Hi Everyone,
In the data flow task, i have thosands of rows flowing, now just before inserting these rows into a table, i want to delete some rows in the destination table. For this, if i use the oledb command, then it will run several times. I think a script can do it but I want to avoid it because it would be an inefficient affair.
Please post your suggestions on this.
Regards,
Manu
I am using SQL 2005 SSIS. I am joining several large tables and then the move result into another table in the same database.
I would like know which method is faster:
Use Execute SQL Task to insert the result set to the target table
Use the Data Flow Task to insert the result set to the target table. (Use OLE DB source to execute SQL command and then use the SQL destination)
Could you tell me why then other is slower?
Thanks.
I have a package that used to work fine, but after I imported it into a different existing solution and tried to run it, it always stalls during the data flow task at the very end.
It will run through and process all the rows and insert them into the destination except for the last chunk. The task blocks eventually all turn green as well, but then it never proceeds to the next task after the data flow. Looking at the Progress tab for the data flow task, I get the following:
Progress: Pre-Execute - 100 percent complete
[DTS.Pipeline] Information: Execute phase is beginning.
[DTS.Pipeline] Information: Post Execute phase is beginning.
Progress: Post Execute - 0 percent complete
Then it just stays at 0 percent for Post Execute. The program doesn't hang or anything, it just doesn't progress at all. I also just checked and I run the package from its original solution and it is now exhibiting the same behavior as well.
Any ideas what might be causing this or something to do to try and figure it out or at least get more information about what might be causing it?
Thanks.
Hi
I have an application like fetching records from the DataBase(MS Access 2000) and results i have to use in Script Task. At present i have used the record fetching query,connection string in Script itself. I would like to use in Independently. Is there any Tools like (Control Flow Tools like Execute SQL Task) are there to fetch the result set from Acccess and can use the fetching results in Script Task....
Thanks & Regards
Deepu M.I
Hi,
I'm trying to implement an incremental data pull (Oracle to SQL) based on Andy's blog:
http://sqlblog.com/blogs/andy_leonard/archive/2007/07/09/ssis-design-pattern-incremental-loads.aspx
My development machine is decent: 1.86 GHz, Intel core 2 CPU, 3 GB of RAM.
However it seems the data flow task gets hung whenever I test the package against the ~6 million row source, as can be seen from these screenshots. I have no memory limitations on the lookup transformation. After the rows have been cached nothing happens. Memory for the dtsdebug process hovers around 1.8 GB and it uses 1-6 percent of CPU resources continuously. I am not using fast load to insert new records into my sql target table. (I am right clicking Sequence Container 3 and executing this container NOT the entire package in the screenshots)
http://i248.photobucket.com/albums/gg168/boston_sql92/1.jpg
http://i248.photobucket.com/albums/gg168/boston_sql92/2.jpg
http://i248.photobucket.com/albums/gg168/boston_sql92/3.jpg
http://i248.photobucket.com/albums/gg168/boston_sql92/4.jpg
http://i248.photobucket.com/albums/gg168/boston_sql92/5.jpg
http://i248.photobucket.com/albums/gg168/boston_sql92/6.jpg
The same package works fine against a similar test table with 150k rows.
http://i248.photobucket.com/albums/gg168/boston_sql92/7.jpg
http://i248.photobucket.com/albums/gg168/boston_sql92/8.jpg
The weird thing is it only takes 24 minutes for a full refresh of the entire source table from Oracle to the SQL target table.
Any hints,advice would be appreciated.
I have a table with five entries. For each row read in that table I want to pass the value
to a data flow task to be used to set the filename in a flat file connection.
Thanks.
David
Hi,
I am trying to create a simple BI Application for SSIS. In Visual Studio 2005 I just get a Data Flow Task from the toolbar and add it to the project. When I double click it I get the following error:
The task with the name "Data Flow Task" and the creation name "DTS.Pipeline.1" is not registered for use on this computer.
Then when I try to delete it it gives this other error:
Cannot remove the specified item because it was not found in the specified Collection.
I am creating this application in an administrator account in this computer, so I doubt the problem is related to permissions. I am running SQL Server 2005 and Visual Studio 2005 in WinXP Tablet PC Edition.
Any suggestions why this is happening and how to fix it?
