I have a DB OLE Source going to an excel destination. I receive the following error
Error at Data Flow [Excel Destination [88]]: Column "X" cannot convert between unicode and non-unicode string data types.
I have added in a data conversion to change string columns to Unicode. this has not resolved the problem. any guidance would be appreciated
Go to your excel destination component --> mapping --> hover your mouse over column in question, you'll see that it is Unicode Str. Something like this :
Hence, you need a data conversion component to add an alias of source column to DT_WSTR Unicode String AND map it in excel destination component.
I replicated your problem and thus providing you solution.
IF this doesn't work, then delete these components and re-add them, as this is will mostly resolve your issue.
Try using a derived column instead of data conversion transformation, use the following expression
If destination is unicode
(DT_WSTR,50)[X]
Else
(DR_STR,50,1252)[X]
Related
I've tried finding a solution for my issue but alas the problem continues. I've got an Excel Data Destination which I am trying to map in to SSIS [Please note I am saying the issue with the way SSIS identifies the Data Type of the Excel input. The scenario is OLE DB Source > Data Conversion > Excel Destination, please don't tell me to do a Data Conversion or use the Input and Output Properties method because it doesn't work, it just converts back to what SSIS "thinks" it's meant to be the instant I click out of the operations window]. I'm trying to create a new Excel Document through SSIS by mapping out the template to my data source from OLE DB Source.
Now when I do it with example data in the Excel Destination, it works fine because SSIS registers that the value in the workbook is a NTEXT [which is what I want]. However, the instant I apply the expression to use a blank template [with just headers no example data] it converts the Data Type in my Template to NVARCHAR(255) which is wrong and my package fails when I execute it, due to incompatible Data Type.
I've tried converting the Data Type within the Excel workbook to a TEXT format but it doesn't matter because when you pull it in to the Data Flow SSIS overwrites it and identifies that Column as a NVARCHAR(255). Even when I give up and comply and change the Input Data to NVARCHAR(255) because I'm just so annoyed, it still doesn't work because it fails my package and gives me an error message that it truncates my column field [-_-"]. I can't win.
I'll probably try and use a SQL Command to force it to identify the column as a NTEXT in the Excel Destination Editor or just rewrite some form of Forced SSIS to identify the Column as NTEXT but is there another way I am not aware of? I feel this is quite a known issue and there should be a plausible solution. Any assistance will be appreciated. Thank you.
I'm trying to insert a large CSV file (several gigs) into SQL Server, but once I go through the Import Wizard and finally try to import the file I get the following error report:
Executing (Error)
Messages
Error 0xc02020a1: Data Flow Task 1: Data conversion failed. The data
conversion for column ""Title"" returned status value 4 and status
text "Text was truncated or one or more characters had no match in the
target code page.".
(SQL Server Import and Export Wizard)
Error 0xc020902a: Data Flow Task 1: The "Source -
Train_csv.Outputs[Flat File Source Output].Columns["Title"]" failed
because truncation occurred, and the truncation row disposition on
"Source - Train_csv.Outputs[Flat File Source Output].Columns["Title"]"
specifies failure on truncation. A truncation error occurred on the
specified object of the specified component.
(SQL Server Import and Export Wizard)
Error 0xc0202092: Data Flow Task 1: An error occurred while processing
file "C:\Train.csv" on data row 2.
(SQL Server Import and Export Wizard)
Error 0xc0047038: Data Flow Task 1: SSIS Error Code
DTS_E_PRIMEOUTPUTFAILED. The PrimeOutput method on Source - Train_csv
returned error code 0xC0202092. 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. There may be error messages posted
before this with more information about the failure.
(SQL Server Import and Export Wizard)
I created the table to insert the file into first, and I set each column to hold varchar(MAX), so I don't understand how I can still have this truncation issue. What am I doing wrong?
In SQL Server Import and Export Wizard you can adjust the source data types in the Advanced tab (these become the data types of the output if creating a new table, but otherwise are just used for handling the source data).
The data types are annoyingly different than those in MS SQL, instead of VARCHAR(255) it's DT_STR and the output column width can be set to 255. For VARCHAR(MAX) it's DT_TEXT.
So, on the Data Source selection, in the Advanced tab, change the data type of any offending columns from DT_STR to DT_TEXT (You can select multiple columns and change them all at once).
This answer may not apply universally, but it fixed the occurrence of this error I was encountering when importing a small text file. The flat file provider was importing based on fixed 50-character text columns in the source, which was incorrect. No amount of remapping the destination columns affected the issue.
To solve the issue, in the "Choose a Data Source" for the flat-file provider, after selecting the file, a "Suggest Types.." button appears beneath the input column list. After hitting this button, even if no changes were made to the enusing dialog, the Flat File provider then re-queried the source .csv file and then correctly determined the lengths of the fields in the source file.
Once this was done, the import proceeded with no further issues.
I think its a bug, please apply the workaround and then try again: http://support.microsoft.com/kb/281517.
Also, go into Advanced tab, and confirm if Target columns length is Varchar(max).
The Advanced Editor did not resolve my issue, instead I was forced to edit dtsx-file through notepad (or your favorite text/xml editor) and manually replace values in attributes to
length="0" dataType="nText" (I'm using unicode)
Always make a backup of the dtsx-file before you edit in text/xml mode.
Running SQL Server 2008 R2
Goto Advanced tab----> data type of column---> Here change data type from DT_STR to DT_TEXT and column width 255. Now you can check it will work perfectly.
