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See more: C++ ADO Async
I need to execute sql queries in asynchronous manner.
Any examples ?
Thanks in advice.
Posted 27-Nov-12 9:51am

1 solution

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Solution 1

Hi iron,
For exampple it is possible to do with C++/Qt....
Sometimes, it's necessary to execute some queries to database in asynchronous way (multi-thread), for example to avoid to freeze a GUI if a query is too long to execute.
To make easier to work with asynchronous queries, QxOrm library provides qx::QxDaoAsync class.
This class executes a query in another thread and returns the queryFinished() SIGNAL when query is terminated.
To use qx::QxDaoAsync class, you just have to :
be careful to work only with classes implementing qx::IxPersistable interface ;
create an instance of qx::QxDaoAsync type (for example, a property of a QWidget derived class) ;
connect a SLOT to the qx::QxDaoAsync::queryFinished() SIGNAL (for example, a SLOT of a QWidget derived class) ;
run a query using one of qx::QxDaoAsync::asyncXXXX() methods.

Please see here:[^]

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