Data Flow Inside For Each Loop - Error Handling
Jun 23, 2006
Hopefully this is an easy question:
Inside of a for each loop (looping through an ADO record set of objects to import) I have a data flow task (along with many other processes).... if the dataflow task suceeds I log success in a table. If it errors I want it to fail the dataflow task (which will fire off my Event Handler for that data flow and log the failure, email etc) BUT I want it to continue the loop - I can't seem to figure out how to get the data flow object not to fail the whole loop. If any other objects inside the foreach, other than the data flow, fail I would like the whole loop to fail. Also if possible (but not a requirement) I would like it to have a threshold where if the data flow fails X variable times it will fail the package.
I am having difficulty how to not fail the loop when the import data fails..... just looking for a simple "on error next" type logic for that specific object in the foreach but not the rest. Thanks in advance for the help/advice.
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Sep 11, 2007
I am trying to execute a SP like below in OLEDB source in data flow... and this statement include the insert stament ( row by row transaction).. I would like to creat an error hadling logic so that if the trasaction fail to insert the row then ignore that particular row then, move to the next row without stopping the whole process.. how can i do this?
exec usp_Inert_Registration_Episodes_Assessments
@Unique_ID=?,
@Gender_Cd=?,
@Birth_Date=?,
@Race_Ind=?,
@Ethnicity_Cd=?,
@Registration_Dt=? ,
--
--@Object_Key
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Apr 18, 2008
I have a For Each Loop which selects files with a certain naming convention, performs a data transformation on each one, loading it into a SQL Server db.
I want to add error handling so that if a file fails processing at any step of the loop, error handling moves the file to a new directory and picks up the next file and continues processing.
I tried playing around with error handling at the For Each Loop level. But when the process failed on a file (with an incorrect format), the file couldn't be moved because it was "locked by another process."
Is this possible within a For Each Loop? If not, what other approach could I take?
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Jun 19, 2006
All,
Is it possible to passing variable at row level within a data flow? If so, what transformation should use?
Thanks
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Oct 30, 2006
We are designing an ETL solution for a BI project using SSIS.
We need to load a dimension table from a source DB into the DW; inside the DW there are two tables for each source dimension table: a current dimension table and a storical dimension table.
The source table includes technical columns that indicate if each record was processed correctly by ETL procedures.
Each row in the source table can be a new record, or an exisisting one. If it's a new record, a corresponding new record should be inserted into the current dimension table of the DW; if it's an exisisting one, a new record should be inserted in the storical dimension table and the existing record in the current dimension table should be updated.
Furthermore for each record we need to update the source table with an error code. If the record was processed with succes the code is zero, otherwise it contains an error code.
I try to use a single data flow task, using the 'ole db command trasformation' task for managing update and 'ole db destination' task for managing insert.
The problem is that some insert and update should be executed inside a single transaction, for each record; for example if the source contains a new record I should insert the record in the current dimension table and update the source record with error code zero if every think goes fine.
There is some way to group task in the data flow pane in a single transaction ?
There is a better way to do that ?
Cosimo
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Mar 14, 2008
hi,
I have an aggregate transformation in a dataflow task.
It has only 1 output value.
I'm trying to assign this value to a user variable, but I can't figure out how to do that.
i can hack something silly together - like write the value to the db, and then get it out, but I there has to be an easier way..
Thanks a lot.!