SSIS Newbie Question:
I have a simple Control Flow setup that checks to see if a particular table exists. If the table does not exists, the table is created in an alternate path, if it does exist, the table is truncated before moving to a file import Data Flow that uses an OLE DB Destination to output the imported data.
My problem is, that I get OLE DB package errors if the table the OLE DB Destination Container references does not exist when I load the package.
How can I over come this issue? I need to be able to dynamically create the table in an earlier step, then use that table to import data into in a later step in the workflow.
Is there a switch I can use to turn off checking in the OLE DB Destination Container so that it will allow me to hook up the table creation step?
Seems like this would be a common task...
Steps:
1. Execute SQL Task to see if the required table exists
2. Use expresions to test a variable to check the results of step 1
3. If table exists, truncate the table and reload it from file in Data Flow using OLE DB Destination
4. If table does not exist, 1st create it, then follow the normal Data Flow
Can someone help me with this?
Signed: Clueless with a deadline approaching...
I have a stored procedure that is executed via a sql script task that returns a full result set. I map this result set to a variable or object type. Is there a way to use this variable as a data source in a subsequent data flow task?
A.
Hi,
I'm trying to get a record count out of a databse using OLE DB Source and row count tasks but keep getting an error. I set up a variable as int32 and select the variable name in the row count task and when I go to the Input Columns tab to select a field to count, it gives me this error:
Error at Data Flow Task[Row Count[505]]: The component "Row Count" (505) has forbidden the requested use of the input column with lineage ID 32.
I don't even know what this means?
thanks,
Dear all:
I had got the below error when I execute a DELETE SQL query in SSIS Execute SQL Task :
Error: 0xC002F210 at DelAFKO, Execute SQL Task: Executing the query "DELETE FROM [CQMS_SAP].[dbo].[AFKO]" failed with the following error: "The transaction log for database 'CQMS_SAP' is full. To find out why space in the log cannot be reused, see the log_reuse_wait_desc column in sys.databases". Possible failure reasons: Problems with the query, "ResultSet" property not set correctly, parameters not set correctly, or connection not established correctly.
But my disk has large as more than 6 GB space, and I query the log_reuse_wait_desc column in sys.databases which return value as "NOTHING".
So this confused me, any one has any experience on this?
Many thanks,
Tomorrow
Hi,
I created a package with SQL 2005. The package gets the Access DB and then inserts it into SQL Server.
If I open the package in .NET, I can see the SQL Task and Data Flow Task. The SQL Task has a property sqlstatementsource, which has the necxessary SQL code to create the tables.
How can I tell the SQL Task to recompile the SQL code if I give it another DB name, because the tables differ and don't map in the Data Flow Task
Thanks
I have following requirement. From OLE-DB source I am getting IDS. Then lookup with some master data. Now I have only matching IDs. Now I need find some filed(say Frequency from some table for each above id). I already write stored procedure for same where I am passing ID as parameter.Which is working fine when I run it SQL server management studio.
Query is sort of
Select field1,fiel2... from table 1 where id = @id
@id is each ID from lookup
Now I want to call this stored procedure in Data flow. I tried it using OLE DB command but it did not return output of stored procudre. I am getting output same what ever I am passing input.
Is there way to do this? In short my requirement is execute parametrized select statement using data flow trasformation component.
Hi
I have a data flow task. If it completes I should update a flag in the database. So How I can I know if the
data flow task has completed or not.
Thanks
Sai
I have a table which has been loaded from various source feeds. The SourceId relates to the source name and the SourceCompanyId is the sources primary key for the company. I am basically trying to create one row with all the SourceCompanyIds in my column headers. What data flow tasks would be necessary in SSIS?
