表适配器查询给出在 SQL Server Management Studio 中无法重现的错误
我正在维护在 Visual Studio 的表适配器设计器中定义的一些查询,这些查询在 Windows 窗体应用程序 (.NET 2.0) 的一些报告中使用。 当我运行应用程序并执行特定查询时,出现错误:将表达式转换为数据类型smallmoney 时出现算术溢出错误。我很惊讶,因为查询应该产生相当小的数量,所以我使用 SQL 探查器捕获查询,并在 SQL Server Management Studio 中运行完全相同的查询(显然在同一个数据库上)。这里查询运行没有问题,小钱是“33.00”;不在 214,748.3647 边界附近。
为了使调试复杂化,这个问题只发生在客户端的 QA 环境中,并且在本地无法重现(并且由于法律原因无法将数据库复制到开发环境)。这使得调试周期非常慢,因为在客户端环境中构建和部署新版本需要长达 30 分钟的时间,因此我非常感谢一些提示,这些提示将使我能够通过尽可能少的实验来查明这个问题。在 SQL Studio 中摆弄查询对我没有多大帮助,因为我无法让它产生相同的错误。
以下是查询:
SELECT CONVERT(varchar, Events.Occurred, 102) AS Day, Users.Name, COUNT(*) AS Deleted_Invoices, SUM(i.TotalExVat + i.TotalVat) AS Total
FROM Events WITH (nolock) INNER JOIN
Users WITH (nolock) ON Events.UserID = Users.UserID INNER JOIN
Types AS t WITH (nolock) ON t.TypeID = Events.TypeID INNER JOIN
InvoicesEvents AS ie ON ie.EventID = Events.EventID INNER JOIN
Invoices AS i ON i.InvoiceID = ie.InvoiceID
WHERE (Events.Occurred BETWEEN @startDate AND @endDate) AND (t.Name = 'InvoiceDeleted')
GROUP BY CONVERT(varchar, Events.Occurred, 102), Users.Name
ORDER BY Day, Users.Name
TotalExVat 和 TotalVat issmallmoney not null。数据表中的“Total”字段映射到“System.Decimal”。我可以尝试在表达式中将小钱转换为金钱,但当它在 SQL Studio 中运行良好时,为什么我必须这样做呢?
我得到的例外是: 异常类型:System.Data.SqlClient.SqlException 异常消息:将表达式转换为数据类型smallmoney 时出现算术溢出错误。
at System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection)
at System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection)
at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj)
at System.Data.SqlClient.TdsParser.Run(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj)
at System.Data.SqlClient.SqlDataReader.HasMoreRows()
at System.Data.SqlClient.SqlDataReader.ReadInternal(Boolean setTimeout)
at System.Data.SqlClient.SqlDataReader.Read()
at System.Data.Common.DataAdapter.FillLoadDataRow(SchemaMapping mapping)
at System.Data.Common.DataAdapter.FillFromReader(DataSet dataset, DataTable datatable, String srcTable, DataReaderContainer dataReader, Int32 startRecord, Int32 maxRecords, DataColumn parentChapterColumn, Object parentChapterValue)
at System.Data.Common.DataAdapter.Fill(DataTable[] dataTables, IDataReader dataReader, Int32 startRecord, Int32 maxRecords)
at System.Data.Common.DbDataAdapter.FillInternal(DataSet dataset, DataTable[] datatables, Int32 startRecord, Int32 maxRecords, String srcTable, IDbCommand command, CommandBehavior behavior)
at System.Data.Common.DbDataAdapter.Fill(DataTable[] dataTables, Int32 startRecord, Int32 maxRecords, IDbCommand command, CommandBehavior behavior)
at System.Data.Common.DbDataAdapter.Fill(DataTable dataTable)
at ... (calling code)
更新
将 SUM(i.TotalExVat + i.TotalVat) 更改为 SUM(i.TotalExVat) + SUM(i.TotalVat) 消除了错误,但我仍然不明白为什么,因为没有在产生的结果中小钱溢出。
更新2
新问题。现在,smallmoney 铸造问题消失了,但现在我遇到了超时问题。如果在 SSMS 中运行,同一报告中使用的另一个查询大约需要 5-6 秒。如果在表适配器中运行,则会在 10 分钟后超时。其他查询按预期运行,产生与 SSMS 中相同的结果。这支持了我的怀疑,即当我的表适配器尝试查询数据库时,出现了一些问题。
更新 3
这开始变得奇怪了。 Smallmoney 问题查询是用于生成报告的一系列查询中的第五个查询。在应用第一个更新中提到的修复后,我在第一个查询中遇到超时。当小钱在后面的查询中溢出时,该查询运行没有问题。 原因可能是什么?