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Dec 20, 2007
I have two tasks on a control flow. First task is Execute SQL task which drop an index. Second one is a Data Flow task. I also have an error handler for packcage_onerror. Because there is no index in the database, the first task rasies an error and package on error catches the error. The precedence constraint for the Data Flow task in "success". I don't expect the data flow task to execute because of the error. But it does. Is this the right behavior because I have already handle the error? I don't want the the job to continue if there is any error. I believe I should raise error in the error handler. Pleae help me how to do this. Thanks
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May 22, 2008
Hi All,
I have a requirement here to import data from XML file to SQL Database. The XML schema contains of various elements and one of the element is recursive ie. Parameter node contains parameter node within it and it can have n number of iterations. I have given the sample schema below:
<xs:element minOccurs="0" name="Parameter">
<xs:complexType>
<xs: sequence>
<xs:element minOccurs="0" name="ID" type="xs: string" />
<xs:element minOccurs="0" name="Description" type="xs: string" />
<xs:element minOccurs="0" name="Type" type="xs: string" />
<xs:element minOccurs="0" name="Parameter">
<xs:complexType>
<xs: sequence>
<xs:element minOccurs="0" name="ID" type="xs: string" />
<xs:element minOccurs="0" name="Description" type="xs: string" />
<xs:element minOccurs="0" name="Type" type="xs: string" />
<xs:element minOccurs="0" name="Parameter">
<xs:complexType>
<xs: sequence>
<xs:element minOccurs="0" name="ID" type="xs: string" />
<xs:element minOccurs="0" name="Description" type="xs: string" />
<xs:element minOccurs="0" name="Type" type="xs: string" />
</xs: sequence>
</xs:complexType>
</xs:element>
<xs:element minOccurs="0" name="Parameter">
...............
</xs: sequence>
</xs:complexType>
</xs:element>
</xs: sequence>
</xs:complexType>
</xs:element>
But all the nodes contain the data which has to be imported to a single table dbo.Parameters. I cannot use Union ALL since i dont know how many iterations I will have in the file. Is there any way to do this operation in Data Flow Task using XML Source? Can anyone help me on this?
Thanks,
Dhileep
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Jul 19, 2007
Hi,
I have tables like the one below for my Stage and dimension tables:
Stage Table
accountid
name
address
Dimension Table
accountkey ---- surrogate key (DW key)
accountid ---- business key (transaction's primary key)
name
address
I used slowly changing dimension to detect the changes for the records inside my Dimension table. But I had a problem when a new record exists in the stage table. The accountkey is set as the primary key and it gets its value from a different table which stores the last account key that was created. I cannot load all the changes unless i have a business key. Is there a way that i can get the "last key" from a different table in the data flow area and then supply it together with the other fields in the new output branch of the slowly changing dimension?
cherriesh
thanks!
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Mar 10, 2008
Hi
Is there any task which helps up to update data inside the data flow task or any method to do the same.....
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Sep 8, 2007
how to pass the variables as the data source in data flow in for each loop( ADO enumerator)?
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Jul 7, 2006
In my Control Flow, I execute a data flow that opens a flat file and populates the file into a recordset.
Back to my Control Flow, I have a ForEach container that uses a ForEach ADO Enumerator. Inside the ForEach, I execute an "Execute SQL Task" that updates a table.
This is where I'm confused, while in the ForEach, I also want to call a Data Flow and use the current record (record in my ForEach) and perform several lookup tasks. Unfortunately, I'm now sure how to use the ForEach record as a source in my Data Flow....What am I missing?
Thanks,
Gary
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Aug 22, 2007
All:
I am sure I am missing something really silly but I am not able to figure out what. The For Each Loop uses an ADO Enumerator and passes variable values to a data flow. In executing the package the loop runs fine but nothing is happening to the data flow. When I move the data flow out of the loop it runs fine. What is going on?
Thanks!
desibull
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Jun 16, 2015
We have created SSIS package to load a text file into a table. Source system shares 10 text files and recently they stopped generating data for one of the text file (comping empty), after few months they will start generating the data for the empty file batch processing.
The Issue here is Data Flow task is getting failed while loading empty text file into table. How to handle this empty file load issue in SSIS package.
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May 16, 2008
Hi,
How do I retrieve the connections (connection managers) collections from Custom Data Flow destination? ComponentMetadata.RuntimeConnectionCollection is empty. I would like to be able to access all the connections defined in the package from the custom data flow task.
I came across code in which it was possible to access the Connections collection using the IDtsConnectionService for custom task (destination). The custom task has access to serviceProvider, whcih can be used to get access to the IDtsConnectionService interface but not the custom data flow task.
