{"id":187448,"date":"2024-11-11T14:21:17","date_gmt":"2024-11-11T06:21:17","guid":{"rendered":"https:\/\/server.hk\/cnblog\/187448\/"},"modified":"2024-11-11T14:21:18","modified_gmt":"2024-11-11T06:21:18","slug":"%e6%95%b8%e6%93%9a%e5%ba%ab%e5%af%ab%e6%93%8d%e4%bd%9c%e6%a3%84%e7%94%a8select-for-update%e8%a7%a3%e6%b1%ba%e6%96%b9%e6%a1%88","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/187448\/","title":{"rendered":"\u6578\u64da\u5eab\u5beb\u64cd\u4f5c\u68c4\u7528\u201cSELECT \u2026 FOR UPDATE\u201d\u89e3\u6c7a\u65b9\u6848"},"content":{"rendered":"<h1 id=\"%e6%95%b8%e6%93%9a%e5%ba%ab%e5%af%ab%e6%93%8d%e4%bd%9c%e6%a3%84%e7%94%a8select-for-update%e8%a7%a3%e6%b1%ba%e6%96%b9%e6%a1%88-gIkGtOCisI\">\u6578\u64da\u5eab\u5beb\u64cd\u4f5c\u68c4\u7528\u201cSELECT \u2026 FOR UPDATE\u201d\u89e3\u6c7a\u65b9\u6848<\/h1>\n<p>\u5728\u73fe\u4ee3\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\u4e2d\uff0c\u6578\u64da\u4e00\u81f4\u6027\u548c\u6027\u80fd\u662f\u5169\u500b\u81f3\u95dc\u91cd\u8981\u7684\u8003\u91cf\u56e0\u7d20\u3002\u96a8\u8457\u61c9\u7528\u7a0b\u5e8f\u7684\u8907\u96dc\u6027\u589e\u52a0\uff0c\u958b\u767c\u8005\u9762\u81e8\u8457\u5982\u4f55\u6709\u6548\u5730\u7ba1\u7406\u6578\u64da\u5eab\u5beb\u64cd\u4f5c\u7684\u6311\u6230\u3002\u50b3\u7d71\u4e0a\uff0c\u8a31\u591a\u958b\u767c\u8005\u4f7f\u7528\u201cSELECT \u2026 FOR UPDATE\u201d\u8a9e\u53e5\u4f86\u9396\u5b9a\u884c\uff0c\u4ee5\u9632\u6b62\u5176\u4ed6\u4e8b\u52d9\u540c\u6642\u4fee\u6539\u9019\u4e9b\u884c\u3002\u7136\u800c\uff0c\u9019\u7a2e\u65b9\u6cd5\u5728\u9ad8\u4e26\u767c\u74b0\u5883\u4e2d\u53ef\u80fd\u5c0e\u81f4\u6027\u80fd\u74f6\u9838\u548c\u6b7b\u9396\u554f\u984c\u3002\u56e0\u6b64\uff0c\u5c0b\u627e\u66ff\u4ee3\u65b9\u6848\u6210\u70ba\u4e86\u7576\u524d\u7684\u8feb\u5207\u9700\u6c42\u3002<\/p>\n<h2 id=\"select-for-update%e7%9a%84%e5%b7%a5%e4%bd%9c%e5%8e%9f%e7%90%86-gIkGtOCisI\">\u201cSELECT \u2026 FOR UPDATE\u201d\u7684\u5de5\u4f5c\u539f\u7406<\/h2>\n<p>\u201cSELECT \u2026 FOR UPDATE\u201d\u8a9e\u53e5\u7684\u4e3b\u8981\u529f\u80fd\u662f\u9396\u5b9a\u9078\u5b9a\u7684\u884c\uff0c\u76f4\u5230\u7576\u524d\u4e8b\u52d9\u5b8c\u6210\u3002\u9019\u6a23\u53ef\u4ee5\u78ba\u4fdd\u5728\u4e8b\u52d9\u8655\u7406\u671f\u9593\uff0c\u5176\u4ed6\u4e8b\u52d9\u7121\u6cd5\u4fee\u6539\u9019\u4e9b\u884c\u3002\u96d6\u7136\u9019\u7a2e\u65b9\u6cd5\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\u662f\u6709\u6548\u7684\uff0c\u4f46\u5728\u9ad8\u4e26\u767c\u74b0\u5883\u4e2d\uff0c\u9396\u5b9a\u884c\u53ef\u80fd\u6703\u5c0e\u81f4\u6027\u80fd\u4e0b\u964d\uff0c\u56e0\u70ba\u5176\u4ed6\u4e8b\u52d9\u5fc5\u9808\u7b49\u5f85\u9396\u91cb\u653e\u3002<\/p>\n<h2 