mariadb/mysql-test/t/stat_tables.test

--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_switch=@@optimizer_switch;
set optimizer_switch='extended_keys=off';
 
--disable_query_log
--disable_result_log
--disable_warnings
--source include/dbt3_s001.inc
create index i_p_retailprice on part(p_retailprice);
delete from mysql.table_stats;
delete from mysql.column_stats;
delete from mysql.index_stats;
ANALYZE TABLE
customer, lineitem, nation, orders, part, partsupp, region, supplier;
FLUSH TABLE mysql.table_stats, mysql.index_stats;
--enable_warnings
--enable_result_log
--enable_query_log

select * from mysql.table_stats;
select * from mysql.index_stats;

set optimizer_switch=@save_optimizer_switch; 

set @save_optimizer_switch=@@optimizer_switch;
set optimizer_switch='index_condition_pushdown=off';

let $Q5=
select n_name, sum(l_extendedprice * (1 - l_discount)) as revenue
from customer, orders, lineitem, supplier, nation, region
where c_custkey = o_custkey and l_orderkey = o_orderkey
      and l_suppkey = s_suppkey and c_nationkey = s_nationkey
      and s_nationkey = n_nationkey and n_regionkey = r_regionkey
      and r_name = 'AMERICA' and o_orderdate >= date '1995-01-01'
      and o_orderdate < date '1995-01-01' + interval '1' year
group by n_name
order by revenue desc;

eval EXPLAIN $Q5;
eval $Q5;

set optimizer_switch=@save_optimizer_switch;

delete from mysql.index_stats;

--disable_query_log
--disable_result_log
--disable_warnings
ANALYZE TABLE
customer, lineitem, nation, orders, part, partsupp, region, supplier;
FLUSH TABLE mysql.table_stats, mysql.index_stats;
--enable_warnings
--enable_result_log
--enable_query_log

select * from mysql.table_stats;
select * from mysql.index_stats;

select * from mysql.table_stats where table_name='orders';
select * from mysql.index_stats where table_name='orders';
select (select cardinality from mysql.table_stats where table_name='orders') /
       (select avg_frequency from mysql.index_stats 
          where index_name='i_o_orderdate' and prefix_arity=1) as n_distinct; 
select count(distinct o_orderdate) from orders;
select (select cardinality from mysql.table_stats where table_name='orders') /
       (select avg_frequency from mysql.index_stats 
          where index_name='i_o_custkey' and prefix_arity=1) as n_distinct;
select count(distinct o_custkey) from orders; 
show index from orders;
select index_name, column_name, cardinality from information_schema.statistics
  where table_name='orders';

set @save_optimizer_switch=@@optimizer_switch;
set optimizer_switch='index_condition_pushdown=off';

eval EXPLAIN $Q5;
eval $Q5;

set optimizer_switch=@save_optimizer_switch;

let $Q8=
select o_year,
       sum(case when nation = 'UNITED STATES' then volume else 0 end) /
       sum(volume) as mkt_share
from (select extract(year from o_orderdate) as o_year,
             l_extendedprice * (1-l_discount) as volume, 
             n2.n_name as nation
      from part, supplier, lineitem, orders, customer, 
           nation n1, nation n2, region
      where p_partkey = l_partkey and s_suppkey = l_suppkey
            and l_orderkey = o_orderkey and o_custkey = c_custkey
            and c_nationkey = n1.n_nationkey and n1.n_regionkey = r_regionkey
            and r_name = 'AMERICA' and s_nationkey = n2.n_nationkey
            and o_orderdate between date '1995-01-01' and date '1996-12-31'
            and p_type = 'STANDARD BRUSHED STEEL' ) as all_nations
group by o_year
order by o_year;

eval EXPLAIN $Q8;
eval $Q8;


