Nested Transactions Question.
May 21, 2007
Hope I am posting in the right forum. If I understand correctly, a ROLLBACK TRAN statement rolls all transactions (if they are nested) back to the original BEGIN TRAN.
I have a situation when an SP uses a transaction, performs a series of operations inside that transaction, including a call to a different SP, which uses a distributed transaction. If the transaction inside the child SP fails and needs to be rolled back, I get a warning message saying that the tran count on the way out is less than that on the way in. No problem, since it's not fatal. But the problem manifests when I attempt to use the SQL Agent to schedule a job to run the parent SP. It fails on that warning message, interpreting it as an error.
I was thinking of disabling the distributed transaction inside the child SP, and just have the transaction in the parent SP, which, again if I understand correctly, should be escalated to a distributed transaction once the child SP is called. The child SP will raise an error (if it's a real error) and then the trnasaction in the parent SP will handle the rollback of everything.
The reason for this elaborate setup is that I need to cycle through a cursor (yes, I know, sloppy, can't see an alternative) in the parent SP, and each iteration begins and commits (or rolls back) a transaction.
Wil this work? Can anyone suggest a better way?
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Oct 22, 1999
Hello;
I have a question why does not the following nested transaction work?
begin tran
insert into t1 values('A')
begin tran
insert into t2 values('1')
commit
insert into t3 values('B')
begin tran
insert into t2 values('2')
commit
rollback
The rollback is rolling back everything.
Thanks
Nathan
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Mar 12, 2004
I am writing a program using VC++ 6.0 and SQL 2000 and I am trying to use nested transactions. I have 1 outer transaction and the 2 inner transactions are in sepetrate function calls inside the outer transaction. I have something like this:
BEGIN TRANSACTION;
if (!functioncall1()) // commit if function suceeds, otherwise rollback
{
Rollback Transaction;
return;
}
if (!functioncall2()) // commit if function suceeds, otherwise rollback
{
Rollback Transaction;
return;
}
COMMIT TRANSACTION ;
Both functions contain a complete transaction inside the function call. If either function fails however, I want to do a rollback of the entire transaction. This is not happening though. If functioncall1 suceeds and the transaction in that function commits, then if I do a rollback during functioncall2, the transaction in functioncall1 is not rolled back. This seems to be directly opposite of the SQL help for transaction. Am I missing something obvious here?
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Aug 28, 2006
Hello! Sorry if I choose wrong forum for this post.
I have next scenario:
Transaction1
Transaction2
Commit Transaction2
Transaction3
Commit Transaction3
Commit Transaction1 I wanna implement it in C# code (.NET 1.1, MS SQL 2000):
IDbConnection connection = new OleDbConnection(connectionString);
IDbTransaction transaction = null;
connection.Open();
/* NOTE: I can't use something like this:
* transaction outter = connection.BeginTransaction();
* transacrion inner = connection.BeginTransaction();
* // Here I'm getting an error: OleDB doesn't support parallel transactions,
* // though I wanna create nested one.
*/
// So, I decided to turn implicit transactions mode on in hope it should help:
IDbCommand bt = connection.CreateCommand();
bt.CommandText = " SET IMPLICIT_TRANSACTIONS ON; BEGIN TRANSACTION;";
bt.ExecuteNonQuery();
transaction = connection.BeginTransaction();
IDbCommand command = connection.CreateCommand();
command.Transaction = transaction;
command.CommandType = CommandType.Text;
command.CommandText = "Insert into Region (RegionID, RegionDescription) VALUES (100, 'Description');";
command.ExecuteNonQuery();
command.CommandText = "SELECT @@TRANCOUNT;";
int transCount = (int)command.ExecuteScalar(); // It's equal to 2 here, seems to be OK.
