Truncation in derived column

Hi guys, I have got a table with a column (wrongfile nvarchar (300)) and a package with a Derived Column in this way:
I I had to ignore the truncation because it always retrieved "truncation occurred..." but now if I see the table the column wrongfile is empty and I am wondering why by the way that the column in the csv file it less than 100 characters..

Change your expression to cast the variable to Unicode:
(DT_WSTR, 300) @[User::NBFile]
It appears that if you create a column using derived column it gets the length from the variable. So if it is empty when you create the component, SQL Server will create a 0 length output.
Russel Loski, MCT, MCSE Data Platform/Business Intelligence. Twitter: @sqlmovers; blog: www.sqlmovers.com

Similar Messages

"Derived Column" failed because truncation occurred !!!!

HI Friends,
I have got this Error so My package execution keep Failing so Please find my error Below.
Error Message :
Executed as user: BSSLOCAL\DB-CLUS-SQL-Server. Microsoft (R) SQL Server Execute Package Utility Version 11.0.2100.60 for 32-bit Copyright (C) Microsoft Corporation. All rights reserved. Started: 08:41:00 Error: 2014-02-03
08:41:13.92 Code: 0xC020902A Source: Upload to Sharepoint Derived Column [14] Description:The "Derived Column" failed because truncation occurred, and the truncation row disposition
on "Derived Column.Outputs[Derived Column Output].Columns[SDate]" specifies failure on truncation. A truncation error occurred on the specified object of the specified component. End Error Error: 2014-02-03 08:41:13.95 Code:
0xC0047022 Source: Upload to Sharepoint SSIS.Pipeline Description: SSIS Error Code DTS_E_PROCESSINPUTFAILED. The ProcessInput method on component "Derived Column" (14) failed with error code 0xC020902A while processing
input "Derived Column Input" (15). The identified component returned an error from the ProcessInput method. The error is specific to the component, but the error is fatal and will cause the Data Flow task to stop running. There
may be error messages posted before this with more information about the failure. End Error DTExec: The package execution returned DTSER_FAILURE (1). Started: 08:41:00 Finished: 08:41:17 Elapsed: 17.5 seconds. The
package execution failed. The step failed.
Please give me how Can I rectify This Error Thanks For Advance.

Hi Cherukuri19,
If I understand correctly, you checked the data type of the input column from the Advanced Editor for the Derived Column component, right? Based on the error message, it seems that the data length of the target column outputted by the component above the
Derived Column (may be the Source Component) is more than 10 characters. However, you just modify the Input Column data type and length from the Derived Column component, hence, the data truncation error occurs. In this condition, you can avoid this issue
by using the following steps:
Keep the original nature of the SDate Input Column, e.g. don’t set the data type of this column to [DT_STR] or set its length.
Use the following expression instead for the Derived Column:
(DT_STR,10,1252)((DT_DBDATE)SDate)
Regards,
Mike Yin
TechNet Community Support

Data Conversion and Derived Column issues

I have a strange issue occurring with one of my SSIS packages.
What needs to happen:
I have to read data from a table that stores a field in NCHAR(40)
Send it through a Data Cleansing SSIS Component that forcefully outputs the data at a cleansed state as DT_STR(50)
Update the same source table with cleansed data - Using an UPSERT third party tool
Of course, I can't update the tables that stores data in NCHAR(40) with data from DT_STR(50), so I'm trying to use the Data Conversion Component, the Derived Column Component or a combination of, to set the data to DT_WSTR as well as to set the correct length,
from 50 to 40.
The Data Conversion Component fails when I try to set the incoming data (DT_STR(50)) to DT_WSTR(40):
[Data Conversion [186]] Error: Data conversion failed while converting column "MD_Address1" (97) to column "_MD_Address1" (190). The conversion returned status value 2 and status text
"The value could not be converted because of a potential loss of data.".
Now I tried the same thing with the Derived Column Component, converting the data from the DQS component from (DT_STR(50)) to DT_WSTR(40) and there's the error message:
[Derived Column [196]] Error: The "Derived Column" failed because truncation occurred, and the truncation row disposition on "Derived Column.Inputs[Derived Column Input].Columns[_MD_Address1]"
specifies failure on truncation. A truncation error occurred on the specified object of the specified component.
I also tried a combination of Data Conversion (From DT_STR(50) to DT_WSTR(50)) and a Derived Column just casting to the correct size, but that didn't work either.
Every time I try to change the size, one of the components fail.
It appears that my issue has nothing to do with the data types, but the actual data length.
Why can't SSIS CAST my input from 50 to 40?
What do I need to do to cast/convert data from DT_STR(50) to DT_WSTR(40)?

