【已解决】bitmap_union类型的字段查询很慢怎么排查？

版本：2.0.12

agg模型的表，其中key为pt、code，value为code_bm

CREATE TABLE ad (
pt date,
code varchar(100),
code_bm bitmap BITMAP_UNION,
xxx
)

如下两个查询耗时差不多，bitmap字段加速效果不明显，这个要如何排查呢？

select
  pt,
  count(distinct code)
from
  ad
where
  pt between '20230101' and '20231231'
group by
  pt

select
  pt,
  count(distinct code_bm)
from
  ad
where
  pt between '20230101' and '20231231'
group by
  pt