SQL 2012 :: (SSIS) - Cannot Convert Between Unicode And Non-unicode Data Types
Sep 9, 2015
I have an SSIS package that pulls data from a MYSQL DB (Using RSSBus for Salesforce in SSIS to accomplish this). Most of the columns are loading properly, but I have many columns that I need to convert.
I have been using the Data Conversion dataflow task in SSIS to convert the rows.
I have 2 data conversions that work on most of the columns, but the DESCRIPTION column continues to return an error saying "Cannot convert between unicode and non-unicode types", regardless of what I choose on the Data Conversion task. So, basically I want to dump this column data into a SQL table with NVARCHAR datatypes. Here is what I am doing in my SSIS package...
1) Grab subset of data from SOURCE
2) Converts to TEXTSTREAM. (Data Conversion)
3) Converts to STRING. (Data Conversion)
4) Load Destination table. (OLE DB Destination)
I have also tried to simply convert the values to STRING, but that doesn't work either.
So, I have 2 Data Conversions working here that process most of the data correctly. What I can do to load the DESCRIPTION column?
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Aug 7, 2012
I am following the SSIS overview video- URL...I have a flat file that i want to import the contents onto a SQL database.I created a Dataflow task, source file and oledb destination.I am getting the folliwung error -"column "A" cannot convert between unicode and non-unicode string data types".in the origin file the data type is coming as string[DT_STR] and in the destination object it is coming as "Unicode string [DT_WSTR]"I used a data conversion object in between, dosent works very well
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Jul 28, 2005
Good afternoon
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Apr 6, 2006
I have an Excel Source component hooked to an OLE DB Destination component in my SSIS 2005 Data Flow Task. After I mapped the excel columns to the OLE DB table columns i get these errors below. I noticed that for the first error, the Excel Field format (when you mouse over the column name in the mappings section in OLE DB component) is of type [DTWSTR] and the corresponding SQL field from my SQL table that it's mapping to is of type [DT_STR] when mousing over that field in the mappings in the properties of my OLE DB component. All table fields in SQL Server for the table I'm inserting into are of type varchar.
print screens here:
http://www.webfound.net/excel_ssis.jpg
http://www.webfound.net/excel_to_oledb_mappings.jpg
Package Validation Error
------------------------------
ADDITIONAL INFORMATION:
Error at Data Flow Task [OLE DB Destination [27]]: Columns "Commission Agency" and "CommissionAgency" cannot convert between unicode and non-unicode string data types.
Error at Data Flow Task [OLE DB Destination [27]]: Column "Product" cannot convert between unicode and non-unicode string data types.
Error at Data Flow Task [OLE DB Destination [27]]: Columns "Officer Code" and "OfficerCode" cannot convert between unicode and non-unicode string data types.
Error at Data Flow Task [OLE DB Destination [27]]: Columns "Agency Name" and "AgencyName" cannot convert between unicode and non-unicode string data types.
Error at Data Flow Task [OLE DB Destination [27]]: Columns "Agency Id" and "AgencyID" cannot convert between unicode and non-unicode string data types.
Error at Data Flow Task [OLE DB Destination [27]]: Columns "Tran Code" and "TranCode" cannot convert between unicode and non-unicode string data types.
Error at Data Flow Task [OLE DB Destination [27]]: Columns "User Id" and "UserID" cannot convert between unicode and non-unicode string data types.
Error at Data Flow Task [OLE DB Destination [27]]: Columns "Acct Number" and "AccountNumber" cannot convert between unicode and non-unicode string data types.
Error at Data Flow Task [DTS.Pipeline]: "component "OLE DB Destination" (27)" failed validation and returned validation status "VS_ISBROKEN".
Error at Data Flow Task [DTS.Pipeline]: One or more component failed validation.
Error at Data Flow Task: There were errors during task validation.
(Microsoft.DataTransformationServices.VsIntegration)
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Mar 7, 2008
Hi,
I have spent countless number of hours trying to solve the issue, but to no vail. My problem is SSIS throws "cannot convert between unicode and non-unicode string data types" when i am try to transform data from DB2 to SQL Server 2005. And please note, i tried all possibilities like changing the destination field which is in SQL Server 2005 to nvarchar and also text. But so far no help. And i also looked at previous posts which did not help me either.
