drop table if exists t1,t2;
set @save_optimizer_use_stat_tables=@@optimizer_use_stat_tables;
CREATE VIEW table_stat AS
SELECT * FROM mysql.table_stat;
CREATE VIEW column_stat AS
SELECT db_name, table_name, column_name,
min_value, max_value,
CAST(nulls_ratio AS decimal(12,4)) AS 'nulls_ratio',
CAST(avg_length AS decimal(12,4)) AS 'avg_length',
CAST(avg_frequency AS decimal(12,4)) AS 'avg_frequency'
    FROM mysql.column_stat;
CREATE VIEW index_stat AS
SELECT db_name, table_name, index_name, prefix_arity,
CAST(avg_frequency AS decimal(12,4)) AS 'avg_frequency'
    FROM mysql.index_stat;
DELETE FROM mysql.table_stat;
DELETE FROM mysql.column_stat;
DELETE FROM mysql.index_stat;
set optimizer_use_stat_tables='preferably';
CREATE TABLE t1 (
a int NOT NULL PRIMARY KEY,
b varchar(32),
c char(16),
d date,
e double,
f bit(3),
INDEX idx1 (b, e), 
INDEX idx2(c, d),
INDEX idx3 (d),
INDEX idx4 (e, b, d)
);
INSERT INTO t1 VALUES
(0, NULL, NULL, NULL, NULL, NULL),
(7, 'xxxxxxxxxxxxxxxxxxxxxxxxxx', 'dddddddd', '1990-05-15', 0.1, b'100'),
(17, 'vvvvvvvvvvvvv', 'aaaa', '1989-03-12', 0.01, b'101'),
(1, 'vvvvvvvvvvvvv', NULL, '1989-03-12', 0.01, b'100'),
(12, 'wwwwwwwwwwwwwwwwwwwwwwwwwwww', 'dddddddd', '1999-07-23', 0.112, b'001'),
(23, 'vvvvvvvvvvvvv', 'dddddddd', '1999-07-23', 0.1, b'100'),
(8, 'vvvvvvvvvvvvv', 'aaaa', '1999-07-23', 0.1, b'100'),
(22, 'xxxxxxxxxxxxxxxxxxxxxxxxxx', 'aaaa', '1989-03-12', 0.112, b'001'),
(31, 'wwwwwwwwwwwwwwwwwwwwwwwwwwww', 'aaaa', '1999-07-23', 0.01, b'001'),
(10, NULL, 'aaaa', NULL, 0.01, b'010'),
(5, 'wwwwwwwwwwwwwwwwwwwwwwwwwwww', 'dddddddd', '1999-07-23', 0.1, b'100'),
(15, 'vvvvvvvvvvvvv', 'ccccccccc', '1990-05-15', 0.1, b'010'),
(30, NULL, 'bbbbbb', NULL, NULL, b'100'),
(38, 'zzzzzzzzzzzzzzzzzz', 'bbbbbb', NULL, NULL, NULL),
(18, 'zzzzzzzzzzzzzzzzzz', 'ccccccccc', '1990-05-15', 0.01, b'010'),
(9, 'yyy', 'bbbbbb', '1998-08-28', 0.01, NULL),
(29, 'vvvvvvvvvvvvv', 'dddddddd', '1999-07-23', 0.012, b'010'),
(3, 'yyy', 'dddddddd',  '1990-05-15', 0.112, b'010'),
(39, 'zzzzzzzzzzzzzzzzzz', 'bbbbbb', NULL, 0.01, b'100'),
(14, 'xxxxxxxxxxxxxxxxxxxxxxxxxx', 'ccccccccc', '1990-05-15', 0.1, b'100'),
(40, 'zzzzzzzzzzzzzzzzzz', 'bbbbbb', '1989-03-12', NULL, NULL),
(44, NULL, 'aaaa', '1989-03-12', NULL, b'010'),
(19, 'vvvvvvvvvvvvv', 'ccccccccc', '1990-05-15', 0.012, b'011'),
(21, 'zzzzzzzzzzzzzzzzzz', 'dddddddd', '1989-03-12', 0.112, b'100'),
(45, NULL, NULL, '1989-03-12', NULL, b'011'),
(2, 'wwwwwwwwwwwwwwwwwwwwwwwwwwww', 'ccccccccc', '1990-05-15', 0.1, b'001'),
(35, 'yyy', 'aaaa', '1990-05-15', 0.05, b'011'),
(4, 'vvvvvvvvvvvvv', 'dddddddd', '1999-07-23', 0.01, b'101'),
