DataAdapter.Fill doesn't include PrimaryKey Info

Question

We are using Oracle 9i and Odp.net verion 9.2.0.401.
I am using the data adapter on a command that is a simple select statement in our code. The code is written generically to support multiple providers using ado.net.
The problem I am having is that when I call Fill with "adapter.MissingSchemaAction = MissingSchemaAction.AddWithKey" specified that DataTable comes back with no primary key. Other providers bring this information back.
I read in the manual that indicates that "schema and key information is not brought back even if MissingSchemaAction = MissingSchemaAction.AddWithKey is specified". This seem to function a bit different than other providers (both SqlServer and Oracle).
How would I load this info when I load the table using fill?
Thanks in advance
Sample of our code:
public static DataTable LoadTable(string name)
IDbTransaction transaction = null;
IDbConnection connection = null;
DataSet dataSet = new DataSet();
string query = string.Format("SELECT * FROM {0}", name);
DataTable tableToReturn = null;
try
OpenConnection(out connection, out transaction);
IDbCommand command = InterfaceDataProvider.CreateCommand(transaction.Connection, transaction, query);
DbDataAdapter adapter = InterfaceDataProvider.CreateAdapter(command);
adapter.MissingSchemaAction = MissingSchemaAction.AddWithKey;
adapter.Fill(dataSet, name);
tableToReturn = dataSet.Tables[name];
finally
CloseConnection(connection);
return tableToReturn;

Answer 1

It's unfortunate that the OracleDataAdapter doesn't retrieve this information. Anyway, here's how to do it yourself:
  static void derivePK(DataTable t, string name, OracleConnection con)
    OracleCommand c = new OracleCommand(@"select column_name
                                            from user_cons_columns ucc,
                                            user_constraints uc 
                                            where  ucc.constraint_name =  uc.constraint_name
                                            and    uc.constraint_type = 'P'
                                            and uc.table_name = upper(:1) order by ucc.position",con);
    cmd.Parameters.Add("name",name);
    System.Collections.ArrayList keyColumnList = new System.Collections.ArrayList();
    using (OracleDataReader r = c.ExecuteReader()) 
    while (r.Read())
      keyColumnList.Add(t.Columns[(string)r[0]]);
    DataColumn[] keyColumns = (DataColumn[])keyColumnList.ToArray(typeof(DataColumn));
    t.PrimaryKey = keyColumns;
  }David