Any help appreciated.
Thanks
Naveen
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Jun 5, 2006
I have a package that runs fine by itself. But when I run it inside a Foreach Loop container on a parent package, I got a buffer error after a few loops. Here are a couple of the error lines:
A buffer failed while allocating 49085616 bytes.
The attempt to add a row to the Data Flow task buffer failed with error code 0x8007000E.
I already played around with the Data Flow tasks DefaultBufferMaxRows and DefaultBufferSize properties, and I am still getting the error. Just wondering if there is a memory leak or something with the Foreach Loop task. I havent install SP1. Maybe SP1 fixes this issue?
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Nov 3, 2015
Suppose if I have a “Foreach Loop Container” that iterates over a list. Is it possible to execute different data flow tasks based on the input?
Example : List contains elements L1, L2 & L3.
ForEach Loop Container checks the input. If its L1 then it should execute DF Task1, If L2 then execute
DF Task2 and similarly for L3.
Is it possible to achieve this?
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Feb 15, 2007
Hi,
I'm having trouble with a Script Component in a data flow task. I have code that does a SqlCommand.ExecuteReader() call that throws an 'Object reference not set to an instance of an object' error. Thing is, the SqlCommand.ExecuteReader() call is already inside a Try..Catch block. Essentially I have two questions regarding this error:
a) Why doesn't my Catch block catch the exception?
b) I've made sure that my SqlCommand object and the SqlConnection property that it uses are properly instantiated, and the query is correct. Any ideas on why it is throwing that exception?
Hope someone could help.
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Feb 1, 2004
hello,
anyone for help?
what's the syntax of for.next, do while loop in Stored Proc?
ur help is much appreciated!
thanks,
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Mar 18, 2008
I have a cursor that loops through some records.
Upon an exception being caught (i.e. when inserting a record, it violates integrity constraint), I would like to do my normal exception handling routine and then continue with the loop to the next record.
Is this possible? If so, how do I implement this behavior?
Thanks.
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Oct 23, 2000
I have a loop(while) statement I need to run inside a cursor statement. The loop creates records based on a frequency. The cursor and the loop work but the problem is that the cursor only reads the first record, runs the loop, but then ends. I am pasting the code below. Any help appreciated
declare dbcursor cursor for select uniq_id,account_id,created_by,encounter_id, start_date,date_stopped,sig_codes, ndc_id,modified_by from patient_medication where convert(datetime,start_date) = '10/20/2000' and date_stopped is not null
open dbcursor fetch next from dbcursor into @uniqid,@account_id,@createid,@entcid, @sdate, @edate ,@sig_code, @ndcid, @modid
while (@@FETCH_STATUS <> -1)
begin
select @freq = SIG.sig_frequency FROM SIG where SIG.SIG_KEY = @sig_code
set @hfreq = @freq if @freq = 9 set @freq = 1 set @nodays = datediff(day, @sdate - 1, @edate)
while @cnter < @nodays
begin
while @fcnter < @freq + 1 begin insert into PATIENT_MEDICATION_DISPERSAL_ (uniq_id,account_id, occurance_id, encounter_id, ndc_id, ddate, frequency, sig_code,disp_create_id, disp_mod_id) values (@uniqid,@account_id,@fcnter, @entcid, @ndcid, @sdate, @freq, @sig_code,@createid, @modid )
set @fcnter = @fcnter + 1
set @erdate = @sdate
END
if @hfreq = 9
begin set @fcnter = 1
set @sdate = @sdate + 2
Set @cnter = @cnter + 2
end
else
begin
set @fcnter = 1
set @sdate = @sdate + 1
Set @cnter = @cnter + 1
end
end
end
close dbcursor
deallocate dbcursor
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Apr 4, 2007
Hello,
is it possible to build a loop for the following statement?