Hi IgorSantos_FL,
It is the expected behavior when we try to convert DT_STR(50) (means maximum 50 characters in the value) to DT_WSTR(40) (means maximum 40 characters in the value). However, the truncation issue should not occur if you convert DT_STR(50) to
DT_WSTR(50). Could you post the error message that you received when converting DT_STR(50) to DT_WSTR(50)? It may be a different issue.
Regards,
Mike Yin
TechNet Community Support

Convert SQL Query to Derived Column Expression

I'm in the process of reworking some SSIS packages I inherited. A lot of these use Execute SQL Statement components to update certain fields in the tables once they've been loaded. I'd like to replace these individual UPDATE statements with Derived Column
components.
I've got 95% of them converted, except for a couple, one of which has me a bit perplexed and was hoping someone could provide some insight.
Essentially, there is a column called POSTPERIOD which is a date in string format YYYYMM (i.e., 201503). The SQL update parses out the month piece and converts it to the month name and populates a column called POSTPERIOD_MONTH.
Here is the SQL:
select DateName(month , DateAdd(month, CONVERT(INT, SUBSTRING(POST_PERIOD,5,2)), 0 ) - 1 )
I'd like to accomplish this using a Derived Column, but not sure how to go about doing this...
If someone could point me in the right direction, it would be greatly appreciated!
Thanks!
A. M. Robinson

Visakh:
Thank you for the reply! I've tried your solution but am getting the following error(s):
Warning 17 Validation warning. Populate STAGING_DIM_AP_DETAIL - RADIO: {ACAA99C4-272C-4641-BF44-B4D4409D1EFB}: The expression "(DT_STR,8,1252)((DT_I4)[SUBSTRING](#85,5,2) == 1 ? (DT_STR,8,1252)"January" : ((DT_I4)[SUBSTRING](#85,5,2)
== 2 ? (DT_STR,8,1252)"February" : ((DT_I4)[SUBSTRING](#85,5,2) == 3 ? (DT_STR,8,1252)"March" : ((DT_I4)[SUBSTRING](#85,5,2) == 4 ? (DT_STR,8,1252)"April" : ((DT_I4)[SUBSTRING](#85,5,2) == 5 ? (DT_STR,8,1252)"May" :
((DT_I4)[SUBSTRING](#85,5,2) == 6 ? (DT_STR,8,1252)"June" : ((DT_I4)[SUBSTRING](#85,5,2) == 7 ? (DT_STR,8,1252)"July" : ((DT_I4)[SUBSTRING](#85,5,2) == 8 ? (DT_STR,8,1252)"August" : ((DT_I4)[SUBSTRING](#85,5,2) == 9 ? (DT_STR,8,1252)"September"
: ((DT_I4)[SUBSTRING](#85,5,2) == 10 ? (DT_STR,8,1252)"October" : ((DT_I4)[SUBSTRING](#85,5,2) == 11 ? (DT_STR,8,1252)"November" : (DT_STR,8,1252)"December")))))))))))" will always result in a truncation of data. The expression
contains a static truncation (the truncation of a fixed value). Dimension Finance - Load STAGING_DIM_AP_DETAIL_DERIVED_COLUMNS.dtsx 0 0
This is the derived column expression I'm using:
(DT_STR,8,1252) ((DT_I4)SUBSTRING([POST_PERIOD],5,2) == 1? (DT_STR,8,1252) "January" : ((DT_I4)SUBSTRING([POST_PERIOD],5,2) == 2 ? (DT_STR,8,1252) "February" : ((DT_I4)SUBSTRING([POST_PERIOD],5,2) == 3 ? (DT_STR,8,1252) "March" :((DT_I4)SUBSTRING([POST_PERIOD],5,2) == 4 ? (DT_STR,8,1252) "April":((DT_I4)SUBSTRING([POST_PERIOD],5,2) == 5 ? (DT_STR,8,1252) "May" : ((DT_I4)SUBSTRING([POST_PERIOD],5,2) == 6 ? (DT_STR,8,1252) "June" : ((DT_I4)SUBSTRING([POST_PERIOD],5,2) == 7 ? (DT_STR,8,1252) "July" : ((DT_I4)SUBSTRING([POST_PERIOD],5,2) == 8 ? (DT_STR,8,1252) "August":((DT_I4)SUBSTRING([POST_PERIOD],5,2) == 9 ? (DT_STR,8,1252) "September":((DT_I4)SUBSTRING([POST_PERIOD],5,2) == 10? (DT_STR,8,1252) "October": ((DT_I4)SUBSTRING([POST_PERIOD],5,2) == 11 ? (DT_STR,8,1252) "November" : (DT_STR,8,1252)"December")))))))))))
Some info that might be of some help in the matter...the POST_PERIOD field is a VARCHAR(8), the POST_PERIOD_MONTH field is also a VARCHAR(8).
There is a computed column Any help would be appreciated once again!!!
A. M. Robinson