当smallmoney查询给出错误时运行的查询在其工作时不运行:
SELECT u.Name AS Username, rea.Text AS DeleteReason, COUNT(*) AS DeletedRegistrations, SUM(r.Shipments) AS DeletedShipments
FROM RecordingsEvents AS re WITH (nolock) INNER JOIN
Events AS e WITH (nolock) ON e.EventID = re.EventID INNER JOIN
Reasons AS rea WITH (nolock) ON rea.ReasonID = e.ReasonID INNER JOIN
Users AS u WITH (nolock) ON u.UserID = e.UserID INNER JOIN
Recordings AS r ON r.RecordingID = re.RecordingID
WHERE (rea.Category = 'DeleteRecording') AND (e.Occurred BETWEEN @startDate AND @endDate)
GROUP BY u.Name, rea.Text
ORDER BY Username, MAX(rea.SortOrder)
如果我限制smallmoney查询给出结果30.0的日期间隔,则上述查询有效。如果我将日期间隔扩大到小钱查询也曾经失败的时间段,我就会超时。当smallmoney 查询失败时,在smallmoney 查询之前运行的查询运行正常时,如何获得超时? 在 SSMS 中运行所有查询都按预期工作。 顺便说一句,查询同步运行。
I am maintaining some queries defined in the table adapters designer in Visual Studio used in some reports in a Windows Forms application (.NET 2.0).
When I run the application and execute a particular query I get an error: Arithmetic overflow error converting expression to data type smallmoney. I was surprised, since the query should produce rather small amounts so I captured the query with an SQL profiler and ran the exact same query in SQL Server Management Studio (on the same database obviously). Here the query runs without problems and the smallmoney is "33.00"; not anywhere near the 214,748.3647 boundary.
To complicate debugging this problem only occurs in the client's QA environment and is not reproducible locally (and the database cannot be copied to the development environment for legal reasons). This makes the debugging cycle very slow since building and deploying new versions in the client's environment takes up to 30 minutes, so I would very much appreciate some hints that will make me pinpoint this problem with as little experimentation as possible. Fiddling with the query in SQL Studio doesn't help me much, since I can't make it produce the same errors.
Here is the query:
SELECT CONVERT(varchar, Events.Occurred, 102) AS Day, Users.Name, COUNT(*) AS Deleted_Invoices, SUM(i.TotalExVat + i.TotalVat) AS Total
FROM Events WITH (nolock) INNER JOIN
Users WITH (nolock) ON Events.UserID = Users.UserID INNER JOIN
Types AS t WITH (nolock) ON t.TypeID = Events.TypeID INNER JOIN
InvoicesEvents AS ie ON ie.EventID = Events.EventID INNER JOIN
Invoices AS i ON i.InvoiceID = ie.InvoiceID
WHERE (Events.Occurred BETWEEN @startDate AND @endDate) AND (t.Name = 'InvoiceDeleted')
GROUP BY CONVERT(varchar, Events.Occurred, 102), Users.Name
ORDER BY Day, Users.Name
TotalExVat and TotalVat is smallmoney not null. The "Total" field in the data table is mapped to "System.Decimal". I could try to cast the smallmoney to a money in the expression, but why would I have to do that when it runs fine in the SQL studio?
The exception I get is:
Exception type: System.Data.SqlClient.SqlException
Exception message: Arithmetic overflow error converting expression to data type smallmoney.