(47, NULL, 'aaaa', '1990-05-15', 0.05, b'010'),
(42, NULL, 'ccccccccc', '1989-03-12', 0.01, b'010'),
(32, NULL, 'bbbbbb', '1990-05-15', 0.01, b'011'),
(49, 'wwwwwwwwwwwwwwwwwwwwwwwwwwww' , 'aaaa', '1990-05-15', NULL, NULL),
(43, 'wwwwwwwwwwwwwwwwwwwwwwwwwwww' , 'bbbbbb', '1990-05-15', NULL, b'100'),
(37, 'yyy', NULL, '1989-03-12', 0.05, b'011'),
(41, 'xxxxxxxxxxxxxxxxxxxxxxxxxx', 'ccccccccc', '1990-05-15', 0.05, NULL),
(34, 'yyy', NULL, NULL, NULL, NULL),
(33, 'zzzzzzzzzzzzzzzzzz', 'dddddddd', '1989-03-12', 0.05, b'011'),
(24,  'wwwwwwwwwwwwwwwwwwwwwwwwwwww', 'dddddddd', '1990-05-15', 0.01,  b'101'),
(11, 'yyy', 'ccccccccc', '1999-07-23', 0.1, NULL),
(25, 'zzzzzzzzzzzzzzzzzz', 'bbb', '1989-03-12', 0.01,  b'101');
ANALYZE TABLE t1;
Table	Op	Msg_type	Msg_text
test.t1	analyze	status	OK
SELECT * FROM table_stat;
db_name	table_name	cardinality
test	t1	40
SELECT * FROM column_stat;
db_name	table_name	column_name	min_value	max_value	nulls_ratio	avg_length	avg_frequency
test	t1	a	0	49	0.0000	4.0000	1.0000
test	t1	b	vvvvvvvvvvvvv	zzzzzzzzzzzzzzzzzz	0.2000	17.1250	6.4000
test	t1	c	aaaa	dddddddd	0.1250	6.6571	7.0000
test	t1	d	1989-03-12	1999-07-23	0.1500	3.0000	8.5000
test	t1	e	0.01	0.112	0.2250	8.0000	6.2000
test	t1	f	1	5	0.2000	1.0000	6.4000
SELECT * FROM index_stat;
db_name	table_name	index_name	prefix_arity	avg_frequency
test	t1	PRIMARY	1	1.0000
test	t1	idx1	1	6.4000
test	t1	idx1	2	1.6875
test	t1	idx2	1	7.0000
test	t1	idx2	2	2.3846
test	t1	idx3	1	8.5000
test	t1	idx4	1	6.2000
test	t1	idx4	2	1.6875
test	t1	idx4	3	1.1304
SELECT COUNT(*) FROM t1;
COUNT(*)
40
SELECT * FROM column_stat
WHERE db_name='test' AND table_name='t1' AND column_name='a';
db_name	table_name	column_name	min_value	max_value	nulls_ratio	avg_length	avg_frequency
test	t1	a	0	49	0.0000	4.0000	1.0000
SELECT MIN(t1.a), MAX(t1.a), 
(SELECT COUNT(*) FROM t1 WHERE t1.b IS NULL) /
(SELECT COUNT(*) FROM t1) AS "NULLS_RATIO(t1.a)",
(SELECT COUNT(t1.a) FROM t1) /
(SELECT COUNT(DISTINCT t1.a) FROM t1) AS "AVG_FREQUENCY(t1.a)"
FROM t1;
MIN(t1.a)	MAX(t1.a)	NULLS_RATIO(t1.a)	AVG_FREQUENCY(t1.a)
0	49	0.2000	1.0000
SELECT * FROM column_stat
WHERE db_name='test' AND table_name='t1' AND column_name='b';
db_name	table_name	column_name	min_value	max_value	nulls_ratio	avg_length	avg_frequency
test	t1	b	vvvvvvvvvvvvv	zzzzzzzzzzzzzzzzzz	0.2000	17.1250	6.4000
SELECT MIN(t1.b), MAX(t1.b), 
(SELECT COUNT(*) FROM t1 WHERE t1.b IS NULL) /
(SELECT COUNT(*) FROM t1) AS "NULLS_RATIO(t1.b)",
(SELECT COUNT(t1.b) FROM t1) /
(SELECT COUNT(DISTINCT t1.b) FROM t1) AS "AVG_FREQUENCY(t1.b)"
FROM t1;
