数据库编程与C#编程互译

今天有一段代码，先是用程序实现。

闲来无聊，又用存储过程实现了一次。

程序中实现。

        /// <summary>
        /// 根据区域和用户名获取可访问的国家
        /// </summary>
        public DataTable GetCountry(string area,string user)
        {
            try
            {
                NHibernate.Engine.ISessionImplementor FactoryImpl = FrameWork.Repository.NHb.SessionBuilder.CreateSession().GetSessionImplementation();
                OracleCommand cmd = new OracleCommand();

                string strWhere1 = "1=1 ";
                string strWhere2 = "1=1 ";

                if (!String.IsNullOrEmpty(user))
                {
                    strWhere1 += String.Format( "and vrs.u_logname = '{0}'",user);
                }

                if (!String.IsNullOrEmpty(area))
                {
                    strWhere2 += String.Format("and cc.sales_area = '{0}'", area);
                }
                string sqlstr =String.Format( @"select distinct scg.customer_country,cc.sales_area,cc.countrye,cc.countryc
                                  from ifce.vw_rsh_user              vru,
                                       ele_bill.sap_customer_general scg,
                                       shipuser.countryce            cc
                                 where vru.sap_cust_no = scg.customer_number
                                   and scg.customer_country = cc.short_e
                                   and vru.u_loginid in
                                       (select column_value countryId
                                          from table(splitstr_fun((select vrs.u_loginid || ',' ||
                                                                         vrs.agent_user_id
                                                                    from ifce.vw_rsh_user vrs
                                                                   where {0}),
                                                                  ',')))
                                   and {1}", strWhere1, strWhere2);

                cmd.Parameters.Clear();

                OracleConnection conn = (OracleConnection)FactoryImpl.Connection;
                cmd.Connection = conn;
                cmd.CommandType = System.Data.CommandType.Text;
                cmd.CommandText = sqlstr;
                cmd.ExecuteNonQuery();

                OracleDataAdapter da = new OracleDataAdapter(cmd);
                System.Data.DataSet ds = new System.Data.DataSet();
                da.Fill(ds);
                return ds.Tables[];
            }
            catch (Exception e)
            {
                throw new FrameWork.THrException("Fail!", e);
            }
        }

存储过程中实现。

  /*******************************************************/
  /* 根据区域和用户名获取可访问的国家                    */
  /* create bby wufei 2013 11 26                         */
  /*******************************************************/
procedure Query_Country(p_area varchar2,
                       p_user varchar2,
                       x_cur  out cur_forlog) is
  strWhere1 varchar2(100);
  strWhere2 varchar2(100);
    sqlstr   varchar2(1000);
begin

  strWhere1 := '1=1 ';
  strWhere2 := '1=1 ';

      if (p_user is not null) then
      strWhere1 := strWhere1 || ' and vrs.u_logname = ''''||''' || p_user || '''||''''';
    end if;

/*  if p_area is not null then
    strWhere2 := strWhere2 || 'and cc.sales_area =''' || p_area '''';
  end if;*/

  sqlstr:='select distinct scg.customer_country,
                    cc.sales_area,
                    cc.countrye,
                    cc.countryc
      from ifce.vw_rsh_user              vru,
           ele_bill.sap_customer_general scg,
           shipuser.countryce            cc
     where vru.sap_cust_no = scg.customer_number
       and scg.customer_country = cc.short_e
       and vru.u_loginid in (select column_value countryId
                               from table(splitstr_fun((select vrs.u_loginid || '','' ||
                                                              vrs.agent_user_id
                                                         from ifce.vw_rsh_user vrs
                                                        where ' || strWhere1 ||'),
                                                       '','')))
       and '|| strWhere2 ;
dbms_output.put_line(sqlstr);
  open x_cur for
   sqlstr;

exception
  when others then
     null;
end Query_Country;

其中存储过程中还是有一些亮点的，比如将将查询table化，比如splitstr_fun。