Does anybody know of some good resources comparing transaction management techniques used in sql server. I am particularly interested in the areas of concurrency control, locks and recovery.
View 2 RepliesHello,
I apologize if this isn't the most appropriate place to ask but we have a SQL 2k server behind our website and we recently added a product review portion to our product pages. In the comments field in our db we are getting entries like:
1. Online Pharmacy, [url=http://w
2. iPb95U <a href="http://kmajvv (html tags are replaced in actual db)
My question is why the cut off? I just converted the code from escaped quotes and string concat to a stored proc using ADO params. The first entry was submitted with the sproc and the second while the string concat was still being used. So the visitor must be purposely truncating the entry, but I'm curious as to why. Is it just to try and break the code?
If anyone knows of better place to post questions like these, maybe a security forum, please let me know.
Thanks
Hi,
Still using 2000; I'm trying to figure out where to even start with optimization in SQL queries. BOL is very confusing to me on this point. I ran the following query with and without and index as seen below. Is Trace a good place to start?
DROP INDEX OrdDetails.OrderID_ind
GO
CREATE INDEX OrderID_ind
ON OrdDetails (OrderID)
GO
select count(*) from OrdDetails = 6467155 rows
GO
-- query; without index Duration 156; CPU 95; Reads 54
-- query; with index Duration 66; CPU 15; Reads 97
select OrderID, Count(OrderID) AS OrderIDCnt from OrdDetails
group by OrderID
having count(*) > 1
GO
Why are the reads more with the index? This is just a simple non-clustered index, which I believe is the default. Should I be starting elsewhere to find out this info?
thx.
Kat
Hi,
I'm new to MS SQL and would like to get your opinion on how it's possible to automatically manage transaction log growth. I've read the following on the topic:
"When Microsoft SQL Server finishes backing up the transaction log, it truncates the inactive portion of the transaction log. This frees up space on the transaction log. SQL Server can reuse this truncated space instead of causing the transaction log to continuously grow and consume more space. The active portion of the transaction log contains transactions that are still running and have not completed yet."
I'm backing up the transaction logs on a daily basis. Still one of the logs grew up to 130Gb even though I have shrunk it in the past. How can I manage the growth automatically without shrinking the log files manually every time they grow beyond a certain threshold?
Thanks in advance,
Alla
Hi,
I'm new to MS SQL and would like to get your opinion on how it's possible to automatically manage transaction log growth. I've read the following on the topic:
"When Microsoft SQL Server finishes backing up the transaction log, it truncates the inactive portion of the transaction log. This frees up space on the transaction log. SQL Server can reuse this truncated space instead of causing the transaction log to continuously grow and consume more space. The active portion of the transaction log contains transactions that are still running and have not completed yet."
I'm backing up the transaction logs on a daily basis. I believe that all or most of the portions of the log are inactive by the time the backup starts. Still one of the logs grew up to 130Gb even though I have shrunk it in the past. How can I manage the growth automatically without shrinking the log files manually every time they grow beyond a certain threshold? Also, how can I check whether some of the log portions are active or inactive?
Thanks in advance,
Alla
Let's say I may possibly use two transactions in a script, the secondone will depend on the successful execution of the first one.The following code works. However, I'm wondering if SQL Server 2000has some internal function like @@transaction_status to indicate thestatus of the most recent transaction by the connection. The analogueof @@FETCH_STATUS. Then, my own error tracking code could be omitted.Thanks.-- ENV: SQL Server 2000-- ddlscreate table tblA (col1 smallint, col2 smallint)create table tblB (col1 smallint, col2 smallint)create table tblX (col1 char(1), col2 varchar(20))declare @errorCode tinyIntset @errorCode = 0begin transaction fTraninsert into tblAvalues (7,1);insert into tblBvalues (8,0);-- we know this guy will failinsert into tblXvalues ('ab','abcdefge')If (@@error <> 0)beginselect @errorCode = 1endif (@errorCode = 1)rollback transaction fTranelsecommit transaction fTranif (@errorCode = 0)pseducode: start second transaction here ...elseprint 'fTran failed.';RETURN
View 2 Replies View RelatedSome time ago, I came across some posts that suggested that remote execution of SSIS packages was only supported if the package was wrapped by a SQL Server Job Agent job.
