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|
set @start_read_only= @@global.read_only;
set @start_autocommit= @@global.autocommit;
set default_storage_engine= innodb;
set @@global.autocommit= 0;
CREATE USER test@localhost;
grant CREATE, SELECT, UPDATE, INSERT on *.* to test@localhost;
CREATE USER test2@localhost;
grant CREATE, SELECT, UPDATE on *.* to test2@localhost;
CREATE TABLE t1 (
a char(2) NOT NULL,
b char(2) NOT NULL,
c int(10) unsigned NOT NULL,
d varchar(255) DEFAULT NULL,
e varchar(1000) DEFAULT NULL,
PRIMARY KEY (a, b, c),
KEY (a),
KEY (a, b)
) charset latin1 PARTITION BY KEY (a) PARTITIONS 20;
INSERT INTO t1 (a, b, c, d, e) VALUES
('07', '03', 343, '1', '07_03_343'),
('01', '04', 343, '2', '01_04_343'),
('01', '06', 343, '3', '01_06_343'),
('01', '07', 343, '4', '01_07_343'),
('01', '08', 343, '5', '01_08_343'),
('01', '09', 343, '6', '01_09_343'),
('03', '03', 343, '7', '03_03_343'),
('03', '06', 343, '8', '03_06_343'),
('03', '07', 343, '9', '03_07_343'),
('04', '03', 343, '10', '04_03_343'),
('04', '06', 343, '11', '04_06_343'),
('05', '03', 343, '12', '05_03_343'),
('11', '03', 343, '13', '11_03_343'),
('11', '04', 343, '14', '11_04_343')
;
CREATE TABLE t2 (a int, name VARCHAR(50), purchased DATE)
PARTITION BY RANGE (a)
(PARTITION p0 VALUES LESS THAN (3),
PARTITION p1 VALUES LESS THAN (7),
PARTITION p2 VALUES LESS THAN (9),
PARTITION p3 VALUES LESS THAN (11));
INSERT INTO t2 VALUES
(1, 'desk organiser', '2003-10-15'),
(2, 'CD player', '1993-11-05'),
(3, 'TV set', '1996-03-10'),
(4, 'bookcase', '1982-01-10'),
(5, 'exercise bike', '2004-05-09'),
(6, 'sofa', '1987-06-05'),
(7, 'popcorn maker', '2001-11-22'),
(8, 'acquarium', '1992-08-04'),
(9, 'study desk', '1984-09-16'),
(10, 'lava lamp', '1998-12-25');
CREATE TABLE t3 SELECT * FROM t1;
ALTER TABLE t3 ADD PRIMARY KEY (d);
ALTER TABLE t3 ADD KEY (a);
ALTER TABLE t3 ADD KEY (a, b);
ANALYZE TABLE t3;
Table Op Msg_type Msg_text
test.t3 analyze status Engine-independent statistics collected
test.t3 analyze status OK
########################################################################
connect con1,localhost,test,,test;
BEGIN;
SELECT d,a,b,c FROM t1 partition (p0);
d a b c
SELECT d,a,b,c FROM t1 partition (p1);
d a b c
7 03 03 343
8 03 06 343
9 03 07 343
SELECT d,a,b,c FROM t1 partition (p2);
d a b c
SELECT d,a,b,c FROM t1 partition (p3);
d a b c
SELECT d,a,b,c FROM t1 partition (p4);
d a b c
SELECT d,a,b,c FROM t1 partition (p5);
d a b c
SELECT d,a,b,c FROM t1 partition (p6);
d a b c
SELECT d,a,b,c FROM t1 partition (p7);
d a b c
SELECT d,a,b,c FROM t1 partition (p8);
d a b c
