Issue while accessing a SQL Server table over OTG

Question

Hi,
I have been learning oracle for about 1.5 years and am just starting to learn some OTG pieces. I am wondering about an issue. The issue is:
"We need help with an issue we are having while accessing a SQL Server table over OTG. We are getting the following error message in Oracle :
ORA-28500: connection from ORACLE to a non-Oracle system returned this message:
[Oracle][ODBC SQL Server Driver]Unicode conversion failed {HY000}
The column it is failing on is "-----------" in the view --------------- in the SQL Server database pointed to by the Oracle DB Link ------------------- thats created in the Oracle instances ---- and -----.
This was working before, but is now failing, we suspect its due to new multi-byte data being added to the base table in the above column."
I took out the details and added ---- instead. I am wondering your guys thoughts on fixing this issue and helping me learn along the way. Thanks

Answer 1

Hi Mike,
Thanks for the response, here are the details:
1. What is the character set of the Oracle RDBMS being used. What is returned by -
select * from nls_database_parameters;
NLS_CHARACTERSET
AL32UTF8
NLS_NCHAR_CHARACTERSET
UTF8
We get SQL_Latin1_General_CP1_C1_AS and 1252 as Collation Property and Code Page
The datatype of the column in question in SQL Server is nvarchar(100).
When I do a describe on the SQL Server view ( desc CK_DATA_FOR_OPL@------- ), I get the error below;
ERROR: object CK_DATA_FOR_OPL does not exist
Select * from CK_DATA_FOR_OPL@------ where rownum =1 does get me a row.
create table tmp_tab as
Select * from CK_DATA_FOR_OPL@----- where rownum =1;
desc tmp_tab shows the datatype of the said column in the table created in Oracle as NVARCHAR2(150).
Not sure why a column defined with size 100 in SQL Server should come across as 150 when seen over OTG. We see something similar in DB2 tables we access over OTG as well.
Edited by: 993950 on Mar 15, 2013 8:49 AM