Set New_broker When The Activated Stored Procedure Changes.

Sep 4, 2007

Hi I have a couple of questions to understand better Service Broker..

Every time I alter the activation Stored Procedure on the receiving queue I also execute the:
alter database set new_broker rollback

1) can somebody explain me in a detailed way why I have to do that? what happen inside SQL Server when there is a Stored Procedure activated on a queue??
Also link to white papers, resouces on so on are appreciated.

My Activation Stored Procedure calls other stored procedure.
2) If ONLY one of the nested stored procedures changes I have to execute the command:
alter database set new_broker rollback ???

I think that the answer to the first question will answer the second one..

Thank you for any helps!
Marina B.

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Stored Procedure Activated More Than Once

Nov 23, 2006

Hi guys!

Is it possible for a stored procedure to be activated more than once even if a message is sent only once? After sending the message, I check the sys.dm_broker_activated_tasks and see that it activates more than once. Is there a way for me to prevent this from happening?

Thanks a lot! :)

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Jan 11, 2007

Hi

I'm having a problem debugging (with VS2005,) a CLR Stored Procedure which is activated on a queue. I know it is working because it is consuming and processing messages when one appears in the queue.

I can debug it 'manually' by either right-clicking on the SP within VS2005 and selecting 'Step into Stored Procedure' or by attaching to the SQL Server Management Studio process, setting a breakpoint and executing the stored procedure from a Management Studio query window.

However, if I send a message to my queue within Management Studio, my breakpoints are NOT being hit within VS2005, but the message IS reaching my queue and it IS being processed by the SP.

Can anyone help?

Thanks

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Apr 26, 2006

I've read Remus' article on Fire and Forget tactics when it comes to ending conversations, and I have to admit I am guilty of sending a message to a service and immediately ending the conversation. I've set up a stored procedure to end the conversation on the initiator queue, but I'm guessing it's never being fired because I am not ending the conversation in the target activated stored proc, which is a CLR stored proc.

Can you tell me how to end the conversation from a CLR stored proc?

Now that I think of it none of the code I use in my TSQL activated stored procs to handle different message types and error-checking is done in the CLR stored proc.

Thanks

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Dec 1, 2006

I have a initiator and a target service broker peer.

Both are controlled by a C# unit test. The initiator uses the Microsoft.Samples.SqlServer class. The target service uses stored procedure activation.

Sending a message from the initiator to the target, saves the content of the message, along with its conversation handle in the target's database specific table.

The unit test needs - at a later time - to instruct the target to send a message back on the same conversation handle to the initiator service.

For this the C# unit test creates a Conversation off of the saved conversation handle:


Service client = new Service("cleintservicename", conn, tran);

Conversation dialog = null;

dialog = new Conversation(client, convHandle);
Sending the message on this dialog generates an error "Message body: <Error xmlns="http://schemas.microsoft.com/SQL/ServiceBroker/Error"><Code>-8495</Code><Description>The conversation has already been acknowledged by another instance of this service.</Description></Error>".
Is the error due to the fact that a service - using the activated stored procedure already picked up the conversation, so that a new reference to the service can not be created through the Service class in CLR?
If so, I might need then to skip the activated stored procedure in favor or a CLR service, alltogether?
Any help - greatly appreciated.

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Jul 16, 2005

I have a stored procedure into which a bit type of parameter called '@activated' is being passed. This stored procedure gets all the users matching the condition :
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In users table, one of the columns is 'Activated' of bit type.
The strange thing happening here is that if @activated is null, then the above condition is true for all rows in users table, even though we know that the column Activation  is either 1 or 0 only and never -1.Can someone explain why this strange thing is happening?

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Aug 2, 2006

Hi There

2 Questions :

1. Almost in every SB example you will see this sql :

BEGIN TRANSACTION

WAITFOR (

RECEIVE TOP (1)

@MessageType = message_type_name,

@Message = message_body

FROM [Queue1]

WHERE conversation_handle = @ConversationHandle

), timeout 5000;

If this sql in an activated sp do you really have to have the waitfor ? Since the sp will only be fired if there is a message on the queue ?

2. It is reccomended that for high volume SB apps you do not do a top(1) receive but process batches. Exactly what is the best practice to do this. Receive a batch into a table variable and then what ? Process through it with a cursor ? That is not very efficient either, i would just like some insight into batch queue processing as everywhere i have seen uses top (1) from the queue ?

Thanx

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Activated Stored Proc Blocking?

Aug 24, 2006

Hi There

I was wondering, i have experienced alot of stored procedure blocking where you have a stored procedure that get executed very frequently and is complex, when the sp has to recompile it is locked and cannot be executed by other processes.

How will this work with an activated stored procedure, our activated stored procedure will probably not be too complex but it may exec complex ones base on the message type.

