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我正在使用 .NET OracleClient（在 C# 中），并且我有一个查询返回的结果不正确（行数少于预期）。

这是我唯一一次看到这种情况发生。

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

有没有人见过这种情况发生或对为什么有任何想法？

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，它被复制/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)

丢失的记录恰好是

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 而不是 281，并且上面指示的记录不存在。

不知道下一步该去哪里寻找为什么会发生这种情况——正如我所提到的，我以前从未见过它发生过

感谢您的任何想法！

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0 回答 0