cannot disable hashSetOp

hello

I looked on issue with consuming memory by query

HashSetOp Except  (cost=0.00..297100.69 rows=594044 width=30) ->  Append  (cost=0.00..234950.32 rows=8286716 width=30)
    ->  Subquery Scan on "*SELECT* 1"  (cost=0.00..168074.62
 
rows=5940431 width=29)             ->  Seq Scan on ac  (cost=0.00..108670.31 rows=5940431 width=29)       ->  Subquery
Scanon "*SELECT* 2"  (cost=0.00..66875.70
 
rows=2346285 width=32)             ->  Seq Scan on artist_credit  (cost=0.00..43412.85
rows=2346285 width=32)


I was surprised, because I didn't find any way how to disable hashing.

Is there some way?

Pavel