CREATE PROCEDURE populate_t1(load_even INT)
BEGIN
DECLARE i int DEFAULT 1;
START TRANSACTION;
WHILE (i <= 10000) DO
IF i%2 = 0 AND load_even = 1 THEN
INSERT INTO t1 VALUES (i, i, CONCAT('a', i));
END IF;
IF i%2 != 0 AND load_even != 1 THEN
INSERT INTO t1 VALUES (i, i, CONCAT('a', i));
END IF;
SET i = i + 1;
END WHILE;
COMMIT;
END|
SELECT @@innodb_fill_factor;
@@innodb_fill_factor
100
CREATE TABLE t1(
class	INT,
id	INT,
title	VARCHAR(100)
) ENGINE=InnoDB ROW_FORMAT=REDUNDANT;
SELECT COUNT(*) FROM t1;
COUNT(*)
5000
/* Create index. */
CREATE INDEX idx_id ON t1(id);
CREATE INDEX idx_title ON t1(title);
/* Check table. */
CHECK TABLE t1;
Table	Op	Msg_type	Msg_text
test.t1	check	status	OK
/* Select by index. */
EXPLAIN SELECT * FROM t1 WHERE id = 10;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	ref	idx_id	idx_id	5	const	1	
EXPLAIN SELECT * FROM t1 WHERE title = 'a10';
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	ref	idx_title	idx_title	103	const	1	Using index condition
SELECT * FROM t1 WHERE id = 10;
class	id	title
10	10	a10
SELECT * FROM t1 WHERE title = 'a10';
class	id	title
10	10	a10
SELECT * FROM t1 WHERE id = 5000;
class	id	title
5000	5000	a5000
SELECT * FROM t1 WHERE title = 'a5000';
class	id	title
5000	5000	a5000
SELECT * FROM t1 WHERE id = 10000;
class	id	title
10000	10000	a10000
SELECT * FROM t1 WHERE title = 'a10000';
class	id	title
10000	10000	a10000
SELECT * FROM t1 WHERE id = 10010;
class	id	title
SELECT * FROM t1 WHERE title = 'a10010';
class	id	title
/*Insert/Update/Delete. */
DELETE FROM t1 WHERE id < 4010 AND id > 3990;
INSERT INTO t1 VALUES(4000, 4000, 'b4000');
UPDATE t1 SET title = CONCAT('b', id) WHERE id < 3010 AND id > 2990;
SELECT * FROM t1 WHERE id = 3000;
class	id	title
3000	3000	b3000
SELECT * FROM t1 WHERE title = 'a3000';
class	id	title
SELECT * FROM t1 WHERE title = 'b3000';
class	id	title
3000	3000	b3000
SELECT * FROM t1 WHERE id = 4000;
class	id	title
4000	4000	b4000
SELECT * FROM t1 WHERE title = 'a4000';
class	id	title
SELECT * FROM t1 WHERE title = 'b4000';
class	id	title
4000	4000	b4000
SELECT * FROM t1 WHERE id = 4001;
class	id	title
SELECT * FROM t1 WHERE title = 'a4001';
class	id	title
SELECT COUNT(*) FROM t1;
COUNT(*)
9992
/* Add column. */
ALTER TABLE t1 ADD COLUMN content TEXT;
CHECK TABLE t1;
Table	Op	Msg_type	Msg_text
test.t1	check	status	OK
SELECT * FROM t1 WHERE id = 10;
class	id	title	content
10	10	a10	NULL
SELECT * FROM t1 WHERE title = 'a10';
class	id	title	content
10	10	a10	NULL
SELECT * FROM t1 WHERE id = 5000;
class	id	title	content
5000	5000	a5000	NULL
SELECT * FROM t1 WHERE title = 'a5000';
class	id	title	content
5000	5000	a5000	NULL
SELECT * FROM t1 WHERE id = 10000;
class	id	title	content
10000	10000	a10000	NULL
SELECT * FROM t1 WHERE title = 'a10000';
class	id	title	content
10000	10000	a10000	NULL
SELECT * FROM t1 WHERE id = 10010;
class	id	title	content
SELECT * FROM t1 WHERE title = 'a10010';
class	id	title	content
/* Drop column. */
ALTER TABLE t1 DROP COLUMN content;
CHECK TABLE t1;
Table	Op	Msg_type	Msg_text
test.t1	check	status	OK
SELECT * FROM t1 WHERE id = 10;
class	id	title
10	10	a10
SELECT * FROM t1 WHERE title = 'a10';
class	id	title
10	10	a10
SELECT * FROM t1 WHERE id = 5000;
class	id	title
5000	5000	a5000
SELECT * FROM t1 WHERE title = 'a5000';
class	id	title
5000	5000	a5000
SELECT * FROM t1 WHERE id = 10000;
class	id	title
10000	10000	a10000
SELECT * FROM t1 WHERE title = 'a10000';
class	id	title
