{"id":26812,"date":"2024-11-24T09:57:06","date_gmt":"2024-11-24T01:57:06","guid":{"rendered":"https:\/\/fwq.ai\/blog\/26812\/"},"modified":"2024-11-24T09:57:06","modified_gmt":"2024-11-24T01:57:06","slug":"mysql-update-%e7%9a%84%e5%ba%95%e5%b1%82%e9%80%bb%e8%be%91%e4%b8%8e%e6%80%a7%e8%83%bd%e4%bc%98%e5%8c%96%ef%bc%9a%e5%a6%82%e4%bd%95%e9%ab%98%e6%95%88%e6%9b%b4%e6%96%b0%e5%a4%a7%e9%87%8f%e6%95%b0-2","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/26812\/","title":{"rendered":"MySQL UPDATE \u7684\u5e95\u5c42\u903b\u8f91\u4e0e\u6027\u80fd\u4f18\u5316\uff1a\u5982\u4f55\u9ad8\u6548\u66f4\u65b0\u5927\u91cf\u6570\u636e\u5e76\u907f\u514d\u6b7b\u9501\uff1f"},"content":{"rendered":"

\"MySQL<\/p>\n

MYSQL UPDATE \u7684\u5e95\u5c42\u903b\u8f91\u4e0e\u6027\u80fd\u4f18\u5316<\/strong><\/p>\n

\u5728\u5f00\u53d1\u4e2d\uff0c\u6211\u4eec\u7ecf\u5e38\u4f1a\u9762\u4e34\u5927\u91cf\u6570\u636e\u7684\u66f4\u65b0\u64cd\u4f5c\u3002\u4e86\u89e3 MYSQL \u4e2d UPDATE \u64cd\u4f5c\u7684\u5e95\u5c42\u5b9e\u73b0\u5bf9\u4e8e\u4f18\u5316\u6027\u80fd\u81f3\u5173\u91cd\u8981\u3002<\/p>\n

UPDATE \u7684\u5e95\u5c42\u903b\u8f91<\/strong><\/p>\n

UPDATE \u64cd\u4f5c\u5b9e\u73b0\u8fc7\u7a0b\u5982\u4e0b\uff1a<\/p>\n

    \n
  1. \u9501\u5b9a\u8868\uff1a<\/strong>\u5f53\u6267\u884c UPDATE \u8bed\u53e5\u65f6\uff0cMYSQL \u4f1a\u5148\u83b7\u53d6\u8868\u7684\u6392\u4ed6\u9501 (Exclusive Lock)\uff0c\u4ece\u800c\u963b\u6b62\u5176\u4ed6\u4f1a\u8bdd\u8bbf\u95ee\u8be5\u8868\u3002<\/li>\n
  2. \u83b7\u53d6\u884c\u9501\uff1a<\/strong>MYSQL \u4f7f\u7528 Next-Key Locking \u7b97\u6cd5\u83b7\u53d6\u8981\u66f4\u65b0\u884c\u7684\u884c\u9501\u3002\u8fd9\u6837\u53ef\u4ee5\u786e\u4fdd\u5c5e\u4e8e\u540c\u4e00\u884c\u7ec4\u7684\u8bb0\u5f55\u4e0d\u4f1a\u88ab\u5e76\u53d1\u64cd\u4f5c\u3002<\/li>\n
  3. \u66f4\u65b0\u6570\u636e\uff1a<\/strong>\u627e\u5230\u88ab\u9501\u5b9a\u7684\u884c\u540e\uff0cMYSQL \u5c06\u7528\u65b0\u503c\u66f4\u65b0\u5b83\u4eec\u3002<\/li>\n
  4. \u63d0\u4ea4\u4e8b\u52a1\uff1a<\/strong>\u5982\u679c UPDATE \u64cd\u4f5c\u5728\u4e8b\u52a1\u4e2d\u6267\u884c\uff0c\u5219\u5728\u4e8b\u52a1\u63d0\u4ea4\u65f6\u624d\u4f1a\u91ca\u653e\u9501\u5e76\u4fee\u6539\u6570\u636e\u3002<\/li>\n<\/ol>\n

