Oracle 10g新增 BINARY_DOUBLE 数据类型，而.NET暂不支持这个类型，查询时需要转换为 NUMBER。
eg：
"SELECT RAWTOHEX(OID) AS OID,RAWTOHEX(FLAVOROID) AS FLAVOROID,BISMATRIX," +
"CAST(SERVERTOCLIENT0 AS NUMBER(38,15)) AS SERVERTOCLIENT0," +
"CAST(SERVERTOCLIENT1 AS NUMBER(38,15)) AS SERVERTOCLIENT1 from table"