mysql eventµ÷Óô洢¹ý³Ì
mysql event (ÓÃÀ´ÊµÏÖ¶¨Ê±ÈÎÎñ)¡£mysql
´Ó
5.1.16
¿ªÊ¼ÓµÓеÄй¦ÄÜ¡£
ÏÂÃæÎÒдһ¸ö¼òµ¥µÄʾÀý¡£
ÏÈ´´½¨Êý¾Ý¿âºÍÁ½¸ö±í£º
drop database dep;
create database dep;
use dep;
create table aa
(id int AUTO_INCREMENT primary key,
remark varchar(20)
);
create table bb
(id int AUTO_INCREMENT primary key,
remark varchar(20)
);
ÏÈÍùa±íÖвåÈëÊý¾Ý
insert aa values(null,'aa');
insert aa values(null,'bb');
´´½¨´æ´¢¹ý³Ì£¬Æä¹¦ÄÜÊǰÑa±íµÄÄÚÈݸ´ÖƵ½b±íÖÐ.
drop PROCEDURE if exists aapro;
create PROCEDURE aapro()
begin
insert into bb (remark) select remark from aa;
commit;
end;
´´½¨mysql event,
´Ó
2010
Äê1
ÔÂ
14
ÈÕ
15
µã
24
·Ö
59
ÃëÆðÿ1·ÖÖÓµ÷ÓÃÒ»´Î
procedure aapro
¡£
drop event if exists aa_event;
create event aa_event
on SCHEDULE
EVERY 1 MINUTE STARTS '2010-01-14 15:24:59'
ON COMPLETION PRESERVE
DO call aapro();
Æð³õÎÒÖ´ÐÐÉÏÃæµÄ
aa_event¡£b±íÖÐһֱûÓÐÊý¾Ý£¬µ¥¶ÀÔËÐд洢¹ý³ÌÏÔʾÓÐÊý¾Ý£¬
ºóΪ²é×ÊÁϲÅÖªµÀûÓÐÆô¶¯mysql event,
Æô¶¯Óï¾ä:set global event_scheduler =1;
ÔÚÔËÐÐaa_event֮ǰÔËÐС£
Ôٴβéѯb±í,¾ÍÓÐÊý¾ÝÁË¡£
Ïà¹ØÎĵµ£º
¡¾×ª×Ô£ºhttp://tdcq.javaeye.com/blog/363955£¬·Ç³£¸ÐлÔ×÷Õß¡¿
ÕâÆªÎÄÕÂÊÇÍøÉϸ÷ÖÖ½â¾ömysqlÖÐÎÄÂÒÂëÎÊÌâµÄ¼¯´ó³ÉÕߣ¬Ò»°ã¿ÉÒÔ½â¾öÎÊÌâ¡£
mysql ´´½¨
Êý¾Ý¿âʱָ¶¨±àÂëºÜÖØÒª£¬ºÜ¶à¿ª·¢Õß¶¼Ê¹ÓÃÁËĬÈϱàÂ룬µ«ÊÇÎÒʹÓõľÑéÀ´¿´£¬Öƶ¨Êý¾Ý¿âµÄ±àÂë¿ÉÒԺܴó³Ì¶ÈÉϱÜÃâµ¹Èëµ¼³ö´øÀ´µÄÂÒÂëÎÊÌâ¡£
ÎÒÃÇ×ñѵıê×¼ÊÇ£¬Êý ......
PERCONA PERFORMANCE CONFERENCE 2009ÉÏ£¬À´×ÔÑÅ»¢µÄ¼¸Î»¹¤³Ìʦ´øÀ´ÁËһƪ”Efficient Pagination Using MySQL“µÄ±¨¸æ£¬ÓкܶàÁÁµã£¬±¾ÎÄÊÇÔÚÔÎÄ»ù´¡ÉϵĽøÒ»²½ÑÓÉì¡£
Ê×ÏÈ¿´Ò»Ï·ÖÒ³µÄ»ù±¾ÔÀí£º
mysql> explain SELECT * from message ORDER BY id DESC LIMIT 10000, 20\G
***************** 1. row ** ......
×òÌì½âÎöÁËdblp.xml£¬´æÈëÊý¾Ý¿â£¬Éú³ÉÁËÈô¸ÉÕÅÁÙʱ±í¡£½ñÌìÉÏÎ磬¶ÔÕâЩÁÙʱ±í½øÐд¦Àí£¬È»ºó´æÈëʵÑéÉè¼ÆµÄ±íÖС£Êý¾Ý¿âµÄÊý¾ÝÁ¿±È½Ï´ó£¬50¶àM£¬80¶àÍòÌõ¼Ç¼¡£Òò¶øÖ´ÐÐsqlʱ£¬¾ÍÓöµ½Á˺ܶàÎÊÌâ¡£
1¡¢È¥³ýÖØ¸´tuple
Ôʼdblp.xmlÖУ¬Í¬Ò»ÂÛÎĵĴæÔÚ¼¸¸öÍêÈ«ÏàͬµÄ&l ......
Ò»¡¢MySQL5.1°²×°
´ò¿ªÏÂÔØµÄ°²×°Îļþ£¬³öÏÖÈçϽçÃæ£º
mysql°²×°Ïòµ¼Æô¶¯£¬µã»÷“next”¼ÌÐø
Ñ¡Ôñ°²×°ÀàÐÍ£¬ÓГTypical£¨Ä¬ÈÏ£©”¡¢“Complete£¨ÍêÈ«£©”¡¢“Custom£¨Óû§×Ô¶ ......