10000	10000	a10000
SELECT * FROM t1 WHERE id = 10010;
class	id	title
SELECT * FROM t1 WHERE title = 'a10010';
class	id	title
DROP TABLE t1;
CREATE TABLE t1(
a INT PRIMARY KEY,
b TEXT,
c TEXT) ENGINE=InnoDB ROW_FORMAT=REDUNDANT;
ALTER TABLE t1 ADD INDEX `idx` (a,b(5));
SELECT CHAR_LENGTH(b) FROM t1 WHERE a=4975;
CHAR_LENGTH(b)
10000
SELECT b=REPEAT(CONCAT('a',4975),2000) FROM t1 WHERE a=4975 AND b like 'a4975%';
b=REPEAT(CONCAT('a',4975),2000)
1
UPDATE t1 SET b = REPEAT(CONCAT('b',4975),2000) WHERE a=4975 AND b like 'a4975%';
SELECT b=REPEAT(CONCAT('a',4975),2000) FROM t1 WHERE a=4975 AND b like 'a4975%';
b=REPEAT(CONCAT('a',4975),2000)
SELECT b=REPEAT(CONCAT('b',4975),2000) FROM t1 WHERE a=4975 AND b like 'b4975%';
b=REPEAT(CONCAT('b',4975),2000)
1
DELETE FROM t1 WHERE a=4975 AND b like 'b4975%';
SELECT b=REPEAT(CONCAT('b',4975),2000) FROM t1 WHERE a=4975 AND b like 'b4975%';
b=REPEAT(CONCAT('b',4975),2000)
ALTER TABLE t1 DROP COLUMN c;
CHECK TABLE t1;
Table	Op	Msg_type	Msg_text
test.t1	check	status	OK
SELECT CHAR_LENGTH(b) FROM t1 WHERE a=4975;
CHAR_LENGTH(b)
DROP TABLE t1;
DROP PROCEDURE populate_t1;
CREATE PROCEDURE populate_t1(load_even INT)
BEGIN
DECLARE i int DEFAULT 1;
START TRANSACTION;
WHILE (i <= 10000) DO
IF i%2 = 0 AND load_even = 1 THEN
INSERT INTO t1 VALUES (i, i, CONCAT('a', i));
END IF;
IF i%2 != 0 AND load_even != 1 THEN
INSERT INTO t1 VALUES (i, i, CONCAT('a', i));
END IF;
SET i = i + 1;
END WHILE;
COMMIT;
END|
SELECT @@innodb_fill_factor;
@@innodb_fill_factor
100
CREATE TABLE t1(
class	INT,
id	INT,
title	VARCHAR(100)
) ENGINE=InnoDB ROW_FORMAT=COMPACT;
SELECT COUNT(*) FROM t1;
COUNT(*)
5000
/* Create index. */
CREATE INDEX idx_id ON t1(id);
CREATE INDEX idx_title ON t1(title);
/* Check table. */
CHECK TABLE t1;
Table	Op	Msg_type	Msg_text
test.t1	check	status	OK
/* Select by index. */
EXPLAIN SELECT * FROM t1 WHERE id = 10;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	ref	idx_id	idx_id	5	const	1	
EXPLAIN SELECT * FROM t1 WHERE title = 'a10';
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	ref	idx_title	idx_title	103	const	1	Using index condition
SELECT * FROM t1 WHERE id = 10;
class	id	title
10	10	a10
SELECT * FROM t1 WHERE title = 'a10';
class	id	title
10	10	a10
SELECT * FROM t1 WHERE id = 5000;
class	id	title
5000	5000	a5000
SELECT * FROM t1 WHERE title = 'a5000';
class	id	title
5000	5000	a5000
SELECT * FROM t1 WHERE id = 10000;
class	id	title
10000	10000	a10000
SELECT * FROM t1 WHERE title = 'a10000';
class	id	title
10000	10000	a10000
SELECT * FROM t1 WHERE id = 10010;
class	id	title
SELECT * FROM t1 WHERE title = 'a10010';
class	id	title
/*Insert/Update/Delete. */
DELETE FROM t1 WHERE id < 4010 AND id > 3990;
INSERT INTO t1 VALUES(4000, 4000, 'b4000');
UPDATE t1 SET title = CONCAT('b', id) WHERE id < 3010 AND id > 2990;
SELECT * FROM t1 WHERE id = 3000;
class	id	title
3000	3000	b3000
SELECT * FROM t1 WHERE title = 'a3000';
class	id	title
SELECT * FROM t1 WHERE title = 'b3000';
class	id	title
3000	3000	b3000
SELECT * FROM t1 WHERE id = 4000;
class	id	title
4000	4000	b4000
SELECT * FROM t1 WHERE title = 'a4000';
class	id	title
SELECT * FROM t1 WHERE title = 'b4000';
class	id	title
4000	4000	b4000
SELECT * FROM t1 WHERE id = 4001;
class	id	title
SELECT * FROM t1 WHERE title = 'a4001';
class	id	title
SELECT COUNT(*) FROM t1;
COUNT(*)
9992
/* Add column. */
ALTER TABLE t1 ADD COLUMN content TEXT;
CHECK TABLE t1;
Table	Op	Msg_type	Msg_text
test.t1	check	status	OK