Thank You in advance.
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May 14, 2008
Hi guys and gals,
I've had some great headaches with SSIS this morning, which I have managed to get a workarounds for, but I'm not happy with them so I've come to ask for advice.
Basically, I am exporting data from an SQL Server database into an Excel spreadsheet and hitting issues with unicode and non-unicode data types.
For example, I have a column that is char(6) and have added a data conversion step to the data flow, which converts it to type DT_WSTR and then everything works!
However, this seems like a completely un-neccessary step as I should be able to do the conversion in T-SQL - but no matter what I try I keep getting the same problem.
SELECT Cast(employee_number As nvarchar(255)) As [employee_number]
FROM employee
WHERE forename = 'george'
ErrorValidation error. details: 1 [1123]: Column "employee_number" cannot convert between unicode and non-unicode string data types.
I know I have a solution (read: workaround) but I really don't want to do this everytime!
Any suggestions for what else to try?
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Jan 15, 2007
HI.
I'm having this problem.
I use Visual Studio's, integration project to load XML file into SQL Server. In the XML file, i have defined collumns as string. When i try to load XML file with parts defined in scheme as string, i get an error "cannot convert between unicode and non-unicode string data type.
Destinated collumns in SQL are defined as varchar and char.
Thanks for help
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May 7, 2009
For packages that I have created to read Oracle 10g tables, that work fine with debugging in 32-bit mode, I get an error message on all string fields when I try to run in 64-bit mode. An example error message is:[OLE DB Source [1]] Error: Column "ACCT_UNIT" cannot convert between unicode and non-unicode string data types.Another interesting warning included is:[OLE DB Source [1]] Warning: The external columns for component "OLE DB Source" (1) are out of synchronization with the data source columns. The external column "ACCT_UNIT" needs to be updated.I cannot even try to convert this data with a Data Conversion item because the (red) error is on the OLE DB Source item and stops there. It doesn't matter what the destination is or even if there is a destination in the package yet.I'm using Oracle Provider for OLE DB, Oracle Client version 10.203 for 32-bit and Oracle Client 10.204 for 64-bit.Oracle is 10g on a UNIX 64-bit server and the data is not unicode.I'm using SQL Server Enterprise 2008 (10.0.1600) on Windows Server 2008 Standard SP1 on a 64-bit server.The packages work fine in 32-bit mode and the data is not unicode data. When I change Run64BitRuntime to True in the Debugging Property Page, I get the error on the OLE DB Source item. I also get the error when I schedule a package to run using the SQL Server Agent.
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May 6, 2015
In my package , I am used CDC Source transformation and received the Net changes then insert into Destination. But whatever Data coming from CDC source data type Varchar value needs to Converting Non Unicode string to Unicode string SSIS. So used Data conversion transformation to achieved this. I need to achieve this without data conversion.
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Nov 8, 2006
I have built a large package and due to database changes (varchar to nvarchar) I need to do a data conversion of all the flat file columns I am bringing in, to a unicode data type. The way I know how to do this is via the data conversion component/task. My question is, I am looking for an easy way to "Do All Columns" and "Map all Columns" without doing every column by hand in both spots.
I need to change all the columns, can I do this in mass? More importantly once I convert all these and connect it to my data source it fails to map converted fields by name. Is there a way when using the data conversion task to still get it to map by name when connecting it to the OLE destination?
I know I can use the wizard to create the base package, but I have already built all the other components, renamed and set the data type and size on all the columns (over 300) and so I don't want to have to re-do all that work. What is the best solution?
In general I would be happy if I could get the post data conversion to map automatically to the source. But because its DataConversion.CustomerID it will not map to CustomerID field on destination. Any suggestions on the best way to do this would save me hours of work...
Thanks.
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Dec 18, 2006
Hi there,Trying to work with SQL2005 with Hebrew characters. If i use the Unicode character data types do i need to change the database collation???. regards
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Jan 4, 2006
I keep getting the error message below when attempting to import a text file (flat file) to an SQL Server Destination using SSIS. This database has recently been migrated from SQL Server 2000 (where I used a DTS Package that worked fine). I plan on doing further manipulation to the file after importing but have so far tried to keep one step at a time. I have tried using a smaller files and different tables but still get a similar response. I believe that the encoding of the text file is ANSI. If it is relevant the database collation is Latin1_General_CI_AS (the same as it was when 2000). Any help anyone can provide will be greatly appreciated!!!