transaction.Commit();
// Let's start the second "nested" transaction
IDbTransaction transaction1 = connection.BeginTransaction();
IDbCommand command1 = connection.CreateCommand();
command1.Transaction = transaction1;
command1.CommandType = CommandType.Text;
command1.CommandText = "Insert into Region (RegionID, RegionDescription) VALUES (101, 'Description');";
command1.ExecuteNonQuery();
command1.CommandText = " SELECT @@TRANCOUNT; ";
transCount = (int)command1.ExecuteScalar(); // WOW! Now it's already equal to 1 here.
transaction1.Commit();
// Well, here I wanna close outter transaction, but... I'll get exception: There is nothing to commit here
bt = connection.CreateCommand();
bt.CommandText = "Commit TRANSACTION";
bt.ExecuteNonQuery();
Well, I know that SQL Server has no support for nested transactions. Nesting of transactions only increments @@TRANCOUNT and it is the final commit that has control over the outcome of the entire transaction. And I can't use the new TransactionScope class in .NET Framework 2.0 which has promotable transactions concept.
Please help me: How can I implement required operations?
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Nov 30, 2006
Can anyone verify for me whether SQL Server CE 2.0 does or does not support nested Transactions when using the SQLServerCe Data Provider? The SQL Server CE Books Online documentation definitely states that SQL Server CE supports nested Transactions, but the example provided uses ADOCE Data Provider. The error message that I get when trying to begin a new Transaction with an existing Transaction still uncommitted on the same SqlCeConnection is "SQL Server CE does not support parallel transactions". Is it not possible to nest Transactions with SQLServerCE Data Provider?
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Nov 30, 2005
Friends,
I've a very basic doubt with Nested transactions (across procedures) in SQL Server and i guess the given below sample code illustarates my doubt well more than my words ..
I've a Proc1 like this
create procedure sp_proc1
as
begin
begin tran sp_proc1
insert into tab1 values (1,2)
exec sp_proc2 1
if <Some cdn statement>
rollback tran sp_proc1
else
commit tran sp_proc1
end
and called proc sp_proc2 is like this
create procedure sp_proc2
(
@val1 int
)
as
begin tran proc2
update tab2 set col1 = 5
IF <some cdn statement>
begin
rollback tran proc2
end
else
begin
commit tran proc2
end
The pblm is when the 1st proc is executed and when the cdn statement in the 2nd proc is sucess, then it results with the error
Failed to retreive execution plan: Cannot roll back proc2. No transaction or savepoint of that name was found.
any suggestions
--SQLPgmr
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Sep 19, 2007
This should be a fairly simple question. It's based on this error message:"Transaction count after EXECUTE
indicates that a COMMIT or ROLLBACK TRANSACTION statement is missing.
Previous count = 1, current count = 0." I get this when executing a stored procedure upon processing a form. This error happens when I intentionally provide input to the stored procedure that I know should cause it to error out. I catch the exception, and it contains the error message, but it also contains the above message added on to it, which I don't want. I won't post the entire stored procedure. But I'll list a digest of it (Just those lines that are significant). Assume that what's included is what happens when I provide bad input:BEGINBEGIN TRYBEGIN TRANSACTION RAISERROR('The item selected does not exist in the database.', 16, 1); COMMIT -- This won't execute when the RAISERROR breaks out to the CATCH block END TRY BEGIN CATCHROLLBACKDECLARE @ErrorSeverity INT, @ErrorMessage NVARCHAR(4000)SET @ErrorSeverity = ERROR_SEVERITY()SET @ErrorMessage = ERROR_MESSAGE() RAISERROR(@ErrorMessage, @ErrorSeverity, 1) END CATCH END Okay, so that works fine. The problem is when I execute this with an SqlCommand object, on which I've opened a transaction. I won't include the entire setup of the data (with the parameters, since those seem fine), but I'll give my code that opens the connection and executes the query: con.Open(); SqlTransaction transaction = con.BeginTransaction(); command.Transaction = transaction; try { command.ExecuteNonQuery(); transaction.Commit(); } catch (Exception ex) { transaction.Rollback(); } finally { con.Close(); } I'm calling the stored procedure listed above (which has its own transaction), using a SqlCommand object on which I've opened a transaction. When there is no error it works fine. But when I give the stored procedure bad data, it gives me that message about the transaction count. Is there something I need to do in either my SQL or my C# to handle this? The entire message found in the Exception's Message is a concatenation of the message in my RAISERROR, along with the transaction count message I quoted at the beginning. Thanks, -Dan
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Nov 24, 1998
Ok sql-masters, I'm stumped and need someone to come to the rescue.
