{"id":169571,"date":"2024-11-06T19:14:06","date_gmt":"2024-11-06T11:14:06","guid":{"rendered":"https:\/\/server.hk\/cnblog\/169571\/"},"modified":"2024-11-06T19:14:06","modified_gmt":"2024-11-06T11:14:06","slug":"%e6%98%8e%e6%98%8e%e5%9c%a8innodb%e5%9f%b7%e8%a1%8c%e4%ba%86delete%ef%bc%8c%e7%82%ba%e5%95%a5%e6%95%b8%e6%93%9a%e5%88%aa%e4%ba%86%e5%80%8b%e5%af%82%e5%af%9e%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/169571\/","title":{"rendered":"\u660e\u660e\u5728InnoDB\u57f7\u884c\u4e86delete\uff0c\u70ba\u5565\u6578\u64da\u522a\u4e86\u500b\u5bc2\u5bde\uff1f"},"content":{"rendered":"

\u660e\u660e\u5728InnoDB\u57f7\u884c\u4e86delete\uff0c\u70ba\u5565\u6578\u64da\u522a\u4e86\u500b\u5bc2\u5bde\uff1f<\/h1>\n

\u5728\u4f7f\u7528MySQL\u7684InnoDB\u5b58\u5132\u5f15\u64ce\u6642\uff0c\u8a31\u591a\u958b\u767c\u8005\u53ef\u80fd\u6703\u9047\u5230\u4e00\u500b\u56f0\u60d1\u7684\u60c5\u6cc1\uff1a\u660e\u660e\u57f7\u884c\u4e86DELETE\u8a9e\u53e5\uff0c\u537b\u767c\u73fe\u6578\u64da\u4f3c\u4e4e\u4e26\u6c92\u6709\u88ab\u522a\u9664\u3002\u9019\u7a2e\u60c5\u6cc1\u53ef\u80fd\u6e90\u65bc\u591a\u7a2e\u539f\u56e0\uff0c\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e\u9019\u4e9b\u539f\u56e0\uff0c\u5e6b\u52a9\u8b80\u8005\u66f4\u597d\u5730\u7406\u89e3InnoDB\u7684\u884c\u70ba\u3002<\/p>\n

1. \u4e8b\u52d9\u7684\u7279\u6027<\/h2>\n

InnoDB\u662f\u4e00\u500b\u652f\u6301\u4e8b\u52d9\u7684\u5b58\u5132\u5f15\u64ce\uff0c\u9019\u610f\u5473\u8457\u6240\u6709\u7684\u64cd\u4f5c\u90fd\u662f\u5728\u4e8b\u52d9\u7684\u4e0a\u4e0b\u6587\u4e2d\u9032\u884c\u7684\u3002\u7576\u4f60\u57f7\u884cDELETE\u8a9e\u53e5\u6642\uff0c\u8a72\u64cd\u4f5c\u6703\u88ab\u5305\u88f9\u5728\u4e00\u500b\u4e8b\u52d9\u4e2d\uff0c\u4e26\u4e0d\u6703\u7acb\u5373\u5c0d\u6578\u64da\u5eab\u9032\u884c\u5be6\u969b\u7684\u4fee\u6539\uff0c\u76f4\u5230\u4f60\u63d0\u4ea4\uff08commit\uff09\u8a72\u4e8b\u52d9\u3002<\/p>\n