TITLE: Package Validation Error
------------------------------
Package Validation Error
------------------------------
ADDITIONAL INFORMATION:
Error at Data Flow Task [SQL Server Destination [174]]: Columns "Column 0" and "AccountNumber" cannot convert between unicode and non-unicode string data types.
Error at Data Flow Task [SQL Server Destination [174]]: The column "Column 1" can't be inserted because the conversion between types DT_STR and DT_I4 is not supported.
Error at Data Flow Task [SQL Server Destination [174]]: The column "Column 2" can't be inserted because the conversion between types DT_STR and DT_I4 is not supported.
Error at Data Flow Task [SQL Server Destination [174]]: Columns "Column 3" and "Name" cannot convert between unicode and non-unicode string data types.
Error at Data Flow Task [SQL Server Destination [174]]: The column "Column 4" can't be inserted because the conversion between types DT_STR and DT_I4 is not supported.
Error at Data Flow Task [SQL Server Destination [174]]: The column "Column 5" can't be inserted because the conversion between types DT_STR and DT_R8 is not supported.
Error at Data Flow Task [SQL Server Destination [174]]: Columns "Column 6" and "ExpiryDate" cannot convert between unicode and non-unicode string data types.
Error at Data Flow Task [SQL Server Destination [174]]: Columns "Column 7" and "RateType" cannot convert between unicode and non-unicode string data types.
Error at Data Flow Task [SQL Server Destination [174]]: The column "Column 8" can't be inserted because the conversion between types DT_STR and DT_BOOL is not supported.
Error at Data Flow Task [SQL Server Destination [174]]: Columns "Column 9" and "FullName" cannot convert between unicode and non-unicode string data types.
Error at Data Flow Task [SQL Server Destination [174]]: Columns "Column 10" and "Address" cannot convert between unicode and non-unicode string data types.
Error at Data Flow Task [SQL Server Destination [174]]: The column "Column 11" can't be inserted because the conversion between types DT_STR and DT_DBTIMESTAMP is not supported.
Error at Data Flow Task [SQL Server Destination [174]]: The column "Column 12" can't be inserted because the conversion between types DT_STR and DT_I4 is not supported.
Error at Data Flow Task [SQL Server Destination [174]]: The column "Column 13" can't be inserted because the conversion between types DT_STR and DT_DBTIMESTAMP is not supported.
Error at Data Flow Task [SQL Server Destination [174]]: Columns "Column 14" and "Occupancy" cannot convert between unicode and non-unicode string data types.
Error at Data Flow Task [SQL Server Destination [174]]: Columns "Column 15" and "LoanPurpose" cannot convert between unicode and non-unicode string data types.
Error at Data Flow Task [SQL Server Destination [174]]: The column "Column 16" can't be inserted because the conversion between types DT_STR and DT_R8 is not supported.
Error at Data Flow Task [SQL Server Destination [174]]: The column "Column 17" can't be inserted because the conversion between types DT_STR and DT_R8 is not supported.
Error at Data Flow Task [SQL Server Destination [174]]: The column "Column 18" can't be inserted because the conversion between types DT_STR and DT_R8 is not supported.
Error at Data Flow Task [SQL Server Destination [174]]: The column "Column 19" can't be inserted because the conversion between types DT_STR and DT_R8 is not supported.
Error at Data Flow Task [SQL Server Destination [174]]: The column "Column 20" can't be inserted because the conversion between types DT_STR and DT_I4 is not supported.
Error at Data Flow Task [SQL Server Destination [174]]: The column "Column 21" can't be inserted because the conversion between types DT_STR and DT_I4 is not supported.
Error at Data Flow Task [SQL Server Destination [174]]: The column "Column 22" can't be inserted because the conversion between types DT_STR and DT_I4 is not supported.
Error at Data Flow Task [SQL Server Destination [174]]: Columns "Column 23" and "DocumentLocation" cannot convert between unicode and non-unicode string data types.
Error at Data Flow Task [SQL Server Destination [174]]: The column "Column 24" can't be inserted because the conversion between types DT_STR and DT_I4 is not supported.
