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DROP TABLE IF EXISTS t1,t2,t3,t4;
FLUSH STATUS;
---------------------------------------by range------------------------------------------
CREATE TABLE t1 (i int, a VARCHAR(1000) COMPRESSED DEFAULT "AAA") CHARSET=latin1
PARTITION BY RANGE COLUMNS (a)(
PARTITION p0 VALUES LESS THAN ('g') COMMENT "p0",
PARTITION p1 VALUES LESS THAN ('m'),
PARTITION p2 VALUES LESS THAN ('t'),
PARTITION p3 VALUES LESS THAN ('w'));
ALTER TABLE t1 ADD PARTITION (PARTITION p4 VALUES LESS THAN (MAXVALUE));
INSERT INTO t1 VALUES (1,REPEAT('a',100)),(2,REPEAT('v',200)),(3,REPEAT('r',300)),(4,NULL);
INSERT INTO t1 VALUES (5,REPEAT('k',500)),(6,'April'),(7,7),(8,""),(9,"M"),(10,DEFAULT);
ALTER TABLE t1 ANALYZE PARTITION p1;
Table Op Msg_type Msg_text
test.t1 analyze status OK
ALTER TABLE t1 CHECK PARTITION p2;
Table Op Msg_type Msg_text
test.t1 check status OK
SELECT i,SUBSTRING(a,1,10) FROM t1 PARTITION (p2) ORDER BY i;
i SUBSTRING(a,1,10)
3 rrrrrrrrrr
9 M
SELECT i,SUBSTRING(a,1,10) FROM t1 where length(a)>=300 ORDER BY i;
i SUBSTRING(a,1,10)
3 rrrrrrrrrr
5 kkkkkkkkkk
SELECT i,SUBSTRING(a,1,10) FROM t1 where a like "%k" ORDER BY i;
i SUBSTRING(a,1,10)
5 kkkkkkkkkk
DELETE FROM t1 where a="";
DELETE FROM t1 where a=(REPEAT('a',100));
DELETE FROM t1 where a like "%v";
SELECT i,SUBSTRING(a,1,10) FROM t1 ORDER BY i;
i SUBSTRING(a,1,10)
3 rrrrrrrrrr
4 NULL
5 kkkkkkkkkk
6 April
7 7
9 M
10 AAA
SELECT i,SUBSTRING(a,1,10) FROM t1 where a not like "%k" ORDER BY i;
i SUBSTRING(a,1,10)
3 rrrrrrrrrr
6 April
7 7
9 M
10 AAA
SELECT i,SUBSTRING(a,1,10) FROM t1 where (a>'m') ORDER BY i;
i SUBSTRING(a,1,10)
3 rrrrrrrrrr
SELECT i,SUBSTRING(a,1,10) FROM t1 where (a between 'h' and 'z') and (i=9) ORDER BY i;
i SUBSTRING(a,1,10)
9 M
EXPLAIN PARTITIONS SELECT i,SUBSTRING(a,1,10) FROM t1 where (a>'m');
id select_type table partitions type possible_keys key key_len ref rows Extra
1 SIMPLE t1 p2,p3,p4 ALL NULL NULL NULL NULL 2 Using where
EXPLAIN PARTITIONS SELECT i,SUBSTRING(a,1,10) FROM t1 where (a<'w');
id select_type table partitions type possible_keys key key_len ref rows Extra
1 SIMPLE t1 p0,p1,p2,p3 ALL NULL NULL NULL NULL 7 Using where
ALTER TABLE t1 TRUNCATE PARTITION p2;
ALTER TABLE t1 DROP PARTITION p0;
SHOW CREATE TABLE t1;
Table Create Table
t1 CREATE TABLE `t1` (
`i` int(11) DEFAULT NULL,
`a` varchar(1000) /*M!100301 COMPRESSED*/ DEFAULT 'AAA'
) ENGINE=MyISAM DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci
PARTITION BY RANGE COLUMNS(`a`)
(PARTITION `p1` VALUES LESS THAN ('m') ENGINE = MyISAM,
PARTITION `p2` VALUES LESS THAN ('t') ENGINE = MyISAM,
PARTITION `p3` VALUES LESS THAN ('w') ENGINE = MyISAM,
PARTITION `p4` VALUES LESS THAN (MAXVALUE) ENGINE = MyISAM)
ALTER TABLE t1 MODIFY COLUMN a VARCHAR(1000);
SHOW CREATE TABLE t1;
Table Create Table
t1 CREATE TABLE `t1` (
`i` int(11) DEFAULT NULL,