Now lets say that a message is recieved by the activated sp he in turn executes a complex sp to process the message this causes the complex sp to recompile, during this time another activated sp is spawned by the queue with the same message type he execs the same complex sp that is busy recompiling, i presume that the second activated sp will be blocked until the sp has completed recompiling.

Is this correct, because on a very busy queue with very complex sp's being called by the activated stored procedure, the benefit of having multiple queue readers is negated by the blocking caused by the recompiling sp's called by the activated sp.

Basically no matter how many queue readers kick in to handle the messages they all wait for the sp to recompile from the first message.

I am hoping multiple spawned activated stored procedures somehow over come this? Or work differently somehow.

Does anyone know ?

Thanx

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Oct 23, 2006

I have an activated SP that is issuing PRINT statements.

These are raised as ErrorLog and EventLog events when using SQLProfiler

However if you attach an event notification for ERRORLOG and EVENTLOG, nothing appears in the queue. Any other ERRORLOG or EVENTLOG event caught by profiler is caught by the event notification as expected.

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Oct 19, 2006

Hi everyone! Good day!

I'm not really sure if my question should fall on Service Broker or T-SQL, but I hope someone helps me with this... After activating the stored procedure assigned to the queue, is there any way for me to find out if the stored procedure is already finished executing?

I have successfully sent messages to my queue but I have no way to know if all the processing is already done.

Thanks so much!

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Mar 7, 2008

Hi,

I am getting deadlock on activated procedure which I am using to receive message from the Service Broker Queue.

Deadlock details:

Two threads are tring to do delete on internal table queue_messages_122847900 ends up in a dead lock.

Activated procedure code

RECEIVE TOP(1) @xmlMessage = message_body,
@handle = conversation_handle,
@message_type = message_type_name
FROM TransactionQueue;

IF (@message_type = 'http://schemas.microsoft.com/SQL/ServiceBroker/EndDialog')
BEGIN
END CONVERSATION @handle;
RETURN 0
END
.........................
.........................
After this I do process the message and some other processing

And then

END CONVERSATION @handle;

Note I do have single conversation group

Is their a problem in the way I am receiving and processing messages. Is it possible because of the delay between RECEIVE and END CONVERSATION same message is read by two different threads.

Thanks

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Feb 7, 2007

SQL Version - SQL Server 2005 Standard Edition, SP 1

I have a database which is Broker Enabled. We use Query notification extensively and the application is in testing stage. Both Testing and development database is on the same server. When I create database for testing I used to do Backup-restore method. When i restore a borker enabled database, the restored database and the source database will have same GUID for Broker. So by default the restored database will not be broker enabled. So what I do is , i run

Alter database somedatabase SET NEW_BROKER.

This statement will generate new GUID for this database and then we can enable the Broker by SET ENABLE_BROKER statement. Till last week this process was working fine. When I did the same thing yesterday the Alter database somedatabase SET NEW_BROKER query was runing for whole night and it could not complete the process.
What SET NEW_BROKER internally does as per BOL is

NEW_BROKER
Specifies that the database should receive a new broker identifier. Because the database is considered to be a new service broker, all existing conversations in the database are immediately removed without producing end dialog messages.
When I checked the Conversation in the database there were millions of rows.
My question is , can I do the same process in a better way and how. Is there any way to clear Conversation in a faster method. I googled , but I could not find a better solution.


pse help

Madhu

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Oct 3, 2006

I am considering the use of ALTER DATABASE ... SET NEW_BROKER within an existing Service Broker instance. The reason is that I have about 23 million old endpoints in Service Broker that I am unable to clean up using the standard END CONVERSATION loops that have been discussed on these forums previously. It's a busy database, and it just cannot do the job within a reasonable timeframe.

There are no critical conversations to be lost, becuse the majority of the old endpoints deal with ASP.NET SQL caching, so they are disposable.

I have read that using the ALTER DATABASE command will delete all past endpoints, but I haven't seen much in the way of the retention of the existing message framework.

If I execute ALTER DATABASE ... SET NEW_BROKER, will it retain everything I have setup, including security, message types, contracts, services, queues, etc.? Is there anything, other than the old conversations and endpoints, that is deleted?

Thanks very much!

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Feb 20, 2007

System Configuration :
OS : Windows 2003 latest SP
SQL Server : Standard Edition, SP2
Microsoft SQL Server 2005 - 9.00.3042.00 (Intel X86)
Feb 9 2007 22:47:07
Copyright (c) 1988-2005 Microsoft Corporation
Standard Edition on Windows NT 5.2 (Build 3790: Service Pack 1)

DownTime : This is not a 24x7 kind of machine. It can have downtime

Reference : http://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=1198044&SiteID=1
http://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=1026884&SiteID=1

I have been discussing this Service Broker issues in this forum for quite sometimes and sorry to bother u all again€¦ To make things more clearer before implementing in production environment I have few doubts and it should be clarified..