    \u5927\u91cf\u884c\u66f4\u65b0\u6027\u80fd<\/strong><\/p>\n

    \u5f53\u9700\u8981\u66f4\u65b0\u5927\u91cf\u884c\u65f6\uff0cMYSQL \u91c7\u53d6\u4ee5\u4e0b\u65b9\u5f0f\u4f18\u5316\u6027\u80fd\uff1a<\/p>\n

      \n
    • \u6279\u5904\u7406\uff1a<\/strong>MYSQL \u5c06\u591a\u4e2a UPDATE \u8bed\u53e5\u6253\u5305\u6210\u4e00\u4e2a\u6279\u5904\u7406\u64cd\u4f5c\uff0c\u4ece\u800c\u51cf\u5c11\u6570\u636e\u5e93\u4ea4\u4e92\u6b21\u6570\u3002<\/li>\n
    • \u7d22\u5f15\u4f7f\u7528\uff1a<\/strong>\u4e3a WHERE \u5b50\u53e5\u4e2d\u5305\u542b\u7684\u5217\u521b\u5efa\u7d22\u5f15\u53ef\u4ee5\u52a0\u901f\u884c\u67e5\u627e\u3002<\/li>\n
    • \u67e5\u8be2\u7f13\u5b58\uff1a<\/strong>MYSQL \u4f1a\u7f13\u5b58\u6700\u8fd1\u6267\u884c\u7684\u67e5\u8be2\uff0c\u5982\u679c\u540e\u7eed\u67e5\u8be2\u4e0e\u7f13\u5b58\u7684\u67e5\u8be2\u5339\u914d\uff0c\u5219\u76f4\u63a5\u8fd4\u56de\u7f13\u5b58\u7ed3\u679c\u3002<\/li>\n<\/ul>\n

      \u4e8b\u52a1\u4e2d\u66f4\u65b0\u5927\u91cf\u6570\u636e\u4e0e\u6b7b\u9501<\/strong><\/p>\n

      \u867d\u7136 MYSQL \u91c7\u7528\u5404\u79cd\u4f18\u5316\u624b\u6bb5\uff0c\u4f46\u5728\u4e8b\u52a1\u66f4\u65b0\u5927\u91cf\u6570\u636e\u65f6\u4ecd\u7136\u53ef\u80fd\u51fa\u73b0\u6b7b\u9501\u3002\u8fd9\u662f\u56e0\u4e3a\uff1a<\/p>\n

        \n
      • \u7ade\u4e89\u9501\u5b9a\uff1a<\/strong>\u591a\u4e2a\u4f1a\u8bdd\u540c\u65f6\u5c1d\u8bd5\u66f4\u65b0\u540c\u4e00\u884c\u65f6\uff0c\u53ef\u80fd\u5bfc\u81f4\u6b7b\u9501\u3002<\/li>\n
      • \u957f\u4e8b\u52a1\uff1a<\/strong>\u6267\u884c\u65f6\u95f4\u8f83\u957f\u7684\u4e8b\u52a1\u4f1a\u957f\u65f6\u95f4\u4fdd\u6301\u9501\uff0c\u4ece\u800c\u589e\u52a0\u6b7b\u9501\u98ce\u9669\u3002<\/li>\n<\/ul>\n

        \u4e3a\u4e86\u907f\u514d\u6b7b\u9501\uff0c\u53ef\u4ee5\u91c7\u53d6\u4ee5\u4e0b\u63aa\u65bd\uff1a<\/p>\n