SELECT * FROM t1 WHERE id = 10;
class	id	title	content
10	10	a10	NULL
SELECT * FROM t1 WHERE title = 'a10';
class	id	title	content
10	10	a10	NULL
SELECT * FROM t1 WHERE id = 5000;
class	id	title	content
5000	5000	a5000	NULL
SELECT * FROM t1 WHERE title = 'a5000';
class	id	title	content
5000	5000	a5000	NULL
SELECT * FROM t1 WHERE id = 10000;
class	id	title	content
10000	10000	a10000	NULL
SELECT * FROM t1 WHERE title = 'a10000';
class	id	title	content
10000	10000	a10000	NULL
SELECT * FROM t1 WHERE id = 10010;
class	id	title	content
SELECT * FROM t1 WHERE title = 'a10010';
class	id	title	content
/* Drop column. */
ALTER TABLE t1 DROP COLUMN content;
CHECK TABLE t1;
Table	Op	Msg_type	Msg_text
test.t1	check	status	OK
SELECT * FROM t1 WHERE id = 10;
class	id	title
10	10	a10
SELECT * FROM t1 WHERE title = 'a10';
class	id	title
10	10	a10
SELECT * FROM t1 WHERE id = 5000;
class	id	title
5000	5000	a5000
SELECT * FROM t1 WHERE title = 'a5000';
class	id	title
5000	5000	a5000
SELECT * FROM t1 WHERE id = 10000;
class	id	title
10000	10000	a10000
SELECT * FROM t1 WHERE title = 'a10000';
class	id	title
10000	10000	a10000
SELECT * FROM t1 WHERE id = 10010;
class	id	title
SELECT * FROM t1 WHERE title = 'a10010';
class	id	title
DROP TABLE t1;
CREATE TABLE t1(
a INT PRIMARY KEY,
b TEXT,
c TEXT) ENGINE=InnoDB ROW_FORMAT=COMPACT;
ALTER TABLE t1 ADD INDEX `idx` (a,b(5));
SELECT CHAR_LENGTH(b) FROM t1 WHERE a=4975;
CHAR_LENGTH(b)
10000
SELECT b=REPEAT(CONCAT('a',4975),2000) FROM t1 WHERE a=4975 AND b like 'a4975%';
b=REPEAT(CONCAT('a',4975),2000)
1
UPDATE t1 SET b = REPEAT(CONCAT('b',4975),2000) WHERE a=4975 AND b like 'a4975%';
SELECT b=REPEAT(CONCAT('a',4975),2000) FROM t1 WHERE a=4975 AND b like 'a4975%';
b=REPEAT(CONCAT('a',4975),2000)
SELECT b=REPEAT(CONCAT('b',4975),2000) FROM t1 WHERE a=4975 AND b like 'b4975%';
b=REPEAT(CONCAT('b',4975),2000)
1
DELETE FROM t1 WHERE a=4975 AND b like 'b4975%';
SELECT b=REPEAT(CONCAT('b',4975),2000) FROM t1 WHERE a=4975 AND b like 'b4975%';
b=REPEAT(CONCAT('b',4975),2000)
ALTER TABLE t1 DROP COLUMN c;
CHECK TABLE t1;
Table	Op	Msg_type	Msg_text
test.t1	check	status	OK
SELECT CHAR_LENGTH(b) FROM t1 WHERE a=4975;
CHAR_LENGTH(b)
DROP TABLE t1;
DROP PROCEDURE populate_t1;
CREATE PROCEDURE populate_t1(load_even INT)
BEGIN
DECLARE i int DEFAULT 1;
START TRANSACTION;
WHILE (i <= 10000) DO
IF i%2 = 0 AND load_even = 1 THEN
INSERT INTO t1 VALUES (i, i, CONCAT('a', i));
END IF;
IF i%2 != 0 AND load_even != 1 THEN
INSERT INTO t1 VALUES (i, i, CONCAT('a', i));
END IF;
SET i = i + 1;
END WHILE;
COMMIT;
END|
SELECT @@innodb_fill_factor;
@@innodb_fill_factor
100
CREATE TABLE t1(
class	INT,
id	INT,
title	VARCHAR(100)
) ENGINE=InnoDB ROW_FORMAT=DYNAMIC;
SELECT COUNT(*) FROM t1;
COUNT(*)
5000
/* Create index. */
CREATE INDEX idx_id ON t1(id);
CREATE INDEX idx_title ON t1(title);
/* Check table. */
CHECK TABLE t1;
Table	Op	Msg_type	Msg_text
test.t1	check	status	OK
/* Select by index. */
EXPLAIN SELECT * FROM t1 WHERE id = 10;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	ref	idx_id	idx_id	5	const	1	
EXPLAIN SELECT * FROM t1 WHERE title = 'a10';
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	ref	idx_title	idx_title	103	const	1	Using index condition
SELECT * FROM t1 WHERE id = 10;
class	id	title
10	10	a10
SELECT * FROM t1 WHERE title = 'a10';
class	id	title
10	10	a10
SELECT * FROM t1 WHERE id = 5000;
class	id	title
5000	5000	a5000
SELECT * FROM t1 WHERE title = 'a5000';