The issue: nested transactions = dblibrary process dead; broken connection or runaway process.
On the first try it usually bombs with the dblibrary... error. If I continue trying to run it, it will run, but actually runaway.
The sp:
/****** Object: Stored Procedure dbo.UP_MR1700 Script Date: 10/03/1998 11:00:08 AM ******/
CREATE PROCEDURE UP_MR1700 AS
DECLARE @TotRecs int
TRUNCATE TABLE MR1700_WorkTable1
EXECUTE MR1700_Insert_WT1_OnHand
EXECUTE MR1700_Insert_WT1_Packed
EXECUTE MR1700_Insert_WT1_Allocated
EXECUTE MR1700_Insert_WT1_Capacity
SELECT @TotRecs = (SELECT COUNT(Store_No) FROM MR1700_WorkTable1)
IF @TotRecs = 0 OR @TotRecs IS Null
RETURN -100
TRUNCATE TABLE MR1700_WorkTable2
EXECUTE MR1700_Insert_WT2_Classes
EXECUTE MR1700_Insert_WT2_Depts
EXECUTE MR1700_Insert_WT2_ClassGroups
EXECUTE MR1700_Insert_WT2_DeptGroups
EXECUTE MR1700_Report_Request
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May 22, 2005
Hi there,
I have decided to move all my transaction handling from asp.net to stored procedures in a SQL Server 2000 database. I know the database is capable of rolling back the transactions just like myTransaction.Rollback() in asp.net. But what about exceptions? In asp.net, I am used to doing the following:
<code>Try 'execute commands myTransaction.Commit()Catch ex As Exception Response.Write(ex.Message) myTransaction.Rollback()End Try</code>Will the database inform me of any exceptions (and their messages)? Do I need to put anything explicit in my stored procedure other than rollback transaction?
Any help is greatly appreciated
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Aug 13, 2003
Hi All,
Can anybody suggest me a website where I can find articles on Managing transactions with Sql server. Also a scenario where the transactions take place in a environment involving 2 different databases, Like the bank account and credit card transactions (specifically of 2 way kind)
Thanks
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Apr 6, 2005
I have a web application with a shopping cart, how do I stop all the shopping cart transaction from going into the db log? Is this possible? These are are only transient data movements, and will never be need to to restore to, and they are cause log bloat. Or is there a better way to stop log bloat?
Thanks
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Apr 17, 2000
Hi All,
How can we change connection properties in a DTS pkg with connection?
You can loop through the connection count but the connection ID is not static one.So can’t rely on that.
Is there another way of changing connection properties?
Thanks in Advance
Barath
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Sep 5, 2000
Hi all....
I am currently designing a DTS Package to import data that is processed daily into a large database.
I have to design the package such that if any step fails when importing, I roll back the entire transaction.
I have designed the package with this in mind, checked "join transaction if present" and "rollback transaction on failure" in all of the workflows. I have also made all workflows serialized.
However, when I run the package, it fails on one of the data pumps with the error:
Transaction context in use by another session.
Any ideas?
Thank you,
Brian
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Dec 1, 2000
I am replicating (finally!!) and on my publishers agent history I can see it says xx transactions with xx commands were delivered. (xx being the number)
Where can I look to see what the transactions or commands are?
Is there a place the system stores this information?
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Oct 17, 2003
what is maximum limit of no. of transactions per sec. in sql server 2000
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Sep 6, 2004
Is there a point to wrapping a single UPDATE or INSERT statement in an explicit TRANSACTION:
BEGIN TRANSACTION
INSERT INTO Table (...) VALUES (...)