          \n
        • \u51cf\u5c11\u4e8b\u52a1\u5927\u5c0f\u548c\u6301\u7eed\u65f6\u95f4\uff1a<\/strong>\u5c06\u5927\u578b\u4e8b\u52a1\u62c6\u5206\u6210\u66f4\u5c0f\u7684\u4e8b\u52a1\u6267\u884c\u3002<\/li>\n
        • \u4f7f\u7528\u5e76\u53d1\u63a7\u5236\u673a\u5236\uff1a<\/strong>\u5982 InnoDB \u4e2d\u7684 MVCC \u673a\u5236\uff0c\u53ef\u4ee5\u8ba9\u4e8b\u52a1\u66f4\u7075\u6d3b\u5730\u5904\u7406\u6b7b\u9501\u3002<\/li>\n
        • \u91c7\u7528\u4e50\u89c2\u9501\uff1a<\/strong>\u4f7f\u7528\u7248\u672c\u53f7\u7b49\u673a\u5236\u8ddf\u8e2a\u6570\u636e\u7684\u66f4\u6539\uff0c\u5e76\u4ec5\u5728\u63d0\u4ea4\u65f6\u68c0\u67e5\u51b2\u7a81\uff0c\u4ece\u800c\u907f\u514d\u6b7b\u9501\u3002<\/li>\n<\/ul>\n

          \u4ee5\u4e0a\u5c31\u662fMySQL UPDATE \u7684\u5e95\u5c42\u903b\u8f91\u4e0e\u6027\u80fd\u4f18\u5316\uff1a\u5982\u4f55\u9ad8\u6548\u66f4\u65b0\u5927\u91cf\u6570\u636e\u5e76\u907f\u514d\u6b7b\u9501\uff1f\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8\u7c73\u4e91\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"