Derived column transformation from varchar(8) YYYYMMDD to DATETIME column

It seems I have tried everything, but all I need to do is change a column from varchar(8) to DATETIME. Some lines are blank, zero length strings, and some have dates such as 20140829. All the rows go to an exception table or it just bombs altogether. The
only thing I can get to run is NULL(DT_DATE), but obviously, that won't work in the end.
I tried LTRIM(RTRIM(MyDateColumn) == "" ? (DT_DATE)"1900-01-01" : (DT_DATE)(SUBSTRING(MyDateColumn,1,4) + "-" + SUBSTRING(MyDateColumn,5,2) + "-" + SUBSTRING(MyDateColumn,7,2))
I got truncation errors on that.
Sometimes I got an error: An error occurred while attempting to perform a type cast.
I tried DT_DATE, DT_DBDATE and DB_DBTIMESTAMP
I even tried putting GETDATE() in there or a literal date such as "2014-08-29" like (DT_DBDATE)"2014-08-29"
This wouldn't even compile: MyDatCeolumn == "" ? NULL(DT_DBDATE) : (DT_STR,10,1252)((DT_DBDATE)MyDateColumn)
I tried many variations on these. I either got truncation errors or the transformation would turn red and stop, or the expression wouldn't work (turns red when you leave the row).
Review:
Source MyDateColumn VARCHAR(8) NULL; Target MyDateColumn DATETIME; Source values in format of "" (blank) or "20140829". The blanks should end up null, or maybe a literal date like Jan 1, 1900, and the actual dates should be transformed
to DATETIME.
Should not be that hard. Thanks in advance for help.

Hi duanewilson,
Please create a Derived Column transformation and a new column, then use the following expression for the expression field:
(DT_DATE)(SUBSTRING([MyDateColumn],1,4) + "-" + SUBSTRING([MyDateColumn],5,2) + "-" + SUBSTRING([MyDateColumn],7,2))
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TechNet Community Support

How to cast a column of a derived column in a view to NULL

I have a derived column in my view and this column by default is picked up as not null.
I want to cast it to null how can i do it ?
Actual column
column1 varchar(3) not null
Expected column
column1 varchar(3) null
Mudassar

Shridar I havent defined it but the derived column has been picked up as not null which is strange
CREATE VIEW test
AS
SELECT
CASE
WHEN COMPANY_SIZE IS NULL then 'a'
ELSE 'b'
END AS
column1 ----- added derived column identifier
,[Company_Size] AS [CompanySize]
FROM xyz
Mudassar

Can't change the connection string of SSIS package with derived columns?

We upgraded SQL server 2008 to 2012, copied and converted all SSIS packages from Visual Studio 2008 to 2010. When I opened a package in VS 2010 and tried to change the connection string, in the local connection managers, if the data source is another
SSIS package B(.dtsx file) with derived columns, I can't change the connection string of package B. When I opened the file connection manager editor for package B and tried to locate a dtsx file in another location, saved the change, reopened the project.
Package B still pointed to previous file. Other packages without derived columns work fine. Any thoughts?

We are using the package deployment model and refer to other packages in the same project. If
we changed the path of package B (with derived columns) to "D:\Visual Studio 2010\xxxx", and refer it in package A, in the A's connection manager, the connection string of package B is still its previous location "D:\Visual
Studio 2008\xxxx". When we ran the package A in the SQL server agent, the data source is still
"D:\Visual
Studio 2008\xxxx", so how can I change it to "D:\Visual
Studio 2010\xxxx"? Why has the package C (without derived columns) no such problem? thanks.