class	id	title
5000	5000	a5000
SELECT * FROM t1 WHERE id = 10000;
class	id	title
10000	10000	a10000
SELECT * FROM t1 WHERE title = 'a10000';
class	id	title
10000	10000	a10000
SELECT * FROM t1 WHERE id = 10010;
class	id	title
SELECT * FROM t1 WHERE title = 'a10010';
class	id	title
/*Insert/Update/Delete. */
DELETE FROM t1 WHERE id < 4010 AND id > 3990;
INSERT INTO t1 VALUES(4000, 4000, 'b4000');
UPDATE t1 SET title = CONCAT('b', id) WHERE id < 3010 AND id > 2990;
SELECT * FROM t1 WHERE id = 3000;
class	id	title
3000	3000	b3000
SELECT * FROM t1 WHERE title = 'a3000';
class	id	title
SELECT * FROM t1 WHERE title = 'b3000';
class	id	title
3000	3000	b3000
SELECT * FROM t1 WHERE id = 4000;
class	id	title
4000	4000	b4000
SELECT * FROM t1 WHERE title = 'a4000';
class	id	title
SELECT * FROM t1 WHERE title = 'b4000';
class	id	title
4000	4000	b4000
SELECT * FROM t1 WHERE id = 4001;
class	id	title
SELECT * FROM t1 WHERE title = 'a4001';
class	id	title
SELECT COUNT(*) FROM t1;
COUNT(*)
9992
/* Add column. */
ALTER TABLE t1 ADD COLUMN content TEXT;
CHECK TABLE t1;
Table	Op	Msg_type	Msg_text
test.t1	check	status	OK
SELECT * FROM t1 WHERE id = 10;
class	id	title	content
10	10	a10	NULL
SELECT * FROM t1 WHERE title = 'a10';
class	id	title	content
10	10	a10	NULL
SELECT * FROM t1 WHERE id = 5000;
class	id	title	content
5000	5000	a5000	NULL
SELECT * FROM t1 WHERE title = 'a5000';
class	id	title	content
5000	5000	a5000	NULL
SELECT * FROM t1 WHERE id = 10000;
class	id	title	content
10000	10000	a10000	NULL
SELECT * FROM t1 WHERE title = 'a10000';
class	id	title	content
10000	10000	a10000	NULL
SELECT * FROM t1 WHERE id = 10010;
class	id	title	content
SELECT * FROM t1 WHERE title = 'a10010';
class	id	title	content
/* Drop column. */
ALTER TABLE t1 DROP COLUMN content;
CHECK TABLE t1;
Table	Op	Msg_type	Msg_text
test.t1	check	status	OK
SELECT * FROM t1 WHERE id = 10;
class	id	title
10	10	a10
SELECT * FROM t1 WHERE title = 'a10';
class	id	title
10	10	a10
SELECT * FROM t1 WHERE id = 5000;
class	id	title
5000	5000	a5000
SELECT * FROM t1 WHERE title = 'a5000';
class	id	title
5000	5000	a5000
SELECT * FROM t1 WHERE id = 10000;
class	id	title
10000	10000	a10000
SELECT * FROM t1 WHERE title = 'a10000';
class	id	title
10000	10000	a10000
SELECT * FROM t1 WHERE id = 10010;
class	id	title
SELECT * FROM t1 WHERE title = 'a10010';
class	id	title
DROP TABLE t1;
CREATE TABLE t1(
a INT PRIMARY KEY,
b TEXT,
c TEXT) ENGINE=InnoDB ROW_FORMAT=DYNAMIC;
ALTER TABLE t1 ADD INDEX `idx` (a,b(5));
SELECT CHAR_LENGTH(b) FROM t1 WHERE a=4975;
CHAR_LENGTH(b)
10000
SELECT b=REPEAT(CONCAT('a',4975),2000) FROM t1 WHERE a=4975 AND b like 'a4975%';
b=REPEAT(CONCAT('a',4975),2000)
1
UPDATE t1 SET b = REPEAT(CONCAT('b',4975),2000) WHERE a=4975 AND b like 'a4975%';
SELECT b=REPEAT(CONCAT('a',4975),2000) FROM t1 WHERE a=4975 AND b like 'a4975%';
b=REPEAT(CONCAT('a',4975),2000)
SELECT b=REPEAT(CONCAT('b',4975),2000) FROM t1 WHERE a=4975 AND b like 'b4975%';
b=REPEAT(CONCAT('b',4975),2000)
1
DELETE FROM t1 WHERE a=4975 AND b like 'b4975%';
SELECT b=REPEAT(CONCAT('b',4975),2000) FROM t1 WHERE a=4975 AND b like 'b4975%';
b=REPEAT(CONCAT('b',4975),2000)
ALTER TABLE t1 DROP COLUMN c;
CHECK TABLE t1;
Table	Op	Msg_type	Msg_text
test.t1	check	status	OK
SELECT CHAR_LENGTH(b) FROM t1 WHERE a=4975;
CHAR_LENGTH(b)
DROP TABLE t1;
DROP PROCEDURE populate_t1;
CREATE PROCEDURE populate_t1(load_even INT)
BEGIN
DECLARE i int DEFAULT 1;
START TRANSACTION;
WHILE (i <= 10000) DO