CREATE VIEW vwObjects as (
Select 2001 as year, 1 as quarter, id as id
from dbo.objects o
where o.edate >= '20010101' and o.sdate < '20010401'
union
Select 2001 as year, 2 as quarter, id as id
from dbo.objects o
where o.edate >= '20010301' and o.sdate < '20010701'
...
union
Select 2002 as year, 1 as quarter, id as id
from dbo.objects o
where o.edate > '20020101' and o.sdate < '20020401'
...
)
I want a kind of calender for my olap cube, so I can get every active object in a special quarter resp year.
Thank you!
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Aug 27, 2006
Hi,
A very strange thing happened to me. I have a package that includes two For each loop containers. Each container has script tasks, sequence containers, etc. Both are Foreach ADO Enumerator basis. It works without any problems until I changed the position of one of them in the Control flow and added some code in the script task. After these changes I executed the package and both of For each loop containers did not execute the tasks inside of them, any task. However the execution color on the containers was green (success). How can it be?
Your help is much welcome. Thanks in Advance.
João Cruz
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Jun 21, 2001
I'm trying to convert a column from a varchar(14) to float, some of the rows contain some non-numeric characters. I've tried to write a cursor to step through the records, run cast(col1 as float) on each record, then use if @@error <> 0 to capture an error but it doesn't work. It steps through fine but when the cast command fails it ends the execution of the script with "Error converting data type varchar to float."
How can i capture this error without having the script fail? Is there another way to get this done?
Thanks,
Jim
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May 6, 2008
Hi,
When i execute the following set of statements only 8 is getting inserted into table instead 6 and 8.
Create Table BPTest(id int)
Declare @Id Int
Set @Id = 0
While (@Id < 10)
Begin
begin tran
Insert into BPTest values (@id)
if(@Id > 5)
begin
if(@Id % 2 = 0)
begin
print 'true' print @Id
commit tran
end
else
begin
print 'false' print @Id
rollback tran
end
end
Set @Id = @Id + 1
End
Select * from BPTest
drop table BPTest
Please let me know the reason for this.
Thanks in advance
Regards,
K. Manivannan
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Feb 6, 2015
I wanted to insert values in columns as explained in below ex.
I am having a table that contains Column1,Column2,Column3,......,Column10.
Inside my for loop, i am getting Column1 value then Column2 then Column3 values and so on till Column10.
My requirement is that on each iteration,I wanted to insert value of Column1 in field Column1, value of Column2 in field Column2 and so on.
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Jul 20, 2005
I am trying to write a utility/query to get a report from a table. Belowis the some values in the table:table name: dba_daily_resource_usage_v1conn|loginame|dbname|cum_cpu|cum_io|cum_mem|last_b atch------------------------------------------------------------80 |farmds_w|Farm_R|4311 |88 |5305 |11/15/2004 11:3080 |abcdes_w|efgh_R|5000 |88 |4000 |11/15/2004 12:3045 |dcp_webu|DCP |5967 |75 |669 |11/16/2004 11:3095 |dcp_webu|XYZ |5967 |75 |669 |11/17/2004 11:30I need to write a query which for a given date (say 11/15/2004),generate a resource usage report for a given duration (say 3 days).Here is my query:************************************set quoted_identifier offdeclare @var1 intset @var1=0--BEGIN OUTER LOOPwhile @var1<=3 --INPUT runs the report for 3 daysbegindeclare @vstartdate char (10) --INPUT starting dateset @vstartdate='11/15/2004'--builds a range of datedeclare @var2 datetimeset @var2=(select distinct (dateadd(day,@var1,convert(varchar(10),last_batch,101)))--set @var2=(select distinct (dateadd(day,@var1,last_batch))from dba_daily_resource_usage_v1where convert(varchar (10),last_batch,101)=@vstartdate)set @var1=@var1+1 --increments a daydeclare @var5 varchar (12)--set dateformat mdy--converts the date into 11/15/2004 format from @var2set @var5="'"+(convert(varchar(10),@var2,101))+"'"--print @var5 produces '11/15/2004' as resultdeclare @vloginame varchar (50)declare @vdbname varchar (50)--BEGIN INNER LOOPdeclare cur1 cursor read_only forselect distinct loginame,dbname fromdba_daily_resource_usage_v1where convert(varchar (10),last_batch,101)=@var5--??????PROBLEM AREA ABOVE STATEMENT??????