COMMIT TRANSACTION
I understand ACID and concept of transactions. However, I thought they were only necessary for multi-statement operations. I'm maintaining code that does this and am wondering if this is necessary. Does SQL Server guarantee ACID for single statements? Are single UPDATE/INSERT statements prone to race condition like affects without using explicit transactions?
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Apr 17, 2008
Are there any scenarios where an un-commited transaction would block further queries?
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May 27, 2008
If you run the Begin Transaction code and then run a create such as an update query and you see that it effects the number of rows that you wanted it to effect is there a way to look at the actual data that changed before you Commit Transaction?
Thanks!
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Jul 1, 2007
I have a table with around 240 columns and one of the column in the Table is the Inserttime ( DATETIME ) and I using a GETDATE() function in the stored Proc, when we insert data into the table. In the same Milli second 2007-06-27 09:32:58.303 , I have around 7600 records in the database. The Stored Proc is called for each Individual record and we don't bunch the transactions. Is this possible.
I did some bench marking on this server and I can insert only 700 - 800 records approx / sec on this particular table.
Thanks
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Aug 1, 2007
I have a small database that I have been testing.I get an error about a transaction deadlock.The code is in stored procedures and I added transactions to the sp'sbut the error happened again.I wrapped the whole sp in just one transaction and I don't have anyindex on the tables.When I test just by running a program that sends 3 calls at a time itwill get a deadlocked transaction as I send 6 or 9 at a time.I am not sure how it can have a deadlocked transaction after I usedtransactions(begin and commit) in the sp's.Steve
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Oct 8, 2007
I am working with transactions and use try catch to capture errors and in the event of an error i have to rollback the transaction. How can i perform this?, most of the errors which i forsee are either insertion of null values into non nullable columns or violation of Primary keys while inserting duplicates.
I started by coding the following way but it does not rollaback apparently the try catch does not work for above kind of errors..Can somebody help..
DECLARE @REPORTING_PERIOD VARCHAR(6)
BEGIN TRY
BEGIN TRANSACTION
-- SET NOCOUNT ON added to prevent extra result sets from
-- interfering with SELECT statements.
SET NOCOUNT ON;
SET @REPORTING_PERIOD =(Select REPORT_PERIOD_ID from dbo.T_REPORT_PERIOD where C_FLAG_ACTIVITY=1)
--Step 1
INSERT INTO [dbo].[T_COUNTRIES]
([C_COUNTRY]
,[LB_COUNTRY]
,[C_REGION]
,[FK_REPORTING_PERIOD])
SELECT [C_COUNTRY]
,[LB_COUNTRY]
,[C_REGION]
,@REPORTING_PERIOD
FROM [dbo].[IN_T_COUNTRIES]
--Step 2
INSERT INTO [dbo].[T_FLE]
([FK_P_FLE]
,[C_COSMOS]
,[LB_FLE]
,[C_PARETO]
,[C_OPCO_SCOPE]
,[C_LEVEL]
,[C_FLE_TYPE]
,[C_ACTIVITY]
,[F_MATERIAL]
,[C_MATERIAL_PRIORITY]
,[C_CALCULATION_METHOD]
,[F_CREDIT_RISK_MATERIALITY]
,[V_PARTICIPATION]
,[FK_REPORTING_PERIOD])
SELECT Null as [FK_P_FLE]
,[C_COSMOS]
,[LB_FLE]
,[C_PARETO]
,[C_OPCO_SCOPE]
,[C_LEVEL]
,[C_FLE_TYPE]
,@REPORTING_PERIOD
FROM [dbo].[IN_T_FLE]
COMMIT TRANSACTION
END TRY
BEGIN CATCH
SELECT
ERROR_NUMBER() as ErrorNumber,
ERROR_LINE() as ErrorLine,
ERROR_MESSAGE() as ErrorMessage;
-- Test XACT_STATE for 1 or -1.