START TRANSACTION;\nDELETE FROM your_table WHERE condition;\n-- \u6b64\u6642\u6578\u64da\u5c1a\u672a\u88ab\u522a\u9664\nCOMMIT; -- \u63d0\u4ea4\u4e8b\u52d9\uff0c\u6578\u64da\u624d\u6703\u88ab\u522a\u9664\n<\/code><\/pre>\n
\u5982\u679c\u5728\u57f7\u884cDELETE\u5f8c\u6c92\u6709\u57f7\u884cCOMMIT\uff0c\u5247\u6578\u64da\u5c07\u4fdd\u6301\u4e0d\u8b8a\uff0c\u9019\u53ef\u80fd\u662f\u9020\u6210\u6578\u64da\u201c\u522a\u4e86\u500b\u5bc2\u5bde\u201d\u7684\u539f\u56e0\u4e4b\u4e00\u3002<\/p>\n
2. \u5916\u9375\u7d04\u675f<\/h2>\n
\u5728InnoDB\u4e2d\uff0c\u5916\u9375\u7d04\u675f\u53ef\u4ee5\u5f71\u97ffDELETE\u64cd\u4f5c\u7684\u7d50\u679c\u3002\u5982\u679c\u4f60\u5617\u8a66\u522a\u9664\u4e00\u689d\u8a18\u9304\uff0c\u800c\u8a72\u8a18\u9304\u88ab\u5176\u4ed6\u8868\u4e2d\u7684\u5916\u9375\u5f15\u7528\uff0c\u5247InnoDB\u6703\u963b\u6b62\u9019\u4e00\u64cd\u4f5c\uff0c\u5f9e\u800c\u5c0e\u81f4\u6578\u64da\u672a\u88ab\u522a\u9664\u3002<\/p>\n
DELETE FROM parent_table WHERE id = 1; -- \u5047\u8a2d\u9019\u689d\u8a18\u9304\u88ab\u5b50\u8868\u5f15\u7528\n<\/code><\/pre>\n
\u5728\u9019\u7a2e\u60c5\u6cc1\u4e0b\uff0cMySQL\u6703\u8fd4\u56de\u4e00\u500b\u932f\u8aa4\uff0c\u544a\u8a34\u4f60\u7121\u6cd5\u522a\u9664\u8a72\u8a18\u9304\uff0c\u56e0\u70ba\u5b83\u88ab\u5176\u4ed6\u8868\u5f15\u7528\u3002\u9019\u4e5f\u662f\u70ba\u4ec0\u9ebc\u4f60\u53ef\u80fd\u6703\u89ba\u5f97\u6578\u64da\u88ab\u522a\u9664\u537b\u53c8\u6c92\u6709\u5be6\u969b\u6539\u8b8a\u7684\u539f\u56e0\u3002<\/p>\n
3. \u96b1\u85cf\u7684DELETE\u64cd\u4f5c<\/h2>\n
\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0cDELETE\u64cd\u4f5c\u53ef\u80fd\u6703\u88ab\u89f8\u767c\uff0c\u4f46\u4e0d\u6703\u76f4\u63a5\u53cd\u6620\u5728\u6578\u64da\u5eab\u4e2d\u3002\u4f8b\u5982\uff0c\u89f8\u767c\u5668\uff08Triggers\uff09\u53ef\u4ee5\u5728\u57f7\u884cDELETE\u6642\u81ea\u52d5\u57f7\u884c\u5176\u4ed6\u64cd\u4f5c\uff0c\u9019\u53ef\u80fd\u6703\u5c0e\u81f4\u6578\u64da\u7684\u610f\u5916\u8b8a\u5316\u3002<\/p>\n
CREATE TRIGGER before_delete\nBEFORE DELETE ON your_table\nFOR EACH ROW\nBEGIN\n    -- \u5728\u522a\u9664\u4e4b\u524d\u57f7\u884c\u67d0\u4e9b\u64cd\u4f5c\nEND;\n<\/code><\/pre>\n
\u5982\u679c\u89f8\u767c\u5668\u4e2d\u5305\u542b\u4e86\u5176\u4ed6\u7684DELETE\u6216UPDATE\u64cd\u4f5c\uff0c\u9019\u53ef\u80fd\u6703\u5c0e\u81f4\u4f60\u8a8d\u70ba\u539f\u59cb\u7684DELETE\u64cd\u4f5c\u6c92\u6709\u751f\u6548\u3002<\/p>\n
4. \u96b1\u85cf\u7684\u4e8b\u52d9\u9694\u96e2\u7d1a\u5225<\/h2>\n
InnoDB\u652f\u6301\u591a\u7a2e\u4e8b\u52d9\u9694\u96e2\u7d1a\u5225\uff0c\u9019\u4e9b\u7d1a\u5225\u6703\u5f71\u97ff\u5230\u6578\u64da\u7684\u53ef\u898b\u6027\u3002\u4f8b\u5982\uff0c\u5728READ COMMITTED\u9694\u96e2\u7d1a\u5225\u4e0b\uff0c\u672a\u63d0\u4ea4\u7684\u8b8a\u66f4\u5c0d\u5176\u4ed6\u4e8b\u52d9\u662f\u4e0d\u53ef\u898b\u7684\u3002\u5982\u679c\u4f60\u5728\u4e00\u500b\u4e8b\u52d9\u4e2d\u57f7\u884c\u4e86DELETE\uff0c\u4f46\u5728\u53e6\u4e00\u500b\u4e8b\u52d9\u4e2d\u67e5\u8a62\u8a72\u6578\u64da\uff0c\u5247\u53ef\u80fd\u6703\u770b\u5230\u8a72\u6578\u64da\u4ecd\u7136\u5b58\u5728\u3002<\/p>\n