Is this correct?
Would the web service technique described below then not be supported?
http://msdn2.microsoft.com/en-us/library/ms403355.aspx
As I understand, there are approaches for running programatically:
1. sp_start_job
2. xp_cmdshell
3. Microsoft.SqlServer.Dts.Runtime API calls
Understanding that SQL Server Job Agent is the preferred approach, please advise as to if any of the above are NOT supported by Microsoft.
Thanks,
Rick
I need to keep a table indicating the number of "transactions" or Logical Units of Work (LUW) against each database each day. I know transactions are defined with a Begin and End statement but most of our software is from 3rd party vendors who don't use begin and end. How can I determine how many transactions (not necessarily I/O although that might be nice in the future) has occurred against each database. Books On Line does not address the question of transactions other than to say use the Begin/End statments. Any thoughts would be greatly appreciated.
Thanks in advance
Bill Bergen (1-302-636-6814)
I have worked with many data mining softwares and found SQL Data mining part of Microsoft product needs to imrove a lot to whoo the customers.
what are some common techniques for ensuring an isolated temp table scope? For example, if 2 different sprocs happen to crud a temp table with the same name? I'm guessing that big SQL shops establish a standard for this early on to avoid conflicts between sprocs.
View 3 Replies View RelatedI have a SSIS package that is run from one job, nowhere else. The package has TransactionOption NotSupported.
In the SSIS package I first have a sequence container that has TransactionOption Required (Serializable). The sequence container contains several Execute SQL tasks that access the same SQL Server 2005 database. The Execute SQL tasks have TransactionOption supported / Serializable. The first SQL statement is:
select p.column_name
from table_name p with (XLOCK, ROWLOCK)
where p.second_column_name = 'COLUMN_VALUE'
After this there are a couple of SQL tasks, and finally a task containing the following SQL:
select p.third_column_name
from table_name p
where p.second_colomn_name = 'COLUNM_NAME'
The idea is that the first query exclusively locks the row in the table_name-table for mutual exclusion purposes, i.e. so that if for some reason the SSIS package would be executed simultaneously two or more times, only one package execution could lock the row and proceed and the other executions will have to wait. There's an index on column second_column_name in the table to avoid the select locking other rows in addition to the required row.
Some questions:
1) Is it so in my setup that when SSIS runtime executes the sequence container it creates a transaction in the beginning of the sequence container and commits the transaction in the end of the sequence container? And in my setup the Execute SQL tasks in the sequence containar are executed under the same transaction?
2) I have a problem that the second query sometimes gives this error:"ErrorCode: -1073548784. ErrorDescription: Executing the query "XXXXX" failed with the following error: "Transaction (Process ID 73) was deadlocked on lock resources with another process and has been chosen as the deadlock victim. Rerun the transaction.". Possible failure reasons: Problems with the query, "ResultSet" property not set correctly, parameters not set correctly, or connection not established correctly."
The 1st query has locked the row for the transaction. How can the second query be deadlocked, shouldn't the transaction have a lock on the row? I'd understand if the 1st query failed sometimes, but don't understand how the 2nd quey can fail.
r,
JM
Hi All
I'm getting this when executing the code below. Going from W2K/SQL2k SP4 to XP/SQL2k SP4 over a dial-up link.
If I take away the begin tran and commit it works, but of course, if one statement fails I want a rollback. I'm executing this from a Delphi app, but I get the same from Qry Analyser.