id=\"%e6%80%a7%e8%83%bd%e5%95%8f%e9%a1%8c%e8%88%87%e6%8c%91%e6%88%b0-gIkGtOCisI\">\u6027\u80fd\u554f\u984c\u8207\u6311\u6230<\/h2>\n<ul>\n<li><strong>\u6b7b\u9396\u98a8\u96aa\uff1a<\/strong>\u7576\u591a\u500b\u4e8b\u52d9\u76f8\u4e92\u7b49\u5f85\u5c0d\u65b9\u91cb\u653e\u9396\u6642\uff0c\u6703\u5c0e\u81f4\u6b7b\u9396\uff0c\u9019\u6703\u5f71\u97ff\u7cfb\u7d71\u7684\u7a69\u5b9a\u6027\u3002<\/li>\n<li><strong>\u6027\u80fd\u74f6\u9838\uff1a<\/strong>\u5728\u9ad8\u4e26\u767c\u60c5\u6cc1\u4e0b\uff0c\u9396\u5b9a\u884c\u6703\u5c0e\u81f4\u5176\u4ed6\u4e8b\u52d9\u7684\u5ef6\u9072\uff0c\u5f9e\u800c\u5f71\u97ff\u6574\u9ad4\u6027\u80fd\u3002<\/li>\n<li><strong>\u53ef\u64f4\u5c55\u6027\u554f\u984c\uff1a<\/strong>\u96a8\u8457\u7528\u6236\u6578\u91cf\u7684\u589e\u52a0\uff0c\u4f7f\u7528\u201cSELECT \u2026 FOR UPDATE\u201d\u53ef\u80fd\u6703\u9650\u5236\u7cfb\u7d71\u7684\u53ef\u64f4\u5c55\u6027\u3002<\/li>\n<\/ul>\n<h2 id=\"%e6%9b%bf%e4%bb%a3%e6%96%b9%e6%a1%88-gIkGtOCisI\">\u66ff\u4ee3\u65b9\u6848<\/h2>\n<p>\u70ba\u4e86\u89e3\u6c7a\u4e0a\u8ff0\u554f\u984c\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u8003\u616e\u4ee5\u4e0b\u5e7e\u7a2e\u66ff\u4ee3\u65b9\u6848\uff1a<\/p>\n<h3 id=\"1-%e4%bd%bf%e7%94%a8%e6%a8%82%e8%a7%80%e9%8e%96-gIkGtOCisI\">1. \u4f7f\u7528\u6a02\u89c0\u9396<\/h3>\n<p>\u6a02\u89c0\u9396\u662f\u4e00\u7a2e\u4e0d\u4f7f\u7528\u884c\u9396\u7684\u7b56\u7565\u3002\u5b83\u5047\u8a2d\u5728\u4e8b\u52d9\u57f7\u884c\u671f\u9593\u4e0d\u6703\u767c\u751f\u885d\u7a81\u3002\u5728\u66f4\u65b0\u6578\u64da\u4e4b\u524d\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u6aa2\u67e5\u6578\u64da\u7684\u7248\u672c\u865f\u6216\u6642\u9593\u6233\u3002\u5982\u679c\u7248\u672c\u865f\u672a\u8b8a\uff0c\u5247\u53ef\u4ee5\u5b89\u5168\u5730\u9032\u884c\u66f4\u65b0\uff1b\u5426\u5247\uff0c\u5247\u9700\u8981\u91cd\u65b0\u8b80\u53d6\u6578\u64da\u4e26\u91cd\u8a66\u64cd\u4f5c\u3002<\/p>\n<pre><code>UPDATE table_name \nSET column1 = value1, version = version + 1 \nWHERE id = some_id AND version = current_version;<\/code><\/pre>\n<h3 id=\"2-%e4%bd%bf%e7%94%a8%e9%9a%8a%e5%88%97%e7%b3%bb%e7%b5%b1-gIkGtOCisI\">2. \u4f7f\u7528\u968a\u5217\u7cfb\u7d71<\/h3>\n<p>\u5c07\u5beb\u64cd\u4f5c\u653e\u5165\u968a\u5217\u4e2d\uff0c\u7136\u5f8c\u7531\u55ae\u4e00\u7684\u6d88\u8cbb\u8005\u9032\u884c\u8655\u7406\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u6e1b\u5c11\u4e26\u767c\u5beb\u5165\u7684\u885d\u7a81\u3002\u9019\u7a2e\u65b9\u6cd5\u53ef\u4ee5\u78ba\u4fdd\u6bcf\u6b21\u53ea\u6709\u4e00\u500b\u5beb\u64cd\u4f5c\u5728\u9032\u884c\uff0c\u5f9e\u800c\u907f\u514d\u9396\u5b9a\u554f\u984c\u3002<\/p>\n<h3 