IF i%2 = 0 AND load_even = 1 THEN
INSERT INTO t1 VALUES (i, i, CONCAT('a', i));
END IF;
IF i%2 != 0 AND load_even != 1 THEN
INSERT INTO t1 VALUES (i, i, CONCAT('a', i));
END IF;
SET i = i + 1;
END WHILE;
COMMIT;
END|
SELECT @@innodb_fill_factor;
@@innodb_fill_factor
100
SET GLOBAL innodb_file_per_table=1;
CREATE TABLE t1(
class	INT,
id	INT,
title	VARCHAR(100)
) ENGINE=InnoDB ROW_FORMAT=COMPRESSED KEY_BLOCK_SIZE=4;
SELECT COUNT(*) FROM t1;
COUNT(*)
5000
/* Create index. */
CREATE INDEX idx_id ON t1(id);
CREATE INDEX idx_title ON t1(title);
/* Check table. */
CHECK TABLE t1;
Table	Op	Msg_type	Msg_text
test.t1	check	status	OK
/* Select by index. */
EXPLAIN SELECT * FROM t1 WHERE id = 10;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	ref	idx_id	idx_id	5	const	1	
EXPLAIN SELECT * FROM t1 WHERE title = 'a10';
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	ref	idx_title	idx_title	103	const	1	Using index condition
SELECT * FROM t1 WHERE id = 10;
class	id	title
10	10	a10
SELECT * FROM t1 WHERE title = 'a10';
class	id	title
10	10	a10
SELECT * FROM t1 WHERE id = 5000;
class	id	title
5000	5000	a5000
SELECT * FROM t1 WHERE title = 'a5000';
class	id	title
5000	5000	a5000
SELECT * FROM t1 WHERE id = 10000;
class	id	title
10000	10000	a10000
SELECT * FROM t1 WHERE title = 'a10000';
class	id	title
10000	10000	a10000
SELECT * FROM t1 WHERE id = 10010;
class	id	title
SELECT * FROM t1 WHERE title = 'a10010';
class	id	title
/*Insert/Update/Delete. */
DELETE FROM t1 WHERE id < 4010 AND id > 3990;
INSERT INTO t1 VALUES(4000, 4000, 'b4000');
UPDATE t1 SET title = CONCAT('b', id) WHERE id < 3010 AND id > 2990;
SELECT * FROM t1 WHERE id = 3000;
class	id	title
3000	3000	b3000
SELECT * FROM t1 WHERE title = 'a3000';
class	id	title
SELECT * FROM t1 WHERE title = 'b3000';
class	id	title
3000	3000	b3000
SELECT * FROM t1 WHERE id = 4000;
class	id	title
4000	4000	b4000
SELECT * FROM t1 WHERE title = 'a4000';
class	id	title
SELECT * FROM t1 WHERE title = 'b4000';
class	id	title
4000	4000	b4000
SELECT * FROM t1 WHERE id = 4001;
class	id	title
SELECT * FROM t1 WHERE title = 'a4001';
class	id	title
SELECT COUNT(*) FROM t1;
COUNT(*)
9992
/* Add column. */
ALTER TABLE t1 ADD COLUMN content TEXT;
CHECK TABLE t1;
Table	Op	Msg_type	Msg_text
test.t1	check	status	OK
SELECT * FROM t1 WHERE id = 10;
class	id	title	content
10	10	a10	NULL
SELECT * FROM t1 WHERE title = 'a10';
class	id	title	content
10	10	a10	NULL
SELECT * FROM t1 WHERE id = 5000;
class	id	title	content
5000	5000	a5000	NULL
SELECT * FROM t1 WHERE title = 'a5000';
class	id	title	content
5000	5000	a5000	NULL
SELECT * FROM t1 WHERE id = 10000;
class	id	title	content
10000	10000	a10000	NULL
SELECT * FROM t1 WHERE title = 'a10000';
class	id	title	content
10000	10000	a10000	NULL
SELECT * FROM t1 WHERE id = 10010;
class	id	title	content
SELECT * FROM t1 WHERE title = 'a10010';
class	id	title	content
/* Drop column. */
ALTER TABLE t1 DROP COLUMN content;
CHECK TABLE t1;
Table	Op	Msg_type	Msg_text
test.t1	check	status	OK
SELECT * FROM t1 WHERE id = 10;
class	id	title
10	10	a10
SELECT * FROM t1 WHERE title = 'a10';
class	id	title
10	10	a10
SELECT * FROM t1 WHERE id = 5000;
class	id	title
5000	5000	a5000
SELECT * FROM t1 WHERE title = 'a5000';
class	id	title
5000	5000	a5000
SELECT * FROM t1 WHERE id = 10000;
class	id	title
10000	10000	a10000
SELECT * FROM t1 WHERE title = 'a10000';
class	id	title
10000	10000	a10000
SELECT * FROM t1 WHERE id = 10010;