          MYSQL UPDATE \u7684\u5e95\u5c42\u903b\u8f91\u4e0e\u6027\u80fd\u4f18\u5316 \u5728\u5f00\u53d1\u4e2d\uff0c\u6211\u4eec\u7ecf\u5e38\u4f1a\u9762\u4e34\u5927\u91cf\u6570\u636e\u7684\u66f4\u65b0\u64cd\u4f5c\u3002\u4e86\u89e3 MYSQL \u4e2d UPDATE \u64cd\u4f5c\u7684\u5e95\u5c42\u5b9e\u73b0\u5bf9\u4e8e\u4f18\u5316\u6027\u80fd\u81f3\u5173\u91cd\u8981\u3002 UPDATE \u7684\u5e95\u5c42\u903b\u8f91 UPDATE \u64cd\u4f5c\u5b9e\u73b0\u8fc7\u7a0b\u5982\u4e0b\uff1a \u9501\u5b9a\u8868\uff1a\u5f53\u6267\u884c UPDATE \u8bed\u53e5\u65f6\uff0cMYSQL \u4f1a\u5148\u83b7\u53d6\u8868\u7684\u6392\u4ed6\u9501 (Exclusive Lock)\uff0c\u4ece\u800c\u963b\u6b62\u5176\u4ed6\u4f1a\u8bdd\u8bbf\u95ee\u8be5\u8868\u3002 \u83b7\u53d6\u884c\u9501\uff1aMYSQL \u4f7f\u7528 Next-Key Locking \u7b97\u6cd5\u83b7\u53d6\u8981\u66f4\u65b0\u884c\u7684\u884c\u9501\u3002\u8fd9\u6837\u53ef\u4ee5\u786e\u4fdd\u5c5e\u4e8e\u540c\u4e00\u884c\u7ec4\u7684\u8bb0\u5f55\u4e0d\u4f1a\u88ab\u5e76\u53d1\u64cd\u4f5c\u3002 \u66f4\u65b0\u6570\u636e\uff1a\u627e\u5230\u88ab\u9501\u5b9a\u7684\u884c\u540e\uff0cMYSQL \u5c06\u7528\u65b0\u503c\u66f4\u65b0\u5b83\u4eec\u3002 \u63d0\u4ea4\u4e8b\u52a1\uff1a\u5982\u679c UPDATE \u64cd\u4f5c\u5728\u4e8b\u52a1\u4e2d\u6267\u884c\uff0c\u5219\u5728\u4e8b\u52a1\u63d0\u4ea4\u65f6\u624d\u4f1a\u91ca\u653e\u9501\u5e76\u4fee\u6539\u6570\u636e\u3002 \u5927\u91cf\u884c\u66f4\u65b0\u6027\u80fd \u5f53\u9700\u8981\u66f4\u65b0\u5927\u91cf\u884c\u65f6\uff0cMYSQL \u91c7\u53d6\u4ee5\u4e0b\u65b9\u5f0f\u4f18\u5316\u6027\u80fd\uff1a \u6279\u5904\u7406\uff1aMYSQL \u5c06\u591a\u4e2a UPDATE \u8bed\u53e5\u6253\u5305\u6210\u4e00\u4e2a\u6279\u5904\u7406\u64cd\u4f5c\uff0c\u4ece\u800c\u51cf\u5c11\u6570\u636e\u5e93\u4ea4\u4e92\u6b21\u6570\u3002 \u7d22\u5f15\u4f7f\u7528\uff1a\u4e3a WHERE \u5b50\u53e5\u4e2d\u5305\u542b\u7684\u5217\u521b\u5efa\u7d22\u5f15\u53ef\u4ee5\u52a0\u901f\u884c\u67e5\u627e\u3002 \u67e5\u8be2\u7f13\u5b58\uff1aMYSQL \u4f1a\u7f13\u5b58\u6700\u8fd1\u6267\u884c\u7684\u67e5\u8be2\uff0c\u5982\u679c\u540e\u7eed\u67e5\u8be2\u4e0e\u7f13\u5b58\u7684\u67e5\u8be2\u5339\u914d\uff0c\u5219\u76f4\u63a5\u8fd4\u56de\u7f13\u5b58\u7ed3\u679c\u3002 \u4e8b\u52a1\u4e2d\u66f4\u65b0\u5927\u91cf\u6570\u636e\u4e0e\u6b7b\u9501 \u867d\u7136 MYSQL \u91c7\u7528\u5404\u79cd\u4f18\u5316\u624b\u6bb5\uff0c\u4f46\u5728\u4e8b\u52a1\u66f4\u65b0\u5927\u91cf\u6570\u636e\u65f6\u4ecd\u7136\u53ef\u80fd\u51fa\u73b0\u6b7b\u9501\u3002\u8fd9\u662f\u56e0\u4e3a\uff1a \u7ade\u4e89\u9501\u5b9a\uff1a\u591a\u4e2a\u4f1a\u8bdd\u540c\u65f6\u5c1d\u8bd5\u66f4\u65b0\u540c\u4e00\u884c\u65f6\uff0c\u53ef\u80fd\u5bfc\u81f4\u6b7b\u9501\u3002 \u957f\u4e8b\u52a1\uff1a\u6267\u884c\u65f6\u95f4\u8f83\u957f\u7684\u4e8b\u52a1\u4f1a\u957f\u65f6\u95f4\u4fdd\u6301\u9501\uff0c\u4ece\u800c\u589e\u52a0\u6b7b\u9501\u98ce\u9669\u3002 \u4e3a\u4e86\u907f\u514d\u6b7b\u9501\uff0c\u53ef\u4ee5\u91c7\u53d6\u4ee5\u4e0b\u63aa\u65bd\uff1a \u51cf\u5c11\u4e8b\u52a1\u5927\u5c0f\u548c\u6301\u7eed\u65f6\u95f4\uff1a\u5c06\u5927\u578b\u4e8b\u52a1\u62c6\u5206\u6210\u66f4\u5c0f\u7684\u4e8b\u52a1\u6267\u884c\u3002 \u4f7f\u7528\u5e76\u53d1\u63a7\u5236\u673a\u5236\uff1a\u5982 InnoDB \u4e2d\u7684 MVCC \u673a\u5236\uff0c\u53ef\u4ee5\u8ba9\u4e8b\u52a1\u66f4\u7075\u6d3b\u5730\u5904\u7406\u6b7b\u9501\u3002 \u91c7\u7528\u4e50\u89c2\u9501\uff1a\u4f7f\u7528\u7248\u672c\u53f7\u7b49\u673a\u5236\u8ddf\u8e2a\u6570\u636e\u7684\u66f4\u6539\uff0c\u5e76\u4ec5\u5728\u63d0\u4ea4\u65f6\u68c0\u67e5\u51b2\u7a81\uff0c\u4ece\u800c\u907f\u514d\u6b7b\u9501\u3002 \u4ee5\u4e0a\u5c31\u662fMySQL […]<\/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-26812","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/26812","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=26812"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/26812\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=26812"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=26812"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=26812"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}