I am connecting to an Oracle DB and the connection works, but I get the following error for some of the columns:
Description: Column "RESOURCE_NAME" cannot convert between unicode and non-unicode string data types. Value for RESOURCE_NAME:
VARCHAR2(200 BYTE) VARCHAR(200 BYTE)I can connect to the Oracle DB via Oracle SQL Developer without any issues. Also, I have the SSIS package setting Run64BitRuntime = False.
The Oracle data type VARCHAR2 appears to be equivalent to NVARCHAR in SQL Server, or DT_WSTR in SSIS. Reference
You will have to convert using the Data Conversion Transformation, or CAST or CONVERT functions in SQL Server.
the easiest way around this to to open the ssis package in notepad (the dstx file) and do a global find and replace of all instances of validateExternalMetadata="True" with validateExternalMetadata="False".
note: we encountered this issue when connecting to an Oracle 11g database on Linux through ssis.
If the package works in one machine and doesn't in other; Try setting the NLS_LANG to right language, territory and character set and test the package.
[Command Prompt]> set NLS_LANG=AMERICAN_AMERICA.WE8ISO8859P1 on oledb source ->advanced editor options->input/output columns->output columns->select RESOURCE_NAME column and change Data type as DT_WSTR and length also u can change as required
You can use SQL command in SSIS and use CONVERT or CAST. If SSIS still gives you an error its because of the metadata. Here is how you can fix it.
If everything failed from above. Create a table variable and insert the data into it. Then select all records as source. use SET NOCOUNT ON in the script.