selectivity_from_histogram >1.0 for col=const on DOUBLE_PREC_HB histogram

create table t10 (a int);

-- Fill the table, will provide INSERTs below

analyze table t10 persistent for all;

set optimizer_trace=1;

explain select * from t10  where a in (91303);

+------+-------------+-------+------+---------------+------+---------+------+-------+----------+-------------+

| id   | select_type | table | type | possible_keys | key  | key_len | ref  | rows  | filtered | Extra       |

+------+-------------+-------+------+---------------+------+---------+------+-------+----------+-------------+

|    1 | SIMPLE      | t10   | ALL  | NULL          | NULL | NULL    | NULL | 99840 |   100.00 | Using where |

+------+-------------+-------+------+---------------+------+---------+------+-------+----------+-------------+

select json_detailed(json_extract(trace, '$**.selectivity_for_columns')) from information_schema.optimizer_trace\G

*************************** 1. row ***************************

json_detailed(json_extract(trace, '$**.selectivity_for_columns')): [

    [

        {

            "column_name": "a",

            "ranges": 

            ["91303 <= a <= 91303"],

            "selectivity_from_histogram": 18.28543534

        }

    ]

]

create table bucket(a int);  # This holds how many rows we hold in a bucket.

insert into bucket select 1 from seq_1_to_780;

create table one_third_of_bucket(a int);  # one-third of a bucket

insert into one_third_of_bucket select 1 from seq_1_to_260;

create table t10 (a int);

insert into t10 select 0 from bucket, seq_1_to_4;

insert into t10 select 8693 from one_third_of_bucket;

insert into t10 select 8694 from one_third_of_bucket;

insert into t10 select 8695 from one_third_of_bucket;

insert into t10 select 34783 from one_third_of_bucket;

insert into t10 select 34784 from one_third_of_bucket;

insert into t10 select 34785 from one_third_of_bucket;

insert into t10 select 34785 from bucket, seq_1_to_8;

insert into t10 select 65214 from one_third_of_bucket;

insert into t10 select 65215 from one_third_of_bucket;

insert into t10 select 65216 from one_third_of_bucket;

insert into t10 select 65216 from bucket, seq_1_to_52;

insert into t10 select 65217 from one_third_of_bucket;

insert into t10 select 65218 from one_third_of_bucket;

insert into t10 select 65219 from one_third_of_bucket;

insert into t10 select 65219 from bucket;

insert into t10 select 73913 from one_third_of_bucket;

insert into t10 select 73914 from one_third_of_bucket;

insert into t10 select 73915 from one_third_of_bucket;

insert into t10 select 73915 from bucket, seq_1_to_40;

insert into t10 select 78257 from one_third_of_bucket;

insert into t10 select 78258 from one_third_of_bucket;

insert into t10 select 78259 from one_third_of_bucket;

insert into t10 select 91300 from one_third_of_bucket;

insert into t10 select 91301 from one_third_of_bucket;

insert into t10 select 91302 from one_third_of_bucket;

insert into t10 select 91302 from bucket, seq_1_to_6;

insert into t10 select 91303 from one_third_of_bucket;

insert into t10 select 91304 from one_third_of_bucket;

insert into t10 select 91305 from one_third_of_bucket;

insert into t10 select 91305 from bucket, seq_1_to_8;

insert into t10 select  99998 from one_third_of_bucket;

insert into t10 select  99999 from one_third_of_bucket;

insert into t10 select 100000 from one_third_of_bucket;