class	id	title
SELECT * FROM t1 WHERE title = 'a10010';
class	id	title
DROP TABLE t1;
CREATE TABLE t1(
a INT PRIMARY KEY,
b BLOB,
c TEXT) ENGINE=InnoDB ROW_FORMAT=COMPRESSED KEY_BLOCK_SIZE=4;
ALTER TABLE t1 ADD INDEX `idx` (a,b(5));
SELECT CHAR_LENGTH(b) FROM t1 WHERE a=4975;
CHAR_LENGTH(b)
10000
SELECT b=REPEAT(CONCAT('a',4975),2000) FROM t1 WHERE a=4975 AND b like 'a4975%';
b=REPEAT(CONCAT('a',4975),2000)
1
UPDATE t1 SET b = REPEAT(CONCAT('b',4975),2000) WHERE a=4975 AND b like 'a4975%';
SELECT b=REPEAT(CONCAT('a',4975),2000) FROM t1 WHERE a=4975 AND b like 'a4975%';
b=REPEAT(CONCAT('a',4975),2000)
SELECT b=REPEAT(CONCAT('b',4975),2000) FROM t1 WHERE a=4975 AND b like 'b4975%';
b=REPEAT(CONCAT('b',4975),2000)
1
DELETE FROM t1 WHERE a=4975 AND b like 'b4975%';
SELECT b=REPEAT(CONCAT('b',4975),2000) FROM t1 WHERE a=4975 AND b like 'b4975%';
b=REPEAT(CONCAT('b',4975),2000)
ALTER TABLE t1 DROP COLUMN c;
CHECK TABLE t1;
Table	Op	Msg_type	Msg_text
test.t1	check	status	OK
SELECT CHAR_LENGTH(b) FROM t1 WHERE a=4975;
CHAR_LENGTH(b)
DROP TABLE t1;
SET GLOBAL innodb_file_per_table=default;
DROP PROCEDURE populate_t1;
SET GLOBAL innodb_fill_factor=10;
CREATE PROCEDURE populate_t1(load_even INT)
BEGIN
DECLARE i int DEFAULT 1;
START TRANSACTION;
WHILE (i <= 10000) DO
IF i%2 = 0 AND load_even = 1 THEN
INSERT INTO t1 VALUES (i, i, CONCAT('a', i));
END IF;
IF i%2 != 0 AND load_even != 1 THEN
INSERT INTO t1 VALUES (i, i, CONCAT('a', i));
END IF;
SET i = i + 1;
END WHILE;
COMMIT;
END|
SELECT @@innodb_fill_factor;
@@innodb_fill_factor
10
CREATE TABLE t1(
class	INT,
id	INT,
title	VARCHAR(100)
) ENGINE=InnoDB ROW_FORMAT=COMPACT;
SELECT COUNT(*) FROM t1;
COUNT(*)
5000
/* Create index. */
CREATE INDEX idx_id ON t1(id);
CREATE INDEX idx_title ON t1(title);
/* Check table. */
CHECK TABLE t1;
Table	Op	Msg_type	Msg_text
test.t1	check	status	OK
/* Select by index. */
EXPLAIN SELECT * FROM t1 WHERE id = 10;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	ref	idx_id	idx_id	5	const	1	
EXPLAIN SELECT * FROM t1 WHERE title = 'a10';
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	ref	idx_title	idx_title	103	const	1	Using index condition
SELECT * FROM t1 WHERE id = 10;
class	id	title
10	10	a10
SELECT * FROM t1 WHERE title = 'a10';
class	id	title
10	10	a10
SELECT * FROM t1 WHERE id = 5000;
class	id	title
5000	5000	a5000
SELECT * FROM t1 WHERE title = 'a5000';
class	id	title
5000	5000	a5000
SELECT * FROM t1 WHERE id = 10000;
class	id	title
10000	10000	a10000
SELECT * FROM t1 WHERE title = 'a10000';
class	id	title
10000	10000	a10000
SELECT * FROM t1 WHERE id = 10010;
class	id	title
SELECT * FROM t1 WHERE title = 'a10010';
class	id	title
/*Insert/Update/Delete. */
DELETE FROM t1 WHERE id < 4010 AND id > 3990;
INSERT INTO t1 VALUES(4000, 4000, 'b4000');
UPDATE t1 SET title = CONCAT('b', id) WHERE id < 3010 AND id > 2990;
SELECT * FROM t1 WHERE id = 3000;
class	id	title
3000	3000	b3000
SELECT * FROM t1 WHERE title = 'a3000';
class	id	title
SELECT * FROM t1 WHERE title = 'b3000';
class	id	title
3000	3000	b3000
SELECT * FROM t1 WHERE id = 4000;
class	id	title
4000	4000	b4000
SELECT * FROM t1 WHERE title = 'a4000';
class	id	title
SELECT * FROM t1 WHERE title = 'b4000';
class	id	title
4000	4000	b4000
SELECT * FROM t1 WHERE id = 4001;
class	id	title
SELECT * FROM t1 WHERE title = 'a4001';
class	id	title
SELECT COUNT(*) FROM t1;
COUNT(*)
9992
/* Add column. */
ALTER TABLE t1 ADD COLUMN content TEXT;
CHECK TABLE t1;