As discussed in the first link we can clear sys.conversation_endpoints by just giving ALTER DATABASE GPx SET NEW_BROKER WITH ROLLBACK IMMEDIATE. But my apprehension is that if we run this command on production server and it truncate this table€¦ what will be the impact and overall overhead on the system€¦ Is it recommended to give this statement on Production Server daily at less traffic times, to clear this table ?€¦ will it have adverse effect. I repeat I have downtime , I can even shutdown this server daily€¦

I also, just want to know why Microsoft has not looked into this aspects€¦ why the system itself is clearing the expired messages.. What is the thought behind this architecture

I have the script to run in batch€¦ but in high-level meetings it is always difficult to convince this architecture/process€¦


Thanks in advance

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Sep 10, 2006

I use ASP.NET 2.0 and SQL 2005, the SQLCacheDependency didn't work stable for me, it usually works and after a while, it stops working. Recently, It doesn't work. Today I reset service broker by

Alter DB set new_broker

It seems all work, but too early to be happy, it doesn't work now anymore. I don't see any record in

sys.transmission_queue

And I don't see new entries in

sys.dm_qn_subscriptions neither when I modify a record which bind to SQLCacheDependy.

I see some errors in log like


Message
The query notification dialog on conversation handle '{8F8CC642-6340-DB11-8F09-0014227B7B80}.' closed due to the following error: '<?xml version="1.0"?><Error xmlns="http://schemas.microsoft.com/SQL/ServiceBroker/Error"><Code>-8490</Code><Description>Cannot find the remote service &apos;SqlQueryNotificationService-f79776f7-9ca5-4c5f-8a66-0d81f7673683&apos; because it does not exist.</Description></Error>'.

Any idea how to find out the problem?

thanks!

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Nov 1, 2007

Hi all - I'm trying to optimized my stored procedures to be a bit easier to maintain, and am sure this is possible, not am very unclear on the syntax to doing this correctly.  For example, I have a simple stored procedure that takes a string as a parameter, and returns its resolved index that corresponds to a record in my database. ie
exec dbo.DeriveStatusID 'Created'
returns an int value as 1
(performed by "SELECT statusID FROM statusList WHERE statusName= 'Created') 
but I also have a second stored procedure that needs to make reference to this procedure first, in order to resolve an id - ie:
exec dbo.AddProduct_Insert 'widget1'
which currently performs:SET @statusID = (SELECT statusID FROM statusList WHERE statusName='Created')INSERT INTO Products (productname, statusID) VALUES (''widget1', @statusID)
I want to simply the insert to perform (in one sproc):
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This works fine if I call this stored procedure in code first, then pass it to the second stored procedure, but NOT if it is reference in the second stored procedure directly (I end up with an empty value for @statusID in this example).
My actual "Insert" stored procedures are far more complicated, but I am working towards lightening the business logic in my application ( it shouldn't have to pre-vet the data prior to executing a valid insert). 
Hopefully this makes some sense - it doesn't seem right to me that this is impossible, and am fairly sure I'm just missing some simple syntax - can anyone assist?
 

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Mar 3, 2008

Hi all,

I have 2 sets of sql code in my SQL Server Management Stidio Express (SSMSE):

(1) /////--spTopSixAnalytes.sql--///

USE ssmsExpressDB

GO

CREATE Procedure [dbo].[spTopSixAnalytes]

AS

SET ROWCOUNT 6

SELECT Labtests.Result AS TopSixAnalytes, LabTests.Unit, LabTests.AnalyteName

FROM LabTests

ORDER BY LabTests.Result DESC

GO


(2) /////--spTopSixAnalytesEXEC.sql--//////////////


USE ssmsExpressDB

GO
EXEC spTopSixAnalytes
GO

I executed them and got the following results in SSMSE:
TopSixAnalytes Unit AnalyteName
1 222.10 ug/Kg Acetone
2 220.30 ug/Kg Acetone
3 211.90 ug/Kg Acetone
4 140.30 ug/L Acetone
5 120.70 ug/L Acetone
6 90.70 ug/L Acetone
/////////////////////////////////////////////////////////////////////////////////////////////
Now, I try to use this Stored Procedure in my ADO.NET-VB 2005 Express programming:
//////////////////--spTopSixAnalytes.vb--///////////

Public Class Form1

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click

Dim sqlConnection As SqlConnection = New SqlConnection("Data Source = .SQLEXPRESS; Integrated Security = SSPI; Initial Catalog = ssmsExpressDB;")

Dim sqlDataAdapter As SqlDataAdapter = New SqlDataAdaptor("[spTopSixAnalytes]", sqlConnection)

sqlDataAdapter.SelectCommand.Command.Type = CommandType.StoredProcedure

'Pass the name of the DataSet through the overloaded contructor

'of the DataSet class.