The structure of the final table is:
CREATE TABLE [dbo].[Company](
[CompanyId] [int] IDENTITY(1,1) NOT NULL,
[CompanyName] [varchar](75),
[CIK] [varchar](10),
[Ticker] [varchar](10),
[Source1CompanyId] [int] NULL,
[Source2CompanyId] [int] NULL,
[Source3CompanyId] [int] NULL,
[Source4CompanyId] [int] NULL,
[Source5CompanyId] [int] NULL,
[Source6CompanyId] [int] NULL,
CONSTRAINT [PK_Company] PRIMARY KEY CLUSTERED
(
[CompanyId] ASC
)WITH (IGNORE_DUP_KEY = OFF) ON [PRIMARY]
) ON [PRIMARY]
=================================
The table in which contains all the company data
CREATE TABLE [dbo].[SourceCompany](
[SourceId] [int] NOT NULL,
[SourceCompanyId] [varchar](10) ,
[SourceCompanyName] [varchar](75),
[CIK] [varchar](10),
[Ticker] [varchar](10),
CONSTRAINT [PK_SourceCompany] PRIMARY KEY CLUSTERED
(
[SourceId] ASC,
[SourceCompanyId] ASC
)WITH (IGNORE_DUP_KEY = OFF) ON [PRIMARY]
) ON [PRIMARY]
Hi All,
I want to export data from SQL Server2005 to an Excel spreadsheet thru "Data Flow Task". I am using OLE DB for SQL Server for the source connection and a Connection To Excel as my destination source. The Excel spreadsheet (2003) exists and has the first row with column names. I don't have any warnings before trying to execute.
The SQL datable fileds are
i) ID - Int
ii) RefID
iii) txtRemarks - nvarchar(MAX)
iv) ddlWaterLevel - nvarchar(50)
While executing the tasks, I got the error
Error: 0xC0202025 at Data Flow Task, Excel Destination [427]: Cannot create an OLE DB accessor. Verify that the column metadata is valid.
Error: 0xC004701A at Data Flow Task, DTS.Pipeline: component "Excel Destination" (427) failed the pre-execute phase and returned error code 0xC0202025.
After analysing I found in the DataFlow --> Excel destination --> Advanced Editor for Excel Destination, the default data type for txtRemarks shows as "Unicode string [DT_WSTR]". But this is supposed to be "Unicode text stream [DT_NTEXT]". Even if I change the data type in the design time, It doesn't accept.
Please do help me out.
thanks
Sanra
I need to call a stored procedure to insert data into a table in SQL Server from SSIS data flow task.
I am currently trying to use OLe Db Destination, but I am not sure how to map inputs to OLE DB Destination to my stored procedure insert.
Thanks
I have a fuzzy lookup in a data flow but this data flow never gets pass pre-execute phase. What is the problem?
Thanks
Hi. I am trying to extract the data returned from a store procedure to a flat file. However, it fail to execute this package in the OLE DB Source.
I select the SQL Command in the Data Access Mode, then use:
USE [SecurityMaster]
EXEC [dbo].[smf_ListEquity]
It runs ok in the Preview, but not in the Run. Then the system returns during executing the package:
Error: 0xC02092B4 at Load TickerList, OLE DB Source [510]: A rowset based on the SQL command was not returned by the OLE DB provider.
Error: 0xC004701A at Load TickerList, DTS.Pipeline: component "OLE DB Source" (510) failed the pre-execute phase and returned error code 0xC02092B4.
Please give me some helps. Thanks.
Hi all, I am getting the following when trying to import text coloums from execl to SQL server 2005. Any ideas?
Error at Data Flow Task [Destination] Coloums "blar" and "Blar_name" cannot convert between unicode and non-unicode sting types.
Any help would be great.
Thanks
Dave
Dave Dunckley says there is a law for the rich and a law for the poor and a law for
Dirty Davey.
Hi frns,
I am new to SSIS. I need some help in designing the below dataflow task.
