKey();
}
}
}
I'm setting the starting range to a date and a product name (PC 2) but it seems that the datareader only see the first array member and completely ignore the product name and show all 3 data instead of 2.
Am I missing something here?
Thanks
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Oct 25, 2007
We have this webiste which uses SQL express as database engine. Sometimes certain features of the website stop working. Like membership provider and other database related things. I have described the problem in more details here: http://forums.asp.net/t/1172253.aspx
In consice the problem is: One query with fixed inputs does not always return the same results, though the data has not changed, you restart the SQL express and the problem resolives!
I think thats a problem with SQL express, because when you restart SQL express everything starts working. Our database is kinda big. Like above 500 MB with up to 50 concurrent users. And our machine got a 3.2 CPU with 512 MB of ram. And our application is the only application runing there.
What do you think please?
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Aug 12, 2000
Hi...
Not sure what's wrong with the query or table, but I just can't get the result I want.
The column is varchar(35) and contains toll free no, like 18001234567...
But when I queried using the query below, I can't get any results. Same if I use 1*, 18*, 180*...
SELECT ... FROM ...
WHERE CONTAINS(toll_no, '"1800*"')
However, if I used 18001* I do get results.
Can anybody show me how to get result for these cases?
Thanks.
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Oct 12, 2000
I have a scheduled job that inserts some records into a table. It fails with the following message,
Violation of PRIMARY KEY constraint 'PK_FuturesOut'. Cannot insert duplicate key in object 'FuturesOut'. [SQLSTATE 23000] (Error 2627) The statement has been terminated. [SQLSTATE 01000] (Error 3621). The step failed.
The strange thing about this is, if I copy the SQL statement from the job and paste it into Query Analyzer, it works without any modifications.
If anyone can explain this I would be most grateful.
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May 12, 2006
Hi
If I have a view:
SELECT A,B
FROM tblTable
WHERE A = 1
And then I have a s-proc using that view:
SELECT *
FROM MyView
WHERE B > 6
My question: If I add an index to tblTable for the column B (not used in the view's WHERE clause, but used in the s-proc), will it have a performance improvement, because of the WHERE B > 6 on the view, assuming that this condition would benefit from the index if it were in the view itself.
I guess I could also put it this way: can an index on a column in a table improve the performance of a condition on a view using that table.
Thanks
Peter
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Aug 3, 2007
I use bcp fairly often in SQLServer2000 but have never run across this before. In a 512 SQLCHAR column containing notes, when two spaces are encountered (i.e. ' '), bcp is replacing ' ' with '
'.
I figured it was a problem with my format file, but I have not found enough specific info on the MSDN site to resolve this.
This is my bcp command:
bcp "SELECT DivCode,CommCode,ContactID,substring(Notes, 0, 512) from frep.dbo.BeBackExtract" queryout "D:BeBackDetail.dat" -f "D:BeBackDetail.fmt" -e "D:BeBackDetailErrors.dat" -U user -P pass -S server
And format file:
8.0
4
1 SQLCHAR 0 2 "" 1 DIVCODE ""
2 SQLCHAR 0 3 "" 2 COMMCODE ""
3 SQLCHAR 0 10 "" 3 CONTACTID ""
4 SQLCHAR 0 512 "
" 4 NOTES ""
Has anyone seen this?
Incidentally I also tried using the REPLACE function which seems to work great until trying to replace 2 spaces with 1 space, in which case it doesn't do anything.
Thanks for any ideas -
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Apr 20, 2004
Hi all
I have a DTS package that users of the database can run which basically acts like a 'live update' (as the database is based on a values produced from another system) and it takes roughly 30 or so seconds to run...
The dts package is not going to have a particularly large hit rate but i am interested in knowing what will happen if a user (user 1) attempts to run the package when it is in already in use by another user (user 2) ?
Will User 1 simply have to wait untill the package completes for User 1?
OR
Will a new seperate 'instance' of the package be used by User 1?