Dim dataSet As DataSet ("ssmsExpressDB")

sqlConnection.Open()

sqlDataAdapter.Fill(DataSet)

sqlConnection.Close()

End Sub

End Class
///////////////////////////////////////////////////////////////////////////////////////////

I executed the above code and I got the following 4 errors:
Error #1: Type 'SqlConnection' is not defined (in Form1.vb)
Error #2: Type 'SqlDataAdapter' is not defined (in Form1.vb)
Error #3: Array bounds cannot appear in type specifiers (in Form1.vb)
Error #4: 'DataSet' is not a type and cannot be used as an expression (in Form1)

Please help and advise.

Thanks in advance,
Scott Chang

More Information for you to know:
I have the "ssmsExpressDB" database in the Database Expolorer of VB 2005 Express. But I do not know how to get the SqlConnection and the SqlDataAdapter into the Form1. I do not know how to get the Fill Method implemented properly.
I try to learn "Working with SELECT Statement in a Stored Procedure" for printing the 6 rows that are selected - they are not parameterized.




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Jan 29, 2015

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CREATE PROCEDURE [dbo].[runDMQ3_2014LDLComplete]
@QQ_YYYY char(7),
@YYYYQQ char(8)
AS
begin
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Mar 13, 2007

Hi There

I just had the following scenario.

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I send messages to the service, however i see that the messages just sit in the queue. I run profiler with all SB and Error events there is nothing, i check the sql server log, there is also nothing.

So i have no idea why the activated proc is not firing, all i see in the profiler trace is that the messages are acknowledged but the activated proc does not execute.

For a while i was stumped. i then tried to execute the proc myself and i got a syntax error.

Basically what happened was that i altered a table that the proc used and now the proc cannot execute cos there are more columns that must be inserted so i altered the proc.

However the activated proc still did not fire.

I had to disable and re-enable activation for it to work.

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Sep 10, 2006

Hi there

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Basically i need to make the sp dynamic, so that no matter which queue activated the sp the sp can determine the queue name and use that dynamically to do the receive command from the right queue.

I am sure it is possible since sys.dm_broker_activated_tasks shows how many sp's are activated by each queue, however the sp name is the same for all queues so that does not help me.

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Nov 27, 2013

I have 3 tables, please find the table structure and sample data below

Table 1 : tblUserInfo

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1 Testuser01 User01@User.com 10-10-2013
2 Testuser10 User10@User.com 11-10-2013
3 Testuser20 User10@User.com 11-10-2013

Table 2 : tblOffers

OfferID | OfferName | ExpiryDate

1 OfferSample1 15-10-2014
2 OfferSample2 15-9-2014
3 OfferSample3 10-07-2014

Table 3 :tblOfferActivated

ActivationID | UserID | OfferID | ActivationCode | ActivatedDate

1 2 3 ABC 11-11-2013
2 2 1 CEG 13-11-2013
3 3 1 JHG 18-11-2013
4 3 2 KIU 20-11-2013

Expected Output

I want to list out the users with the first activated offer details.The OfferName Should be based on the first activated date

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1 Testuser01 User01@User.com 10-10-2013 Null Null Null Null
2 Testuser10 User10@User.com 11-10-2013 3 OfferSample2 11-11-2013 ABC
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Code Snippet
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DECLARE @portion INT
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Code Snippet
Msg 102, Level 15, State 1, Line 1
Incorrect syntax near '@portion'.




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Calling Stored Procedure Fromanother Stored Procedure

Oct 10, 2006

Hi,I am getting error when I try to call a stored procedure from another. I would appreciate if someone could give some example.My first Stored Procedure has the following input output parameters:ALTER PROCEDURE dbo.FixedCharges @InvoiceNo int,@InvoiceDate smalldatetime,@TotalOut decimal(8,2) outputAS .... I have tried using the following statement to call it from another stored procedure within the same SQLExpress database. It is giving me error near CALL.CALL FixedCharges (@InvoiceNo,@InvoiceDate,@TotalOut )Many thanks in advanceJames

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Use Resultset Returned From A Stored Procedure In Another Stored Procedure

Nov 15, 2006

I have a store procedure (e.g. sp_FetchOpenItems) in which I would like to call an existing stored procedure (e.g. sp_FetchAnalysts). The stored proc, sp_FetchAnalysts returns a resultset of all analysts in the system.
I would like to call sp_FetchAnalysts from within sp_FetchOpenItems and insert the resultset from sp_FetchAnalysts into a local temporary table. Is this possible?
 Thanks,
Kevin

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