-- XACT_STATE = 0 means there is no transaction and
-- a commit or rollback operation would generate an error.
-- Test whether the transaction is uncommittable.
IF (XACT_STATE()) = -1
BEGIN
PRINT
N'The transaction is in an uncommittable state. ' +
'Rolling back transaction.'
ROLLBACK TRANSACTION;
END;
-- Test whether the transaction is active and valid.
IF (XACT_STATE()) = 1
BEGIN
PRINT
N'The transaction is committable. ' +
'Committing transaction.'
COMMIT TRANSACTION;
END;
END CATCH;
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Nov 8, 2006
Hello All,
When i am working with Transactions i got one doubt.
If i am inserting any records into a table with primary key if a transaction is rolled back i am finding one primary ID is missing. Is it so.
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Apr 2, 2007
I've been searching around and haven't found anything that simply states what I want to know.
I want to use a transaction within my CLR Stored Proc, to do so I've got System.Transactions referenced and I can access the current transaction via Transaction.Current.
My questions are
Will there always be a current transaction?
Do I need to create a new transaction if one doesn't already exist?
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Sep 4, 2006
Hi world:
I have this issue:
I need to push rows from CE to SQL Server 2000 and after delete these rows of CE database only if all rows have been sent to SQL Server 2000.
I think the best is work with transactions. Since I know I can use transactions for this purpose, can anybody give me a link with push transaction examples ?
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Dec 17, 2007
Hi all,
What does "Transactions/sec" counter in SQL 2005 under databases do in terms of performance. My counter shows almost 100% all the time in 4 terrbyte DB in superdome with many CPUs.
Which is the optimal value for this counter?
thanks in advance
Priw
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Mar 31, 2008
Hi,
I am using C#.NET 2005, SQL Server 2000.
I have a few questions to ask. Firstly, can anybody help me by telling the difference between the code below and the same code with comments removed:
string localquery = "select bla bla"; SqlDataAdapter _sda; DataTable _dt; SqlCommand _cmd; bool isErrCatched = false; Exception ExcToThrow = new Exception(); using (SqlConnection _cn = NewConnection) // NewConnection returns a static SQLConnection object { _cn.Open(); _cmd = new SqlCommand(localquery, _cn); //SqlTransaction myTrans; //myTrans = _cn.BeginTransaction(); //_cmd.Transaction = myTrans; _dt = new DataTable(); _sda = new SqlDataAdapter(_cmd); try { _sda.Fill(_dt); _sda.Dispose(); //myTrans.Commit(); } catch (Exception exc) { //try { myTrans.Rollback(); } catch {} isErrCatched = true; ExcToThrow = exc; } finally { _cn.Close(); } _cmd.Dispose(); } _cmd = null; if (isErrCatched) throw ExcToThrow; return _dt;
My first question: Can there be a performance loss if I uncomment the lines about transaction usage? I mean, when I do this I start to get more timeouts.
My problem goes on. When I comment those lines and run a stress tool, I am getting "column X does not belong to table Y" errors. If those lines are not commented i am not getting this error, but I get timeout errors frequently. So, my second question: is there something wrong in my query or is there a bad coding practice I am following? Could someone offer a better and more robust sample for this code block?
By the way, connection pooling is on. And these errors are observed under high loads.
Thanks everybody.
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Jun 7, 2006
I have transaction that will run on an hourly bases. I need to make sure that no one will start this transaction while it is running. I just need to know the system table that has all the transaction names in them and check to see if the transaction is running or not. what i am trying to do is not to have locks....just wanting to make sure that no one would run the same transaction twice. does anyone have any idea on how we can do this?
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Mar 11, 2008
If you ask a .net developer he would likely say that he uses System.Transactions to manage transactions, a DBA on the other hand places transactions within the T-SQL of stored procedures.
What rules do architects and others, use when determining if the transactions should be placed in:
.net Middle Tier Components using System.Transactions for example.
T-SQL Stored Procedures.