Error at Data Flow Task [SQL Server Destination [174]]: Columns "Column 25" and "SecurityType" cannot convert between unicode and non-unicode string data types.
Error at Data Flow Task [SQL Server Destination [174]]: The column "Column 26" can't be inserted because the conversion between types DT_STR and DT_R8 is not supported.
Error at Data Flow Task [SQL Server Destination [174]]: The column "Column 27" can't be inserted because the conversion between types DT_STR and DT_DBTIMESTAMP is not supported.
Error at Data Flow Task [SQL Server Destination [174]]: The column "Column 28" can't be inserted because the conversion between types DT_STR and DT_R8 is not supported.
Error at Data Flow Task [SQL Server Destination [174]]: Columns "Column 29" and "MortgageInsurancePolicyNumber" cannot convert between unicode and non-unicode string data types.
Error at Data Flow Task [SQL Server Destination [174]]: Columns "Column 30" and "SecurityAddress" cannot convert between unicode and non-unicode string data types.
Error at Data Flow Task [SQL Server Destination [174]]: The column "Column 31" can't be inserted because the conversion between types DT_STR and DT_I4 is not supported.
Error at Data Flow Task [SQL Server Destination [174]]: The column "Column 32" can't be inserted because the conversion between types DT_STR and DT_R8 is not supported.
Error at Data Flow Task [SQL Server Destination [174]]: The column "Column 33" can't be inserted because the conversion between types DT_STR and DT_R8 is not supported.
Error at Data Flow Task [SQL Server Destination [174]]: The column "Column 34" can't be inserted because the conversion between types DT_STR and DT_R8 is not supported.
Error at Data Flow Task [SQL Server Destination [174]]: The column "Column 35" can't be inserted because the conversion between types DT_STR and DT_R8 is not supported.
Error at Data Flow Task [SQL Server Destination [174]]: The column "Column 36" can't be inserted because the conversion between types DT_STR and DT_R8 is not supported.
Error at Data Flow Task [SQL Server Destination [174]]: The column "Column 37" can't be inserted because the conversion between types DT_STR and DT_DBTIMESTAMP is not supported.
Error at Data Flow Task [SQL Server Destination [174]]: Columns "Column 38" and "SecuritySuburb" cannot convert between unicode and non-unicode string data types.
Error at Data Flow Task [SQL Server Destination [174]]: The column "Column 39" can't be inserted because the conversion between types DT_STR and DT_I4 is not supported.
Error at Data Flow Task [SQL Server Destination [174]]: The column "Column 40" can't be inserted because the conversion between types DT_STR and DT_R8 is not supported.
Error at Data Flow Task [SQL Server Destination [174]]: The column "Column 41" can't be inserted because the conversion between types DT_STR and DT_R8 is not supported.
Error at Data Flow Task [SQL Server Destination [174]]: The column "Column 42" can't be inserted because the conversion between types DT_STR and DT_R8 is not supported.
Error at Data Flow Task [SQL Server Destination [174]]: Columns "Column 43" and "MortgageNumber" cannot convert between unicode and non-unicode string data types.
Error at Data Flow Task [SQL Server Destination [174]]: Columns "Column 44" and "TitleParticulars" cannot convert between unicode and non-unicode string data types.
Error at Data Flow Task [SQL Server Destination [174]]: The column "Column 45" can't be inserted because the conversion between types DT_STR and DT_DBTIMESTAMP is not supported.
Error at Data Flow Task [SQL Server Destination [174]]: The column "Column 46" can't be inserted because the conversion between types DT_STR and DT_DBTIMESTAMP is not supported.
Error at Data Flow Task [SQL Server Destination [174]]: The column "Column 47" can't be inserted because the conversion between types DT_STR and DT_DBTIMESTAMP is not supported.
Error at Data Flow Task [SQL Server Destination [174]]: The column "Column 48" can't be inserted because the conversion between types DT_STR and DT_I4 is not supported.
Error at Data Flow Task [SQL Server Destination [174]]: The column "Column 49" can't be inserted because the conversion between types DT_STR and DT_R8 is not supported.
Error at Data Flow Task [SQL Server Destination [174]]: The column "Column 50" can't be inserted because the conversion between types DT_STR and DT_R8 is not supported.