Checkbox derived column in report

I added an HTML checkbox that has the same name for every row and a value of the pk for that row to a report. I also added a submit button.
The submit button branches back to the same page.
If I don't check ANY checkbox buttons the submit button just takes me back to the same report. If I even click one checkbox, I get a 404 "Page cannot be found" with the url saying: pls/htmldb/wwv_flow.accept
why is this procedure doing this? How can I add a derived column containing a checkbox to a report for selection of report rows for further processing or adding of these rows to a "shopping cart/basket".

Enough with this ..... link
http://www.oracle.com/technology/products/database/htmldb/howtos/checkbox.html
How many times do we have to see it in the forum....Enough.....
Its so frustrating giving the same link time and time again...And the funny
part is that most people's questions has nothing to do with that. But
still some geniuses give the same link....I just feel so sorry for people
who are struggling to get a answer and some idiots give the same link

Create a derived column based on a value within the file name

I am importing a CSV file which is easy enough, but I have an issue where I need to manufacture a couple of column values based on the filename of the input. So this same process will import different types of records to the same table in sql server.
I need to pull out the record code from the file name.
For instance, say I can use the same package to input two different CSV files. One is named Input_M02_Data.csv and one named Input_B15_Data.csv. I need to create a derrived column and store the record code there (i.e.: M02 or B15) based
on which file it came out of.
fyi-
I also need to create a second column for Dept based off of the file name as well. M02 is dept 45 and B15 is dept 99 which I also need to insert into this table when I import the data from the .csv file.
Any help is greatly appreciated!

Hi Jason,
According to your description, you want to add two derived columns based on the file name to also insert into table. One stores the value between two “_” within file name, another stores the department based on that column.
If in this scenario, we can add a variable FileName that stores the filename, then add the two variables as derived columns like below in the Derived Column Transformation:
Name:
SUBSTRING(@[User::FileName],FINDSTRING(@[User::FileName],"_",1)+1,FINDSTRING(@[User::FileName],"_",2)-(FINDSTRING(@[User::FileName],"_",1)+1))
Dept:
@[User::Name] =="M02"?"dept 45":@[User::Name] =="B15"?"dept 99":"dept 00"
The following screenshot is for your reference:
If there are any other questions, please feel free to ask.
Thanks,
Katherine Xiong
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here.
Katherine Xiong
TechNet Community Support

SSIS: Using CASE Statement Within A Derived Column Transformation Expression

The following is my Data Flow:
Ole DB Source > Copy Column > Derived Column >Ole DB Command
My OLE DB Source has the following SQL command task:
SELECT *
FROM Repair R
LEFT OUTER JOIN Vehicle V
ON R.SN = V.SN
AND R.Reg = V.Reg
LEFT OUTER JOIN Product P
ON R.PID = P.PID
This yields a column of concern for me named PartNumber, which are represented by the following 2 formats:
The following are my Copied Columns:
Input Column = PartNumber
Output Alias = Copy of PartNumber
The following are my Derived Column expressions:
Derived Column Name Derived Column Expression
Name Replace 'PartNumber' LEFT(PartNumber,FINDSTRING(PartNumber,"-",1) - 1)
Copy of Name Replace 'Copy of PartNumber' RIGHT([Copy of PartNumber],LEN([Copy of PartNumber]) - FINDSTRING([Copy of PartNumber],"-",1))
So My PartNumber Column is Replaced with ######### of type
string and the Copy of PartNumber column is replaced with
#### of type int
As I stated earlier PartNumber also is in the format of %-%-% which raises the following question:
How can I replace PartNumber Column with NULL if in format of
%-%-% and take the PartNumber and put it in new column named
SubPart while keeping all the logic within SSIS objects?
So in essence I want to do something like the following:
PartNumber = CASE
WHEN 'PartNumber' LIKE '%-%-%'
THEN ABC = PartNumber AND PartNumber IS NULL
END
I have tried the case statement in a Derived Column expression and is not working. Would I add the
CASE statement to the SQL command task in my OLE DB Source?
I hope this question is concise for you.

