[Plugin: Posts 2 Posts] nested relationship condition

hi,
i have a relationship:
venue > event > session.

my query gets the venue with a condition for a meta_key and then retrieves all the events and sessions.
then i run a condition through every session if to include the event or not.

is it possible to set the get relationship to not get events with a condition on the session? or do i already have to get all the events and then set the condition on the sessions?

so ideally i’d want to get all the venues. then
get each connected event only if the session meta query with date bigger than today.

or would it be faster and possible to somehow merge two queries, one for sessions and ones for venues. and then when getting the events within the venues one, only if the id is included in my sessions query?

at the moment neither is going to have much impact, but when the events database grows big, it’ll have to get all the events in the database every time which i would guess be a bit slow.

https://www.ads-software.com/extend/plugins/posts-to-posts/