SELECT d,a,b,c FROM t1 partition (p9);
d a b c
2 01 04 343
3 01 06 343
4 01 07 343
5 01 08 343
6 01 09 343
10 04 03 343
11 04 06 343
12 05 03 343
SELECT d,a,b,c FROM t1 partition (p10);
d a b c
SELECT d,a,b,c FROM t1 partition (p11);
d a b c
13 11 03 343
14 11 04 343
SELECT d,a,b,c FROM t1 partition (p12);
d a b c
SELECT d,a,b,c FROM t1 partition (p13);
d a b c
SELECT d,a,b,c FROM t1 partition (p14);
d a b c
SELECT d,a,b,c FROM t1 partition (p15);
d a b c
SELECT d,a,b,c FROM t1 partition (p16);
d a b c
SELECT d,a,b,c FROM t1 partition (p17);
d a b c
1 07 03 343
SELECT d,a,b,c FROM t1 partition (p18);
d a b c
SELECT d,a,b,c FROM t1 partition (p19);
d a b c
SELECT * FROM t1 WHERE a='01' FOR UPDATE ;
a b c d e
01 04 343 2 01_04_343
01 06 343 3 01_06_343
01 07 343 4 01_07_343
01 08 343 5 01_08_343
01 09 343 6 01_09_343
SELECT * FROM t3 FORCE INDEX(a) WHERE a='01' FOR UPDATE ;
a b c d e
01 04 343 2 01_04_343
01 06 343 3 01_06_343
01 07 343 4 01_07_343
01 08 343 5 01_08_343
01 09 343 6 01_09_343
connect con2,localhost,test,,test;
BEGIN;
SET SESSION innodb_lock_wait_timeout=1;
#
# SHARE ...
SELECT * FROM t1 LOCK IN SHARE MODE;
ERROR HY000: Lock wait timeout exceeded; try restarting transaction
SELECT * FROM t1 LOCK IN SHARE MODE NOWAIT;
ERROR HY000: Lock wait timeout exceeded; try restarting transaction
SELECT * FROM t1 ORDER BY d LOCK IN SHARE MODE SKIP LOCKED;
a b c d e
07 03 343 1 07_03_343
04 03 343 10 04_03_343
04 06 343 11 04_06_343
05 03 343 12 05_03_343
11 03 343 13 11_03_343
11 04 343 14 11_04_343
03 03 343 7 03_03_343
03 06 343 8 03_06_343
03 07 343 9 03_07_343
SELECT a,count(b) FROM t1 force index (a) GROUP BY a ORDER BY a LOCK IN SHARE MODE SKIP LOCKED;
a count(b)
01 5
03 3
04 2
05 1
07 1
11 2
SELECT d,a,b,c FROM t1 partition (p1,p9,p11,p17) ORDER BY d
LOCK IN SHARE MODE SKIP LOCKED;
d a b c
1 07 03 343
10 04 03 343
11 04 06 343
12 05 03 343
13 11 03 343
14 11 04 343
7 03 03 343
8 03 06 343
9 03 07 343
SELECT d,a,b,c FROM t1 ORDER BY d LOCK IN SHARE MODE SKIP LOCKED;
d a b c
1 07 03 343
10 04 03 343
11 04 06 343
12 05 03 343
13 11 03 343
14 11 04 343
7 03 03 343
8 03 06 343
9 03 07 343
ANALYZE TABLE t3;
Table Op Msg_type Msg_text
test.t3 analyze status Engine-independent statistics collected
test.t3 analyze status OK
SELECT d,a,b,c FROM t3 ORDER BY d LOCK IN SHARE MODE SKIP LOCKED;
d a b c
1 07 03 343
10 04 03 343
11 04 06 343
12 05 03 343
13 11 03 343
14 11 04 343
7 03 03 343
8 03 06 343
9 03 07 343
explain SELECT d,a,b,c FROM t3 ORDER BY d
LOCK IN SHARE MODE SKIP LOCKED;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t3 index NULL PRIMARY 257 NULL 14