Error at Data Flow Task [SQL Server Destination [174]]: The column "Column 51" can't be inserted because the conversion between types DT_STR and DT_DBTIMESTAMP is not supported.
Error at Data Flow Task [DTS.Pipeline]: "component "SQL Server Destination" (174)" failed validation and returned validation status "VS_ISBROKEN".
Error at Data Flow Task [DTS.Pipeline]: One or more component failed validation.
Error at Data Flow Task: There were errors during task validation.
(Microsoft.DataTransformationServices.VsIntegration)
------------------------------
BUTTONS:
OK
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Jul 23, 2005
Hi all, we are now planning to upgrade our application from anon-unicode version to a unicode version. The application's backend isa SQL Server 2000 SP3.The concern is, existing business data are stored using collation"Chinese_PRC_CI_AS", i.e. Simplified Chinese. So I thought we need toextract these data out to the new SQL Server which is using Unicode (Iassume it means converting them to nchar, nvarchar type of fields for Idon't enough information from the application side, or is there ageneral unicode collation that will make even char and varchar types tostore data as Unicode?).The problem is what's the best and most efficient way to do this dataconversion?bcp? DTS? or others?thanks a lot
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Aug 8, 2006
I'm connecting to a SQL Server 2005 database using the latest (beta) sql server driver (Microsoft SQL Server 2005 JDBC Driver 1.1 CTP June 2006) from within Java (Rational Application Developer).
The table in SQL Server database has collation Latin1_General_CI_AS and one of the columns is a NVARCHAR with collation Indic_General_90_CI_AS. This should be a Unicode only collation. However when storing for instance the following String:
__ÙÚÜÛùúüû_ÅÆØåæøßÇçÑñ__ЎўЄє?ґ_пр?туф_ЂЉЊЋ
... it is saved with ? for all unicode characters as follows (when looking in the database):
__ÙÚÜÛùúüû_ÅÆØåæøßÇçÑñ__??????_??????_????
The above is not correct, since all unicode characters should still be visible. When inserting the same string directly into the sql server database (without using Java) the result is ok.
Also when trying to retrieve the results again it complains about the following error within Java:
Codepage 0 is not supported by the Java environment.
Hopefully somebody has an answer for this problem. When I alter the collation of the NVARCHAR column to be Latin1_General_CI_AS as well, the data can be stored and retrieved however then of course the unicode specific characters are lost and results into ? So in that case the output is as described above (ie __ÙÚÜÛùúüû_ÅÆØåæøßÇçÑñ__??????_??????_????)
We would like to be able to persist and retrieve unicode characters in a SQL Server database using the correct JDBC Driver. We achieved this result already with an Oracle UTF8 database. But we need to be compliant with a SQL Server database as well. Please help.
Thanks in advance for your help.
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May 20, 2015
Should Unicode types, like nvarchar, be used when creating new databases that are used by new applications?
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Jun 29, 2006
Any one know the process of transfering the database from non-unicode to unicode. Coz I like to transfer the data from english to hebrew.
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Jul 20, 2005
Hi there.We have an application that can run on a non-unicode or a unicode sqlserverdatabase.Currently the application is running in a unicode database, as anon-unicode database is less than half the size, I would prefer tohave a non-unicode database for demo purposes to be on my laptop, etcetcIs it possible to change a unicode sql server 2000 database into anon-unicode database?And if so, how would I go about doing this?Any help would be greatly appreciated.ThanksRodger
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May 2, 2008
We are in the process of converting an existing database to Unicode. Has anyone encountered any problems in doing this?
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Sep 5, 2006
Hi Everybody,
I have a column Fecha_Apertura int(4) that content data as 1157472771, and I need convert this to datetime.
Someone know of any script?
Thanks by your help
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Dec 8, 2007
Hi,
I am getting an issue when i try to run a package which was validated against an oracle database on windows with UTF8. When I try to run the same package(no changes, just changing the conenction parameters to point to an oracle database on UNIX with UTF16), the package fails with error saying cannot convert unicode to string for string columns.
The same run through fine if I refresh the metadata against the UNIX database, but then it doesnt run against the Windows database.
Can anyone please suggest how to overcome this scenario. My issue is, I need to run my package against various database(by just pointing the database connection details) without changing anything in the package.