Both .net Middle Tier Components and T-SQL Stored Procedures.
Thanks in advance,
Doug Holland
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Jan 3, 2007
Can you give a whole SQL statement an alias so you can use it later?
Eg.
SELECT * FROM Employees WHERE age < 19
-- Could I call the above statement something like 'statement1' to use below as shown
SELECT * FROM Employees WHERE age < 25 AND NOT IN (statement1)
Soin effect I get a nested statement.
The reason I am asking about aliases is because this would need to be repeated for, E.g. age < 30 Then age < 35 and so on and so forth.
So basically, I just want to alias a qhole SQL statement
Any help would be greatly appreciated - George
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Jul 20, 2005
Hi all,I have a query that looks like so:SELECT GLDCT AS [Doc Type], GLDOC AS DocNumber, GLALID ASPerson_NameFROM F0911WHERE (GLAID = '00181913')However by stipulating that GLAID = GLAID I cannot get the person_nameas not all the GLALID fields are filled in. from my reading of thehelpdesk I have a felling that a nested query might be the way to goor a self-join but beyond this I am lost!?Many thanks for any pointers in advance.Sam
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Oct 15, 2007
I am trying to do some nested IF ELSE conditions. I get an error saying 'Error near work Begin'. Below is teh query and the variables comes in thru cursor.
Can somebody advise me on this and also let me know the best practices and alternative to this if any.
IF (@CCTable = 'Claiminassoc')
BEGIN
IF ( @ClaimCenterField = 'ClaimID' AND @VALUE ='Claim')
BEGIN
UPDATE dbo.Table SET ColName = 'Y'
WHERE ID = @ID AND CCTable = 'Claiminassoc' AND CCField = 'ClaimID'
AND DWField = 'CatastropheDesignationFlag'
END
END
ELSE IF (@CCTable = 'EmploymentData')
BEGIN
IF (@VALUE ='TRUE')
BEGIN
UPDATE dbo.Table SET ColName = 'Y'
WHERE ID = @ID AND CCTable = 'Claim' AND CCField = 'WagePaymentCont'
END
ELSE IF (@VALUE ='FALSE')
BEGIN
UPDATE dbo.Table SET ColName = 'N'
WHERE ID = @ID AND CCTable = 'Claim' AND CCField = 'WagePaymentCont'
END
END
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Apr 2, 2008
Hi gang,
I have a challenge, which seems like it is probably trivial, but SQL chops are not up to the task, and I am hoping one of you hot-shot DBAs can throw me a bone!
I have a query that populates an OLAP Time dimension table (basically one row per day of the year over several years). What I want to do is expand that table to include each hour of each day over the time span.
The CTE I am using for the day population is:
Code Snippet
WITH dates(date)
-- A recursive CTE that produce all dates between 2006 and 2057-12-31
AS
(
SELECT cast('2006' AS dateTime) date -- SQL Server supports the ISO 8601 format so this is an unambigious shortcut for 1999-01-01
UNION ALL -- http://msdn2.microsoft.com/en-us/library/ms190977.aspx
SELECT (date + 1) AS date
FROM dates
WHERE
date < cast('2058' AS dateTime) -1
)
What I wanted to do was something like:
Code Snippet
WITH hours(hr)
AS
(
SELECT (DATEPART(hh,date) hr
UNION ALL
SELECT (hr + 1) AS hr
FROM hours
WHERE hr < 24
)
inserted just after
Code Snippet
FROM dates
in the initial CTE. But from what I have read, it seems as though nested CTEs are not allowed.
Can anyone show me how to do this?
Thanks in advance for ANY insight/input!
Cheers,
Chris
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Feb 14, 2008
Greetings -
Can someone pls advise the maximum number of nested IIF statements allowed in a VS 2005 report builder layout textbox expression? I seem to be hitting a wall at about 10, but cannot find verification. In case the limitation is by characters, the full expression would run about 3,500. Any other limitations which may have a bearing?
Tks & B/R
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