Qt qsqlquery. Is exec() sync or async?

Question

I'm using firebird embedded db with Qt provider. For working with db I use qsqlquery::exec() function. Is this function sync or async?

Answer 1

QSqlQuery::exec() is blocking (synchronous) but not atomic, the OS can interrupt the thread and run another thread inbetween.

Note that you shouldn't share a single database connection across threads anyway, so there shouldn't be problems.