I’ve made two session proposals for Percona Live conference:

• Window functions in MariaDB covers Window functions, a new feature in MariaDB 10.2. As far as I know, this the first attempt to have a talk about this feature.
• Exploring MariaDB Query Optimizer with ANALYZE for statements is about making use of ANALYZE (actually, ANALYZE FORMAT=JSON mostly) from MariaDB 10.1 to narrow down query optimizer problems. I did introductory talks about this feature before. This time, I intend to go a bit deeper and focus not on the ANALYZE command itself, but on its use cases.

if you feel these talks are worth it, please vote!