at System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection)
at System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection)
at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj)
at System.Data.SqlClient.TdsParser.Run(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj)
at System.Data.SqlClient.SqlDataReader.HasMoreRows()
at System.Data.SqlClient.SqlDataReader.ReadInternal(Boolean setTimeout)
at System.Data.SqlClient.SqlDataReader.Read()
at System.Data.Common.DataAdapter.FillLoadDataRow(SchemaMapping mapping)
at System.Data.Common.DataAdapter.FillFromReader(DataSet dataset, DataTable datatable, String srcTable, DataReaderContainer dataReader, Int32 startRecord, Int32 maxRecords, DataColumn parentChapterColumn, Object parentChapterValue)
at System.Data.Common.DataAdapter.Fill(DataTable[] dataTables, IDataReader dataReader, Int32 startRecord, Int32 maxRecords)
at System.Data.Common.DbDataAdapter.FillInternal(DataSet dataset, DataTable[] datatables, Int32 startRecord, Int32 maxRecords, String srcTable, IDbCommand command, CommandBehavior behavior)
at System.Data.Common.DbDataAdapter.Fill(DataTable[] dataTables, Int32 startRecord, Int32 maxRecords, IDbCommand command, CommandBehavior behavior)
at System.Data.Common.DbDataAdapter.Fill(DataTable dataTable)
at ... (calling code)
Update
Changing SUM(i.TotalExVat + i.TotalVat) to SUM(i.TotalExVat) + SUM(i.TotalVat) eliminated the error, but I still don't understand why, since there is no smallmoney overflow in the produced results.
Update 2
New problems. Now the smallmoney casting problem is gone, but now I have a timeout problem. Another query used in the same report runs in about 5-6 seconds if run in SSMS. If run in a table adapter it times out after 10 minutes. Other queries run as expected producing the same result as in SSMS. This supports my suspicion that something rotten is going when my table adapter attempts to query the database.
Update 3
This is starting to get weird. The smallmoney problem query was fill query number five in a series of queries used to generate a report. After I applied the fix mentioned in the first Update I get timeouts in the first of the queries. That query ran without problems, when the smallmoney was overflowing in the later query.
What could be the reason for that?
The query running when the smallmoney query gives and error and NOT running when its working:
SELECT u.Name AS Username, rea.Text AS DeleteReason, COUNT(*) AS DeletedRegistrations, SUM(r.Shipments) AS DeletedShipments
FROM RecordingsEvents AS re WITH (nolock) INNER JOIN
Events AS e WITH (nolock) ON e.EventID = re.EventID INNER JOIN
Reasons AS rea WITH (nolock) ON rea.ReasonID = e.ReasonID INNER JOIN
Users AS u WITH (nolock) ON u.UserID = e.UserID INNER JOIN
Recordings AS r ON r.RecordingID = re.RecordingID
WHERE (rea.Category = 'DeleteRecording') AND (e.Occurred BETWEEN @startDate AND @endDate)
GROUP BY u.Name, rea.Text
ORDER BY Username, MAX(rea.SortOrder)
The above query works if I limit the date interval where the smallmoney query gave the result 30.0. If I expand the date interval to a period where the smallmoney query also used to fail I get a timeout. How can I get a timeout in a query that runs BEFORE the smallmoney query when it runs fine when the smallmoney query fails?
Running all queries in SSMS works as expected.
BTW the queries run synchronously.
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你能看看两者的执行计划吗? (可从下面检索)
我想知道其中一个是否最终制定了一个
SUMS
记录的计划,但后来最终被过滤掉了。Can you look at the execution plans for both? (Retrievable from the below)
I wonder if one of them ends up with a plan that
SUMS
records that later end up getting filtered out.在查询中,您是否尝试将值转换为 MONEY?
就像
当加法发生时,这些值似乎保持在相同的类型,所以任何溢出都会破坏它。
SMALLMONEY 看起来确实是一个非常小的使用类型。
看看这个例子
In the query, have you tried casting the values to MONEY?
Something like
It would seem that when the addition happens, the values are kept in the same type, so any overflow will break that.
SMALLMONEY does seem like a very small type to use.
Have a look at this example
值得检查的是,更改 SSMS 的会话属性以匹配 .net 连接的会话属性是否能让您复制错误。
特别值得关注的是
ARITHABORT
,我发现它会导致与您过去描述的问题类似的问题。默认情况下,我相信 SSMS 连接将 arithabort 设置为打开,而 .net 将其设置为关闭。您可以使用 SET ARITHABORT [ ON | ] 更改 SSMS 中的属性。 OFF] 命令。您可能需要检查探查器跟踪以确认 .Net 环境中的设置。
It's worth checking whether changing the session properties for SSMS to match those of your .net connection enables you to replicate the error.
In particular, it's worth looking at
ARITHABORT
, which I've seen cause similar issues to the one you describe in the past. By default, I believe SSMS connections set arithabort on, whereas .net sets it off.You can change the property in SSMS using the
SET ARITHABORT [ ON | OFF]
command. You may need to examine a profiler trace to confirm the settings in the .Net environment.