-- Teacher creates several tasks and each task is assigned to multiple students
-- The teacher table contains contains all the tasks created a every teacher
use ods
go
create table teacher
(
yr int,
tid int,
tname varchar(20),
taskid int
)
insert into teacher values(2007,101,'suraj','task1')
insert into teacher values(2007,101,'suraj','task2')
insert into teacher values(2007,102,'bharat','task3')
insert into teacher values(2007,103,'paul','task4')
insert into teacher values(2007,103,'paul','task5')
insert into teacher values(2007,103,'paul','task6')
-- Teacher "suraj" has created 2 tasks
-- Teacher "bharat" has created 1 task
select * from ods..teacher
yr tid tname taskid
============================
2007 101 suraj 1111
2007 101 suraj 1122
2007 102 bharat 2222
-- Students table contains studentid(sid),teacherid(i,e tid ) & taskid
drop table students
create table students
(
yr int,
sid varchar(10),
tid int,
taskid varchar(10)
)
truncate table students
insert into students values(2007,'stud1',101,'task1')
insert into students values(2007,'stud1',101,'task2')
insert into students values(2007,'stud2',101,'task1')
insert into students values(2007,'stud2',101,'task2')
--Note : stud1,stud2 comes under teacher with tid "101"
insert into students values(2007,'stud3',102,'task3')
-- Note : stud3 and stud4 comes under teacher with tid "102"
insert into students values(2007,'stud4',103,'task4')
insert into students values(2007,'stud4',103,'task5')
insert into students values(2007,'stud4',103,'task6')
insert into students values(2007,'stud5',103,'task4')
select * from students
yr sid tid taskid
----------------------------
2007 stud1 101 task1
2007 stud1 101 task2
2007 stud2 101 task1
2007 stud2 101 task2
2007 stud3 102 task3
2007 stud4 103 task4
2007 stud4 103 task5
2007 stud4 103 task6
2007 stud5 103 task4
Now in my target table i need to load the data in a such a way that
use targetdb
go
drop table trg
go
create table trg
(
yr int, -- data should load from teacher.yr
tid int,
taskid int(20),
cnt int
)
Mapping in target column and value to be loaded
==================================================
yr -- teacher.yr
tid -- teacher.id
taskid -- this need to start a new sequence of numbers starting from 1 for each teacher and dont want the task id to be copied as it is.
cntofstudents -- need to count no of students from "students" table for a given teacher and for his assignment
For example for teacherid "101" and taskid "task1" there are 2 students
again for the same teacher "101" and taskid "task2" there are 2 students
For teacher "102" and taskid "task3" there is only 1 student
Similary for teacher "103"
Relation
========
Teacher table | Students Table
yr | yr
tid | tid
After i run the ETL the data should look as follows :
insert into trg values(2007,101,1,2)
insert into trg values(2007,101,2,2)
insert into trg values(2007,102,1,1)
insert into trg values(2007,103,1,2) -- task4 is created by teacher "103" and assigned to 2 students stud4 and stud5
insert into trg values(2007,103,2,1) -- task5 is created by teacher "103" and assigned to 1 student i.e stud4
insert into trg values(2007,103,3,1) -- task6 is created by teacher "103" and assigned to 1 student i.e stud5
Note : If u observer the values in 3rd column of the trg table, instead of directly mapping the taskid we need to generate a separate sequence for every teacher.
BottomLine : for each and every task created by each teacher there should be a unique record along with the count of students in "STUDENTS" table
Can anyone help me out in designing the Data Flow task for this Functionality.
Thanks,
Manu
Hi there. I'm trying to learn SSIS, please, help me. I have 2 questions:
1)
There are 2 databases on 2 different servers. I need to get data from Table1(database1) and put it to Table2(database2). But I have to insert rows, which ID is not exists in Table2. How Can I do necessary filter?
2)
In the OLE DB DataSource Component I have used SQL Command(it's simplified):
declare @TmpTable TABLE (WorkCode int not null);
INSERT INTO @TmpTable (WorkCode)
select WorkCode
from Table1
SELECT WorkCode
FROM @TmpTable
SSIS Package works without any exception. But there is no any inserted record in destination table. If I try similar query without temporary table - it works good. Why?
Hi,
I have SQL Server 2005 Express edition on my machine. On an SSIS project in BIDS, when i drag a "Data Flow Task" to the package it returns the following error:
The designer could not be initialized. (Microsoft.DataTransformationServices.Design)
Does this has anything to do with the fact that i don't have SSIS installed on my machine?
I thought that SSIS was only needed (on my machine) for the runtime, just to run the packages. To create and edit the pachages i need to install SSIS on my machine too? this doesn't makes sense, maybe it's another problem.
Can anyone help me on this?
Thank you,
Rafael Augusto
I am having problems with the Data Flow task. It does not even show up in the list of items to drop into the SSIS project.
If I go to the Data Flow tab and hit create, I get the follow error. I have tried repairing and reinstalling, but nothing seems to clear up the error. Without rebuilding my machine, is there anyone who knows how to get the Data Flow Task reinstalled properly?
