{"id":189526,"date":"2024-11-12T08:31:18","date_gmt":"2024-11-12T00:31:18","guid":{"rendered":"https:\/\/server.hk\/cnblog\/189526\/"},"modified":"2024-11-12T08:31:19","modified_gmt":"2024-11-12T00:31:19","slug":"%e5%9c%96%e6%96%87%e7%b5%90%e5%90%88%e5%b8%b6%e4%bd%a0%e6%90%9e%e5%ae%9amysql%e6%97%a5%e8%aa%8c%e4%b9%8bundo-log%e5%9b%9e%e6%bb%be%e6%97%a5%e8%aa%8c","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/189526\/","title":{"rendered":"\u5716\u6587\u7d50\u5408\u5e36\u4f60\u641e\u5b9aMySQL\u65e5\u8a8c\u4e4bUndo log(\u56de\u6efe\u65e5\u8a8c)"},"content":{"rendered":"<h1 id=\"%e5%9c%96%e6%96%87%e7%b5%90%e5%90%88%e5%b8%b6%e4%bd%a0%e6%90%9e%e5%ae%9amysql%e6%97%a5%e8%aa%8c%e4%b9%8bundo-log%e5%9b%9e%e6%bb%be%e6%97%a5%e8%aa%8c-WusTwvAROe\">\u5716\u6587\u7d50\u5408\u5e36\u4f60\u641e\u5b9aMySQL\u65e5\u8a8c\u4e4bUndo log(\u56de\u6efe\u65e5\u8a8c)<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\u4e2d\uff0c\u65e5\u8a8c\u662f\u78ba\u4fdd\u6578\u64da\u4e00\u81f4\u6027\u548c\u5b8c\u6574\u6027\u7684\u91cd\u8981\u7d44\u4ef6\u3002MySQL\u4f5c\u70ba\u4e00\u500b\u6d41\u884c\u7684\u958b\u6e90\u6578\u64da\u5eab\u7cfb\u7d71\uff0c\u5176\u65e5\u8a8c\u6a5f\u5236\u4e2d\u5305\u542b\u4e86\u591a\u7a2e\u65e5\u8a8c\u985e\u578b\uff0c\u5176\u4e2dUndo log\uff08\u56de\u6efe\u65e5\u8a8c\uff09\u662f\u975e\u5e38\u95dc\u9375\u7684\u4e00\u90e8\u5206\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0eUndo log\u7684\u5de5\u4f5c\u539f\u7406\u3001\u7528\u9014\u53ca\u5176\u5728\u6578\u64da\u5eab\u64cd\u4f5c\u4e2d\u7684\u91cd\u8981\u6027\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%afundo-log%ef%bc%9f-WusTwvAROe\">\u4ec0\u9ebc\u662fUndo log\uff1f<\/h2>\n<p>Undo 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log\u689d\u76ee\u3002<\/li>\n<li><strong>\u8a18\u9304\u64cd\u4f5c\uff1a<\/strong>\u5728\u4e8b\u52d9\u57f7\u884c\u904e\u7a0b\u4e2d\uff0c\u6240\u6709\u5c0d\u6578\u64da\u7684\u4fee\u6539\u90fd\u6703\u88ab\u8a18\u9304\u5230Undo log\u4e2d\u3002\u9019\u4e9b\u8a18\u9304\u5305\u62ec\u4e86\u4fee\u6539\u524d\u7684\u6578\u64da\u72c0\u614b\u3002<\/li>\n<li><strong>\u4e8b\u52d9\u63d0\u4ea4\u6216\u56de\u6efe\uff1a<\/strong>\u5982\u679c\u4e8b\u52d9\u6210\u529f\u63d0\u4ea4\uff0cUndo log\u4e2d\u7684\u689d\u76ee\u5c07\u88ab\u6a19\u8a18\u70ba\u4e0d\u518d\u9700\u8981\uff1b\u5982\u679c\u4e8b\u52d9\u5931\u6557\uff0c\u5247\u53ef\u4ee5\u901a\u904eUndo log\u4e2d\u7684\u4fe1\u606f\u4f86\u6062\u5fa9\u6578\u64da\u3002<\/li>\n<\/ul>\n<h2 id=\"undo-log%e7%9a%84%e7%94%a8%e9%80%94-WusTwvAROe\">Undo log\u7684\u7528\u9014<\/h2>\n<p>Undo log\u7684\u4e3b\u8981\u7528\u9014\u5305\u62ec\uff1a<\/p>\n<ul>\n<li><strong>\u6578\u64da\u6062\u5fa9\uff1a<\/strong>\u5728\u4e8b\u52d9\u5931\u6557\u6216\u51fa\u73fe\u932f\u8aa4\u6642\uff0cUndo log\u53ef\u4ee5\u5e6b\u52a9\u6062\u5fa9\u6578\u64da\u5230\u4e8b\u52d9\u958b\u59cb\u4e4b\u524d\u7684\u72c0\u614b\u3002<\/li>\n<li><strong>\u652f\u6301\u591a\u7248\u672c\u4e26\u767c\u63a7\u5236\uff1a<\/strong>Undo log\u4f7f\u5f97MySQL\u80fd\u5920\u5be6\u73fe\u591a\u7248\u672c\u4e26\u767c\u63a7\u5236\uff08MVCC\uff09\uff0c\u9019\u6a23\u53ef\u4ee5\u63d0\u9ad8\u6578\u64da\u5eab\u7684\u4e26\u767c\u6027\u80fd\u3002<\/li>\n<li><strong>\u4e8b\u52d9\u9694\u96e2\u6027\uff1a<\/strong>\u901a\u904eUndo