I won't have an opportunity to upgrade a site for client from 3.8 to 3.9 then 4.0 for quite some time. I would like to take advantage though of newer table indexes in 3.9 and 4.0 releases for db performance reasons, on my 3.8 db schema. Could someone provide a list or script of those introduced since the release of 3.8 please, or point me in the right direction? Many thanks.