Table	Op	Msg_type	Msg_text
test.t1	check	status	OK
SELECT * FROM t1 WHERE id = 10;
class	id	title	content
10	10	a10	NULL
SELECT * FROM t1 WHERE title = 'a10';
class	id	title	content
10	10	a10	NULL
SELECT * FROM t1 WHERE id = 5000;
class	id	title	content
5000	5000	a5000	NULL
SELECT * FROM t1 WHERE title = 'a5000';
class	id	title	content
5000	5000	a5000	NULL
SELECT * FROM t1 WHERE id = 10000;
class	id	title	content
10000	10000	a10000	NULL
SELECT * FROM t1 WHERE title = 'a10000';
class	id	title	content
10000	10000	a10000	NULL
SELECT * FROM t1 WHERE id = 10010;
class	id	title	content
SELECT * FROM t1 WHERE title = 'a10010';
class	id	title	content
/* Drop column. */
ALTER TABLE t1 DROP COLUMN content;
CHECK TABLE t1;
Table	Op	Msg_type	Msg_text
test.t1	check	status	OK
SELECT * FROM t1 WHERE id = 10;
class	id	title
10	10	a10
SELECT * FROM t1 WHERE title = 'a10';
class	id	title
10	10	a10
SELECT * FROM t1 WHERE id = 5000;
class	id	title
5000	5000	a5000
SELECT * FROM t1 WHERE title = 'a5000';
class	id	title
5000	5000	a5000
SELECT * FROM t1 WHERE id = 10000;
class	id	title
10000	10000	a10000
SELECT * FROM t1 WHERE title = 'a10000';
class	id	title
10000	10000	a10000
SELECT * FROM t1 WHERE id = 10010;
class	id	title
SELECT * FROM t1 WHERE title = 'a10010';
class	id	title
DROP TABLE t1;
CREATE TABLE t1(
a INT PRIMARY KEY,
b TEXT,
c TEXT) ENGINE=InnoDB ROW_FORMAT=COMPACT;
ALTER TABLE t1 ADD INDEX `idx` (a,b(5));
SELECT CHAR_LENGTH(b) FROM t1 WHERE a=4975;
CHAR_LENGTH(b)
10000
SELECT b=REPEAT(CONCAT('a',4975),2000) FROM t1 WHERE a=4975 AND b like 'a4975%';
b=REPEAT(CONCAT('a',4975),2000)
1
UPDATE t1 SET b = REPEAT(CONCAT('b',4975),2000) WHERE a=4975 AND b like 'a4975%';
SELECT b=REPEAT(CONCAT('a',4975),2000) FROM t1 WHERE a=4975 AND b like 'a4975%';
b=REPEAT(CONCAT('a',4975),2000)
SELECT b=REPEAT(CONCAT('b',4975),2000) FROM t1 WHERE a=4975 AND b like 'b4975%';
b=REPEAT(CONCAT('b',4975),2000)
1
DELETE FROM t1 WHERE a=4975 AND b like 'b4975%';
SELECT b=REPEAT(CONCAT('b',4975),2000) FROM t1 WHERE a=4975 AND b like 'b4975%';
b=REPEAT(CONCAT('b',4975),2000)
ALTER TABLE t1 DROP COLUMN c;
CHECK TABLE t1;
Table	Op	Msg_type	Msg_text
test.t1	check	status	OK
SELECT CHAR_LENGTH(b) FROM t1 WHERE a=4975;
CHAR_LENGTH(b)
DROP TABLE t1;
DROP PROCEDURE populate_t1;
SET GLOBAL innodb_fill_factor=50;
CREATE PROCEDURE populate_t1(load_even INT)
BEGIN
DECLARE i int DEFAULT 1;
START TRANSACTION;
WHILE (i <= 10000) DO
IF i%2 = 0 AND load_even = 1 THEN
INSERT INTO t1 VALUES (i, i, CONCAT('a', i));
END IF;
IF i%2 != 0 AND load_even != 1 THEN
INSERT INTO t1 VALUES (i, i, CONCAT('a', i));
END IF;
SET i = i + 1;
END WHILE;
COMMIT;
END|
SELECT @@innodb_fill_factor;
@@innodb_fill_factor
50
CREATE TABLE t1(
class	INT,
id	INT,
title	VARCHAR(100)
) ENGINE=InnoDB ROW_FORMAT=COMPACT;
SELECT COUNT(*) FROM t1;
COUNT(*)
5000
/* Create index. */
CREATE INDEX idx_id ON t1(id);
CREATE INDEX idx_title ON t1(title);
/* Check table. */
CHECK TABLE t1;
Table	Op	Msg_type	Msg_text
test.t1	check	status	OK
/* Select by index. */
EXPLAIN SELECT * FROM t1 WHERE id = 10;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	ref	idx_id	idx_id	5	const	1	
EXPLAIN SELECT * FROM t1 WHERE title = 'a10';
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	ref	idx_title	idx_title	103	const	1	Using index condition
SELECT * FROM t1 WHERE id = 10;
class	id	title
10	10	a10
SELECT * FROM t1 WHERE title = 'a10';
class	id	title
10	10	a10
SELECT * FROM t1 WHERE id = 5000;