#
# UPDATE ...
SELECT * FROM t1 FOR UPDATE;
ERROR HY000: Lock wait timeout exceeded; try restarting transaction
SELECT * FROM t1 FOR UPDATE NOWAIT;
ERROR HY000: Lock wait timeout exceeded; try restarting transaction
SELECT * FROM t1 ORDER BY a FOR UPDATE SKIP LOCKED;
a b c d e
03 03 343 7 03_03_343
03 06 343 8 03_06_343
03 07 343 9 03_07_343
04 03 343 10 04_03_343
04 06 343 11 04_06_343
05 03 343 12 05_03_343
07 03 343 1 07_03_343
11 03 343 13 11_03_343
11 04 343 14 11_04_343
SELECT a,count(b) FROM t1 GROUP BY a ORDER BY a FOR UPDATE SKIP LOCKED;
a count(b)
03 3
04 2
05 1
07 1
11 2
SELECT d,a,b,c FROM t1 partition (p1,p9,p11,p17) ORDER BY d
FOR UPDATE SKIP LOCKED;
d a b c
1 07 03 343
10 04 03 343
11 04 06 343
12 05 03 343
13 11 03 343
14 11 04 343
7 03 03 343
8 03 06 343
9 03 07 343
SELECT d,a,b,c FROM t1 ORDER BY d FOR UPDATE SKIP LOCKED;
d a b c
1 07 03 343
10 04 03 343
11 04 06 343
12 05 03 343
13 11 03 343
14 11 04 343
7 03 03 343
8 03 06 343
9 03 07 343
SELECT d,a,b,c FROM t3 ORDER BY d FOR UPDATE SKIP LOCKED;
d a b c
1 07 03 343
10 04 03 343
11 04 06 343
12 05 03 343
13 11 03 343
14 11 04 343
7 03 03 343
8 03 06 343
9 03 07 343
connection con1;
COMMIT;
connection con1;
BEGIN;
SELECT * FROM t1 WHERE a='01' LOCK IN SHARE MODE ;
a b c d e
01 04 343 2 01_04_343
01 06 343 3 01_06_343
01 07 343 4 01_07_343
01 08 343 5 01_08_343
01 09 343 6 01_09_343
SELECT * FROM t3 FORCE INDEX(a) WHERE a='01' LOCK IN SHARE MODE ;
a b c d e
01 04 343 2 01_04_343
01 06 343 3 01_06_343
01 07 343 4 01_07_343
01 08 343 5 01_08_343
01 09 343 6 01_09_343
connection con2;
BEGIN;
SET SESSION innodb_lock_wait_timeout=1;
#
# SHARE ...
SELECT * FROM t1 LOCK IN SHARE MODE;
a b c d e
03 03 343 7 03_03_343
03 06 343 8 03_06_343
03 07 343 9 03_07_343
01 04 343 2 01_04_343
01 06 343 3 01_06_343
01 07 343 4 01_07_343
01 08 343 5 01_08_343
01 09 343 6 01_09_343
04 03 343 10 04_03_343
04 06 343 11 04_06_343
05 03 343 12 05_03_343
11 03 343 13 11_03_343
11 04 343 14 11_04_343
07 03 343 1 07_03_343
SELECT * FROM t1 LOCK IN SHARE MODE NOWAIT;
a b c d e
03 03 343 7 03_03_343
03 06 343 8 03_06_343
03 07 343 9 03_07_343
01 04 343 2 01_04_343
01 06 343 3 01_06_343
01 07 343 4 01_07_343
01 08 343 5 01_08_343
01 09 343 6 01_09_343
04 03 343 10 04_03_343
04 06 343 11 04_06_343
05 03 343 12 05_03_343
11 03 343 13 11_03_343
11 04 343 14 11_04_343
07 03 343 1 07_03_343
SELECT * FROM t1 ORDER BY d LOCK IN SHARE MODE SKIP LOCKED;
a b c d e
07 03 343 1 07_03_343
04 03 343 10 04_03_343
04 06 343 11 04_06_343
05 03 343 12 05_03_343
11 03 343 13 11_03_343
11 04 343 14 11_04_343
01 04 343 2 01_04_343
01 06 343 3 01_06_343
01 07 343 4 01_07_343
01 08 343 5 01_08_343
