Question

我正在使用.NET OracleClient（在C＃中），并且我的查询返回的结果不正确（行数少）。

这是我见过这种情况的唯一时间。

我可以将查询剪切/粘贴到SQl Developer或sql * plus中，并返回正确的281行。当它在.NET应用程序中运行时，数据表只有280（我知道缺少哪条记录）。

有没有人见过这种情况或有什么想法？

这是C＃代码

string llQuery = "select DISTINCT " +
                 "case when aliased_item = 'TIME SERIES' then 'TS_ALIAS' else 'TIME_SERIES' end data_type, " +
                 "cwms_ts_id " +
                 "from (select aliased_item, SUBSTR(cwms_ts_id, instr(cwms_ts_id, '.') + 1, LENGTH(cwms_ts_id) - instr(cwms_ts_id, '.')) cwms_ts_id " +
                 "from CWMS_V_TS_ID2) " +                             
                 "union all " +
                 "select DISTINCT 'LOCATION_LEVEL' data_type, cwms_ts_id " +
                 "from (select SUBSTR(location_level_id, instr(location_level_id, '.') + 1, LENGTH(location_level_id) - instr(location_level_id, '.')) cwms_ts_id " +
                 "from CWMS_V_LOCATION_LEVEL) " +                             
                 " order by data_type desc, cwms_ts_id";                             
try
{
    OracleConnection connection_obj = new OracleConnection();
    connection_obj.ConnectionString = connStr;
    connection_obj.Open();

    using (OracleCommand command = new OracleCommand())
    {
        command.Connection = connection_obj;
        command.CommandType = CommandType.Text;
        command.CommandText = llQuery;

        DataTable dtLvl = new DataTable();
        dtLvl.Load(command.ExecuteReader());

这是查询，复制/粘贴，字符“，+删除等

select DISTINCT 
case when aliased_item = 'TIME SERIES' then 'TS_ALIAS' else 'TIME_SERIES' end      data_type, 
cwms_ts_id 
from (select aliased_item, SUBSTR(cwms_ts_id, instr(cwms_ts_id, '.') + 1, LENGTH(cwms_ts_id) - instr(cwms_ts_id, '.')) cwms_ts_id 
from CWMS_V_TS_ID2)
union all 
select DISTINCT 'LOCATION_LEVEL' data_type, cwms_ts_id 
from (select SUBSTR(location_level_id, instr(location_level_id, '.') + 1, LENGTH(location_level_id) - instr(location_level_id, '.')) cwms_ts_id 
from CWMS_V_LOCATION_LEVEL)

缺失的记录恰好是

data_type   cwms_ts_id
=========   ========================================
TS_ALIAS    Code-ProjectStatus.Const.1Day.1Day.ALIAS

在应用程序中执行查询后， dtLvl.Rows.Count = 280不是281，并且上述记录不存在。

在接下来看看为什么会发生这种情况时不知所措 - 正如我所提到的，我从来没有见过它

感谢任何想法！

.NET OracleClient查询返回的结果错误少于预期

0 个答案: