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drop table if exists t1;
CREATE TABLE t1 (
a int not null,
b int not null,
c int not null,
primary key(a,b),
index (a))
engine = ndb
partition by range (a)
partitions 3
(partition x1 values less than (5),
partition x2 values less than (10),
partition x3 values less than (20));
INSERT into t1 values (1, 1, 1);
INSERT into t1 values (6, 1, 1);
INSERT into t1 values (10, 1, 1);
INSERT into t1 values (15, 1, 1);
select * from information_schema.partitions where table_name= 't1';
TABLE_CATALOG TABLE_SCHEMA TABLE_NAME PARTITION_NAME SUBPARTITION_NAME PARTITION_ORDINAL_POSITION SUBPARTITION_ORDINAL_POSITION PARTITION_METHOD SUBPARTITION_METHOD PARTITION_EXPRESSION SUBPARTITION_EXPRESSION PARTITION_DESCRIPTION TABLE_ROWS AVG_ROW_LENGTH DATA_LENGTH MAX_DATA_LENGTH INDEX_LENGTH DATA_FREE CREATE_TIME UPDATE_TIME CHECK_TIME CHECKSUM PARTITION_COMMENT NODEGROUP TABLESPACE_NAME
def test t1 x1 NULL 1 NULL RANGE NULL a NULL 5 1 40 32768 # 0 0 # # NULL NULL default NULL
def test t1 x2 NULL 2 NULL RANGE NULL a NULL 10 1 40 32768 # 0 0 # # NULL NULL default NULL
def test t1 x3 NULL 3 NULL RANGE NULL a NULL 20 2 40 32768 # 0 0 # # NULL NULL default NULL
select * from t1 order by a;
a b c
1 1 1
6 1 1
10 1 1
15 1 1
select * from t1 where a=1 order by a;
a b c
1 1 1
select * from t1 where a=15 and b=1 order by a;
a b c
15 1 1
select * from t1 where a=21 and b=1 order by a;
a b c
select * from t1 where a=21 order by a;
a b c
select * from t1 where a in (1,6,10,21) order by a;
a b c
1 1 1
6 1 1
10 1 1
select * from t1 where b=1 and a in (1,6,10,21) order by a;
a b c
1 1 1
6 1 1
10 1 1
INSERT into t1 values (1, 2, 2);
select max(b) from t1 where a = 1;
max(b)
2
select b from t1 where a = 1 order by b desc;
b
2
1
drop table t1;
CREATE TABLE t1 (
a int not null,
b int not null,
c int not null,
primary key(b),
unique (a))
engine = ndb
partition by range (b)
partitions 3
(partition x1 values less than (5),
partition x2 values less than (10),
partition x3 values less than (20));
INSERT into t1 values (1, 1, 1);
INSERT into t1 values (2, 6, 1);
INSERT into t1 values (3, 10, 1);
INSERT into t1 values (4, 15, 1);
select * from t1 order by a;
a b c
1 1 1
2 6 1
3 10 1
4 15 1
UPDATE t1 set a = 5 WHERE b = 15;
select * from t1 order by a;
a b c
1 1 1
2 6 1
3 10 1
5 15 1
UPDATE t1 set a = 6 WHERE a = 5;
select * from t1 order by a;
a b c
1 1 1
2 6 1
3 10 1
6 15 1
select * from t1 where b=1 order by b;
a b c
1 1 1
select * from t1 where b=15 and a=1 order by b;
a b c
select * from t1 where b=21 and a=1 order by b;
a b c
select * from t1 where b=21 order by b;
a b c
select * from t1 where b in (1,6,10,21) order by b;
a b c
1 1 1
2 6 1
3 10 1
select * from t1 where a in (1,2,5,6) order by b;