MIN(t1.b)	MAX(t1.b)	NULLS_RATIO(t1.b)	AVG_FREQUENCY(t1.b)
vvvvvvvvvvvvv	zzzzzzzzzzzzzzzzzz	0.2000	6.4000
SELECT * FROM column_stat 
WHERE db_name='test' AND table_name='t1' AND column_name='c';
db_name	table_name	column_name	min_value	max_value	nulls_ratio	avg_length	avg_frequency
test	t1	c	aaaa	dddddddd	0.1250	6.6571	7.0000
SELECT MIN(t1.c), MAX(t1.c), 
(SELECT COUNT(*) FROM t1 WHERE t1.c IS NULL) /
(SELECT COUNT(*) FROM t1) AS "NULLS_RATIO(t1.c)",
(SELECT COUNT(t1.c) FROM t1) /
(SELECT COUNT(DISTINCT t1.c) FROM t1) AS "AVG_FREQUENCY(t1.c)"
FROM t1;
MIN(t1.c)	MAX(t1.c)	NULLS_RATIO(t1.c)	AVG_FREQUENCY(t1.c)
aaaa	dddddddd	0.1250	7.0000
SELECT * FROM column_stat
WHERE db_name='test' AND table_name='t1' AND column_name='d';
db_name	table_name	column_name	min_value	max_value	nulls_ratio	avg_length	avg_frequency
test	t1	d	1989-03-12	1999-07-23	0.1500	3.0000	8.5000
SELECT MIN(t1.d), MAX(t1.d), 
(SELECT COUNT(*) FROM t1 WHERE t1.d IS NULL) /
(SELECT COUNT(*) FROM t1) AS "NULLS_RATIO(t1.d)",
(SELECT COUNT(t1.d) FROM t1) /
(SELECT COUNT(DISTINCT t1.d) FROM t1) AS "AVG_FREQUENCY(t1.d)"
FROM t1;
MIN(t1.d)	MAX(t1.d)	NULLS_RATIO(t1.d)	AVG_FREQUENCY(t1.d)
1989-03-12	1999-07-23	0.1500	8.5000
SELECT * FROM column_stat
WHERE db_name='test' AND table_name='t1' AND column_name='e';
db_name	table_name	column_name	min_value	max_value	nulls_ratio	avg_length	avg_frequency
test	t1	e	0.01	0.112	0.2250	8.0000	6.2000
SELECT MIN(t1.e), MAX(t1.e), 
(SELECT COUNT(*) FROM t1 WHERE t1.e IS NULL) /
(SELECT COUNT(*) FROM t1) AS "NULLS_RATIO(t1.e)",
(SELECT COUNT(t1.e) FROM t1) /
(SELECT COUNT(DISTINCT t1.e) FROM t1) AS "AVG_FREQUENCY(t1.e)"
FROM t1;
MIN(t1.e)	MAX(t1.e)	NULLS_RATIO(t1.e)	AVG_FREQUENCY(t1.e)
0.01	0.112	0.2250	6.2000
SELECT * FROM index_stat
WHERE db_name='test' AND table_name='t1' AND index_name='idx1';
db_name	table_name	index_name	prefix_arity	avg_frequency
test	t1	idx1	1	6.4000
test	t1	idx1	2	1.6875
SELECT 
(SELECT COUNT(*) FROM t1 WHERE t1.b IS NOT NULL) /
(SELECT COUNT(DISTINCT t1.b) FROM t1 WHERE t1.b IS NOT NULL)
AS 'ARITY 1',
(SELECT COUNT(*) FROM t1 WHERE t1.b IS NOT NULL AND t1.e IS NOT NULL) /
(SELECT COUNT(DISTINCT t1.b, t1.e) FROM t1
WHERE t1.b IS NOT NULL AND t1.e IS NOT NULL) 
AS 'ARITY 2';
ARITY 1	ARITY 2
6.4000	1.6875
SELECT * FROM index_stat
WHERE db_name='test' AND table_name='t1' AND index_name='idx2';
db_name	table_name	index_name	prefix_arity	avg_frequency
test	t1	idx2	1	7.0000
test	t1	idx2	2	2.3846
SELECT 
(SELECT COUNT(*) FROM t1 WHERE t1.c IS NOT NULL) /
(SELECT COUNT(DISTINCT t1.c) FROM t1 WHERE t1.c IS NOT NULL) 
AS 'ARITY 1',
(SELECT COUNT(*) FROM t1 WHERE t1.c IS NOT NULL AND t1.d IS NOT NULL) /
