digoal@126.com writes:
> Bitmap Heap Scan on public.t11 (cost=93.95..354.20 rows=10020 width=4)
> (actual time=1.447..3.907 rows=9999 loops=1)
> Output: id
> Recheck Cond: (t11.id < 10000)
> Buffers: shared hit=22
> -> Bitmap Index Scan on t11_pkey (cost=0.00..91.44 rows=10020 width=0)
> (actual time=1.370..1.370 rows=9999 loops=1)
> Index Cond: (t11.id < 10000)
> Buffers: shared hit=8
> Total runtime: 4.931 ms
We don't bother to store/show the indexscan's startup cost in such cases,
since it has no effect whatsoever on subsequent planning: the total cost
of the indexscan will go into the parent's startup cost anyway.
regards, tom lane
