mysql分区的日子

你好，我想添加分区到我的表。从过去的7天所以我想创建7分区，一个分区表多媒体contanins记录 - 一个日子，所以尝试执行此迁移：mysql分区的日子

def up 
execute "ALTER TABLE multimedia 
    partition by range (to_days(created_at)) 
    ( 
    PARTITION p0 VALUES LESS THAN (to_days(#{Time.now - (7 * 24 * 60 * 60)})), 
    PARTITION p1 VALUES LESS THAN (to_days(#{Time.now - (6 * 24 * 60 * 60)})), 
    PARTITION p2 VALUES LESS THAN (to_days(#{Time.now - (5 * 24 * 60 * 60)})), 
    PARTITION p3 VALUES LESS THAN (to_days(#{Time.now - (4 * 24 * 60 * 60)})), 
    PARTITION p4 VALUES LESS THAN (to_days(#{Time.now - (3 * 24 * 60 * 60)})), 
    PARTITION p5 VALUES LESS THAN (to_days(#{Time.now - (2 * 24 * 60 * 60)})), 
    PARTITION p6 VALUES LESS THAN (to_days(#{Time.now - (1 * 24 * 60 * 60)})), 
    PARTITION p7 VALUES LESS THAN (to_days(#{Time.now - (0 * 24 * 60 * 60)})), 
    PARTITION p8 VALUES LESS THAN MAXVALUE 
);" 
end

迁移的结果是followe错误：

An error has occurred, all later migrations canceled: 

Mysql2::Error: You have an error in your SQL syntax; check the manual that corresponds  to your MySQL server version for the right syntax to use near 
'11:09:43 +0200)), 
    PARTITION p1 VALUES LESS THAN (to_days(2012-04-18 11:0' at line 4: ALTER TABLE multimedia       
    partition by range (to_days(created_at)) 
    ( 

    == AddPartitionToMultimedia: migrating ======================================= 
-- 
    execute("ALTER TABLE multimedia \n  
partition by range (to_days(created_at))\n  
(\n   
PARTITION p0 VALUES LESS THAN (to_days(2012-04-17 11:09:43 +0200)),\n   
PARTITION p1 VALUES LESS THAN (to_days(2012-04-18 11:09:43 +0200)),\n   
PARTITION p2 VALUES LESS THAN (to_days(2012-04-19 11:09:43 +0200)),\n   
PARTITION p3 VALUES LESS THAN (to_days(2012-04-20 11:09:43 +0200)),\n   
PARTITION p4 VALUES LESS THAN (to_days(2012-04-21 11:09:43 +0200)),\n   
PARTITION p5 VALUES LESS THAN (to_days(2012-04-22 11:09:43 +0200)),\n   
PARTITION p6 VALUES LESS THAN (to_days(2012-04-23 11:09:43 +0200)),\n   
PARTITION p7 VALUES LESS THAN (to_days(2012-04-24 11:09:43 +0200)),\n   
PARTITION p8 VALUES LESS THAN MAXVALUE \n  
);")

来源

2012-04-24 Dabidi

请重新格式化，详细说明！ – lzap 2012-04-24 09:23:20

错误是：发生错误，所有后来的迁移取消： Mysql2 ::错误：您的SQL语法中有错误;请检查与您的MySQL服务器版本相对应的手册，以获取正确的语法以便在附近使用： – Dabidi 2012-04-24 09:31:03

'11：09：43 +0200）），PARTITION p1 VALUE THAIL THAN（to_days（2012-04-18 11：0'at line 4 ：ALTER TABLE multimedia 按范围分区（to_days（created_at））（' – Dabidi 2012-04-24 09:31:24

有错误在你to_days功能。您需要确保传递到to_days的值是字符串类型。类似下面的代码：

to_days('2012-04-17 11:09:43 +0200') 
     ^      ^
     |       |

来源

2012-04-24 09:52:31

http://stackoverflow.com/questions/10296759/re-partitioning-by-day – Dabidi 2012-04-24 11:12:59

mysql分区的日子

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