`a` varchar(1000) DEFAULT NULL
) ENGINE=MyISAM DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci
PARTITION BY RANGE COLUMNS(`a`)
(PARTITION `p1` VALUES LESS THAN ('m') ENGINE = MyISAM,
PARTITION `p2` VALUES LESS THAN ('t') ENGINE = MyISAM,
PARTITION `p3` VALUES LESS THAN ('w') ENGINE = MyISAM,
PARTITION `p4` VALUES LESS THAN (MAXVALUE) ENGINE = MyISAM)
DROP TABLE t1;
---------------------------------------------------------------------------------------------
CREATE TABLE t1 (a VARCHAR(1000) COMPRESSED NOT NULL, id INT) CHARSET=latin1
PARTITION BY RANGE COLUMNS(id,a)(
PARTITION p0 VALUES LESS THAN (100,'sss'),
PARTITION p1 VALUES LESS THAN (MAXVALUE,MAXVALUE));
INSERT INTO t1 VALUES (REPEAT('a',100), 23),(REPEAT('v',100),123),(REPEAT('z',100),24),(REPEAT('k',100),124);
SELECT id,SUBSTRING(a,1,10) FROM t1 order by id;
id SUBSTRING(a,1,10)
23 aaaaaaaaaa
24 zzzzzzzzzz
123 vvvvvvvvvv
124 kkkkkkkkkk
SELECT * from t1 partition (p0);
a id
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa 23
zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz 24
SELECT * from t1 partition (p1);
a id
vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv 123
kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk 124
INSERT INTO t1 VALUES (REPEAT('a',100),101);
SELECT * from t1 partition (p0);
a id
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa 23
zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz 24
SELECT * from t1 partition (p1);
a id
vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv 123
kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk 124
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa 101
ALTER TABLE t1 DROP PARTITION p1;
SELECT id,SUBSTRING(a,1,10) FROM t1 WHERE id<50 order by id;
id SUBSTRING(a,1,10)
23 aaaaaaaaaa
24 zzzzzzzzzz
INSERT INTO t1 VALUES (REPEAT('a',100),101);
ERROR HY000: Table has no partition for value from column_list
ALTER TABLE t1 ALTER COLUMN a SET DEFAULT 'qwerty';
ALTER TABLE t1 ALTER COLUMN a DROP DEFAULT;
ALTER TABLE t1 MODIFY COLUMN a VARCHAR(1000);
ALTER TABLE t1 ALTER COLUMN a DROP DEFAULT;
INSERT INTO t1 VALUES (REPEAT('b',100),11);
INSERT INTO t1 VALUES (default,10);
ALTER TABLE t1 MODIFY COLUMN a VARCHAR(1000) COMPRESSED;
SHOW CREATE TABLE t1;
Table Create Table
t1 CREATE TABLE `t1` (
`a` varchar(1000) /*M!100301 COMPRESSED*/ DEFAULT NULL,
`id` int(11) DEFAULT NULL
) ENGINE=MyISAM DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci
PARTITION BY RANGE COLUMNS(`id`,`a`)
(PARTITION `p0` VALUES LESS THAN (100,'sss') ENGINE = MyISAM)
SELECT * from t1 ORDER BY id;
a id
NULL 10
bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb 11
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa 23
zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz 24
DROP TABLE t1;
----------------------------1 partition--------------------------------------------------
