mirror of
https://github.com/MariaDB/server.git
synced 2025-11-02 02:53:04 +03:00
313 lines
5.3 KiB
Plaintext
313 lines
5.3 KiB
Plaintext
drop table if exists t1;
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create table t1 (a int unsigned)
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partition by list (a)
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(partition p0 values in (0),
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partition p1 values in (1),
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partition pnull values in (null),
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partition p2 values in (2));
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insert into t1 values (null),(0),(1),(2);
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select * from t1 where a < 2;
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a
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0
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1
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select * from t1 where a <= 0;
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a
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0
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select * from t1 where a < 1;
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a
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0
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select * from t1 where a > 0;
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a
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1
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2
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select * from t1 where a > 1;
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a
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2
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select * from t1 where a >= 0;
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a
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0
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1
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2
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select * from t1 where a >= 1;
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a
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1
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2
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select * from t1 where a is null;
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a
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NULL
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select * from t1 where a is not null;
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a
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0
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1
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2
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select * from t1 where a is null or a > 0;
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a
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1
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NULL
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2
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drop table t1;
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create table t1 (a int unsigned, b int)
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partition by list (a)
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subpartition by hash (b)
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subpartitions 2
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(partition p0 values in (0),
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partition p1 values in (1),
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partition pnull values in (null, 2),
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partition p3 values in (3));
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select partition_method, partition_expression, partition_description
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from information_schema.partitions where table_name = "t1";
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partition_method partition_expression partition_description
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LIST a 0
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LIST a 0
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LIST a 1
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LIST a 1
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LIST a NULL,2
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LIST a NULL,2
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LIST a 3
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LIST a 3
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insert into t1 values (0,0),(0,1),(1,0),(1,1),(null,0),(null,1);
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insert into t1 values (2,0),(2,1),(3,0),(3,1);
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explain partitions select * from t1 where a is null;
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id select_type table partitions type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 pnull_pnullsp0,pnull_pnullsp1 ALL NULL NULL NULL NULL 4 Using where
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select * from t1 where a is null;
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a b
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NULL 0
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NULL 1
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explain partitions select * from t1 where a = 2;
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id select_type table partitions type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 pnull_pnullsp0,pnull_pnullsp1 ALL NULL NULL NULL NULL 4 Using where
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select * from t1 where a = 2;
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a b
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2 0
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2 1
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select * from t1 where a <= 0;
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a b
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0 0
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0 1
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select * from t1 where a < 3;
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a b
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0 0
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0 1
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1 0
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1 1
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2 0
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2 1
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select * from t1 where a >= 1 or a is null;
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a b
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1 0
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1 1
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NULL 0
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2 0
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NULL 1
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2 1
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3 0
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3 1
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drop table t1;
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CREATE TABLE t1 (
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a int not null,
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b int not null,
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c int not null)
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partition by list(a)
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partitions 2
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(partition x123 values in (1,5,6),
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partition x234 values in (4,7,8));
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INSERT into t1 VALUES (1,1,1);
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INSERT into t1 VALUES (2,1,1);
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ERROR HY000: Table has no partition for value 2
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INSERT into t1 VALUES (3,1,1);
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ERROR HY000: Table has no partition for value 3
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INSERT into t1 VALUES (4,1,1);
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INSERT into t1 VALUES (5,1,1);
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INSERT into t1 VALUES (6,1,1);
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INSERT into t1 VALUES (7,1,1);
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INSERT into t1 VALUES (8,1,1);
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INSERT into t1 VALUES (9,1,1);
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ERROR HY000: Table has no partition for value 9
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INSERT into t1 VALUES (1,2,1);
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INSERT into t1 VALUES (1,3,1);
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INSERT into t1 VALUES (1,4,1);
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INSERT into t1 VALUES (7,2,1);
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INSERT into t1 VALUES (7,3,1);
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INSERT into t1 VALUES (7,4,1);
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SELECT * from t1;
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a b c
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1 1 1
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5 1 1
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6 1 1
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1 2 1
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1 3 1
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1 4 1
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4 1 1
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7 1 1
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8 1 1
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7 2 1
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7 3 1
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7 4 1
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SELECT * from t1 WHERE a=1;
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a b c
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1 1 1
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1 2 1
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1 3 1
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1 4 1
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SELECT * from t1 WHERE a=7;