Thanks
Wayne
TITLE: Microsoft Visual Studio------------------------------Registration information about the Data Flow task could not be retrieved. Confirm that this task is installed properly on the computer. ------------------------------ADDITIONAL INFORMATION:TaskHost "{C3BF9DC1-4715-4694-936F-D3CFDA9E42C5}"' is not installed correctly on this computer. (Microsoft.DataTransformationServices.Design)For help, click: http://go.microsoft.com/fwlink?ProdName=Microsoft%u00ae+Visual+Studio%u00ae+2005&ProdVer=8.0.50727.762&EvtSrc=Microsoft.DataTransformationServices.Design.SR&EvtID=TaskHostNotInstalled&LinkId=20476------------------------------BUTTONS:OK------------------------------
I have a simple data flow task setup...
2 ADO.NET connection managers, each referencing a DSN pointed to a Unidata database.
2 DataReader sources, each using a single ADO.NET connection managers, running a simple SELECT statement from a table.
I have a Union All transform setup to merge the data and write to a OLE DB Destination (SQL05 database)
When I run the package, each source will validate, but only one will execute. The other source will do nothing. The data source will be colored yellow, and will just sit there. The package will just sit, almost like it is waiting for input.
This behavior is not consistent, however. It varies which data source will hang, pretty much 50-50. About 25% of the time, both sources will execute, and all rows will be written to the destination.
Any help is appreciated.
thanks
I have a Windows XP X64 machine with SQL 2005 Developer and VS 2005 Team Edition for Architects on it. For the most part it appears that all normal VS and SQL functions are working properly with the exception of SSIS. If I open the developer studio and drag a Data Flow Task onto the design surface I get the message below. I have tried doing an unistall and reinstall of Integration Services as well as a repair on VS 2005 with no success. I've searched the web and newsgroups and can't find any mention of the problem I'm having. Any help greatly appreciated.
View 18 Replies View RelatedHi All,
I wanna know if we can have more than one "OLEDB Destination" within a Data Flow Task, I want to use the same data flow and write to two different tables in a database with some changes. If we cannot do this within the same data flow what is the best way to do this.
Thanks
How can I debug data flow task. From this article (http://www.databasejournal.com/features/mssql/article.php/3567961) and this video (http://www.jumpstarttv.com/Media.aspx?vid=3) I found that when we are executing the task, the data count will be shown along with color coded task but when I debug the package, no count is shown. I have SQL and source and flat file as destination. There is nothing stored in the destination file but the sql script returns the data.
Thanks.
I was working all day making changes to my 3MB package. I was adding a large number of transforms that were copied-and-pasted from elsewhere in the same data flow task.
All was going well. I even took the time to have SSIS lay out the task again (1/2 hour). Suddenly I started receiving some strange errors:
After the layout, I noticed two stray components 'way off in the upper right corner. I found that one of them had a duplicate name to a component which had been added hours ago. Even after deleting it, I got "duplicate name" errors.
I copied three components in one selection, and when I tried to paste them, got the error "can't initialize component on paste". I tried them one at a time, but got the same error.
I got errors about COM failures due to marshalling to another thread
I then exited Visual Studio and started it again. To my great surprise, the data flow task I was working on was still there, but was completely empty.
Comparing what I'm left with to my last version in source control, I find that the entire pipeline element is missing from the DTS: ObjectData element!
I'm developing a real love/hate relationship with SSIS. It varies from one day to the next. Guess what kind of day this is!
HI, I HAVE A NEW PROBLEM...HOPE SOMEONE KNOWS WHAT THE $#%#$ IS HAPPENING. HERE IT´S THE THING: I´M USING A DATA FLOW TASK TO READ DATA FROM AN ORACLE SERVER AND TRANSFER THE INFO TO MY SQL 2005 SERVER, THE SOURCE IS AVAILABLE AND THE CONNECTION IS WORKING, I'M USING A DATA READER SOURCE TO CONNECT AND EXTRACT. I´VE PUT THIS DTS IN A JOB AND IT WAS OK, IT HAD BEEN RUNNING OK FOR ALMOST A MONTH BUT SUDDENLY HIS MORNING IT FAILED WITH THE FOLLOWING ERROR:
SSIS package "SAZSIE_CargaVentasSeguros (1).dtsx" starting.
Information: 0x4004300A at Extrae SAZ_GranoO_New, DTS.Pipeline: Validation phase is beginning.
Information: 0x4004300A at Extrae SAZ_GranoO_New, DTS.Pipeline: Validation phase is beginning.
Information: 0x40043006 at Extrae SAZ_GranoO_New, DTS.Pipeline: Prepare for Execute phase is beginning.