Issue:
The Jet OLE DB provider reads a registry key to determine how many rows are to be read to guess the type of the source column.
By default, the value for this key is 8. Hence, the provider scans the first 8 rows of the source data to determine the data types for the columns. If any field looks like text and the length of data is more than 255 characters, the column is typed as a memo field. So, if there is no data with a length greater than 255 characters in the first 8 rows of the source, Jet cannot accurately determine the nature of the data type.
As the first 8 row length of data in the exported sheet is less than 255 its considering the source length as VARCHAR(255) and unable to read data from the column having more length.
Fix:
The solution is just to sort the comment column in descending order.
In 2012 onwards we can update the values in Advance tab in the Import wizard.
I have generated and excel from SSIS package successfully.
But every column is having extra ' (quote) mark why is it so?
My source sql table is like below
Name price address
ashu 123 pune
jkl 34 UK
In my sql table i took all column as varchar(50) datatype.
In Excel Manager when it is going to create table
Excel Destination took all column as same varchar(50) datatype.
And in Data Flow I have used Data Conversion transformation to prevent unicode conversion error.
Please advice where i need to change to get the clear columns in excel file.
You could create a template Excel file in which you have specified all the column types (change to Text from General) and headers you will need. Store it in a /Template directory and have copy it over to where you will need it from within the SSIS package.
In your SSIS package:
Use Script Component to copy Excel Template file into directory of choice.
Programatically change its name and store the whole filepath in a variable that will be used in your corresponding Data Flow Task.
Use Expression Builder for your Excel Connection Manager. Set the ExcelFilePath to be retrieved from your variable.
the single quote or apostrophe is a way of entering any data (in Excel) and ensure it is treated as text so numbers with leading zeros or fractions are not interpreted by Excel as numeric or dates.
a NJ zip code for instance 07456 would be interpreted as 7456 but by entering it as '07456 it keeps its leading zero (please note that numbers in your example are left aligned, like text is)
I guess SSIS is adding the quotes because your data is of VARCHAR type
First, define the field types for your excel destination in SSIS, any non-text fields will format properly without the '. Then, add a derived column transformation between your source and destination, and use a replace statement for any text columns.
Should be:
(REPLACE(Column1, "'","")
This caused me major problems! So I completed the following:
You can change the excel version to 'Microsoft Excel 4.0' within the excel connection manager in your SSIS package.
Then within excel follow Options > Trust Center > Trust Center Settings > File Block Settings > Untick the 'Open' checkbox for 'Excel 4 workbooks' and 'sheets'.
It is a particular problem when using the Excel destination, at least with older versions of SSIS anyway. To answer the why question, there is this in the Microsoft documentation:
The following behaviors of the Jet provider that is included with the Excel driver can lead to unexpected results when saving data to an Excel destination.
Saving text data. When the Excel driver saves text data values to an Excel destination, the driver precedes the text in each cell with the single quote character (') to ensure that the saved values will be interpreted as text values. If you have or develop other applications that read or process the saved data, you may need to include special handling for the single quote character that precedes each text value.
Taken from https://learn.microsoft.com/en-us/previous-versions/sql/sql-server-2008-r2/ms137643(v=sql.105)
i'm working on ssis package and i'm taking values from .xml file to ado .net destination
but when i enter values iinto table getting following error :
potential data loss may occur due to inserting data from input column "Copy of swaps_Id" with data type "DT_I8" to external column "swaps_id" with data type "DT_I4". If this is intended, an alternative way to do conversion is using a Data Conversion component before ADO NET destination component
I have used Data conversion transformation editor then also getting above error
what should be corrected?
This warning means that data in Copy of swaps_Id is 64bit integer and you trying to insert it into 32bit integer column in destination table. What should you do depends on your data.
If you are sure that data in your column is in 32bit signed integer range (-2^31 (-2,147,483,648) to 2^31-1 (2,147,483,647)) you can leave it as is (data truncation will never occur, bur warning will stay) or do data conversion or change Copy of swaps_Id column data type
If not, you should change column data type in your destination data table to 64bit integer (bigint in Sql Server)
This simply means that your source data type is Larger than what your destination can handle. On the Data Conversion Transformation, you may want to convert the column to DT_I8 datatype in order for that warning to disappear.
I get an input CSV file that I have to upload to my oracle database.
Here is some sample data
ContractId, Date, HourEnding, ReconciledAmount
13860,"01-mar-2010",1,-.003
13860,"01-mar-2010",2,.923
13860,"01-mar-2010",3,2.542
I have to convert the incoming column to DB_TIMESTAMP (to match the structure in the destination table).
But when I use Data Conversion to convert, I get an error
Data conversion failed while converting column "Date" (126) to column "Date" (496). The conversion returned status value 2 and status text "The value could not be converted because of a potential loss of data.
What should I do to be able to properly convert this data?
What you could do in this situation is change the Text Qualifer in your Flat File connection to be a single double quote (").
This will cause SSIS to interperet
13860,"01-mar-2010",1,-.003
as
13860,01-mar-2010,1,-.003
This also has the added bonus of being able to catch any embedded commas in your data if they are also qualfied with quotes.
The problem is with the quotation marks ["] in the file.
You should remove them from the file or add a Derived Column before the Data Conversion component to remove the " with the expression
REPLACE([TextDateColumn],"\"","")