I've tried both with and without the Set XACT . . ., and also tried with Set Implicit_Transactions off.
set XACT_ABORT ON
Begin distributed Tran
update OPENDATASOURCE('SQLOLEDB','Data Source=10.10.10.171;User ID=*****;Password=****').TRANSFERSTN.TSADMIN.TRANSACTIONMAIN
set REPFLAG = 0 where REPFLAG = 1
update TSADMIN.TRANSACTIONMAIN
set REPFLAG = 0 where REPFLAG = 1 and DONE = 1
update OPENDATASOURCE('SQLOLEDB','Data Source=10.10.10.171;User ID=*****;Password=****').TRANSFERSTN.TSADMIN.WBENTRY
set REPFLAG = 0 where REPFLAG = 1
update TSADMIN.WBENTRY
set REPFLAG = 0 where REPFLAG = 1
update OPENDATASOURCE('SQLOLEDB','Data Source=10.10.10.171;User ID=*****;Password=****').TRANSFERSTN.TSADMIN.FIXED
set REPFLAG = 0 where REPFLAG = 1
update TSADMIN.FIXED
set REPFLAG = 0 where REPFLAG = 1
update OPENDATASOURCE('SQLOLEDB','Data Source=10.10.10.171;User ID=*****;Password=****').TRANSFERSTN.TSADMIN.ALTCHARGE
set REPFLAG = 0 where REPFLAG = 1
update TSADMIN.ALTCHARGE
set REPFLAG = 0 where REPFLAG = 1
update OPENDATASOURCE('SQLOLEDB','Data Source=10.10.10.171;User ID=*****;Password=****').TRANSFERSTN.TSADMIN.TSAUDIT
set REPFLAG = 0 where REPFLAG = 1
update TSADMIN.TSAUDIT
set REPFLAG = 0 where REPFLAG = 1
COMMIT TRAN
It's got me stumped, so any ideas gratefully received.Thx
I have a design a SSIS Package for ETL Process. In my package i have to read the data from the tables and then insert into the another table of same structure.
for reading the data i have write the Dynamic TSQL based on some condition and based on that it is using 25 different function to populate the data into different 25 column. Tsql returning correct data and is working fine in Enterprise manager. But in my SSIS package it show me time out ERROR.
I have increase and decrease the time to catch the error but it is still there i have tried to set 0 for commandout Properties.
if i'm using the 0 for commandtime out then i'm getting the Distributed transaction completed. Either enlist this session in a new transaction or the NULL transaction.
and
Failed to open a fastload rowset for "[dbo].[P@@#$%$%%%]". Check that the object exists in the database.
Please help me it's very urgent.
I am getting this error :Distributed transaction completed. Either enlist this session in a new
transaction or the NULL transaction. Description:
An unhandled exception occurred during the execution of the current web
request. Please review the stack trace for more information about the error and
where it originated in the code. Exception Details:
System.Data.OleDb.OleDbException: Distributed transaction completed. Either
enlist this session in a new transaction or the NULL transaction.have anybody idea?!
i have a sequence container in my my sequence container i have a script task for drop the existing tables. This seq. container connected to another seq. container. all these are in for each loop container when i run the package it's work fine for 1st looop but it gives me error for second execution.
Message is like this:
Distributed transaction completed. Either enlist this session in a new transaction or the NULL transaction.
Hi,
i am getting this error "Distributed transaction completed. Either enlist this session in a new transaction or the NULL transaction.".
my transations have been done using LINKED SERVER. when i manually call the store procedure from Server 1 it works but when i call it through Service broker it dosen't work and gives me this error.
Thanks in advance.
Is it possible to run both Sql Server Management Studio: Express and full blown side by side?
I am developing with the full blown product but would like to test Management Studio Express on the same box.
Is this possible?
Thanks
Eric
I have recently installed the SQL Server Management Studio Express but I do not find Management Tools in order to create scheduled backups and shrinking of the databases. I was under the impression that this should be included in the Management Studio. I use the SQL 2005 Express for smaller customers who run the SQL on a desktop unit. I need a way to backup the data to a server machine for backup purposes. I have uninstalled and reinstalled to no avail.
