It does not look like Subselects are Fingerprinted properly. Per this it
looks like all different subselects are "fingerprinted" all to the same
This is 1.8.1
Peter Zaitsev, CEO, Percona
Percona Live 2018 Open Source Database Conference
<https://www.percona.com/live/18/> April 23 - 25, 2018 Santa Clara,CA Get
Your Ticket Now!, Inquire about Sponsorship!