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MySQL 5.1ÐÂÌØÐÔ֮ʼþµ÷¶ÈÆ÷(Event Scheduler)

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MySQL 5.1ÐÂÌØÐÔ֮ʼþµ÷¶ÈÆ÷(Event Scheduler)
CREATE-EVENT, cron, Event-Scheduler, ´¥·¢Æ÷, ¼Æ»®ÈÎÎñ, MySQL,Triggers, Ê¼þµ÷¶ÈÆ÷, ×÷Òµµ÷¶È
July 18, 2007 at 20:34:50 · Filed under MySQL
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×ÔMySQL5.1.6Æð£¬Ôö¼ÓÁËÒ»¸ö·Ç³£ÓÐÌØÉ«µÄ¹¦Äܖʼþµ÷¶ÈÆ÷(Event Scheduler)£¬¿ÉÒÔÓÃ×ö¶¨Ê±Ö´ÐÐÄ³Ð©ÌØ¶¨ÈÎÎñ£¨ÀýÈ磺ɾ³ý¼Ç¼¡¢¶ÔÊý¾Ý½øÐлã×ܵȵȣ©£¬À´È¡´úÔ­ÏÈÖ»ÄÜÓɲÙ×÷ϵͳµÄ¼Æ»®ÈÎÎñÀ´Ö´ÐеŤ×÷¡£¸üÖµµÃÒ»ÌáµÄÊÇMySQLµÄʼþµ÷¶ÈÆ÷¿ÉÒÔ¾«È·µ½Ã¿ÃëÖÓÖ´ÐÐÒ»¸öÈÎÎñ£¬¶ø²Ù×÷ϵͳµÄ¼Æ»®ÈÎÎñ£¨È磺LinuxϵÄCRON»òWindowsϵÄÈÎÎñ¼Æ»®£©Ö»Äܾ«È·µ½Ã¿·ÖÖÓÖ´ÐÐÒ»´Î¡£¶ÔÓÚһЩ¶ÔÊý¾ÝʵʱÐÔÒªÇó±È½Ï¸ßµÄÓ¦Óã¨ÀýÈ磺¹ÉƱ¡¢ÅâÂÊ¡¢±È·ÖµÈ£©¾Í·Ç³£Êʺϡ£
ʼþµ÷¶ÈÆ÷ÓÐʱҲ¿É³ÆÎªÁÙʱ´¥·¢Æ÷(temporal triggers)£¬ÒòΪʼþµ÷¶ÈÆ÷ÊÇ»ùÓÚÌØ¶¨Ê±¼äÖÜÆÚ´¥·¢À´Ö´ÐÐijЩÈÎÎñ£¬¶ø´¥·¢Æ÷(Triggers)ÊÇ»ùÓÚij¸ö±íËù²úÉúµÄʼþ´¥·¢µÄ£¬Çø±ðÒ²¾ÍÔÚÕâÀï¡£
ÔÚʹÓÃÕâ¸ö¹¦ÄÜ֮ǰ±ØÐëÈ·±£event_schedulerÒÑ¿ªÆô£¬¿ÉÖ´ÐÐ
SET GLOBAL event_scheduler = 1;
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SET GLOBAL event_scheduler = ON;
À´¿ªÆô£¬Ò²¿ÉÒÔÖ±½ÓÔÚÆô¶¯ÃüÁî¼ÓÉÏ“–event_scheduler=1”£¬ÀýÈ磺
mysqld ... --event_scheduler=1
Òª²é¿´µ±Ç°ÊÇ·ñÒÑ¿ªÆôʼþµ÷¶ÈÆ÷£¬¿ÉÖ´ÐÐÈçÏÂSQL£º
SHOW VARIABLES LIKE 'event_scheduler';
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SELECT @@event_scheduler;
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SHOW PROCESSLIST;
¶þ¡¢´´½¨Ê¼þ(CREATE EVENT)
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CREATE EVENT [IF NOT EXISTS] event_name
ON SCHEDULE schedule
[ON COMPLETION [NOT] PRESERVE]
[ENABLE | DISABLE]
[COMMENT 'comment']
DO sql_statement;
 
schedule:
AT timestamp [+ INTERVAL interval]
| EVERY interval [STARTS timestamp] [ENDS timestamp]
 
interval:
quantity {YEAR | QUARTER | MONTH | DAY | HOUR | MINUTE |
WEEK | SECOND | YEAR_MONTH | DAY_HOUR | DAY_MINUTE |
DAY_SECOND | HOUR_MINUTE | HOUR_SECOND | MINUTE_SECOND}
1) Ê×ÏÈÀ´¿´Ò»¸ö¼òµ¥µÄÀý×ÓÀ´ÑÝʾÿÃë²åÈëÒ»Ìõ¼Ç¼µ½Êý¾Ý±í
USE test;
CREATE TABLE aaa (timeline TIMESTAMP);
CREATE EVENT e_test_insert
ON SCHEDULE EVERY 1 SECOND
DO INS


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