"Ilia Kantor" <ilia@obnovlenie.ru> writes:
> Bitmap Heap Scan on objects_hier (cost=60.29..179.57 rows=80 width=600)
> (actual time=0.835..1.115 rows=138 loops=1)
vs
> Merge Join (cost=62.33..576.80 rows=1117 width=600) (actual
> time=0.542..2.898 rows=138 loops=1)
Hmm, sure looks from here like the bitmap plan is faster.
regards, tom lane