class	id	title
5000	5000	a5000
SELECT * FROM t1 WHERE title = 'a5000';
class	id	title
5000	5000	a5000
SELECT * FROM t1 WHERE id = 10000;
class	id	title
10000	10000	a10000
SELECT * FROM t1 WHERE title = 'a10000';
class	id	title
10000	10000	a10000
SELECT * FROM t1 WHERE id = 10010;
class	id	title
SELECT * FROM t1 WHERE title = 'a10010';
class	id	title
/*Insert/Update/Delete. */
DELETE FROM t1 WHERE id < 4010 AND id > 3990;
INSERT INTO t1 VALUES(4000, 4000, 'b4000');
UPDATE t1 SET title = CONCAT('b', id) WHERE id < 3010 AND id > 2990;
SELECT * FROM t1 WHERE id = 3000;
class	id	title
3000	3000	b3000
SELECT * FROM t1 WHERE title = 'a3000';
class	id	title
SELECT * FROM t1 WHERE title = 'b3000';
class	id	title
3000	3000	b3000
SELECT * FROM t1 WHERE id = 4000;
class	id	title
4000	4000	b4000
SELECT * FROM t1 WHERE title = 'a4000';
class	id	title
SELECT * FROM t1 WHERE title = 'b4000';
class	id	title
4000	4000	b4000
SELECT * FROM t1 WHERE id = 4001;
class	id	title
SELECT * FROM t1 WHERE title = 'a4001';
class	id	title
SELECT COUNT(*) FROM t1;
COUNT(*)
9992
/* Add column. */
ALTER TABLE t1 ADD COLUMN content TEXT;
CHECK TABLE t1;
Table	Op	Msg_type	Msg_text
test.t1	check	status	OK
SELECT * FROM t1 WHERE id = 10;
class	id	title	content
10	10	a10	NULL
SELECT * FROM t1 WHERE title = 'a10';
class	id	title	content
10	10	a10	NULL
SELECT * FROM t1 WHERE id = 5000;
class	id	title	content
5000	5000	a5000	NULL
SELECT * FROM t1 WHERE title = 'a5000';
class	id	title	content
5000	5000	a5000	NULL
SELECT * FROM t1 WHERE id = 10000;
class	id	title	content
10000	10000	a10000	NULL
SELECT * FROM t1 WHERE title = 'a10000';
class	id	title	content
10000	10000	a10000	NULL
SELECT * FROM t1 WHERE id = 10010;
class	id	title	content
SELECT * FROM t1 WHERE title = 'a10010';
class	id	title	content
/* Drop column. */
ALTER TABLE t1 DROP COLUMN content;
CHECK TABLE t1;
Table	Op	Msg_type	Msg_text
test.t1	check	status	OK
SELECT * FROM t1 WHERE id = 10;
class	id	title
10	10	a10
SELECT * FROM t1 WHERE title = 'a10';
class	id	title
10	10	a10
SELECT * FROM t1 WHERE id = 5000;
class	id	title
5000	5000	a5000
SELECT * FROM t1 WHERE title = 'a5000';
class	id	title
5000	5000	a5000
SELECT * FROM t1 WHERE id = 10000;
class	id	title
10000	10000	a10000
SELECT * FROM t1 WHERE title = 'a10000';
class	id	title
10000	10000	a10000
SELECT * FROM t1 WHERE id = 10010;
class	id	title
SELECT * FROM t1 WHERE title = 'a10010';
class	id	title
DROP TABLE t1;
CREATE TABLE t1(
a INT PRIMARY KEY,
b TEXT,
c TEXT) ENGINE=InnoDB ROW_FORMAT=COMPACT;
ALTER TABLE t1 ADD INDEX `idx` (a,b(5));
SELECT CHAR_LENGTH(b) FROM t1 WHERE a=4975;
CHAR_LENGTH(b)
10000
SELECT b=REPEAT(CONCAT('a',4975),2000) FROM t1 WHERE a=4975 AND b like 'a4975%';
b=REPEAT(CONCAT('a',4975),2000)
1
UPDATE t1 SET b = REPEAT(CONCAT('b',4975),2000) WHERE a=4975 AND b like 'a4975%';
SELECT b=REPEAT(CONCAT('a',4975),2000) FROM t1 WHERE a=4975 AND b like 'a4975%';
b=REPEAT(CONCAT('a',4975),2000)
SELECT b=REPEAT(CONCAT('b',4975),2000) FROM t1 WHERE a=4975 AND b like 'b4975%';
b=REPEAT(CONCAT('b',4975),2000)
1
DELETE FROM t1 WHERE a=4975 AND b like 'b4975%';
SELECT b=REPEAT(CONCAT('b',4975),2000) FROM t1 WHERE a=4975 AND b like 'b4975%';
b=REPEAT(CONCAT('b',4975),2000)
ALTER TABLE t1 DROP COLUMN c;
CHECK TABLE t1;
Table	Op	Msg_type	Msg_text
test.t1	check	status	OK
SELECT CHAR_LENGTH(b) FROM t1 WHERE a=4975;
CHAR_LENGTH(b)
DROP TABLE t1;
DROP PROCEDURE populate_t1;
SET GLOBAL innodb_fill_factor=default;