DataTables in 4.3.x don't have built-in sorting but you can implement a custom one, otherwise built-in sorting is available since 4.5.0.
Thank you for your answer, Michal.
What about compatibility issues with the combination of technologies we're trying to use? (Weblogic 12c + JBoss Seam 2.3.1 + RichFaces 4.5.)
I really don't know, we do not test RichFaces on WebLogic and we do not use Seam in our applications.