CREATE TABLE t1 (a VARCHAR(1000) COMPRESSED DEFAULT "10-12-2010") CHARSET=latin1
PARTITION BY RANGE COLUMNS (a) (partition p0 VALUES LESS THAN (MAXVALUE));
INSERT INTO t1 VALUES (REPEAT('a',100)), (REPEAT('v',200)), (REPEAT('Z',300)),(NULL),(DEFAULT);
INSERT INTO t1 VALUES (DEFAULT),(REPEAT('b',200)),(REPEAT('q',300)),(DEFAULT),("MAY");
SELECT SUBSTRING(a,1,10) FROM t1;
SUBSTRING(a,1,10)
10-12-2010
10-12-2010
10-12-2010
MAY
NULL
ZZZZZZZZZZ
aaaaaaaaaa
bbbbbbbbbb
qqqqqqqqqq
vvvvvvvvvv
-----------------------------------------by key------------------------------------------
ALTER TABLE t1 PARTITION BY KEY(a) PARTITIONS 6;
SHOW CREATE TABLE t1;
Table Create Table
t1 CREATE TABLE `t1` (
`a` varchar(1000) /*M!100301 COMPRESSED*/ DEFAULT '10-12-2010'
) ENGINE=MyISAM DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci
PARTITION BY KEY (`a`)
PARTITIONS 6
UPDATE t1 SET a="NEW" where length(a)<20;
SELECT SUBSTRING(a,1,10) FROM t1;
SUBSTRING(a,1,10)
NEW
NEW
NEW
NEW
NULL
ZZZZZZZZZZ
aaaaaaaaaa
bbbbbbbbbb
qqqqqqqqqq
vvvvvvvvvv
CREATE TABLE t2 (a VARBINARY(1000) COMPRESSED)
PARTITION BY KEY(a) PARTITIONS 3;
ALTER TABLE t2 PARTITION BY LINEAR KEY ALGORITHM=2 (a) PARTITIONS 32;
INSERT INTO t2 VALUES (REPEAT('a',100)),(REPEAT('v',6)),(REPEAT('z',13)),(REPEAT('k',900));
SELECT SUBSTRING(a,1,10) FROM t2;
SUBSTRING(a,1,10)
aaaaaaaaaa
kkkkkkkkkk
vvvvvv
zzzzzzzzzz
CREATE TABLE t3 ( a VARCHAR(1000) COMPRESSED DEFAULT NULL) CHARSET=latin1
PARTITION BY LINEAR KEY(a) PARTITIONS 3;
INSERT INTO t3 VALUES (REPEAT('a',100)),(REPEAT('v',100)),(NULL),(REPEAT('k',100)),(DEFAULT);
SELECT SUBSTRING(a,1,10) FROM t3 where a<>NULL;
SUBSTRING(a,1,10)
CREATE TABLE t4 (a VARBINARY(1000) COMPRESSED NOT NULL DEFAULT 0 COMMENT "QQ") CHARSET=latin1
PARTITION BY LINEAR KEY(a)
PARTITIONS 3;
INSERT INTO t4 VALUES (REPEAT('a',100)),('0'),(DEFAULT),(DEFAULT),(REPEAT('v',100)),(REPEAT('k',100));
SELECT SUBSTRING(a,1,10) FROM t4 where length(a)>3;
SUBSTRING(a,1,10)
aaaaaaaaaa
kkkkkkkkkk
vvvvvvvvvv
DROP TABLE t1,t2,t3,t4;
-----------------------------------subpartitions------------------------------------------
CREATE TABLE t1 (a VARCHAR(1000) COMPRESSED, id INT NOT NULL) CHARSET=latin1
PARTITION BY RANGE(id)
SUBPARTITION BY KEY(a) SUBPARTITIONS 4
(PARTITION p0 VALUES LESS THAN (5),
PARTITION p1 VALUES LESS THAN (MAXVALUE));
INSERT INTO t1 VALUES (REPEAT('a',100),23),(REPEAT('v',100),123),(REPEAT('z',100),24),(REPEAT('k',100),124);
SELECT id,SUBSTRING(a,1,10) FROM t1 where a=(REPEAT('k',100)) order by id;
id SUBSTRING(a,1,10)
124 kkkkkkkkkk
DROP TABLE t1;
-------------------------------------------------------------------------------------------
CREATE TABLE t1 (a BLOB COMPRESSED)
PARTITION BY KEY(a) partitions 30;
ERROR HY000: A BLOB field is not allowed in partition function
CREATE TABLE t1 (a VARCHAR(200) COMPRESSED) CHARSET=latin1 PARTITION BY KEY(a) partitions 30;