I have Full database backup upto previous day and transaction logfile of Today transaction. my database has crashed. I have restored previous day's Full backup. I have faced difficulty to restore today's transaction from today's transaction log. What are the steps to restore full database back and one day's transaction log file. Note: there is no differential database backup and transaction backup.
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I want to list out the pending transaction for transaction replication by publication.
Help needed.
I'm receiving the below error when trying to implement Execute SQL Task.
"The ROLLBACK TRANSACTION request has no corresponding BEGIN TRANSACTION." This error also happens on COMMIT as well and there is a preceding Execute SQL Task with BEGIN TRANSACTION tranname WITH MARK 'tran'
I know I can change the transaction option property from "supported" to "required" however I want to mark the transaction. I was copying the way Import/Export Wizard does it however I'm unable to figure out why it works and why mine doesn't work.
Anyone know of the reason?
I created a Calculated measure in cube something like this : ([TransType].[TransTypeHierarchy].[TransTypeCategoryParent].&[SPEND],[Measures].[Transaction Amount]). To get only spend transactions. Now, I want to slice this measure with same hierarchy to find the amount distribution across different transaction types under spend transaction. But this query behaving like the measure doesn't have relation with measure.
you can think this as below query:
WITH
MEMBER SPEND AS ([TransType].[TransTypeHierarchy].[TransTypeCategoryParent].&[SPEND],[Measures].[Transaction Amount])
SELECT NON EMPTY {SPEND} ON 0
,NON EMPTY ([TransType].[TransTypeHierarchy].[TransTypeCategoryParent]) ON 1
FROM [CUBE]
Hi
How do I make use of begin transaction and commit transaction in SSIS.
As am not able to commit changes due to certain update commands I want to explicitly write begin and commit statements. but when i make use of begin and commit in OLEDB commnad stage it throws an error as follows:
Hresult:0x80004005
descriptionyntax error or access violation.
its definately not an syntax error as i executed it in sql server. also when i use it in execute sql task out side the dataflow container it doesnt throw any error but still this task doesnt serve my purpose of saving/ commiting update chanages in the database.
Thanks,
Prashant
Error returned when trying to commit the transaction to a database that is a replication distributor. (sql2005 ctp16)
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Hi,
I am having some problem with SSIS transaction. Eventhought I tried to imitate the concept that Jamie presented at http://www.sqlservercentral.com/columnists/jthomson/transactionsinsqlserver2005integrationservices.asp
. My workflow is as followed
*********************************
For Each ADO.Record in Oracle (transaction=not supported)
If (Certain_Field_Value = 'A')
Lookup Data in SQL DB with values from Oracle (transaction=not supported)
DO Sequence A (Start a Transaction , transaction=required)
INSERT/UPDATE some records in SQLDB(transaction=supported)
Finish Sequence A ( transaction should stop here)
UPDATE Oracle DB ( Execute SQLTask, transaction=not supported)
If (Certain_Field_Value = 'B')
Lookup Data in SQL DB with values from Oracle (transaction=not supported)
DO Sequence B (Start a Transaction , transaction = required)
INSERT/UPDATE some records in SQLDB (transaction=supported)
Finish Sequence A ( transaction should stop here)
UPDATE Oracle DB ( Execute SQLTask, transaction=not supported)
If (Certain_Field_Value = 'C')
------------
------------
End ForEach Loop
*************************************
My requirements are that I want separate transaction for each Sequence A, B, C, etc... If Sequence A transaction fails, the other should still be continuing with another transaction.
But I am getting an error regarding the OLEDB Error in next Task (e.g in Certain_Field_Value = 'B') "Lookup Data in SQL DB with values from Oracle ", the error message is ".......Distributed transaction completed. Either enlist this session in a new transaction or the NULL transaction. ".
What is it that I am doing wrong?
