GH-3530: The Oracle driver does not implement DbDataReader.Get* methods. Encapsulate their DbDataReader with the DirectCastDbDataReader.

Author: David Ellingsworth

src/NHibernate/Driver/OracleDataClientDriverBase.cs

@@ -242,6 +242,11 @@ public override DbCommand UnwrapDbCommand(DbCommand command)
 			return command is OracleDbCommandWrapper wrapper ? wrapper.Command : command;
 		}
 
+		public override DbDataReader ExecuteReader(DbCommand cmd)
+		{
+			return new DirectCastDbDataReader(cmd.ExecuteReader());
+		}
+
 		System.Type IEmbeddedBatcherFactoryProvider.BatcherFactoryClass => typeof(OracleDataClientBatchingBatcherFactory);
 	}
 }