--source include/have_stat_tables.inc

select @@global.use_stat_tables;
select @@session.use_stat_tables;

set @save_use_stat_tables=@@use_stat_tables;

set use_stat_tables='preferably';

--disable_warnings
DROP DATABASE IF EXISTS dbt3_s001;
--enable_warnings

CREATE DATABASE dbt3_s001;

use dbt3_s001;

set @save_optimizer_use_condition_selectivity=@@optimizer_use_condition_selectivity;
set @save_histogram_size=@@histogram_size;

--disable_query_log
--disable_result_log
--disable_warnings
--source include/dbt3_s001.inc

ANALYZE TABLE
customer, lineitem, nation, orders, part, partsupp, region, supplier;
FLUSH TABLE
customer, lineitem, nation, orders, part, partsupp, region, supplier;
--enable_warnings
--enable_result_log
--enable_query_log

let $Q20=
select sql_calc_found_rows
       s_name, s_address
from supplier, nation
where s_suppkey in (select ps_suppkey from partsupp
                    where ps_partkey in (select p_partkey from part
                                         where p_name like 'g%')
                          and ps_availqty >
                              (select 0.5 * sum(l_quantity)
                               from lineitem
                               where l_partkey = ps_partkey
                                     and l_suppkey = ps_suppkey
                                     and l_shipdate >= date('1993-01-01')
                                     and l_shipdate < date('1993-01-01') +
                                         interval '1' year ))
and s_nationkey = n_nationkey
and n_name = 'UNITED STATES'
order by s_name
limit 10;

eval EXPLAIN EXTENDED $Q20;
eval $Q20;

set optimizer_use_condition_selectivity=3;

eval EXPLAIN EXTENDED $Q20;
eval $Q20;

set histogram_size=15;

flush table part;

ANALYZE TABLE part PERSISTENT FOR COLUMNS(p_name) INDEXES();

set optimizer_use_condition_selectivity=4;

eval EXPLAIN EXTENDED $Q20;
eval $Q20; 

set histogram_size=24;

flush table nation;

ANALYZE TABLE nation PERSISTENT FOR COLUMNS(n_name) INDEXES();

eval EXPLAIN EXTENDED $Q20;
eval $Q20; 

DROP DATABASE dbt3_s001;

set histogram_size=@save_histogram_size;
set optimizer_use_condition_selectivity=@save_optimizer_use_condition_selectivity;

set use_stat_tables=@save_use_stat_tables;