If it must be in SSIS, I would put a derived column stage earlier in the process to do my check for me. Then in the second derived column stage do the check against each output column (part, subpart, copy of part) to decide which way it goes
PS Not sure if it's a 2012 function but SSIS has a function called TOKEN that will allow you to pull your subparts for you rather than the left/right you are doing

Replace "\\\\''" from a derived column

Hi All,
Quick Question : need to replace in a string the value '' (quote quote) by \\'' (antislash antislash quote quote).
This change could be done from a derived column transformation
Obviously REPLACE(field_value,"''","\\\\''") doesn't run...
Thx for your help

Don't understand the following issue :
1/ from a NEW project into a derived colum i enter :
"REPLACE(field1,@[User::varSearch],@[User::varReplacement])"
=> black font : it s running
2/ from an existing project I create the both variable : varSearch, varReplacement
and into a derived colum : "REPLACE(field1,@[User::varSearch],@[User::varReplacement])"
=> red font : it s running
I suppose a format (wstr) or lenght field issue...

Output a derived column to a flatfile destination

I'm a newbie. My source is a sql server table. Then I dropped a derived column icon. And finally a flatfile destination.
When I open the flatfile destination, it does show the new column as 'Derived Column 1' in the Available Input Columns, but it's not shown in the Available Destination Columns.
How do I add it to the Available Destination Columns?

I had to open the flat file connection manager window and manually add a new column.

Adding Rank for a Column in SSIS Derived Column

H
I want to add rank to a column in ssis in a derived column actually.
Can u please tell how to add it and the syntax for adding it in a derived column.

Thanks,
Can you please give the script for the same.
I am unable to write the script for my logic to implement in SSIS.
I will be very thankful if some one could help me with it.
Thanks in Advance.
Sam thats too generic there would be several ways to solve one problem ...
can u tell us what is ur source [i mean table view THE DATA which records tuples you suspect is having duplicates ]
on what basis u decide duplicate ? and what row qualifies to go into destination ... for eg say ur source is
select id,name, date from source_table
duplicacy could mean id and name being repeated multiple times and may be business rule is like pick up rec with latest date vale if thats the case go for source as :
select id, name,max(date) from sourcetable
group by id,name
if all the columns are repeating in your source table may be use DISTINCT ...
would be great if u give ur destination, source and business requirement ..
if you have got primary key violations and any record qualifies then may be simply at destination component set Ignore failure property and ur job is done ...
may be removing duplicate at source itself ... might solve ur problem
check out more on duplicates : http://blog.sqlauthority.com/2009/06/23/sql-server-2005-2008-delete-duplicate-rows/
i hope u got the idea ...
Hope that helps ... Kunal

Reference the value of a Derived Column

Hi Folks.
Starting a new tread on this because the title fo the original thread which I was replying to does not address the specific issue i have now.
If I add a [derived column] to the report definition and give put the following in the HTML Expression..
<input type="file">
Then I get the file browser for each row.
Now how can I reference the value of the derived column on a row by row basis. What is the syntax for referring to the column value?
Any assistance greatly appreciated.
Many thanks
Simon

It's a case of "Close, but no cigar" I'm afraid.
Whilst this solution will capture the 'string' selected in the column. APEX still will not put the file into the APEX_APPLICATION_FILES table.
This would appear to be the final missing link in the chain.
Should you, or anyone, know how to do this, please post a reply. I did find seom info in this thread...
insert multiple files from a single form
but I'm finding it hard to follow, especially as the original tutorial link no longer works.
This page, by Denes Kubicek seems to do the trick for him...
http://htmldb.oracle.com/pls/otn/f?p=31517:161:474655789644959::NO
Have asked him if he will post the backend code.
Simon

How can I implement an user function in a derived column of a report ?

Hello,
I've a report and added a derived column.
In this column should be displayed the result of a function.
GETANZGJMONATE ( to_date(#START_AFA#,'DD.MM.YYYY'), #ND#, :P302_GJ );
How can I implement this?
Thanks in advance
Regards Ulrike

Ulrike - I would do this in the SQL statement (there may be other ways).
Presumably START_AFA and ND are table columns?
Presumably you've also created the GETANZGJMONATE function?
So, something like this should work (this also assumes that START_AFA is of a DATE type - you'll need the TO_DATE call if not):
SELECT COL1
, COL2
, START_AFA
, ND
, GETANZGJMONATE (START_AFA, ND, :P302_GJ)
from TABLE
where ...
Can't remember if you have to grant any particular execute permissions on the function ('grant execute on GETANZGJMONATE to public', for example) when you call it from SQL on a page, but you could try that if the function call fails.
Depending on what's in :P302_GJ and what the function parameter data type is, you might need to use the '&P302_GJ.' syntax or TO_NUMBER etc.
Hope this helps.
Regards,
John.

Truncation in derived column

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