Any info would be very helpful
Cheers
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Apr 13, 2007
Hi
Just tried to Run the Following statement in Query Analyzer
Select convert(varchar(9),convert(integer,1234567890))
The Output was an * (asterisk)
Can Some one Explain Y??
Thanks in advance
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Jul 23, 2005
Hello all,I have what I hope is a simple question:Does SQL Server have an 'all-or-nothing' locking policy? Or does itacquire as many locks as it can and then sit and wait for the rest?Example:SELECT * FROM TABLE_A INNER JOIN TABLE_BON TABLE_A.dbid = TABLE_B.dbidNormally a SHARED lock would be acquired on both objects (pleasecorrect me if I'm wrong). But let's say TABLE_B was being updated byanother process at the same time, and so we couldn't get the sharedlock. Would the dbms go ahead and acquire the shared lock on TABLE_Aand then wait for the other lock, or would it not acquire any lock atall until locks on both TABLE_A and TABLE_B were available?I ask because I'm investigating a deadlocking problem that's drivingme mad :)Thanks,Tommy.
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Jul 20, 2005
Hi,In order to establish a security enhanced SQL server setup, I triedto switch off network access by disabling all networking protocols,so that the server can only be reached through a pipe. Neverthelessthe server was visible in the network and could be accessed fromall clients. Does anybody know what is going on here?Georg
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Jul 20, 2005
Hi Everybody,I have a complex view, that includes a "group by" clause. I'm tryingto join this view with a table, in a very simple query.The problem is that the optimizer is not using the table data as inputfor the view (I expect this because I have arguments for the table,but not for the view), but executing the view in a different step andthen joining to the table by a merge/hash join. This is obviously veryslow.I tried to force nested loops by using hints but it still doesn't usethe table data as input.Has anybody ever seen this?Thanks in advance...
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Nov 14, 2006
Hi everyone,
I wonder if it's possible keep the connections previously opened in your Sql Management Studio.
I mean, I open it and connecting to sql1,sql2,sql3,etc.. without using queries or something like that and then, close and re-open again. What happens? Neither of them appearing again. If you create a project, of couse...but it's not the same, because when you create a .ssmssln project file is inteded for keep .Sql.
I'm talking about the same behaviour when you ran the old Enterprise Manager inside the Microsoft Management Console and you had the possibility of make groups and whatever.
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Sep 20, 2007
I have 2 exact same sql tasks in different packages. Connection manager is defined for the same database for both. one of the sql task works, and other one throws out this error:
[Execute SQL Task] Error: Failed to acquire connection "pdsprod.pdsdataread". Connection may not be configured correctly or you may not have the right permissions on this connection.
this is completely mind boggling. I have compared both sql tasks for each and every property and they are exactly the same. what is going on?
by the way I am on 64 bit box with Run64bitruntime= false.
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Nov 15, 2006
Hi,
I am seeming strange results with a query. I have two tables, lets call them Table1 and Table2. Table1 has an ID field, Table2 does not have an ID field. To be sure I wasn't blind, the query
'SELECT ID FROM Table2'
returns: Invalid column name 'ID'. OK. Now when I run the query
'SELECT * FROM Table1 WHERE ID IN (SELECT ID FROM Table2)'
it returns all the records from Table1.
What gives? Is this a bug, or am I missing something?
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Nov 25, 2007
Hi
It may be the stupid mos question but i am stucked badly.
I am having data like this.
Table 1
Table 2
data
data
data
data
Now i am performing a outer join like
select * from table 1
full outer join table2
on table1.data=table2.data.
What output i am expecting is
Table 1
Table 2
data
data
NULL
data
NULL
data
But output i am getting is
Table 1
Table 2
data
data
data
data
data
data
Could you guys please help me in getting desired result in optimum way?
Thanks a lot in advance.
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Aug 31, 2007
I am facing a strange problem.
SSIS is executing a piece of code which is inside comment !!!
I have got a master package which executes number of other packages. When I right click on a package and click "Execute task", SSIS respects the comments and ignores code inside it.
