par_value);SELECTCOUNT(1)INTOpar_existFROMinformation_schema.PARTITIONSWHERETABLE_SCHEMA=tb_schemaANDTABLE_NAME=tb_nameANDPARTITION_NAME=par_name;IF(par_exist=0)THENSET@alter_sql=CONCAT('alter table', tb_name,'add PARTITION (PARTITION', par_name,'VALUES IN (', par_value_str,'))');PREPAR...
LIST分区通过使用“PARTITION BY LIST(expr)”来实现,其中“expr”是某列值或一个基于某个列值、并返回一个整数值的表达式,然后通过“VALUES IN (value_list)”的方式来定义每个分区,其中“value_list”是一个通过逗号分隔的整数列表。 注释:在MySQL 5.1中,当使用LIST分区时,有可能只能匹配整数列表。 CREATE TABL...
-> partition s1 values less than(to_days('20190105')) -> ); 1. 2. 3. 4. 合并分区 alter table access_log reorganize partition s0,s1 into ( partition p4 values less than (to_days('20190105')) ); 1. 2. 3. 注意事项 MySQL分区中如果存在主键或唯一键,则分区列必须包含在其中(否则判断...
List partitioning in MySQL is similar to range partitioning in many ways. As in partitioning byRANGE, each partition must be explicitly defined. The chief difference between the two types of partitioning is that, in list partitioning, each partition is defined and selected based on the membership...
-- 插入对应分区数据。现有对应分区,才能有对应分区的数据,否则插入失败 alter table goods add partition ( PARTITION p20231010 VALUES in ('20231010') ); -- 插入对应分区数据。现有对应分区,才能有对应分区的数据,否则插入失败 -- 移除表分区,不会删除数据 ALTER TABLE goods REMOVE PARTITIONING ;...
List partitioning in MySQL is similar to range partitioning in many ways. As in partitioning byRANGE, each partition must be explicitly defined. The chief difference between the two types of partitioning is that, in list partitioning, each partition is defined and selected based on the membership...
CREATETABLEtbl_hash(i int)PARTITIONBYHASH(i)CONFIGURATION(modulus3); 思路相同,需要指定configuration,并在进行hash分区时需要提供modulus。 代码语言:javascript 代码运行次数:0 运行 AI代码解释 postgres=# create tabletpart_hash(a int primary key,b text)partition byhash(a)configuration(modulus5);CREATETABLE...
mysql5.7子分区可以是list的。子分区：也叫作复合分区或者组合分区，即在主分区下再做一层分区，将数据再次分割。注意：1、RANGE 分区、LIST 分区、HASH 分区都要求分区键必须是 INT 类型，或者通过表达式返回 INT 类型；但 KEY 和 COLUMNS 分区可以使用其他类型的列（BLOB 或 TEXT 列类型除外）作为...
Will there be a "catch-all" partition in PARTITION BY LIST? Exemple from Oracle: CREATE TABLE sales_list (salesman_id NUMBER(5), salesman_name VARCHAR2(30), sales_state VARCHAR2(20), sales_amount NUMBER(10), sales_date DATE) PARTITION BY LIST(sales_state) ...
PARTITION m VALUES IN (2,7,8)); ALTER TABLE tblist REORGANIZE PARTITION n INTO ( PARTITION a VALUES IN (1,5,6), PARTITION b VALUES IN (3,9,10)); 经过两轮的拆分,枚举列表(3,9,10)排到了(2,7,8)的前面去了;其实是这样的,一开始合并abc成nm两个分区由于n中的枚举值小于m所以n在m的...