Postgresql window function - OVER

[StepanGavrilov]

If there is any possibility to use window postgresql function OVER ()
in Tortoise orm.

I would like something similar:

select entity.id, count(entity.id) OVER () as f_count
from entities
join table1 tt1 on entities.id = tt1.id;

[long2ice]

What about RawSQL or custom function