Please suggest.
Thanks,
Manish
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Aug 6, 2007
Hi,
I want to convert literal string to unicode before insert into the database. and after insertion i want to retrive this value from data base and convert back to literal string.
pls tell me how to incode and decode literal string to unicode and from unicode to literal string.
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Dec 9, 2007
Is there any way to convert Unicode (NVarchar) to Ascii (Varchar)?
If I just use cast , the result will become ???.
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May 15, 2007
SQL Native Client 2005.90.3042.00 ODBC driver does not return SQL_CVT_DOUBLE as part of the mask from SQLGetInfo for SQL_CONVERT_WCHAR, SQL_CONVERT_WVARCHAR even though driver actually supports converting nchar and nvarchar to SQL_DOUBLE. For example,
select
{ fn convert(N'1.23', SQL_DOUBLE) }
works, but
SQLUSMALLINT nInfoType = SQL_CONVERT_WCHAR;
SQLUINTEGER nInfoValue = 0;
SQLRETURN rc = SQLGetInfo( hdbc, nInfoType, &nInfoValue, sizeof( nInfoValue ), NULL );
ASSERT( nInfoValue & SQL_CVT_DOUBLE ); // fails
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Jan 28, 2008
Hello,
I have tried a few different things within a Derived Column transform to convert a unicode yymmdd date string to SQL Server DateTime.
Does anyone have ideas on how to do this?
Thank you for your help!
cdun2
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Apr 26, 2006
In SQL 2000 DTS, I was able to append data from an ODBC source to a SQL 2000 destination table. The destination table was created by copying an attached source table in Access to a new table, then upsizing it to SQL. The character fields come over as varchar, and that seemed to be fine with the DTS job.
Now using the same source table and the same SQL destination, only in SQL 2005 with Integration Services instead of DTS, I get an error because the connection manager interprets the source text fields as Unicode and the destination fields are varchar.
I could script the table and change the text fields in the destination table to nvarchar, but this could have adverse affect on the application that uses the destination table. Is there a way to make the connection manager see the source text fields as varchar, or have the integration package allow the append even though the destination is varchar and the source is nvarchar?
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Nov 7, 2007
My ssis package exports .xls file data into a sql server table.
The fields in the sql server table have to be nvarchar instead of varchar.
If I use varchar then the ssis package gives an error about converting unicode to non-unicode...
Another ssis package exports .csv data into the sqme sql server table as above.
This time the sql server table fields have to be of type varchar because otherwise the ssis package gives an error about converting non-uniciode to unicode...
I basically would like to have a sql server table with varchar fields and let these packages import into it.
These packages may retrieve data from .csv or .xls.
How can I resolve this?
Thanks
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Nov 7, 2007
My ssis package exports .xls file data into a sql server table.
The fields in the sql server table have to be nvarchar instead of varchar.
If I use varchar then the ssis package gives an error about converting unicode to non-unicode...
Another ssis package exports .csv data into the sqme sql server table as above.
This time the sql server table fields have to be of type varchar because otherwise the ssis package gives an error about converting non-uniciode to unicode...
I basically would like to have a sql server table with varchar fields and let these packages import into it.
These packages may retrieve data from .csv or .xls.
How can I resolve this?Thanks
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Apr 29, 2008
I'm trying to transfer some data from one table to another, in sql 2000 using SSIS. The tables are identical but have different owners. I'm getting "column __ cannot convert between unicode and non-unicode string data types". I am familiar with this when the data types don't match - however this is not the case. They are both nvarchar(50). The red x's show up on the ole db source and destination even when they are not connected. I added a conversion task and it changed nothing.
thanks for the help.
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May 1, 2007
All:
When creating a package, SSIS assumes varchar columns as Unicode (DT_WSTR) so before loading data into the target tables, I have to perform a data conversion from DT_WSTR to DT_STR.
Is there any way to turn UNICODE off? So I do not need to do the conversion? Please advise...