Regards
KyawAM
I'm getting this error:
The operation could not be performed because the OLE DB provider 'SQLOLEDB' was unable to begin a distributed transaction.
[OLE/DB provider returned message: New transaction cannot enlist in the specified transaction coordinator. ]
OLE DB error trace [OLE/DB Provider 'SQLOLEDB' ITransactionJoin::JoinTransaction returned 0x8004d00a].
http://support.microsoft.com/kb/839279 this didn't help
any suggestions?
I am executing a stored procedure something like this
Create Procedure TEST
@test1
@test2
AS
BeGIN TRANSACTION ONE
SELECT...
UPDATE..
....
....
....
TRUNCATE
etc and lot of Select,update and delete statements like this
.....
COMMIT TRANSACTION ONE
The Block of code which I have b/w BEGIN TRANSACTION AND COMMIT TRANSACTION ..Will it be rolled back
if it encounters any errors in the SELECT,UPPDATE,DELETE ..statements which I have with the transaction one.
IF not How do I roll back if it encounters any erros b/w the BEGIN TRANSACTION and END TRANSACTION.
Thanks
micky
Hi all,
In my ASP application, I've been using this code:
----------------------------------------------
dim conn, connectionstring
connectionstring= "Provider=SQLOLEDB.1; Data Source = blahblah; Initial Catalog = abc; User Id = osss; Password=xxx"
set conn = server.CreateObject("adodb.connection")
conn.open connectionstring
----------------------------------------------
It's just basically to set up the connection to the SQL server, it works on my other pages, but on a few pages, the last line (conn.open connectionstring) triggers this error:
"Microsoft OLE DB Provider for SQL Server error '8004d00a'
New transaction cannot enlist in the specified transaction coordinator. "
I've never encountered this error before and I couldn't think of any solution... please help!!!
Thanks so much,
Annie
I had thought that if any statement failed within a BEING TRANS .. COMMIT TRANS block, then all the statements would be rolled back. But I am seeing different behavior (SQL Server 2000 8.00.2039)
For instance, run these statements to set up a test:
--DROP TABLE testTable1
--DROP TABLE testTable2
CREATE TABLE testTable1 (f1 varchar(1))
CREATE TABLE testTable2 (f1 varchar(1))
CREATE UNIQUE INDEX idx_tmptmp ON testTable1 (f1)
insert into testTable1(f1) values ('a')
So table testTable1 has a unique index on it..
Now try to run these statements:
--DELETE FROM testTable2
BEGIN TRANSACTION
insert into testTable1(f1) values ('a')
insert into testTable2(f1) values ('a')
COMMIT TRANSACTION
SELECT * FROM testTable2
..the first insert fails on the unique index.. but the second insert succeeds. Shouldn't the second insert roll back? How can I make two operations atomic?
Hi,On My local SQL server I have added a linked server to another SQLserver (remoteserver) in another Windows NT Domain.When I run this codeselect count(*) from remoteserver.mosaics.dbo.LocationThis works fine.However when I usebegin transactionselect count(*) from remoteserver.mosaics.dbo.LocationIt errors out saying thatThe operation could not be performed because the OLE DB provider'SQLOLEDB' was unable to begin a distributed transaction.New transaction cannot enlist in the specified transactioncoordinator. ]OLE DB error trace [OLE/DB Provider 'SQLOLEDB'ITransactionJoin::JoinTransaction returned 0x8004d00a].My question is even though I am just reading data from theremoteserver, why does the local transaction get promoted to adistributed transaction.Any help will be grately appreciated.TIA...Rohit
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I am trying transfer data from Back Office Server to Head Office using DTS. It is failing in few stores, rest of the store it is OK
Configuration
Head office :Windows 2003 SP1 and Sql Server 2000 SP3
Failing Store:Windows 2003 SP2 and SQL SERVER 2005
Successful Store :Windows 2003 SP2 qnd SQL SERVER 2000
At Store: Setting for MSDTC
Log on Account for MSDTC Service : Network Service
Network DTC Access = True
Allow Inbound = True
Allow Outbound = True
No Authentication Required = True
TurnOffRPCSecurity = 1
port Ranges for RPC = 5000- 5100
The error Message is as follows:
(Microsoft Data Transformation Services (DTS) Package (8004d00a): Connection 'Head Office SQL Server' for Task 'DTSTask_DTSDataPumpTask_1' does not support joining distributed transactions or failed when attempting to join. Unable to enlist in the transaction.
