How to read a CLOB column in Oracle using OleDb ?
- by T.Falise
Hi,
I have created a table on an Oracle 10g database with this structure :
create table myTable
(
id number(32,0) primary key,
myData clob
)
I can insert rows in the table without any problem, but when I try to read data from the table using OleDb connection, I get an exception.
Here is the code I use :
using (OleDbConnection dbConnection = new OleDbConnection("ConnectionString"))
{
dbConnection.Open();
OleDbCommand dbCommand = dbConnection.CreateCommand();
dbCommand.CommandText = "SELECT * FROM myTable WHERE id=?";
dbCommand.Parameters.AddWithValue("ID", id);
OleDbDataReader dbReader = dbCommand.ExecuteReader();
}
The exception details seems to point on an unsupported data type :
System.Data.OleDb.OleDbException:
Unspecified error Oracle error occurred, but error message could not be retrieved from Oracle.
Data type is not supported.
Does anyone know how I can read this data using the OleDb connection ?
PS : The driver used in this case is the Microsoft one.
