{"id":6440,"date":"2024-11-14T10:19:53","date_gmt":"2024-11-14T02:19:53","guid":{"rendered":"https:\/\/fwq.ai\/blog\/6440\/"},"modified":"2024-11-14T10:19:53","modified_gmt":"2024-11-14T02:19:53","slug":"mysql%e5%ae%9a%e6%97%b6%e4%bb%bb%e5%8a%a1%e6%80%8e%e4%b9%88%e5%86%99","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/6440\/","title":{"rendered":"mysql\u5b9a\u65f6\u4efb\u52a1\u600e\u4e48\u5199"},"content":{"rendered":"

\n mysql \u5b9a\u65f6\u4efb\u52a1\u53ef\u901a\u8fc7 event \u8bed\u53e5\u521b\u5efa\uff0c\u7528\u4e8e\u5728\u6307\u5b9a\u65f6\u95f4\u95f4\u9694\u81ea\u52a8\u6267\u884c\u4efb\u52a1\u3002\u521b\u5efa\u8bed\u6cd5\u4e3a\uff1acreate event event_name on schedule [at start_time | every interval_value] do [\u4efb\u52a1] end\u3002\u53ef\u4ee5\u4f7f\u7528 show events \u67e5\u8be2\u3001alter event \u4fee\u6539\u3001drop event \u5220\u9664\u5b9a\u65f6\u4efb\u52a1\u3002\n<\/p><\/blockquote>\n

\"mysql\u5b9a\u65f6\u4efb\u52a1\u600e\u4e48\u5199\u63d2\u56fe\"<\/p>\n

\u5982\u4f55\u4f7f\u7528 MySQL \u521b\u5efa\u5b9a\u65f6\u4efb\u52a1<\/strong><\/p>\n

MySQL \u662f\u4e00\u79cd\u529f\u80fd\u5f3a\u5927\u7684\u6570\u636e\u5e93\u7ba1\u7406\u7cfb\u7edf\uff0c\u5b83\u5141\u8bb8\u60a8\u5728\u7279\u5b9a\u65f6\u95f4\u95f4\u9694\u81ea\u52a8\u6267\u884c\u4efb\u52a1\u3002\u8981\u521b\u5efa MySQL \u5b9a\u65f6\u4efb\u52a1\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528 EVENT \u8bed\u53e5\u3002<\/p>\n