ALTER TABLE t1 COALESCE PARTITION 20;
ALTER TABLE t1 ADD PARTITION (PARTITION pm);
CREATE TABLE t2 like t1;
ALTER TABLE t2 REMOVE PARTITIONING;
SHOW CREATE TABLE t1;
Table Create Table
t1 CREATE TABLE `t1` (
`a` varchar(200) /*M!100301 COMPRESSED*/ DEFAULT NULL
) ENGINE=MyISAM DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci
PARTITION BY KEY (`a`)
(PARTITION `p0` ENGINE = MyISAM,
PARTITION `p1` ENGINE = MyISAM,
PARTITION `p2` ENGINE = MyISAM,
PARTITION `p3` ENGINE = MyISAM,
PARTITION `p4` ENGINE = MyISAM,
PARTITION `p5` ENGINE = MyISAM,
PARTITION `p6` ENGINE = MyISAM,
PARTITION `p7` ENGINE = MyISAM,
PARTITION `p8` ENGINE = MyISAM,
PARTITION `p9` ENGINE = MyISAM,
PARTITION `pm` ENGINE = MyISAM)
SHOW CREATE TABLE t2;
Table Create Table
t2 CREATE TABLE `t2` (
`a` varchar(200) /*M!100301 COMPRESSED*/ DEFAULT NULL
) ENGINE=MyISAM DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci
ALTER TABLE t1 EXCHANGE PARTITION pm WITH TABLE t2;
DROP TABLE t1,t2;
-------------------------------------------------------------------------------------------
CREATE TABLE t1 (a BLOB COMPRESSED default 5,i int);
INSERT INTO t1 VALUES (REPEAT('a',100),1),(REPEAT('v',100),2),(REPEAT('z',100),3),(REPEAT('k',100),2),(2,2);
ALTER TABLE t1 PARTITION BY KEY(a) partitions 3;
ERROR HY000: A BLOB field is not allowed in partition function
ALTER TABLE t1 PARTITION BY HASH(i) PARTITIONS 8;
ALTER TABLE t1 REORGANIZE PARTITION p0 INTO (
PARTITION s0 VALUES LESS THAN (1960),
PARTITION s1 VALUES LESS THAN (1970)
);
ERROR HY000: Only RANGE PARTITIONING can use VALUES LESS THAN in partition definition
SHOW CREATE TABLE t1;
Table Create Table
t1 CREATE TABLE `t1` (
`a` blob /*M!100301 COMPRESSED*/ DEFAULT 5,
`i` int(11) DEFAULT NULL
) ENGINE=MyISAM DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_uca1400_ai_ci
PARTITION BY HASH (`i`)
PARTITIONS 8
ALTER TABLE t1 REMOVE PARTITIONING;
DROP TABLE t1;
CREATE TABLE t1 (a VARCHAR(500) COMPRESSED default 5,i int) CHARSET=latin1
PARTITION BY RANGE COLUMNS(i)(
PARTITION p0 VALUES LESS THAN (10),
PARTITION p1 VALUES LESS THAN (100),
PARTITION p2 VALUES LESS THAN (1000));
INSERT INTO t1 VALUES (REPEAT('a',100),1),("one",21),(REPEAT('3',100),34),(REPEAT('k',100),267),(2,278);
ALTER TABLE t1 REORGANIZE PARTITION p2 INTO (PARTITION p22 VALUES LESS THAN (MAXVALUE));
SHOW CREATE TABLE t1;
Table Create Table
t1 CREATE TABLE `t1` (
`a` varchar(500) /*M!100301 COMPRESSED*/ DEFAULT '5',
`i` int(11) DEFAULT NULL
) ENGINE=MyISAM DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci
PARTITION BY RANGE COLUMNS(`i`)
(PARTITION `p0` VALUES LESS THAN (10) ENGINE = MyISAM,
PARTITION `p1` VALUES LESS THAN (100) ENGINE = MyISAM,
PARTITION `p22` VALUES LESS THAN (MAXVALUE) ENGINE = MyISAM)
ALTER TABLE t1 REBUILD PARTITION p22;
DROP TABLE t1;
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