I am getting following error:
NQODBCSQL_STATE:HY000nQSError:10058 A general error has occurred,
nQSEoor:43093 An error occurred while processing the EXECUTE PHYSICAL statement.
nQSError:17001 Oracle Error code: 3114, message: ORA-03114: not connected to oracle at OCI call OCIStmtExecute,
nQSErro:17010 SQL statement preparation failed.

 you have to define the data source name in the tnsnames.ora.