(SELECT COUNT(DISTINCT t1.c, t1.d) FROM t1
WHERE t1.c IS NOT NULL AND t1.d IS NOT NULL)
AS 'ARITY 2';
ARITY 1	ARITY 2
7.0000	2.3846
SELECT * FROM index_stat
WHERE db_name='test' AND table_name='t1' AND index_name='idx3';
db_name	table_name	index_name	prefix_arity	avg_frequency
test	t1	idx3	1	8.5000
SELECT 
(SELECT COUNT(*) FROM t1 WHERE t1.d IS NOT NULL) /
(SELECT COUNT(DISTINCT t1.d) FROM t1 WHERE t1.d IS NOT NULL)
AS 'ARITY 1';
ARITY 1
8.5000
SELECT * FROM index_stat
WHERE db_name='test' AND table_name='t1' AND index_name='idx4';
db_name	table_name	index_name	prefix_arity	avg_frequency
test	t1	idx4	1	6.2000
test	t1	idx4	2	1.6875
test	t1	idx4	3	1.1304
SELECT 
(SELECT COUNT(*) FROM t1 WHERE t1.e IS NOT NULL) /
(SELECT COUNT(DISTINCT t1.e) FROM t1 WHERE t1.e IS NOT NULL)
AS 'ARITY 1',
(SELECT COUNT(*) FROM t1 WHERE t1.e IS NOT NULL AND t1.b IS NOT NULL) /
(SELECT COUNT(DISTINCT t1.e, t1.b) FROM t1
WHERE t1.e IS NOT NULL AND t1.b IS NOT NULL)
AS 'ARITY 2',
(SELECT COUNT(*) FROM t1
WHERE t1.e IS NOT NULL AND t1.b IS NOT NULL AND t1.d IS NOT NULL) /  
(SELECT COUNT(DISTINCT t1.e, t1.b, t1.d) FROM t1
WHERE t1.e IS NOT NULL AND t1.b IS NOT NULL AND t1.d IS NOT NULL)
AS 'ARITY 3';
ARITY 1	ARITY 2	ARITY 3
6.2000	1.6875	1.1304
CREATE TABLE t2 LIKE t1;
ALTER TABLE t2 ENGINE=InnoDB;
INSERT INTO t2 SELECT * FROM t1;
ANALYZE TABLE t2;
Table	Op	Msg_type	Msg_text
test.t2	analyze	status	OK
SELECT * FROM table_stat;
db_name	table_name	cardinality
test	t1	40
test	t2	40
SELECT * FROM column_stat ORDER BY column_name;
db_name	table_name	column_name	min_value	max_value	nulls_ratio	avg_length	avg_frequency
test	t1	a	0	49	0.0000	4.0000	1.0000
test	t2	a	0	49	0.0000	4.0000	1.0000
test	t1	b	vvvvvvvvvvvvv	zzzzzzzzzzzzzzzzzz	0.2000	17.1250	6.4000
test	t2	b	vvvvvvvvvvvvv	zzzzzzzzzzzzzzzzzz	0.2000	17.1250	6.4000
test	t1	c	aaaa	dddddddd	0.1250	6.6571	7.0000
test	t2	c	aaaa	dddddddd	0.1250	6.6571	7.0000
test	t1	d	1989-03-12	1999-07-23	0.1500	3.0000	8.5000
test	t2	d	1989-03-12	1999-07-23	0.1500	3.0000	8.5000
test	t1	e	0.01	0.112	0.2250	8.0000	6.2000
test	t2	e	0.01	0.112	0.2250	8.0000	6.2000
test	t1	f	1	5	0.2000	1.0000	6.4000
test	t2	f	1	5	0.2000	1.0000	6.4000
SELECT * FROM index_stat ORDER BY index_name, prefix_arity, table_name;
db_name	table_name	index_name	prefix_arity	avg_frequency
test	t1	PRIMARY	1	1.0000
test	t2	PRIMARY	1	1.0000
test	t1	idx1	1	6.4000
test	t2	idx1	1	6.4000
test	t1	idx1	2	1.6875
test	t2	idx1	2	1.6875
test	t1	idx2	1	7.0000
test	t2	idx2	1	7.0000
test	t1	idx2	2	2.3846
test	t2	idx2	2	2.3846
test	t1	idx3	1	8.5000
test	t2	idx3	1	8.5000
test	t1	idx4	1	6.2000