But when I execute master package, SSIS executes piece of code which is inside comment!!!
The only thing I can think of is when executed from Master package, SSIS somehow picks very old precompiled binary. BTW, precompile=false for the script component so it shouldn't use precompiled binary at all.
I am sure it will be fixed if I delete and recreate this particular script component with the same script. I (luckily!) picked up this problem but the thought of SSIS not executing intended binary scares the hell out of me.
Any thoughts??? or its just me happened to be using SSIS on Friday?
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Mar 13, 2008
I am using SQLExpress for Unit Testing my application. In the Unit Tests, I use a local database file that is attached automatically in SQLExpress when the Unit Test uses it.
FYI, in the Unit Test I use the following connection string :
"Data Source=.SQLEXPRESS;AttachDbFilename=|DataDirectory|MyUnitTestDatabase.mdf;Integrated Security=True;User Instance=False;Pooling=false"
By accident, the MyUnitTestDatabase.mdf file was marked as ReadOnly. So, after executing several times the unit Test, the attached databases appear in grey in the SQL Server Management Studio Express. That's normal ! The problem I want to report here occurs when I execute the following script in SQL Server Management Studio Express:
use master
go
sp_MSForEachDB 'Print ''?'''
go
In .SQLExpress, I currently have 8 databases (The three last databases are those attached by the unit tests. They are ReadOnly):
- master
- model
- msdb
- tempdb
- MyUnitTestDatabase (the original db copied and used by the Unit Tests. It's not ReadOnly)
- 1E6AA4A60F3733D37F016842D4626B8B_X34058MYSERVICETESTRESULTSX34058_N17400 2008-03-12 17_22_03OUTMYUNITTESTDATABASE.MDF
- ADA9F382DFBC95C8334EF95336C98274_X34058MYSERVICETESTRESULTSX34058_N17400 2008-03-12 17_13_57OUTMYUNITTESTDATABASE.MDF
- F00BF38C8BB8F07D37FCC4E918CF815E_X34058MYSERVICETESTRESULTSX34058_N17400 2008-03-12 17_10_04OUTMYUNITTESTDATABASE.MDF
When executed, the script mentioned above displays sometimes all the databases and sometimes only the 4 first databases ?!?!
I did a demo to various colleagues here, pressing F5 many times in the Script windows. It's seems taht it displays 4 names or 8 names "at random"... (I always wait for the message "Query executed successfully" before pressing again F5).
I have to understand the problem here because I use sp_MSForEachDB to detach all the databases at the end of the Unit Tests and it also fails from time to time...
Thx in advance for any tip that could help me in finding the origin of this problem
V.
PS. : FYI, here is the stored proc I use to automatically detach the databases at the end of the unit tests
declare @spid int
declare @killstatement nvarchar(10)
IF @database like '%TESTRESULTS%'
BEGIN
-- Declare a cursor to select the users connected to the specified database
declare c1 cursor for select request_session_id
from sys.dm_tran_locks
where resource_type='DATABASE' AND DB_NAME(resource_database_id) = @database
open c1
fetch next from c1 into @spid
while @@FETCH_STATUS = 0
begin
-- Don't kill the connection of the user executing this statement
IF @@SPID <> @spid
begin
-- Construct dynamic sql to kill spid
set @killstatement = 'KILL ' + cast(@spid as varchar(3))
exec sp_executesql @killstatement
end
fetch next from c1 into @spid
end
close c1
deallocate c1
exec msdb.dbo.sp_delete_database_backuphistory @database
exec master.dbo.sp_detach_db @database, 'true'
END
END
Possibly I was not detaching the databases in a "clean way" and my system databases are now corrupted ? Is such a case, what should I do in addition to the code here above to correctly detach the databases ?
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Mar 27, 2007
Hi all,
I'm encountering a weird behaviour:
I have a .NET application that should allow to select Server and Catalog to install a DB.
