drop table if exists t0,t1,t2,t3;
select @@global.use_stat_tables;
@@global.use_stat_tables
COMPLEMENTARY
select @@session.use_stat_tables;
@@session.use_stat_tables
COMPLEMENTARY
set @save_use_stat_tables=@@use_stat_tables;
set use_stat_tables='preferably';
set @save_optimizer_use_condition_selectivity=@@optimizer_use_condition_selectivity;
set @save_histogram_size=@@histogram_size;
set @save_histogram_type=@@histogram_type;
set join_cache_level=2;
set @@global.histogram_size=0,@@local.histogram_size=0;
set histogram_type='single_prec_hb';
set optimizer_use_condition_selectivity=3;
#
# MDEV-31067: selectivity_from_histogram >1.0 for a DOUBLE_PREC_HB histogram
#
create table t0(a int);
insert into t0 select 1 from seq_1_to_78;
create table t1(a int);
insert into t1 select 1 from seq_1_to_26;
create table t10 (a int);
insert into t10 select 0 from t0, seq_1_to_4;
insert into t10 select 8693 from t1;
insert into t10 select 8694 from t1;
insert into t10 select 8695 from t1;
insert into t10 select 34783 from t1;
insert into t10 select 34784 from t1;
insert into t10 select 34785 from t1;
insert into t10 select 34785 from t0, seq_1_to_8;
insert into t10 select 65214 from t1;
insert into t10 select 65215 from t1;
insert into t10 select 65216 from t1;
insert into t10 select 65216 from t0, seq_1_to_52;
insert into t10 select 65217 from t1;
insert into t10 select 65218 from t1;
insert into t10 select 65219 from t1;
insert into t10 select 65219 from t0;
insert into t10 select 73913 from t1;
insert into t10 select 73914 from t1;
insert into t10 select 73915 from t1;
insert into t10 select 73915 from t0, seq_1_to_40;
insert into t10 select 78257 from t1;
insert into t10 select 78258 from t1;
insert into t10 select 78259 from t1;
insert into t10 select 91300 from t1;
insert into t10 select 91301 from t1;
insert into t10 select 91302 from t1;
insert into t10 select 91302 from t0, seq_1_to_6;
insert into t10 select 91303 from t1;
insert into t10 select 91304 from t1;
insert into t10 select 91305 from t1;
insert into t10 select 91305 from t0, seq_1_to_8;
insert into t10 select  99998 from t1;
insert into t10 select  99999 from t1;
insert into t10 select 100000 from t1;
set use_stat_tables=preferably;
analyze table t10 persistent for all;
Table	Op	Msg_type	Msg_text
test.t10	analyze	status	Engine-independent statistics collected
test.t10	analyze	status	OK
flush tables;
set @tmp=@@optimizer_trace;
set optimizer_trace=1;
explain select * from t10  where a in (91303);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t10	ALL	NULL	NULL	NULL	NULL	9984	Using where
# Must have selectivity_from_histogram <= 1.0:
select json_detailed(json_extract(trace, '$**.selectivity_for_columns')) as sel
from information_schema.optimizer_trace;
sel
[
    [
        {
            "column_name": "a",
            "ranges": 
            ["91303 <= a <= 91303"],
            "selectivity_from_histogram": 0.035714283
        }
    ]
]
set optimizer_trace=@tmp;
drop table t0,t1,t10;
set optimizer_use_condition_selectivity= @save_optimizer_use_condition_selectivity;
set histogram_size=@save_histogram_size;
set use_stat_tables= @save_use_stat_tables;
#
# End of 10.4 tests
#
#
# Clean up
#
set @@global.histogram_size=@save_histogram_size;