Hello all postgres developers,
Recently pg started to make a query plan, which I can not understand.
The pan is here: https://explain.depesz.com/s/Lvw0#source
The interesting part is at the top:
```
Aggregate (cost=1132443.98..1132443.99 rows=1 width=24) (actual rows=1
loops=1)
-> Merge Join
=?UTF-8?Q?Stanis=C5=82aw_Skonieczny?= writes:
> What bothers me is that the inner plan cost (7430940) is higher than the
> outer plan cost (1131699).
I think it is estimating (based on knowledge of the ranges of join keys
in the two relations) that that input subplan won't need to be run to
compl
