Oracle在存储过程中如何返回结果集

CREATE OR REPLACE PROCEDURE 存储过程名(
 字段名 in VARCHAR2,
 l_result OUT TYPES.RQ_REF_CURSOR -- 包里面方法名
)
is
str_sql varchar2(8000) := ‘‘; 
begin
  str_sql:=‘select *  from tabelname where ID=‘||字段名;
  open l_result for str_sql; 
END Region_Linkage;

CREATE OR REPLACE PACKAGE TYPES AS 
TYPE RQ_REF_CURSOR IS REF CURSOR;
END;

public DataTable InsertT_BUILDITEM(string REGION_ID)
    {
        DataSet ds = new DataSet();
        try
        {
            string sql = "存储过程名";
            OracleConnection con = this._sqlCon;
            OracleCommand cmd = new OracleCommand(sql, con);
            cmd.CommandType = CommandType.StoredProcedure;  //申明是存储过程
            cmd.Parameters.Add("传入参数名", OracleType.NVarChar).Value = REGION_ID;
            cmd.Parameters.Add("返回的游标名", OracleType.Cursor).Direction = ParameterDirection.Output;
            OracleDataAdapter ad = new OracleDataAdapter(cmd);
            ad.Fill(ds, "report_build");
        }
        catch (Exception e)
        {
            throw e;
        }
        return ds.Tables[0];
    }