I create a mask similar to the one in SQL Server, so i have to fill the Server DropDownList.
This is my code:
SqlDataSourceEnumerator instance = SqlDataSourceEnumerator.Instance;
System.Data.DataTable table = instance.GetDataSources();
foreach (System.Data.DataRow row in table.Rows)
{
string strDBName, strInstance = row[1].ToString();
if ((strInstance == null) || (strInstance == ""))
strDBName = String.Format("{0}", row[0]);
else
strDBName = String.Format("{0}\{1}", row[0], strInstance);
Program.WriteLog("Row: " + row[0] + ", " + row[1] + " (" + row[3] + ")");
}
Program.WriteLog just writes a string on the log file
Sometimes I need to restart the SqlServer so I Run
CtrlDatabase = new ServiceController(strServiceName);
CtrlDatabase.Stop();
CtrlDatabase.Start();
With the obvious checks
Well the first time, before restarting, the log file is
Row: WKS08, COMPACS (8.00.194)
However if i run Stop & Start the log file is
Row: WKS08, ()
SqlDataSourceEnumerator seems to be not more able to read data.
Why? How can i fix it?
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Feb 21, 2008
I have the following bit of code that is an onclick event to save information in text boxes and list boxes. I cut out a bunch that was irrelevant to this because ALL items in the text boxes save fine. My biggest question that should lead to the answers for the rest of the code, is for lines 53-57... That stored proceedure does not appear to run. All it is set to do is and the code is DEFINITELY getting passed into it but it almost seems like it isnt and therefoe isnt doing anything. I get no errors, just nothing happens. I would of thought at the very least, it should run this proceedure and delete the information from the table even if it wouldnt save the new information based on the listboxes.
I am not sure if I am explaining this correctly, but if anyone has any thoughts, I would greatly appreciate it.
The delete proceedure that isnt actually making a changeALTER PROCEDURE [dbo].[Delete_Team_Data]
(
@Code as int
) AS
DELETE from tblSectyData2 where Code = @Code
DELETE from tblSectyData2 where SectyCode = @Code
The actual code
1
2
3 protected void SaveChanges(object sender, EventArgs e)
4 {
5
6 string selectedEmployee = "";
7 selectedEmployee = EmployeeList.SelectedValue;
8
9
10
11 string fName = "";
12 //Snipped out a bunch of code relating to the text boxes
13 string secretaryCode = "";
14
15 fName = txtFName.Text;
16 //Snipped out a bunch of code relating to the text boxes
17 secretaryCode = TeamList2.SelectedValue.ToString();
18 int selemp = Convert.ToInt32(selectedEmployee);
19
20
21
22
23 String Conn = (string)Application["Facebook"];
24 SqlConnection IntranetConnection;
25 SqlDataReader IntranetReader;
26 IntranetConnection = new SqlConnection(Conn);
27 //SaveEmpChanges works properly.
28 SqlCommand SaveEmpChanges = new SqlCommand("Exec dbo.Edit_Employee_Data '" + prefix + "','" + lName + "','" + fName + "','" + mName + "','" + pos + "','" + dept + "','" + directdial + "','" + ext + "','" + fax + "','" + hphone + "','" + cphone + "','" + partner + "','" + timekeeper + "','" + notary + "','" + practice + "','" + saddress + "','" + sphone + "','" + lnl + "','" + bar + "','" + oemail + "','" + haddresscom + "','" + haddress + "','" + hcity + "','" + hstate + "','" + hzip + "','" + school + "','" + degree + "','" + status + "','" + floor + "','" + code + "','" + email + "','" + language + "'", IntranetConnection);
29 //Delete Team does NOT work
30 SqlCommand DeleteTeam = new SqlCommand("Exec dbo.Delete_Team_Data '" + selemp + "'", IntranetConnection);
31 //GetEmployeeType does work
32 SqlCommand GetEmployeeType= new SqlCommand("Select EmpType from tblMain2 where Code = '" + selectedEmployee + "'", IntranetConnection);
33
34 IntranetConnection.Open();
35 IntranetReader = SaveEmpChanges.ExecuteReader();
36 IntranetReader.Close();
37 IntranetConnection.Close();
38
39
40
41
42 int count = 0;
43 string LinkT = "";
44 string LinkT2 = "";
45
46 string etype = "";
47
48 lselemp.Text = selectedEmployee;
49 //Basically, while the page loads fine, it does NOTHING below this line... Ive comments out sections, I have also put in a bunch of labels in to show the variables being passed, it all seems fine.
