On Mon, Jul 22, 2024 at 3:52 AM Alexander Korotkov <aekorotkov@gmail.com> wrote:
> Please, check that there is still possibility to the generate BitmapOr plan.
>
> # explain select * from t where (b = 1 or b = 2 or a = 2 or a = 3);
> QUERY PLAN
> ------------------------------------------------------------------------------------
> Bitmap Heap Scan on t (cost=326.16..835.16 rows=14999 width=12)
> Recheck Cond: ((b = 1) OR (b = 2) OR (a = 2) OR (a = 3))
> -> BitmapOr (cost=326.16..326.16 rows=20000 width=0)
> -> Bitmap Index Scan on t_b_c_idx (cost=0.00..151.29
> rows=10000 width=0)
> Index Cond: (b = 1)
> -> Bitmap Index Scan on t_b_c_idx (cost=0.00..151.29
> rows=10000 width=0)
> Index Cond: (b = 2)
> -> Bitmap Index Scan on t_a_b_idx (cost=0.00..4.29 rows=1 width=0)
> Index Cond: (a = 2)
> -> Bitmap Index Scan on t_a_b_idx (cost=0.00..4.29 rows=1 width=0)
> Index Cond: (a = 3)
Forgot to mention that I have to
# set enable_seqscan = off;
to get this plan.
------
Regards,
Alexander Korotkov
Supabase
