Another library(driver) to manage the database ?!

There will be PDO support, if someone in the community steps up to port the driver for CI4
app/Libraries looks like a good place for a different driver. However, if that driver follows the lines of our existing drivers, then it might fit into app/Database/Handlers/RedBean

Re your inconvenience ... what "theme" are you referring to. Your reference is unclear. If it pertains to something other than database management, it might be less confusing in a different thread.