\u521b\u5efa EVENT \u8bed\u53e5<\/strong><\/p>\n

CREATE EVENT event_name\nON SCHEDULE\n  AT start_time\n  EVERY interval_value\nDO\n  -- \u8981\u6267\u884c\u7684\u4efb\u52a1\nEND;<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u53c2\u6570\u8bf4\u660e\uff1a<\/strong><\/p>\n
    \n
  •  event_name\uff1a<\/strong>\u5b9a\u65f6\u4efb\u52a1\u7684\u540d\u79f0\u3002<\/li>\n
  •  ON SCHEDULE\uff1a<\/strong>\u6307\u5b9a\u4efb\u52a1\u8c03\u5ea6\u7684\u7c7b\u578b\u3002\u53ef\u4ee5\u662f AT\uff08\u7279\u5b9a\u65f6\u95f4\uff09\u6216 EVERY\uff08\u7279\u5b9a\u65f6\u95f4\u95f4\u9694\uff09\u3002<\/li>\n
  •  AT start_time\uff1a<\/strong>\u5982\u679c ON SCHEDULE \u4e3a AT\uff0c\u5219\u6307\u5b9a\u4efb\u52a1\u5f00\u59cb\u6267\u884c\u7684\u65f6\u95f4\u3002<\/li>\n
  •  EVERY interval_value\uff1a<\/strong>\u5982\u679c ON SCHEDULE \u4e3a EVERY\uff0c\u5219\u6307\u5b9a\u4efb\u52a1\u6267\u884c\u7684\u9891\u7387\uff0c\u4f8b\u5982 EVERY 1 DAY\uff08\u6bcf\u5929\u6267\u884c\u4e00\u6b21\uff09\u3002<\/li>\n
  •  DO\uff1a<\/strong>\u6307\u5b9a\u8981\u6267\u884c\u7684\u4efb\u52a1\u3002\u53ef\u4ee5\u4f7f\u7528 SQL \u8bed\u53e5\u6216\u5b58\u50a8\u8fc7\u7a0b\u3002<\/li>\n<\/ul>\n
    \u793a\u4f8b<\/strong><\/p>\n
    \u4ee5\u4e0b\u793a\u4f8b\u521b\u5efa\u4e00\u4e2a\u6bcf\u5c0f\u65f6\u6267\u884c\u4e00\u6b21\u7684\u5b9a\u65f6\u4efb\u52a1\uff0c\u8be5\u4efb\u52a1\u5c06 user_activity \u8868\u4e2d\u7684\u8bb0\u5f55\u4ece\u6570\u636e\u5e93\u4e2d\u5220\u9664\uff1a<\/p>\n
    CREATE EVENT hourly_cleanup\nON SCHEDULE\n  EVERY 1 HOUR\nDO\n  DELETE FROM user_activity\n  WHERE timestamp < DATE_SUB(NOW(), INTERVAL 1 HOUR);\nEND;<\/pre>\n
     \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
    \u7ba1\u7406 EVENT<\/strong><\/p>\n
    \u4e00\u65e6\u521b\u5efa\u4e86\u5b9a\u65f6\u4efb\u52a1\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u8bed\u53e5\u5bf9\u5176\u8fdb\u884c\u7ba1\u7406\uff1a<\/p>\n
      \n
    •  \u67e5\u8be2 EVENT\uff1a<\/strong>SHOW EVENTS;<\/li>\n
    •  \u542f\u7528\/\u7981\u7528 EVENT\uff1a<\/strong>ALTER EVENT event_name [ENABLE | DISABLE];<\/li>\n
    •  \u5220\u9664 EVENT\uff1a<\/strong>DROP EVENT event_name;<\/li>\n<\/ul>\n
      \u6ce8\u610f\u4e8b\u9879<\/strong><\/p>\n
        \n
      • MySQL 8.0 \u53ca\u66f4\u9ad8\u7248\u672c\u652f\u6301 EVENT\u3002<\/li>\n
      • \u786e\u4fdd MySQL \u670d\u52a1\u5668\u6b63\u5728\u8fd0\u884c\uff0c\u5e76\u4e14\u5b9a\u65f6\u4efb\u52a1\u5df2\u542f\u7528\u3002<\/li>\n
      • \u5b9a\u65f6\u4efb\u52a1\u5c06\u5728\u670d\u52a1\u5668\u65f6\u95f4\u800c\u4e0d\u662f\u5ba2\u6237\u7aef\u65f6\u95f4\u6267\u884c\u3002<\/li>\n<\/ul>\n
        \u4ee5\u4e0a\u5c31\u662f\u5b9a\u65f6\u4efb\u52a1\u600e\u4e48\u5199\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8\u7c73\u4e91\u7f51\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
        mysql \u5b9a\u65f6\u4efb\u52a1\u53ef\u901a\u8fc7 event \u8bed\u53e5\u521b\u5efa\uff0c\u7528\u4e8e\u5728\u6307\u5b9a\u65f6\u95f4\u95f4\u9694\u81ea\u52a8\u6267\u884c\u4efb\u52a1\u3002\u521b\u5efa\u8bed\u6cd5\u4e3a\uff1acreate event event_name on schedule [at start_time | every interval_value] do [\u4efb\u52a1] end\u3002\u53ef\u4ee5\u4f7f\u7528 show events \u67e5\u8be2\u3001alter event \u4fee\u6539\u3001drop event \u5220\u9664\u5b9a\u65f6\u4efb\u52a1\u3002 \u5982\u4f55\u4f7f\u7528 MySQL \u521b\u5efa\u5b9a\u65f6\u4efb\u52a1 MySQL \u662f\u4e00\u79cd\u529f\u80fd\u5f3a\u5927\u7684\u6570\u636e\u5e93\u7ba1\u7406\u7cfb\u7edf\uff0c\u5b83\u5141\u8bb8\u60a8\u5728\u7279\u5b9a\u65f6\u95f4\u95f4\u9694\u81ea\u52a8\u6267\u884c\u4efb\u52a1\u3002\u8981\u521b\u5efa MySQL \u5b9a\u65f6\u4efb\u52a1\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528 EVENT \u8bed\u53e5\u3002 \u521b\u5efa EVENT \u8bed\u53e5 CREATE EVENT event_name ON SCHEDULE AT start_time EVERY interval_value DO — \u8981\u6267\u884c\u7684\u4efb\u52a1 END; \u767b\u5f55\u540e\u590d\u5236 \u53c2\u6570\u8bf4\u660e\uff1a event_name\uff1a\u5b9a\u65f6\u4efb\u52a1\u7684\u540d\u79f0\u3002 ON SCHEDULE\uff1a\u6307\u5b9a\u4efb\u52a1\u8c03\u5ea6\u7684\u7c7b\u578b\u3002\u53ef\u4ee5\u662f AT\uff08\u7279\u5b9a\u65f6\u95f4\uff09\u6216 EVERY\uff08\u7279\u5b9a\u65f6\u95f4\u95f4\u9694\uff09\u3002 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[],"class_list":["post-6440","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/6440","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/comments?post=6440"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/6440\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=6440"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=6440"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=6440"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}