01 09 343 6 01_09_343
03 03 343 7 03_03_343
03 06 343 8 03_06_343
03 07 343 9 03_07_343
SELECT a,count(b) FROM t1 GROUP BY a ORDER BY a LOCK IN SHARE MODE SKIP LOCKED;
a count(b)
01 5
03 3
04 2
05 1
07 1
11 2
SELECT d,a,b,c FROM t1 partition (p1,p9,p11,p17) ORDER BY d
LOCK IN SHARE MODE SKIP LOCKED;
d a b c
1 07 03 343
10 04 03 343
11 04 06 343
12 05 03 343
13 11 03 343
14 11 04 343
2 01 04 343
3 01 06 343
4 01 07 343
5 01 08 343
6 01 09 343
7 03 03 343
8 03 06 343
9 03 07 343
SELECT d,a,b,c FROM t1 ORDER BY d LOCK IN SHARE MODE SKIP LOCKED;
d a b c
1 07 03 343
10 04 03 343
11 04 06 343
12 05 03 343
13 11 03 343
14 11 04 343
2 01 04 343
3 01 06 343
4 01 07 343
5 01 08 343
6 01 09 343
7 03 03 343
8 03 06 343
9 03 07 343
ANALYZE TABLE t3;
Table Op Msg_type Msg_text
test.t3 analyze status Engine-independent statistics collected
test.t3 analyze status OK
SELECT d,a,b,c FROM t3 ORDER BY d LOCK IN SHARE MODE SKIP LOCKED;
d a b c
1 07 03 343
10 04 03 343
11 04 06 343
12 05 03 343
13 11 03 343
14 11 04 343
2 01 04 343
3 01 06 343
4 01 07 343
5 01 08 343
6 01 09 343
7 03 03 343
8 03 06 343
9 03 07 343
explain SELECT d,a,b,c FROM t3 ORDER BY d
LOCK IN SHARE MODE SKIP LOCKED;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t3 index NULL PRIMARY 257 NULL 14
#
# UPDATE ...
SELECT * FROM t1 FOR UPDATE;
ERROR HY000: Lock wait timeout exceeded; try restarting transaction
SELECT * FROM t1 FOR UPDATE NOWAIT;
ERROR HY000: Lock wait timeout exceeded; try restarting transaction
SELECT * FROM t1 ORDER BY a FOR UPDATE SKIP LOCKED;
a b c d e
03 03 343 7 03_03_343
03 06 343 8 03_06_343
03 07 343 9 03_07_343
04 03 343 10 04_03_343
04 06 343 11 04_06_343
05 03 343 12 05_03_343
07 03 343 1 07_03_343
11 03 343 13 11_03_343
11 04 343 14 11_04_343
SELECT a,count(b) FROM t1 GROUP BY a ORDER BY a FOR UPDATE SKIP LOCKED;
a count(b)
03 3
04 2
05 1
07 1
11 2
SELECT d,a,b,c FROM t1 partition (p1,p9,p11,p17) ORDER BY d
FOR UPDATE SKIP LOCKED;
d a b c
1 07 03 343
10 04 03 343
11 04 06 343
12 05 03 343
13 11 03 343
14 11 04 343
7 03 03 343
8 03 06 343
9 03 07 343
SELECT d,a,b,c FROM t1 ORDER BY d FOR UPDATE SKIP LOCKED;
d a b c
1 07 03 343
10 04 03 343
11 04 06 343
12 05 03 343
13 11 03 343
14 11 04 343
7 03 03 343
8 03 06 343
9 03 07 343
SELECT d,a,b,c FROM t3 ORDER BY d FOR UPDATE SKIP LOCKED;
d a b c
1 07 03 343
10 04 03 343
11 04 06 343
12 05 03 343
13 11 03 343
14 11 04 343
7 03 03 343
8 03 06 343
9 03 07 343
connection default;
disconnect con1;
disconnect con2;
DROP TABLE t1, t2, t3;
DROP USER test@localhost;
DROP USER test2@localhost;
set @@global.read_only= @start_read_only;
set @@global.autocommit= @start_autocommit;
set default_storage_engine= default;
|
