Oracle.DataAccess.Client.OracleCommand represents an (Oracle-) SQL statement. OracleCommand derives from System.Data.Common.DbCommand. InitialLONGFetchSize property to be immensly valuable when I needed to extract long raw data from a table: if this value is set to -1, an ADO.NET program can access the entire length of the binary data that is stored in a long raw, even if larger than 32 KB! Oracle.DataAccess.Types.OracleBinary class for an example that demonstrates how long raws are extracted from tables.