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a b c
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7 1 1
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7 2 1
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7 3 1
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7 4 1
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SELECT * from t1 WHERE b=2;
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a b c
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1 2 1
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7 2 1
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UPDATE t1 SET a=8 WHERE a=7 AND b=3;
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SELECT * from t1;
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a b c
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1 1 1
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5 1 1
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6 1 1
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1 2 1
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1 3 1
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1 4 1
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4 1 1
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7 1 1
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8 1 1
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7 2 1
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8 3 1
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7 4 1
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UPDATE t1 SET a=8 WHERE a=5 AND b=1;
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SELECT * from t1;
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a b c
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1 1 1
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6 1 1
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1 2 1
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1 3 1
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1 4 1
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4 1 1
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7 1 1
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8 1 1
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7 2 1
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8 3 1
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7 4 1
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8 1 1
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DELETE from t1 WHERE a=8;
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SELECT * from t1;
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a b c
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1 1 1
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6 1 1
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1 2 1
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1 3 1
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1 4 1
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4 1 1
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7 1 1
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7 2 1
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7 4 1
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DELETE from t1 WHERE a=2;
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SELECT * from t1;
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a b c
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1 1 1
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6 1 1
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1 2 1
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1 3 1
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1 4 1
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4 1 1
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7 1 1
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7 2 1
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7 4 1
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DELETE from t1 WHERE a=5 OR a=6;
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SELECT * from t1;
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a b c
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1 1 1
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1 2 1
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1 3 1
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1 4 1
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4 1 1
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7 1 1
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7 2 1
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7 4 1
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ALTER TABLE t1
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partition by list(a)
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partitions 2
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(partition x123 values in (1,5,6),
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partition x234 values in (4,7,8));
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SELECT * from t1;
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a b c
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1 1 1
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1 2 1
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1 3 1
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1 4 1
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4 1 1
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7 1 1
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7 2 1
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7 4 1
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INSERT into t1 VALUES (6,2,1);
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INSERT into t1 VALUES (2,2,1);
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ERROR HY000: Table has no partition for value 2
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drop table t1;
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CREATE TABLE t1 (
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a int not null,
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b int not null,
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c int not null,
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primary key (a,b))
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partition by list (a)
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subpartition by hash (a+b)
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( partition x1 values in (1,2,3)
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( subpartition x11 nodegroup 0,
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subpartition x12 nodegroup 1),
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partition x2 values in (4,5,6)
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( subpartition x21 nodegroup 0,
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subpartition x22 nodegroup 1)
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);
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INSERT into t1 VALUES (1,1,1);
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INSERT into t1 VALUES (4,1,1);
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INSERT into t1 VALUES (7,1,1);
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ERROR HY000: Table has no partition for value 7
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UPDATE t1 SET a=5 WHERE a=1;
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SELECT * from t1;
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a b c
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5 1 1
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4 1 1
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UPDATE t1 SET a=6 WHERE a=4;
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SELECT * from t1;
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a b c
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5 1 1
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6 1 1
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DELETE from t1 WHERE a=6;
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SELECT * from t1;
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a b c
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5 1 1
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drop table t1;
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CREATE TABLE t1 (
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a int not null,
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b int not null,
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c int not null,
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primary key(a,b))
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partition by list (a)
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(partition x1 values in (1,2,9,4) tablespace ts1);
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drop table t1;
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CREATE TABLE t1 (s1 int) PARTITION BY LIST (s1)
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(PARTITION p1 VALUES IN (1),
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PARTITION p2 VALUES IN (2),
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PARTITION p3 VALUES IN (3),
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PARTITION p4 VALUES IN (4),
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PARTITION p5 VALUES IN (5));
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INSERT INTO t1 VALUES (1), (2), (3), (4), (5);
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SELECT COUNT(*) FROM t1 WHERE s1 < 3;
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COUNT(*)
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2
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DROP TABLE t1;
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create table t1 (a int auto_increment primary key)
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auto_increment=100
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partition by list (a)
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(partition p0 values in (1, 100));
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create index inx on t1 (a);
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insert into t1 values (null);
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select * from t1;
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a
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100
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drop table t1;
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create table t1 (a char(1))
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partition by list (ascii(ucase(a)))
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(partition p1 values in (2));
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ERROR HY000: This partition function is not allowed
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