a b c
1 1 1
2 6 1
6 15 1
select * from t1 where a=1 and b in (1,6,10,21) order by b;
a b c
1 1 1
select * from t1 where b=6;
a b c
2 6 1
DELETE from t1 WHERE b = 6;
select * from t1 where b=6;
a b c
select * from t1 where a=6;
a b c
6 15 1
UPDATE t1 SET c=1001 WHERE a=6;
select * from t1 where a=6;
a b c
6 15 1001
DELETE from t1 WHERE a = 6;
select * from t1 where a=6;
a b c
show create table t1;
Table Create Table
t1 CREATE TABLE `t1` (
`a` int(11) NOT NULL,
`b` int(11) NOT NULL,
`c` int(11) NOT NULL,
PRIMARY KEY (`b`),
UNIQUE KEY `a` (`a`)
) ENGINE=ndbcluster DEFAULT CHARSET=latin1
/*!50100 PARTITION BY RANGE (b)
(PARTITION x1 VALUES LESS THAN (5) ENGINE = ndbcluster,
PARTITION x2 VALUES LESS THAN (10) ENGINE = ndbcluster,
PARTITION x3 VALUES LESS THAN (20) ENGINE = ndbcluster) */
drop table t1;
CREATE TABLE t1
(id MEDIUMINT NOT NULL,
b1 BIT(8),
vc VARCHAR(255),
bc CHAR(255),
d DECIMAL(10,4) DEFAULT 0,
f FLOAT DEFAULT 0,
total BIGINT UNSIGNED,
y YEAR,
t DATE PRIMARY KEY) ENGINE=NDB
PARTITION BY RANGE (YEAR(t))
(PARTITION p0 VALUES LESS THAN (1901),
PARTITION p1 VALUES LESS THAN (1946),
PARTITION p2 VALUES LESS THAN (1966),
PARTITION p3 VALUES LESS THAN (1986),
PARTITION p4 VALUES LESS THAN (2005),
PARTITION p5 VALUES LESS THAN MAXVALUE);
INSERT INTO t1 VALUES (0,NULL,NULL,NULL,NULL,NULL,NULL,NULL, '2009-05-15');
SELECT * FROM t1;
id b1 vc bc d f total y t
0 NULL NULL NULL NULL NULL NULL NULL 2009-05-15
ALTER TABLE t1 ENGINE=MYISAM;
SELECT * FROM t1;
id b1 vc bc d f total y t
0 NULL NULL NULL NULL NULL NULL NULL 2009-05-15
DROP TABLE t1;
CREATE LOGFILE GROUP lg1
ADD UNDOFILE 'undofile.dat'
INITIAL_SIZE 16M
UNDO_BUFFER_SIZE=1M
ENGINE=NDB;
CREATE TABLESPACE ts1
ADD DATAFILE 'datafile.dat'
USE LOGFILE GROUP lg1
INITIAL_SIZE 12M
EXTENT_SIZE 256k
ENGINE NDB;
CREATE TABLE test.t1 (
a1 INT,
a2 TEXT NOT NULL,
a3 BIT NOT NULL,
a4 DECIMAL(8,3),
a5 INT NOT NULL,
a6 INT,
PRIMARY KEY(a1))
TABLESPACE ts1 STORAGE DISK ENGINE=NDB
PARTITION BY LIST (a1)
(PARTITION p0 VALUES IN (1,2,3,4,5),
PARTITION p1 VALUES IN (6,7,8,9, 10),
PARTITION p2 VALUES IN (11, 12, 13, 14, 15));
ALTER TABLE test.t1 DROP COLUMN a6;
ALTER TABLE test.t1 ADD COLUMN a6 VARCHAR(255);
SELECT COUNT(*) FROM test.t1;
COUNT(*)
15
ALTER TABLE test.t1 DROP COLUMN a4;
SELECT COUNT(*) FROM test.t1;
COUNT(*)
15
DROP TABLE t1;
CREATE TABLE test.t1 (
a1 INT,
a2 TEXT NOT NULL,
a3 BIT NOT NULL,
a4 DECIMAL(8,3),
a5 INT NOT NULL,
a6 VARCHAR(255),
PRIMARY KEY(a1))
TABLESPACE ts1 STORAGE DISK ENGINE=NDB
PARTITION BY HASH(a1)
PARTITIONS 4;
SELECT COUNT(*) FROM test.t1;
COUNT(*)
15
ALTER TABLE test.t1 DROP COLUMN a4;
SELECT COUNT(*) FROM test.t1;
COUNT(*)
15
DROP TABLE t1;
ALTER TABLESPACE ts1
DROP DATAFILE 'datafile.dat'
ENGINE=NDB;
