来自C ++的线程安全SQL Server

Question

I have a for loop in c++ parallelized using OpenMP. In the loop, I am accessing an sql server database. I have been told that if I share the same ODBC driver between threads, the data access would not be parallel. If I define different drivers for each iteration, it would be time consuming.(?) Is there a way to have different threads access the same data in a safe parallel manner?

PS: I am not writing to the database, just reading from it.

Answer 1

I have been told that if I share the same ODBC driver between threads, the data access would not be parallel.

Are you sure that you have told exactly this?

There are lot of issues about multithread, but for most ODBC drivers you can use connection-per-thread model to do reading in parallel. So connect each time you start thread (and close when thread is shut-downed). Better pattern will be usage of connection pool.