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mariadb/mysql-test/suite/innodb/r/innodb_bulk_create_index.result
Marko Mäkelä e581396b7a MDEV-29983 Deprecate innodb_file_per_table 
Before commit 6112853cda in MySQL 4.1.1
introduced the parameter innodb_file_per_table, all InnoDB data was
written to the InnoDB system tablespace (often named ibdata1).
A serious design problem is that once the system tablespace has grown to
some size, it cannot shrink even if the data inside it has been deleted.

There are also other design problems, such as the server hang MDEV-29930
that should only be possible when using innodb_file_per_table=0 and
innodb_undo_tablespaces=0 (storing both tables and undo logs in the
InnoDB system tablespace).

The parameter innodb_change_buffering was deprecated
in commit b5852ffbee.
Starting with commit baf276e6d4
(MDEV-19229) the number of innodb_undo_tablespaces can be increased,
so that the undo logs can be moved out of the system tablespace
of an existing installation.

If all these things (tables, undo logs, and the change buffer) are
removed from the InnoDB system tablespace, the only variable-size
data structure inside it is the InnoDB data dictionary.

DDL operations on .ibd files was optimized in
commit 86dc7b4d4c (MDEV-24626).
That should have removed any thinkable performance advantage of
using innodb_file_per_table=0.

Since there should be no benefit of setting innodb_file_per_table=0,
the parameter should be deprecated. Starting with MySQL 5.6 and
MariaDB Server 10.0, the default value is innodb_file_per_table=1.
2023-01-11 17:55:56 +02:00

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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
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;
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;
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