【Mysql】创建表分区，示例代码：每个taglogging单独一个表，分成十年，每年按照哈希算法分成100份。



-- Partition the table

ALTER TABLE tlg_vid_01_10

PARTITION BY RANGE(YEAR(TIMESTAMP))

SUBPARTITION BY HASH(TO_DAYS(TIMESTAMP))

SUBPARTITIONS 100

(

PARTITION p0 VALUES LESS THAN (2021),

PARTITION p1 VALUES LESS THAN (2022),

PARTITION p2 VALUES LESS THAN (2023),

PARTITION p3 VALUES LESS THAN (2024),

PARTITION p4 VALUES LESS THAN (2025),

PARTITION p5 VALUES LESS THAN (2026),

PARTITION p6 VALUES LESS THAN (2027),

PARTITION p7 VALUES LESS THAN (2028),

PARTITION p8 VALUES LESS THAN (2029),

PARTITION p9 VALUES LESS THAN (MAXVALUE)

);



-- Show Table Partition

SELECT

partition_name part,

partition_expression expr,

partition_description descr,

table_rows

FROM

INFORMATION_SCHEMA.partitions

WHERE

TABLE_SCHEMA = 'OS07'

AND TABLE_NAME='tlg_vid_01_10' ;



-- Show Table Directory

SHOW VARIABLES LIKE 'datadir';

---

附件：
Mysq table partition sample.sql

]]>https://bbs.novotific.com/topic/37/mysql-创建表分区RSS for NodeThu, 12 Nov 2026 21:23:00 GMTTue, 29 Sep 2020 14:48:37 GMT60创建一个新的tlg表：

• 创建表
  
• 主键TableID，自增
  
• truncat清空表
  
• 表分区Partition
  
• Optimize优化表
  
• 下面代码不完全对，仅复制参考修改
  

CREATE TABLE os07.tlgxx_tempate (

PRIMARY KEY (TableID, TimeStamp)

) ENGINE = INNODB COLLATE = utf8_general_ci COMMENT = ''

SELECT

TableID,

ValueID,

TimeStamp,

TagValue,

Qaulity,

FROM

os07.tlg13_batchid

WHERE 1 = 0

-- Clear Table, Primary Key from 0;

TRUNCATE TABLE tlgxx_tempate;



-- Partition the table

ALTER TABLE tlgxx_tempate

PARTITION BY RANGE(YEAR(TIMESTAMP))

SUBPARTITION BY HASH(TO_DAYS(TIMESTAMP))

SUBPARTITIONS 100

(

PARTITION p0 VALUES LESS THAN (2021),

PARTITION p1 VALUES LESS THAN (2022),

PARTITION p2 VALUES LESS THAN (2023),

PARTITION p3 VALUES LESS THAN (2024),

PARTITION p4 VALUES LESS THAN (2025),

PARTITION p5 VALUES LESS THAN (2026),

PARTITION p6 VALUES LESS THAN (2027),

PARTITION p7 VALUES LESS THAN (2028),

PARTITION p8 VALUES LESS THAN (2029),

PARTITION p9 VALUES LESS THAN (MAXVALUE)

);

-- Optimize Partition

ALTER TABLE tlgxx_tempate

OPTIMIZE PARTITION p0,p1,p2,p3,p4,p5,p6,p7,p8,p9

---

附件：
Mysq new tlg table.sql

]]>https://bbs.novotific.com/post/129https://bbs.novotific.com/post/129Tue, 29 Sep 2020 16:21:02 GMT优化分区，碎片整理

-- Optimize Partition

ALTER TABLE tlg_batchid

OPTIMIZE PARTITION p0,p1,p2,p3,p4,p5,p6,p7,p8,p9

]]>https://bbs.novotific.com/post/128https://bbs.novotific.com/post/128Tue, 29 Sep 2020 15:03:35 GMT