关于odbc超时的处理

2018-09-03 12:57:16 568 阅读 AI 写同款 · GEO 优化AI 选题数据监测一键分发 ›

告别手动编译！用ODBC桥接让QT5.14.2轻松操作MySQL8数据库本文介绍了如何通过ODBC桥接技术，无需手动编译即可实现QT5.14.2与MySQL8数据库的无缝连接。详细讲解了Windows和Linux平台下的配置步骤，并提供了QT中使用QODBC连接MySQL的代码示例和性能优化技巧，显著提升开发效率和部署便利性。阅读详情

我这里链接无线网络，经常断开，环境没法改变。程序要向一个远程数据库实时写数据，超时不成功就补传。现在超时，系统抛对话框，怎样才能不由系统抛对话框，本程序处理超时异常呢？
odbc链接Oracle11g，操作用的mfc的cRecordset 。

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智能电网中的智能调度与优化算法研究本文研究智能电网中的智能调度与优化算法，旨在提高电网运行的效率与可靠性，减少能源浪费和设备故障的风险。在智能电网日益复杂化的背景下，传统的调度方法已难以满足高效、稳定的运行要求，因此亟需借助先进的优化算法对电网进行智能调度。本文第一深入分析智能电网调度中的关键问题与挑战，探讨优化算法在智能电网中的应用现状，并分析常见的优化算法，如遗传算法、粒子群算法和模拟退火算法。随后，本文构建智能电网的调度优化数学模型，并对电网负荷、发电模型及约束条件进行详细建模。在算法部分，本文提出改进的粒子群算法和遗传算法，并结合M 阅读详情

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切换为时间正序

赵4老师 2018-09-03

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CDatabase::SetLoginTimeout
void SetLoginTimeout( DWORD dwSeconds );

Parameters

dwSeconds

The number of seconds to allow before a connection attempt times out.

Remarks

Call this member function — before you call OpenEx or Open — to override the default number of seconds allowed before an attempted data source connection times out. A connection attempt might time out if, for example, the DBMS is not available. Call SetLoginTimeout after you construct the uninitialized CDatabase object but before you call OpenEx or Open.

The default value for login timeouts is 15 seconds. Not all data sources support the ability to specify a login timeout value. If the data source does not support timeout, you get trace output but not an exception. A value of 0 means “infinite.”

CDatabase Overview | Class Members | Hierarchy Chart

See Also CDatabase::OnSetOptions, CDatabase::SetQueryTimeout

CDatabase::SetQueryTimeout
void SetQueryTimeout( DWORD dwSeconds );

Parameters

dwSeconds

The number of seconds to allow before a query attempt times out.

Remarks

Call this member function to override the default number of seconds to allow before subsequent operations on the connected data source time out. An operation might time out due to network access problems, excessive query processing time, and so on. Call SetQueryTimeout prior to opening your recordset or prior to calling the recordset’s AddNew, Update or Delete member functions if you want to change the query timeout value. The setting affects all subsequent Open, AddNew, Update, and Delete calls to any recordsets associated with this CDatabase object. Changing the query timeout value for a recordset after opening does not change the value for the recordset. For example, subsequent Move operations do not use the new value.

The default value for query timeouts is 15 seconds. Not all data sources support the ability to set a query timeout value. If you set a query timeout value of 0, no timeout occurs; the communication with the data source may hang. This behavior may be useful during development. If the data source does not support timeout, you get trace output but not an exception.

CDatabase Overview | Class Members | Hierarchy Chart

See Also CDatabase::SetLoginTimeout

zgl7903 2018-09-03

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捕获 CDBException 自己处理？
try
{
……
}
catch(CDBException *e)
{
####
e->Delete();
}

sevancheng 2018-09-03

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写入失败的保存在队列，由另外1个线程去写

关于odbc超时的处理

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