SET TRANSACTION ISOLATION LEVEL READ COMMITTED;\nSTART TRANSACTION;\nDELETE FROM your_table WHERE condition;\n-- \u5728\u53e6\u4e00\u500b\u4e8b\u52d9\u4e2d\u67e5\u8a62\nSELECT * FROM your_table; -- \u53ef\u80fd\u4ecd\u7136\u80fd\u770b\u5230\u8a72\u6578\u64da\n<\/code><\/pre>\n
5. \u6578\u64da\u5eab\u7684\u5feb\u7167<\/h2>\n
InnoDB\u4f7f\u7528\u591a\u7248\u672c\u4e26\u767c\u63a7\u5236\uff08MVCC\uff09\u4f86\u7ba1\u7406\u4e8b\u52d9\uff0c\u9019\u610f\u5473\u8457\u6bcf\u500b\u4e8b\u52d9\u90fd\u6709\u81ea\u5df1\u7684\u5feb\u7167\u3002\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u9019\u53ef\u80fd\u6703\u5c0e\u81f4\u4f60\u5728\u67e5\u8a62\u6642\u770b\u5230\u7684\u6578\u64da\u8207\u5be6\u969b\u60c5\u6cc1\u4e0d\u7b26\uff0c\u7279\u5225\u662f\u5728\u9ad8\u4e26\u767c\u74b0\u5883\u4e2d\u3002<\/p>\n
\u7e3d\u7d50<\/h2>\n
\u5728\u4f7f\u7528InnoDB\u57f7\u884cDELETE\u64cd\u4f5c\u6642\uff0c\u6578\u64da\u672a\u88ab\u522a\u9664\u7684\u539f\u56e0\u53ef\u80fd\u6d89\u53ca\u4e8b\u52d9\u672a\u63d0\u4ea4\u3001\u5916\u9375\u7d04\u675f\u3001\u89f8\u767c\u5668\u3001\u4e8b\u52d9\u9694\u96e2\u7d1a\u5225\u4ee5\u53ca\u6578\u64da\u5eab\u7684\u5feb\u7167\u7b49\u591a\u7a2e\u56e0\u7d20\u3002\u4e86\u89e3\u9019\u4e9b\u7279\u6027\u53ef\u4ee5\u5e6b\u52a9\u958b\u767c\u8005\u66f4\u6709\u6548\u5730\u7ba1\u7406\u6578\u64da\u5eab\u64cd\u4f5c\uff0c\u907f\u514d\u4e0d\u5fc5\u8981\u7684\u56f0\u60d1\u3002<\/p>\n
\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u7a69\u5b9a\u7684 \u9999\u6e2fVPS<\/a> \u89e3\u6c7a\u65b9\u6848\uff0cServer.HK \u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\u4ee5\u6eff\u8db3\u60a8\u7684\u9700\u6c42\uff0c\u7121\u8ad6\u662f\u6578\u64da\u5eab\u7ba1\u7406\u9084\u662f\u5176\u4ed6\u61c9\u7528\u7a0b\u5e8f\u7684\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u63a2\u8a0eInnoDB\u4e2d\u57f7\u884cdelete\u64cd\u4f5c\u5f8c\u6578\u64da\u672a\u522a\u9664\u7684\u539f\u56e0\uff0c\u63ed\u793a\u6f5b\u5728\u7684\u4e8b\u52d9\u9694\u96e2\u548c\u7de9\u5b58\u5f71\u97ff\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-169571","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/169571","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=169571"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/169571\/revisions"}],"predecessor-version":[{"id":169572,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/169571\/revisions\/169572"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=169571"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=169571"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=169571"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}