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45bc7574fb
Remove usage of deprecated variable storage_engine. It was deprecated in 5.5 but it never issued a deprecation warning. Make it issue a warning in 10.5.1. Replaced with default_storage_engine.
89 lines
2.9 KiB
Text
89 lines
2.9 KiB
Text
SET @@session.default_storage_engine = 'MyISAM';
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drop table if exists t1;
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# Case 1. Partitioning by RANGE based on a non-stored virtual column.
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CREATE TABLE t1 (
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a DATE NOT NULL,
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b int as (year(a))
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)
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PARTITION BY RANGE( b ) (
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PARTITION p0 VALUES LESS THAN (2006),
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PARTITION p2 VALUES LESS THAN (2008)
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);
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insert into t1 values ('2006-01-01',default);
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insert into t1 values ('2007-01-01',default);
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insert into t1 values ('2005-01-01',default);
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insert into t1 (a) values ('2007-01-02');
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select * from t1;
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a b
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2005-01-01 2005
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2006-01-01 2006
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2007-01-01 2007
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2007-01-02 2007
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select partition_name,table_rows,data_length from information_schema.partitions where table_name = 't1';
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partition_name table_rows data_length
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p0 1 7
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p2 3 21
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# Modify the expression of virtual column b
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ALTER TABLE t1 modify b int as (year(a)-1);
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select * from t1;
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a b
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2005-01-01 2004
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2006-01-01 2005
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2007-01-01 2006
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2007-01-02 2006
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select partition_name,table_rows,data_length from information_schema.partitions where table_name = 't1';
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partition_name table_rows data_length
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p0 2 14
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p2 2 14
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drop table t1;
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# Case 2. Partitioning by LIST based on a stored virtual column.
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CREATE TABLE t1 (a int, b int as (a % 3 ) persistent)
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PARTITION BY LIST (a+1)
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(PARTITION p1 VALUES IN (1), PARTITION p2 VALUES IN (2));
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insert into t1 values (1,default);
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select partition_name,table_rows,data_length from information_schema.partitions where table_name = 't1';
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partition_name table_rows data_length
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p1 0 0
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p2 1 9
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select * from t1;
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a b
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1 1
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select * from t1;
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a b
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1 1
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drop table t1;
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# Case 3. Partitioning by HASH based on a non-stored virtual column.
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CREATE TABLE t1 (
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a DATE NOT NULL,
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b int as (year(a))
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)
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PARTITION BY HASH( b % 3 ) PARTITIONS 3;
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insert into t1 values ('2005-01-01',default);
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insert into t1 values ('2006-01-01',default);
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select * from t1;
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a b
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2005-01-01 2005
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2006-01-01 2006
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select partition_name,table_rows,data_length from information_schema.partitions where table_name = 't1';
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partition_name table_rows data_length
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p0 0 0
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p1 1 7
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p2 1 7
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# Modify the expression of virtual column b
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ALTER TABLE t1 modify b int as (year(a)-1);
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select * from t1;
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a b
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2005-01-01 2004
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2006-01-01 2005
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select partition_name,table_rows,data_length from information_schema.partitions where table_name = 't1';
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partition_name table_rows data_length
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p0 1 7
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p1 1 7
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p2 0 0
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drop table t1;
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create table t1 (a int, b datetime as (now())) partition by hash(b+1) partitions 3;
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ERROR HY000: Constant, random or timezone-dependent expressions in (sub)partitioning function are not allowed
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create table t1 (a int, b varchar(100) as (user())) partition by hash(b+1) partitions 3;
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ERROR HY000: Constant, random or timezone-dependent expressions in (sub)partitioning function are not allowed
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create table t1 (a int, b double as (rand())) partition by hash(b+1) partitions 3;
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ERROR HY000: Constant, random or timezone-dependent expressions in (sub)partitioning function are not allowed
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