50
51
52
53 IntranetConnection.Open();
54 IntranetReader = DeleteTeam.ExecuteReader();
55 IntranetReader.Close();
56 IntranetConnection.Close();
57
58
59 IntranetConnection.Open();
60 IntranetReader = GetEmployeeType.ExecuteReader();
61 while (IntranetReader.Read())
62 {
63 etype = IntranetReader["EmpType"].ToString();
64 }
65 IntranetReader.Close();
66 IntranetConnection.Close();
67
68 int end = Convert.ToInt32(TeamList2.Items.Count);
69 string teamcode = "";
70
71 while (count < end)
72 {
73
74 teamcode = TeamList2.Items[count].Value.ToString();
75
76 if (etype == "S")
77 {
78 LinkT = "Secretary";
79 LinkT2 = "Works with";
80 }
81
82 else if (etype == "O")
83 {
84 LinkT = "Works with";
85 LinkT2 = "Secretary";
86 }
87
88
89
90 //This command does not work
91 SqlCommand saveTeam = new SqlCommand("Exec dbo.Add_Team_Data '" + selemp + "','" + teamcode + "','" + LinkT + "','" + LinkT2 + "'", IntranetConnection);
92
93
94 IntranetConnection.Open();
95 IntranetReader = saveTeam.ExecuteReader();
96 IntranetReader.Close();
97 IntranetConnection.Close();
98
99
100 count++;
101 }
102
103
104
105
106 Response.Redirect("ManageEmployeeDirectory.aspx");
107 }
108
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Jun 4, 2008
Hi all,
I want to share an experience I made in the last few days and like to hear your comments about it. I am developing an ASP.Net 2.0 Web Application using SQL Server 2005 on my local system. After implementation was done, I had to deploy the application to the production server. Because of license problems, on the server is the express edition of SQL Server installed. The system worked fine for about 2 month. But the last week we noticed, that there was deadlocks in the application. After searching a while I noticed, that there were a lot of open connections. When you open SQL Server Management Studio and look at Management > Activity Monitor, you can see all opened connections in the connection pool.
So the problem was, that with every request, a new connection was created, instead of using the existing ones, even if the state of the connections was sleeping. On SQL Express, if a specific limit of connections is reached, it'll wait for a connection to be released, but there is no release, so it threw a timeout error. But suprisingly, on SQL Server there also were a lot of connections created, but there were never a deadlock, which I can't explain. Also I can't explain, why it also worked for 2 months on SQL Express.
The architecture:
I have data classes, which are implementing IDisposable. In the dispose method, I call Dispose on the connection and set it to null. And in code I instanciate my data classes in using blocks. So on reaching the end of the using block the data class instance is disposed. In the dispose method the connection is disposed. So I thought, that everythink will work fine, but it doesn't.
The problem was solved by calling Close() on the connection in the Dispose method in my data class just before calling conn.Dispose().
So does this make sense to you? The fact, that it solved my problem lets me believe to that solution, but I can't really say why. So if you have any ideas or knowledge, I'd love to hear it.
Regards,
Koray
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Feb 27, 2002
Strange MS Access behaviour! URGENT please!!
We have a view looking at all the columns of a table on a SQL server 7.0 db. When we link this view to MSAccess, we are seeing the old data which was there previously in the original table! not the latest data. We recompiled the table and views and also re-linked the view to MSAccess with no help,we still see the old data only.This is happening only for one of the views not for all.Any help???
sa.
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