let $Q9=
select nation, o_year, sum(amount) as sum_profit
from (select n_name as nation, 
      extract(year from o_orderdate) as o_year,
      l_extendedprice * (1 - l_discount) - ps_supplycost * l_quantity as amount
      from part, supplier, lineitem, partsupp, orders, nation
      where s_suppkey = l_suppkey and ps_suppkey = l_suppkey
            and ps_partkey = l_partkey and p_partkey = l_partkey
            and o_orderkey = l_orderkey and s_nationkey = n_nationkey
            and p_name like '%green%') as profit
group by nation, o_year
order by nation, o_year desc;

eval EXPLAIN $Q9;
eval $Q9;


set @save_optimizer_switch=@@optimizer_switch;
set optimizer_switch='extended_keys=on';

let $QQ1=
select o_orderkey, p_partkey
  from part, lineitem, orders
  where p_retailprice > 1100 and o_orderdate='1997-01-01' 
        and o_orderkey=l_orderkey and p_partkey=l_partkey;

eval EXPLAIN $QQ1;
eval $QQ1;

set optimizer_switch=@save_optimizer_switch;


DROP DATABASE dbt3_s001;

use test;

--echo #
--echo # Bug mdev-473: ANALYZE table locked for write
--echo # 

set use_stat_tables='complementary';

create table t1 (i int);

lock table t1 write;
analyze table t1;
alter table t1 add column a varchar(8);

drop table t1;

--echo #
--echo # Bug mdev-487: memory leak in ANALYZE with stat tables
--echo # 

SET  use_stat_tables = 'preferably';

CREATE TABLE t1 (a INT);
INSERT INTO t1 VALUES (1),(2);
DELETE FROM t1 WHERE a=1;

ANALYZE TABLE t1;

DROP TABLE t1;

--echo #
--echo # Bug mdev-518: corrupted/missing statistical tables
--echo # 

CREATE TABLE t1 (i int) ENGINE=MyISAM;
INSERT INTO t1 VALUES (1),(2);

FLUSH TABLE t1;
SET use_stat_tables='never';
EXPLAIN SELECT * FROM t1;

--move_file $MYSQLTEST_VARDIR/mysqld.1/data/mysql/table_stats.MYD $MYSQLTEST_VARDIR/mysqld.1/data/mysql/table_stats.MYD.save

FLUSH TABLES;
SET use_stat_tables='preferably';
--disable_warnings
EXPLAIN SELECT * FROM t1;
--enable_warnings

# Cleanup
--move_file $MYSQLTEST_VARDIR/mysqld.1/data/mysql/table_stats.MYD.save $MYSQLTEST_VARDIR/mysqld.1/data/mysql/table_stats.MYD
DROP TABLE t1;

set use_stat_tables=@save_use_stat_tables;

--echo #
--echo # Bug mdev-5204: invalid impossible where after reading const tables  
--echo #                when use_stat_tables = 'preferably'
--echo #

set use_stat_tables = 'preferably';

CREATE TABLE t1 (id int PRIMARY KEY) ENGINE=MyISAM;
INSERT INTO t1 VALUES (1),(2);
ANALYZE TABLE t1;

CREATE TABLE t2 (name char(3)) ENGINE=MyISAM;
ANALYZE TABLE t2;
INSERT INTO t2 VALUES ('USA'),('AUS');

SELECT * FROM t1 STRAIGHT_JOIN t2 WHERE name IN ( 'AUS','YEM' ) AND id = 1;
EXPLAIN
SELECT * FROM t1 STRAIGHT_JOIN t2 WHERE name IN ( 'AUS','YEM' ) AND id = 1;

ANALYZE TABLE t2;

SELECT * FROM t1 STRAIGHT_JOIN t2 WHERE name IN ( 'AUS','YEM' ) AND id = 1;
EXPLAIN
SELECT * FROM t1 STRAIGHT_JOIN t2 WHERE name IN ( 'AUS','YEM' ) AND id = 1;

DROP TABLE t1,t2;

set use_stat_tables=@save_use_stat_tables;