Rohan
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Oct 12, 2015
We have a SQL Server 2012 Enterprise live transactional database that is now growing over 1G per month and is becoming a size problem for us. It is currently at 23G. Character type fields are all Unicode and I have calculated a savings of 5G in space converting only 2 such fields averaging 206 characters each to non-Unicode, and almost 10G in space if we convert a few more of them from nchar and nvarchar to char and varchar types. These fields will never have a requirement to hold Unicode characters that cannot be in the SQL_Latin1_General_CP1_CI_AS collation as they come in as plain ASCII originally and will always do so per the protocol standard.
I’m the software architect and chief C# developer though only a DBA hack or I would not have designed our database to have Unicode fields for high volume tables that did not need Unicode for those fields when the database was created 3 years ago. I want to correct this mistake now before we finalize converting to an AlwaysOn environment to support with various performance and backup issues.
After downsizing these two or more fields, we would like to shrink the database one time to take advantage of the space savings for full backups, and for seeding an AlwaysOn environment.
1.What is the safest and most efficient conversion technique for downsizing columns from nchar/nvarchar to char/varchar types? Esp. when there are multiple fields in the same table to be converted. I tested doing an “add new column, set new=old, drop old, rename old to new” for both of the main two fields I want to convert from nvarchar(max) to varchar(max), and it took 81 minutes on our test server (4 virtual core, 8G memory) before running out of disk space even though there was 8G left on the disk, and the db has unlimited size set (Could not allocate space for object 'dbo.abc'.'PK_xyz' in database 'xxx' because the 'PRIMARY' filegroup is full). I did delete an old database before it finished after getting a disk warning so maybe it did not count that new space. Regardless it was too slow. And this was on just the two largest of these columns (12.6M rows) and only ran 2 to 3% CPU busy so seemed not very efficient, and indicated unacceptable downtime if we were to convert even these two fields much less any additional fields. Average field size for these two fields was only 206 characters or 412 bytes each. Another technique I plan to try is to create the new table def in a new schema, select into it from the old table, then move tables amongst schema and delete the old table. I have a FK and indexes to contend with on the table.
2.If I figure out how to do #1 efficiently within an acceptable maint window, what is the safest practice for doing a one-time shrink and end up with organized/rebuilt indexes and updated Statistics? I understand the logic of not doing regular shrinks and that sometimes it can actually increase the size.
3.Is there any third party tool that could take a backup and restore it into a new database with the modified field definitions or otherwise convert certain field types?
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Feb 4, 2008
Hello,
I have a ssis package that I created in the BIDS and run through a job.
the package was running very good all the time, till yesterday, when I changed the
default language of my server to hebrew (its an hebrew website).
now I get this error:
Code SnippetError: 0xC002F325 at CopyTables1, Transfer SQL Server Objects Task: Execution failed with the following error: "ERROR : errorCode=-1071636471 description=SSIS Error Code DTS_E_OLEDBERROR. An OLE DB error has occurred. Error code: 0x80004005.
An OLE DB record is available. Source: "Microsoft SQL Native Client" Hresult: 0x80004005 Description: "Unicode conversion failed".
helpFile=dtsmsg.rll helpContext=0 idofInterfaceWithError={8BDFE893-E9D8-4D23-9739-DA807BCDC2AC}".
Task failed: CopyTables1
how can I fix this error witout changing the language of the server?
Thanks.
The Kubyustus
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Aug 24, 2007
Due to some legacy requirements, I'm using an OLEDB connection with the Jet driver and creating dBASE III tables (.DBFs) as the destination for a data export. The source is SQL Server 2000. The SQL table has a bunch of varchar columns, and I can't send them directly to the .DBF because SSIS complains that it can't (implicitly) convert from non-Unicode to Unicode. UNICODE?! dBASE III is ancient. Why would Jet/SSIS assume that these .DBFs are Unicode? As it stands, I have to put a data conversion task between the source and destination and convert all the columns. It's a real pain.
And no, I don't want to make all my SQL Server columns nvarchar. Is there any setting I can put in the connection manager or the connection string to prevent this error? I've already set AlwaysUseDefaultCodePage to True on the OLEDB destination component and the default code page is 1252. That didn't work; I still got the can't convert error.
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Jan 31, 2008
I am using SSIS to extract data from one oracle server to another. When i use this SSIS package in another Server, it gives me Unicode conversion error to non unicode for some Columns which are VARCHAR2 type. I have to then used drived column and use conversion, but my question is why this error from i migrate my SSIS package to another server.
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