test	t2	idx4	1	6.2000
test	t1	idx4	2	1.6875
test	t2	idx4	2	1.6875
test	t1	idx4	3	1.1304
test	t2	idx4	3	1.1304
DELETE FROM mysql.table_stat;
DELETE FROM mysql.column_stat;
DELETE FROM mysql.index_stat;
ALTER TABLE t1
DROP INDEX idx1,
DROP INDEX idx4;
ALTER TABLE t1
MODIFY COLUMN b text,
ADD INDEX idx1 (b(4), e), 
ADD INDEX idx4 (e, b(4), d);
ANALYZE TABLE t1;
Table	Op	Msg_type	Msg_text
test.t1	analyze	status	OK
SELECT * FROM column_stat;
db_name	table_name	column_name	min_value	max_value	nulls_ratio	avg_length	avg_frequency
test	t1	a	0	49	0.0000	4.0000	1.0000
test	t1	b	NULL	NULL	0.2000	17.1250	NULL
test	t1	c	aaaa	dddddddd	0.1250	6.6571	7.0000
test	t1	d	1989-03-12	1999-07-23	0.1500	3.0000	8.5000
test	t1	e	0.01	0.112	0.2250	8.0000	6.2000
test	t1	f	1	5	0.2000	1.0000	6.4000
SELECT * FROM index_stat;
db_name	table_name	index_name	prefix_arity	avg_frequency
test	t1	PRIMARY	1	1.0000
test	t1	idx2	1	7.0000
test	t1	idx2	2	2.3846
test	t1	idx3	1	8.5000
test	t1	idx1	1	NULL
test	t1	idx1	2	NULL
test	t1	idx4	1	6.2000
test	t1	idx4	2	NULL
test	t1	idx4	3	NULL
DROP TABLE t1,t2;
DELETE FROM mysql.table_stat;
DELETE FROM mysql.column_stat;
DELETE FROM mysql.index_stat;
set optimizer_use_stat_tables='never';
set names utf8;
CREATE DATABASE world;
use world;
CREATE TABLE Country (
Code char(3) NOT NULL default '',
Name char(52) NOT NULL default '',
SurfaceArea float(10,2) NOT NULL default '0.00',
Population int(11) NOT NULL default '0',
Capital int(11) default NULL,
PRIMARY KEY  (Code),
UNIQUE INDEX (Name)
) CHARACTER SET utf8 COLLATE utf8_bin;
CREATE TABLE City (
ID int(11) NOT NULL auto_increment,
Name char(35) NOT NULL default '',
Country char(3) NOT NULL default '',
Population int(11) NOT NULL default '0',
PRIMARY KEY  (ID),
INDEX (Population),
INDEX (Country) 
) CHARACTER SET utf8 COLLATE utf8_bin;
CREATE TABLE CountryLanguage (
Country char(3) NOT NULL default '',
Language char(30) NOT NULL default '',
Percentage float(3,1) NOT NULL default '0.0',
PRIMARY KEY  (Country, Language),
INDEX (Percentage)
) CHARACTER SET utf8 COLLATE utf8_bin;
set optimizer_use_stat_tables='preferably';
ANALYZE TABLE Country, City, CountryLanguage;
SELECT UPPER(db_name), UPPER(table_name), cardinality
FROM test.table_stat;
UPPER(db_name)	UPPER(table_name)	cardinality
WORLD	COUNTRY	239
WORLD	CITY	4079
WORLD	COUNTRYLANGUAGE	984
SELECT UPPER(db_name), UPPER(table_name), 
column_name, min_value, max_value, nulls_ratio, avg_length, avg_frequency
FROM test.column_stat;
UPPER(db_name)	UPPER(table_name)	column_name	min_value	max_value	nulls_ratio	avg_length	avg_frequency
WORLD	COUNTRY	Code	ABW	ZWE	0.0000	3.0000	1.0000
