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Qt-interest Archive, January 2007
QtSql and threads

Message 1 in thread

Hi.. Happy new year to all.

Currently I use Qt4 SQL classes. I can't find anything about QtSql and
threads support in Qt docs.. So looks like it isn't thread safe. So is it
any way to use QtSql classes (I need only QSqlQuery) from more than one
threads? Will it work if I will use 2 QtSqlDatabase instances?

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Message 2 in thread

Hi,

> 
> Currently I use Qt4 SQL classes. I can't find anything about QtSql and
> threads support in Qt docs.. So looks like it isn't thread safe.

Have a look at this "Threads and the SQL Module" paragraph:
http://doc.trolltech.com/4.2/threads.html#threads-and-the-sql-module

Also thread-safe functions are identified as such in the QSqlDatabase 
documentation page:
http://doc.trolltech.com/4.2/qsqldatabase.html

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Message 3 in thread

On Tue, Jan 02, 2007 at 12:51:19AM +0100, Dimitri wrote:
> Hi,
> 
> >
> >Currently I use Qt4 SQL classes. I can't find anything about QtSql and
> >threads support in Qt docs.. So looks like it isn't thread safe.
> 
> Have a look at this "Threads and the SQL Module" paragraph:
> http://doc.trolltech.com/4.2/threads.html#threads-and-the-sql-module
> 
> Also thread-safe functions are identified as such in the QSqlDatabase 
> documentation page:
> http://doc.trolltech.com/4.2/qsqldatabase.html
> 

Oops.. So looks like i can Just do QSqlDatabase::clone() and then use new
database instance in second thread.

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