log\uff0cMySQL\u80fd\u5920\u63d0\u4f9b\u66f4\u9ad8\u7684\u4e8b\u52d9\u9694\u96e2\u6027\uff0c\u78ba\u4fdd\u4e0d\u540c\u4e8b\u52d9\u4e4b\u9593\u7684\u64cd\u4f5c\u4e0d\u6703\u4e92\u76f8\u5e72\u64fe\u3002<\/li>\n<\/ul>\n<h2 id=\"undo-log%e7%9a%84%e5%af%a6%e7%8f%be-WusTwvAROe\">Undo log\u7684\u5be6\u73fe<\/h2>\n<p>\u5728MySQL\u4e2d\uff0cUndo log\u7684\u5be6\u73fe\u4e3b\u8981\u4f9d\u8cf4\u65bcInnoDB\u5b58\u5132\u5f15\u64ce\u3002\u7576\u4e00\u500b\u4e8b\u52d9\u5c0d\u6578\u64da\u9032\u884c\u4fee\u6539\u6642\uff0cInnoDB\u6703\u751f\u6210\u76f8\u61c9\u7684Undo log\u689d\u76ee\u3002\u9019\u4e9b\u689d\u76ee\u6703\u88ab\u5beb\u5165\u5230\u78c1\u789f\u4e2d\uff0c\u4ee5\u78ba\u4fdd\u5728\u7cfb\u7d71\u5d29\u6f70\u7684\u60c5\u6cc1\u4e0b\u4ecd\u7136\u53ef\u4ee5\u6062\u5fa9\u6578\u64da\u3002<\/p>\n<pre><code>START TRANSACTION;\nUPDATE users SET balance = balance - 100 WHERE user_id = 1;\n-- \u6b64\u6642\uff0cUndo log\u6703\u8a18\u9304\u7528\u62361\u7684\u9918\u984d\u4fee\u6539\u524d\u7684\u72c0\u614b\nCOMMIT;<\/code><\/pre>\n<p>\u5728\u4e0a\u8ff0\u793a\u4f8b\u4e2d\uff0c\u7576\u7528\u62361\u7684\u9918\u984d\u88ab\u4fee\u6539\u6642\uff0cUndo log\u6703\u8a18\u9304\u4e0b\u4fee\u6539\u524d\u7684\u9918\u984d\u3002\u82e5\u4e8b\u52d9\u672a\u80fd\u6210\u529f\u63d0\u4ea4\uff0c\u5247\u53ef\u4ee5\u901a\u904eUndo log\u4f86\u6062\u5fa9\u7528\u62361\u7684\u9918\u984d\u3002<\/p>\n<h2 id=\"%e7%b8%bd%e7%b5%90-WusTwvAROe\">\u7e3d\u7d50<\/h2>\n<p>Undo log\u5728MySQL\u4e2d\u626e\u6f14\u8457\u81f3\u95dc\u91cd\u8981\u7684\u89d2\u8272\uff0c\u901a\u904e\u8a18\u9304\u4e8b\u52d9\u7684\u4fee\u6539\u64cd\u4f5c\uff0c\u78ba\u4fdd\u4e86\u6578\u64da\u7684\u4e00\u81f4\u6027\u548c\u5b8c\u6574\u6027\u3002\u4e86\u89e3Undo log\u7684\u5de5\u4f5c\u539f\u7406\u548c\u7528\u9014\uff0c\u5c0d\u65bc\u6578\u64da\u5eab\u7ba1\u7406\u548c\u7dad\u8b77\u81f3\u95dc\u91cd\u8981\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u6578\u64da\u8655\u7406\u7684\u61c9\u7528\uff0c\u9078\u64c7\u5408\u9069\u7684\u6578\u64da\u5eab\u89e3\u6c7a\u65b9\u6848\uff0c\u5982<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u6216<a href=\"https:\/\/server.hk\">\u9999\u6e2f\u4f3a\u670d\u5668<\/a>\uff0c\u80fd\u5920\u63d0\u4f9b\u66f4\u597d\u7684\u6027\u80fd\u548c\u7a69\u5b9a\u6027\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22MySQL\u7684Undo log\uff08\u56de\u6efe\u65e5\u8a8c\uff09\uff0c\u4e86\u89e3\u5176\u529f\u80fd\u8207\u61c9\u7528\uff0c\u52a9\u4f60\u8f15\u9b06\u7ba1\u7406\u6578\u64da\u56de\u6efe\u8207\u6062\u5fa9\u3002<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-189526","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/189526","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=189526"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/189526\/revisions"}],"predecessor-version":[{"id":189527,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/189526\/revisions\/189527"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=189526"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=189526"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=189526"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}