--print @var5 produces '11/15/2004' as result--however cursor is not being built and hence it exits the--inner loop (cursor)open cur1fetch next from cur1 into @vloginame, @vdbnamewhile @@fetch_status=0begin--print @var5 produces '11/15/2004' as resultdeclare @vl varchar (50)set @vl="'"+rtrim(@vloginame)+"'"declare @vd varchar (50)set @vd="'"+@vdbname+"'"--processes the cursorsdeclare @scr varchar (200)set @scr=("select max(cum_cpu) from dba_daily_resource_usage_v1 whereloginame="+@vl+" and dbname="+@vd+" and "+"convert(varchar(10),last_batch,101)="+@var5)--set @var3 =(select max(cum_cpu) from dba_daily_resource_usage_v1where--loginame=@vloginame and dbname=@vdbname--and convert(varchar (10),last_batch,101)=@var5)print @scr--exec @scrfetch next from cur1 into @vloginame, @vdbnameend--END INNER LOOPselect @var2 as "For date"deallocate cur1end--END OUTER LOOP************************************PROBLEM:Even though variable @var5 is being passed as '11/15/2004' inside thecursor fetch (see print @var5 inside the fetch), the value is not beingused to build the cursor. Hence, the cursor has no row set.Basically, the variable @var5 is not being processed/passed correctlyfrom outside the cursor to inside the cursor.Any help please.Thanks*** Sent via Developersdex http://www.developersdex.com ***Don't just participate in USENET...get rewarded for it!
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Feb 16, 2008
im trying to do this
declare @count int
set @count=0
while @count<4
begin
set @count=@count+1
select *
from dbo.Categories
where CategoryPID=-1
union()
end
and i get a error
this is not the original code but i want to union all select statements
please help !!!
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Aug 29, 2007
Hello,
Is it possible to use existing data flow components (Merge Join, aggregation,...) in a custom data flow component?
Thanks,
Yoann
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Mar 28, 2008
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
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Apr 12, 2007
Hi everyone,
I've got a Foreach loop container which uses a Foreach ADO Enumerator and works fine.
But problem comes when I launch inside the general loop another Sql Task (select) which sometimes has rows and sometimes hasn't. When it have rows everything is fine the workflow follows fine but when it has not.
I obtain this error (obvioulsy)
[Execute SQL Task] Error: An error occurred while assigning a value to variable "GZon": "Single Row result set is specified, but no rows were returned.".
How to deal with that?
Thanks indeed
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Feb 15, 2008
Hi, I'm trying to loop thru a table and insert records into another table in ssis. So far I have been able to get the data using a execute sql task set up to store the full result set into a variable called data. I then drug a foreach loop container out and selected the foreach ADO enumerator and used my variable data as the ADO object source variable. I then set up a new variable under variable mappings with index 0 to get the collection values. How do I take that variable and update another table using another sql task inside the foreach loop container? Is this possible?
thanks,
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May 12, 2006
I am getting the following error running a data flow that splits the input data into multiple streams and writes the results of each stream to the same destination table:
"This operation conflicts with another pending operation on this transaction. The operation failed."
The flow starts with a single source table with one row per student and multiple scores for that student. It does a few lookups and then splits the stream (using Multicast) in several layers, ultimately generating 25 destinations (one for each score to be recorded), all going to the same table (like a fact table). This all is running under a transaction at the package level, which is distributed to a separate machine.
Apparently, I cannot have all of these streams inserting data into the same table at one time. I don't understand why not. In an OLTP system, many transactions are inserting records into the same table at once. Why can't I do that within the same transaction?
I suppose I can use a UnionAll to join them back together before writing to a single destination, but that seems like an unnecessary waste and clutters the flow. Can anyone offer a different solution or a reason why this fails in the first place?
Thanks in advance.
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