Information: 0x40043007 at Extrae SAZ_GranoO_New, DTS.Pipeline: Pre-Execute phase is beginning.
Information: 0x4004300C at Extrae SAZ_GranoO_New, DTS.Pipeline: Execute phase is beginning.
Error: 0xC0047062 at Extrae SAZ_GranoO_New, SAZ_GranoONew [421]: System.NullReferenceException: Object reference not set to an instance of an object.
at Microsoft.SqlServer.Dts.Pipeline.DataReaderSourceAdapter.PrimeOutput(Int32 outputs, Int32[] outputIDs, PipelineBuffer[] buffers)
at Microsoft.SqlServer.Dts.Pipeline.ManagedComponentHost.HostPrimeOutput(IDTSManagedComponentWrapper90 wrapper, Int32 outputs, Int32[] outputIDs, IDTSBuffer90[] buffers, IntPtr ppBufferWirePacket)
Error: 0xC0047038 at Extrae SAZ_GranoO_New, DTS.Pipeline: The PrimeOutput method on component "SAZ_GranoONew" (421) returned error code 0x80004003. The component returned a failure code when the pipeline engine called PrimeOutput(). The meaning of the failure code is defined by the component, but the error is fatal and the pipeline stopped executing.
Error: 0xC0047021 at Extrae SAZ_GranoO_New, DTS.Pipeline: Thread "SourceThread0" has exited with error code 0xC0047038.
Information: 0x402090DF at Extrae SAZ_GranoO_New, OLE DB Destination [1022]: The final commit for the data insertion has started.
Information: 0x402090E0 at Extrae SAZ_GranoO_New, OLE DB Destination [1022]: The final commit for the data insertion has ended.
Information: 0x40043008 at Extrae SAZ_GranoO_New, DTS.Pipeline: Post Execute phase is beginning.
Information: 0x40043009 at Extrae SAZ_GranoO_New, DTS.Pipeline: Cleanup phase is beginning.
Information: 0x4004300B at Extrae SAZ_GranoO_New, DTS.Pipeline: "component "OLE DB Destination" (1022)" wrote 19522 rows.
Task failed: Extrae SAZ_GranoO_New
Warning: 0x80019002 at SAZSIE_CargaVentasSeguros: The Execution method succeeded, but the number of errors raised (3) reached the maximum allowed (1); resulting in failure. This occurs when the number of errors reaches the number specified in MaximumErrorCount. Change the MaximumErrorCount or fix the errors.
SSIS package "SAZSIE_CargaVentasSeguros (1).dtsx" finished: Failure.
THE DATA HAS BEEN COPIED INTO MY DESTINATION TABLE, BUT THE PACKAGE ENDS IN AN ERROR, WHAT IS THE PROBLEM WITH THIS???
PLASE SOMEONE !!!!
THANKS!!!!!!!
Hi,
I just wanna ask:
I'm creating an SSIS package, a Data Flow Task. I have used OLEDB Source connected to a SQL Server Destination. Now in my OLEDB Source, I have this SQL statement
SELECT FirstName, LastName, Age FROM Employees WHERE (Age > 10) AND (Age < 95)
But what I want is to have the last name and first name concatenated and in proper case(capitalize first letter of the firstname and surname). I also want to TRIM or remove the blank spaces of the field in my SQL statement. How I be able to do this?
I tried using proper(), trim() and ucase() like in MSAccess but no success.
Please help. Thanks in advance.
I have a fairly simple data flow task that loads data from one table (OLE DB Source) into another table (OLE DB Destination). The data type for one of the pairs of columns is nVarChar(120) and it contains version information that looks like a decimal. When I run the export, the destination has a trailing zero added after the decimal point as if it were a numeric column which invalidates our comparisons (string 1.0 is not the same as string 1.00). There is no cast or convert done to this column, it is a straight copy. Any ideas what could be causing this or how to fix?
View 6 Replies View RelatedI have a data flow task which has around 5 data flows (like the 2nd diagram shown here). These 5 simple flows with just a row count transformation in between. Now, I want to fail the entire task immediately even if one of the data flows failed. Right now if one flow fails the remaining flows fails after a long time, not immediately. How can I make it fails immediately.
The other I would like to do is Can I place these 5 data flows in a transaction, so that if one data flow fails, others data flows also roll backs? ( I assume its not possible)
Thanks