) (Microsoft OLE DB Provider for SQL Server (8004d00a): New transaction cannot enlist in the specified transaction coordinator. )
If any one can help me, that will be great!!! Thanks in advance
Shiny
With the function below, I receive this error:Error:Transaction count after EXECUTE indicates that a COMMIT or ROLLBACK TRANSACTION statement is missing. Previous count = 1, current count = 0.Function:Public Shared Function DeleteMesssages(ByVal UserID As String, ByVal MessageIDs As List(Of String)) As Boolean Dim bSuccess As Boolean Dim MyConnection As SqlConnection = GetConnection() Dim cmd As New SqlCommand("", MyConnection) Dim i As Integer Dim fBeginTransCalled As Boolean = False
'messagetype 1 =internal messages Try ' ' Start transaction ' MyConnection.Open() cmd.CommandText = "BEGIN TRANSACTION" cmd.ExecuteNonQuery() fBeginTransCalled = True Dim obj As Object For i = 0 To MessageIDs.Count - 1 bSuccess = False 'delete userid-message reference cmd.CommandText = "DELETE FROM tblUsersAndMessages WHERE MessageID=@MessageID AND UserID=@UserID" cmd.Parameters.Add(New SqlParameter("@UserID", UserID)) cmd.Parameters.Add(New SqlParameter("@MessageID", MessageIDs(i).ToString)) cmd.ExecuteNonQuery() 'then delete the message itself if no other user has a reference cmd.CommandText = "SELECT COUNT(*) FROM tblUsersAndMessages WHERE MessageID=@MessageID1" cmd.Parameters.Add(New SqlParameter("@MessageID1", MessageIDs(i).ToString)) obj = cmd.ExecuteScalar If ((Not (obj) Is Nothing) _ AndAlso ((TypeOf (obj) Is Integer) _ AndAlso (CType(obj, Integer) > 0))) Then 'more references exist so do not delete message Else 'this is the only reference to the message so delete it permanently cmd.CommandText = "DELETE FROM tblMessages WHERE MessageID=@MessageID2" cmd.Parameters.Add(New SqlParameter("@MessageID2", MessageIDs(i).ToString)) cmd.ExecuteNonQuery() End If Next i
' ' End transaction ' cmd.CommandText = "COMMIT TRANSACTION" cmd.ExecuteNonQuery() bSuccess = True fBeginTransCalled = False Catch ex As Exception 'LOG ERROR GlobalFunctions.ReportError("MessageDAL:DeleteMessages", ex.Message) Finally If fBeginTransCalled Then Try cmd = New SqlCommand("ROLLBACK TRANSACTION", MyConnection) cmd.ExecuteNonQuery() Catch e As System.Exception End Try End If MyConnection.Close() End Try Return bSuccess End Function
Hello, I've a problem with a software developed in C# with the framework 2.0. This is the error I receive : The operation could not be performed because OLE DB provider "SQLNCLI" for linked server "XXX_LINKED_SERVER" was unable to begin a distributed transaction. OLE DB provider "SQLNCLI" for linked server "XXX_LINKED_SERVER" returned message "No transaction is active.". If I try directly to restart the process, it works fine. Is there someone who can help me ? This is the process 1. In C# --> Call of a Query : select from the linked server (db in sql 2005) and insert into a table SQL 2005 2. In the C# --> using (TransactionScope scope = new TransactionScope()) and insert in a table in SQL 2005 which is link server Thank in advance.
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