WORLD	COUNTRY	Name	Afghanistan	Zimbabwe	0.0000	10.1088	1.0000
WORLD	COUNTRY	SurfaceArea	0.40	17075400.00	0.0000	4.0000	1.0042
WORLD	COUNTRY	Population	0	1277558000	0.0000	4.0000	1.0575
WORLD	COUNTRY	Capital	1	4074	0.0293	4.0000	1.0000
WORLD	CITY	ID	1	4079	0.0000	4.0000	1.0000
WORLD	CITY	Name	A Coruña (La Coruña)	Ürgenc	0.0000	8.6416	1.0195
WORLD	CITY	Country	ABW	ZWE	0.0000	3.0000	17.5819
WORLD	CITY	Population	42	10500000	0.0000	4.0000	1.0467
WORLD	COUNTRYLANGUAGE	Country	ABW	ZWE	0.0000	3.0000	4.2232
WORLD	COUNTRYLANGUAGE	Language	Abhyasi	[South]Mande	0.0000	7.1778	2.1532
WORLD	COUNTRYLANGUAGE	Percentage	0.0	99.9	0.0000	4.0000	2.7640
SELECT UPPER(db_name), UPPER(table_name),
index_name, prefix_arity, avg_frequency
FROM test.index_stat;
UPPER(db_name)	UPPER(table_name)	index_name	prefix_arity	avg_frequency
WORLD	COUNTRY	PRIMARY	1	1.0000
WORLD	COUNTRY	Name	1	1.0000
WORLD	CITY	PRIMARY	1	1.0000
WORLD	CITY	Population	1	1.0467
WORLD	CITY	Country	1	17.5819
WORLD	COUNTRYLANGUAGE	PRIMARY	1	4.2232
WORLD	COUNTRYLANGUAGE	PRIMARY	2	1.0000
WORLD	COUNTRYLANGUAGE	Percentage	1	2.7640
use test;
set optimizer_use_stat_tables='never';
CREATE DATABASE world_innodb;
use world_innodb;
CREATE TABLE Country (
Code char(3) NOT NULL default '',
Name char(52) NOT NULL default '',
SurfaceArea float(10,2) NOT NULL default '0.00',
Population int(11) NOT NULL default '0',
Capital int(11) default NULL,
PRIMARY KEY  (Code),
UNIQUE INDEX (Name)
) CHARACTER SET utf8 COLLATE utf8_bin;
CREATE TABLE City (
ID int(11) NOT NULL auto_increment,
Name char(35) NOT NULL default '',
Country char(3) NOT NULL default '',
Population int(11) NOT NULL default '0',
PRIMARY KEY  (ID),
INDEX (Population),
INDEX (Country) 
) CHARACTER SET utf8 COLLATE utf8_bin;
CREATE TABLE CountryLanguage (
Country char(3) NOT NULL default '',
Language char(30) NOT NULL default '',
Percentage float(3,1) NOT NULL default '0.0',
PRIMARY KEY  (Country, Language),
INDEX (Percentage)
) CHARACTER SET utf8 COLLATE utf8_bin;
ALTER TABLE Country ENGINE=InnoDB;
ALTER TABLE City ENGINE=InnoDB;
ALTER TABLE CountryLanguage ENGINE=InnoDB;
set optimizer_use_stat_tables='preferably';
ANALYZE TABLE Country, City, CountryLanguage;
SELECT UPPER(db_name), UPPER(table_name), cardinality
FROM test.table_stat;
UPPER(db_name)	UPPER(table_name)	cardinality
WORLD	COUNTRY	239
WORLD	CITY	4079
WORLD	COUNTRYLANGUAGE	984
WORLD_INNODB	COUNTRY	239
WORLD_INNODB	CITY	4079
WORLD_INNODB	COUNTRYLANGUAGE	984
SELECT UPPER(db_name), UPPER(table_name), 
column_name, min_value, max_value, nulls_ratio, avg_length, avg_frequency
FROM test.column_stat;