id=\"3-%e5%88%86%e5%8d%80%e8%a1%a8-gIkGtOCisI\">3. \u5206\u5340\u8868<\/h3>\n<p>\u5c07\u6578\u64da\u5206\u5340\u53ef\u4ee5\u6e1b\u5c11\u9396\u7684\u7bc4\u570d\u3002\u6bcf\u500b\u5206\u5340\u53ef\u4ee5\u7368\u7acb\u8655\u7406\u5beb\u64cd\u4f5c\uff0c\u5f9e\u800c\u964d\u4f4e\u9396\u7af6\u722d\u7684\u53ef\u80fd\u6027\u3002\u9019\u7a2e\u65b9\u6cd5\u7279\u5225\u9069\u5408\u65bc\u5927\u6578\u64da\u96c6\u3002<\/p>\n<h2 id=\"%e7%b5%90%e8%ab%96-gIkGtOCisI\">\u7d50\u8ad6<\/h2>\n<p>\u5728\u9ad8\u4e26\u767c\u74b0\u5883\u4e2d\uff0c\u68c4\u7528\u201cSELECT \u2026 FOR UPDATE\u201d\u8a9e\u53e5\u662f\u63d0\u5347\u6578\u64da\u5eab\u6027\u80fd\u548c\u7a69\u5b9a\u6027\u7684\u6709\u6548\u7b56\u7565\u3002\u901a\u904e\u63a1\u7528\u6a02\u89c0\u9396\u3001\u968a\u5217\u7cfb\u7d71\u6216\u5206\u5340\u8868\u7b49\u66ff\u4ee3\u65b9\u6848\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u66f4\u597d\u5730\u7ba1\u7406\u6578\u64da\u5eab\u7684\u5beb\u64cd\u4f5c\uff0c\u5f9e\u800c\u63d0\u9ad8\u61c9\u7528\u7a0b\u5e8f\u7684\u6574\u9ad4\u6027\u80fd\u548c\u7528\u6236\u9ad4\u9a57\u3002<\/p>\n<p>\u5982\u9700\u4e86\u89e3\u66f4\u591a\u6709\u95dc\u6578\u64da\u5eab\u7ba1\u7406\u548c\u9ad8\u6548\u80fd\u89e3\u6c7a\u65b9\u6848\u7684\u4fe1\u606f\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9 <a href=\"https:\/\/server.hk\">Server.HK<\/a>\uff0c\u63a2\u7d22\u6211\u5011\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u548c <a href=\"https:\/\/server.hk\">\u9999\u6e2f\u4f3a\u670d\u5668<\/a> \u670d\u52d9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22\u6578\u64da\u5eab\u5beb\u64cd\u4f5c\u4e2d\u68c4\u7528\u201cSELECT \u2026 FOR UPDATE\u201d\u7684\u89e3\u6c7a\u65b9\u6848\uff0c\u63d0\u5347\u6027\u80fd\u8207\u6578\u64da\u4e00\u81f4\u6027\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-187448","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/187448","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=187448"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/187448\/revisions"}],"predecessor-version":[{"id":187449,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/187448\/revisions\/187449"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=187448"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=187448"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=187448"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}