DROP TABLESPACE ts1 ENGINE=NDB;
DROP LOGFILE GROUP lg1 ENGINE=NDB;
CREATE TABLE t1
(id MEDIUMINT NOT NULL PRIMARY KEY,
b1 BIT(8),
vc VARCHAR(255),
bc CHAR(255),
d DECIMAL(10,4) DEFAULT 0,
f FLOAT DEFAULT 0,
total BIGINT UNSIGNED,
y YEAR,
t DATE) ENGINE=NDB
PARTITION BY LIST(id)
(PARTITION p0 VALUES IN (2, 4),
PARTITION p1 VALUES IN (42, 142));
INSERT INTO t1 VALUES (2,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL);
SELECT * FROM t1;
id b1 vc bc d f total y t
2 NULL NULL NULL NULL NULL NULL NULL NULL
ALTER TABLE t1 ADD PARTITION
(PARTITION p2 VALUES IN (412));
SELECT * FROM t1;
id b1 vc bc d f total y t
2 NULL NULL NULL NULL NULL NULL NULL NULL
DROP TABLE t1;
CREATE TABLE t1 (
a int not null PRIMARY KEY,
b int not null,
c int not null)
partition by list(a)
partitions 2
(partition x123 values in (1,5,6),
partition x234 values in (4,7,8));
INSERT into t1 VALUES (5,1,1);
select * from t1;
a b c
5 1 1
UPDATE t1 SET a=8 WHERE a=5 AND b=1;
select * from t1;
a b c
8 1 1
drop table t1;
CREATE TABLE t1 ( f1 INTEGER PRIMARY KEY, f2 char(20)) engine=ndb
PARTITION BY RANGE(f1)
( PARTITION part1 VALUES LESS THAN (2),
PARTITION part2 VALUES LESS THAN (1000));
INSERT INTO t1 VALUES(1, '---1---');
INSERT INTO t1 VALUES(2, '---2---');
select * from t1 order by f1;
f1 f2
1 ---1---
2 ---2---
UPDATE t1 SET f1 = f1 + 4 WHERE f1 = 2;
select * from t1 order by f1;
f1 f2
1 ---1---
6 ---2---
UPDATE t1 SET f1 = f1 + 4 WHERE f1 = 1;
select * from t1 order by f1;
f1 f2
5 ---1---
6 ---2---
drop table t1;
create table t1 ( a int, b int, c int, primary key (a,b)) engine=ndb
partition by range (a)
(partition part0 values less than (3),
partition part1 values less than (6));
insert into t1 values (0, 0, 0);
insert into t1 values (0, 1, 1);
insert into t1 values (0, 2, 2);
insert into t1 values (1, 0, 3);
insert into t1 values (1, 1, 4);
insert into t1 values (1, 2, 5);
insert into t1 values (4, 0, 6);
insert into t1 values (4, 1, 7);
insert into t1 values (4, 2, 8);
All partitions scan
select * from t1 order by c;
a b c
0 0 0
0 1 1
0 2 2
1 0 3
1 1 4
1 2 5
4 0 6
4 1 7
4 2 8
ndb_scan_count
1
ndb_pruned_scan_count
0
Single partition scan
select * from t1 where a=0 order by c;
a b c
0 0 0
0 1 1
0 2 2
ndb_scan_count
1
ndb_pruned_scan_count
1
Single partition scan
select * from t1 where a=4 order by c;
a b c
4 0 6
4 1 7
4 2 8
ndb_scan_count
1
ndb_pruned_scan_count
1
Single partition scan
select * from t1 where a<3 order by c;
a b c
0 0 0
0 1 1
0 2 2
1 0 3
1 1 4
1 2 5
ndb_scan_count
1
ndb_pruned_scan_count
1
MRR single partition scan
select * from t1 where a in (0, 2) order by c;
a b c
0 0 0
0 1 1
0 2 2
ndb_scan_count
1
ndb_pruned_scan_count
1
drop table t1;
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