UPPER(db_name)	UPPER(table_name)	column_name	min_value	max_value	nulls_ratio	avg_length	avg_frequency
WORLD	COUNTRY	Code	ABW	ZWE	0.0000	3.0000	1.0000
WORLD	COUNTRY	Name	Afghanistan	Zimbabwe	0.0000	10.1088	1.0000
WORLD	COUNTRY	SurfaceArea	0.40	17075400.00	0.0000	4.0000	1.0042
WORLD	COUNTRY	Population	0	1277558000	0.0000	4.0000	1.0575
WORLD	COUNTRY	Capital	1	4074	0.0293	4.0000	1.0000
WORLD	CITY	ID	1	4079	0.0000	4.0000	1.0000
WORLD	CITY	Name	A Coruña (La Coruña)	Ürgenc	0.0000	8.6416	1.0195
WORLD	CITY	Country	ABW	ZWE	0.0000	3.0000	17.5819
WORLD	CITY	Population	42	10500000	0.0000	4.0000	1.0467
WORLD	COUNTRYLANGUAGE	Country	ABW	ZWE	0.0000	3.0000	4.2232
WORLD	COUNTRYLANGUAGE	Language	Abhyasi	[South]Mande	0.0000	7.1778	2.1532
WORLD	COUNTRYLANGUAGE	Percentage	0.0	99.9	0.0000	4.0000	2.7640
WORLD_INNODB	COUNTRY	Code	ABW	ZWE	0.0000	3.0000	1.0000
WORLD_INNODB	COUNTRY	Name	Afghanistan	Zimbabwe	0.0000	10.1088	1.0000
WORLD_INNODB	COUNTRY	SurfaceArea	0.40	17075400.00	0.0000	4.0000	1.0042
WORLD_INNODB	COUNTRY	Population	0	1277558000	0.0000	4.0000	1.0575
WORLD_INNODB	COUNTRY	Capital	1	4074	0.0293	4.0000	1.0000
WORLD_INNODB	CITY	ID	1	4079	0.0000	4.0000	1.0000
WORLD_INNODB	CITY	Name	A Coruña (La Coruña)	Ürgenc	0.0000	8.6416	1.0195
WORLD_INNODB	CITY	Country	ABW	ZWE	0.0000	3.0000	17.5819
WORLD_INNODB	CITY	Population	42	10500000	0.0000	4.0000	1.0467
WORLD_INNODB	COUNTRYLANGUAGE	Country	ABW	ZWE	0.0000	3.0000	4.2232
WORLD_INNODB	COUNTRYLANGUAGE	Language	Abhyasi	[South]Mande	0.0000	7.1778	2.1532
WORLD_INNODB	COUNTRYLANGUAGE	Percentage	0.0	99.9	0.0000	4.0000	2.7640
SELECT UPPER(db_name), UPPER(table_name),
index_name, prefix_arity, avg_frequency
FROM test.index_stat;
UPPER(db_name)	UPPER(table_name)	index_name	prefix_arity	avg_frequency
WORLD	COUNTRY	PRIMARY	1	1.0000
WORLD	COUNTRY	Name	1	1.0000
WORLD	CITY	PRIMARY	1	1.0000
WORLD	CITY	Population	1	1.0467
WORLD	CITY	Country	1	17.5819
WORLD	COUNTRYLANGUAGE	PRIMARY	1	4.2232
WORLD	COUNTRYLANGUAGE	PRIMARY	2	1.0000
WORLD	COUNTRYLANGUAGE	Percentage	1	2.7640
WORLD_INNODB	COUNTRY	PRIMARY	1	1.0000
WORLD_INNODB	COUNTRY	Name	1	1.0000
WORLD_INNODB	CITY	PRIMARY	1	1.0000
WORLD_INNODB	CITY	Population	1	1.0467
WORLD_INNODB	CITY	Country	1	17.5819
WORLD_INNODB	COUNTRYLANGUAGE	PRIMARY	1	4.2232
WORLD_INNODB	COUNTRYLANGUAGE	PRIMARY	2	1.0000
WORLD_INNODB	COUNTRYLANGUAGE	Percentage	1	2.7640
use test;
DROP DATABASE world;
DROP DATABASE world_innodb;
DELETE FROM mysql.table_stat;
DELETE FROM mysql.column_stat;
DELETE FROM mysql.index_stat;
DROP VIEW test.table_stat;
DROP VIEW test.column_stat;
DROP VIEW test.index_stat;
set optimizer_use_stat_tables=@save_optimizer_use_stat_tables;