{"id":199818,"date":"2025-05-06T08:05:11","date_gmt":"2025-05-06T00:05:11","guid":{"rendered":"https:\/\/server.hk\/cnblog\/199818\/"},"modified":"2025-05-06T08:05:11","modified_gmt":"2025-05-06T00:05:11","slug":"%e4%bc%98%e5%8c%96%e8%a1%a8%e9%94%81%e5%ae%9a%e7%9a%84%e6%96%b9%e6%b3%95%e5%92%8c%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a1%b9","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/199818\/","title":{"rendered":"\u4f18\u5316\u8868\u9501\u5b9a\u7684\u65b9\u6cd5\u548c\u6ce8\u610f\u4e8b\u9879"},"content":{"rendered":"

<\/b> <\/p>\n

\u4f18\u5316\u8868\u9501\u5b9a\u7684\u65b9\u6cd5\u548c\u6ce8\u610f\u4e8b\u9879<\/h1>\n

\u76ee\u524d\u4e3b\u673a\u5b9d\u8d1d\u4e0a\u5df2\u7ecf\u6709\u5f88\u591a\u5173\u4e8e\u7684\u6587\u7ae0\u4e86\uff0c\u81ea\u5df1\u5728\u521d\u6b21\u9605\u8bfb\u8fd9\u4e9b\u6587\u7ae0\u4e2d\uff0c\u4e5f\u89c1\u8bc6\u5230\u4e86\u5f88\u591a\u5b66\u4e60\u601d\u8def\uff1b\u90a3\u4e48\u672c\u6587\uff0c\u4e5f\u5e0c\u671b\u80fd\u5e2e\u52a9\u5230\u5927\u5bb6\uff0c\u5982\u679c\u9605\u8bfb\u5b8c\u540e\u771f\u7684\u5bf9\u4f60\u5b66\u4e60\u6709\u5e2e\u52a9\uff0c\u6b22\u8fce\u52a8\u52a8\u624b\u6307\uff0c\u8bc4\u8bba\u7559\u8a00\u5e76\u5206\u4eab~<\/p>\n

Oracle\u4e2d\u8868\u9501\u5b9a\u662f\u5728\u8fdb\u884c\u6570\u636e\u64cd\u4f5c\u65f6\u5bf9\u8868\u8fdb\u884c\u52a0\u9501\uff0c\u4ee5\u786e\u4fdd\u6570\u636e\u7684\u4e00\u81f4\u6027\u548c\u5b8c\u6574\u6027\u3002\u5728\u6570\u636e\u5e93\u4e2d\uff0c\u8868\u9501\u5b9a\u662f\u4e00\u79cd\u91cd\u8981\u7684\u63a7\u5236\u673a\u5236\uff0c\u4f46\u5982\u679c\u4e0d\u6070\u5f53\u4f7f\u7528\u4f1a\u9020\u6210\u6027\u80fd\u95ee\u9898\u3002\u56e0\u6b64\uff0c\u5728\u8fdb\u884c\u8868\u9501\u5b9a\u65f6\uff0c\u9700\u8981\u6ce8\u610f\u4e00\u4e9b\u8c03\u4f18\u7b56\u7565\u548c\u6ce8\u610f\u4e8b\u9879\uff0c\u4ee5\u63d0\u9ad8\u6570\u636e\u5e93\u6027\u80fd\u548c\u51cf\u5c11\u9501\u5b9a\u5e26\u6765\u7684\u5f71\u54cd\u3002<\/p>\n

\u4e00\u3001\u8868\u9501\u5b9a\u7684\u7c7b\u578b<\/p>\n

\u5728Oracle\u6570\u636e\u5e93\u4e2d\uff0c\u8868\u9501\u5b9a\u53ef\u4ee5\u5206\u4e3a\u5171\u4eab\u9501\uff08Shared Lock\uff09\u548c\u6392\u4ed6\u9501\uff08Exclusive Lock\uff09\u4e24\u79cd\u7c7b\u578b\u3002\u5171\u4eab\u9501\u53ef\u4ee5\u88ab\u591a\u4e2a\u4e8b\u52a1\u540c\u65f6\u6301\u6709\uff0c\u7528\u4e8e\u8bfb\u53d6\u6570\u636e\u65f6\uff0c\u4e0d\u5141\u8bb8\u5176\u4ed6\u4e8b\u52a1\u540c\u65f6\u5bf9\u540c\u4e00\u6570\u636e\u884c\u8fdb\u884c\u4fee\u6539\u64cd\u4f5c\uff1b\u6392\u4ed6\u9501\u53ea\u80fd\u88ab\u4e00\u4e2a\u4e8b\u52a1\u6301\u6709\uff0c\u7528\u4e8e\u4fee\u6539\u6570\u636e\u65f6\uff0c\u5176\u4ed6\u4e8b\u52a1\u65e0\u6cd5\u5bf9\u540c\u4e00\u6570\u636e\u884c\u8fdb\u884c\u8bfb\u53d6\u6216\u4fee\u6539\u64cd\u4f5c\u3002<\/p>\n

\u4e8c\u3001\u8868\u9501\u5b9a\u7684\u8c03\u4f18\u7b56\u7565<\/p>\n

    \n
  1. \u5c3d\u91cf\u4f7f\u7528\u884c\u7ea7\u9501\u5b9a\uff1a\u5728\u8fdb\u884c\u6570\u636e\u64cd\u4f5c\u65f6\uff0c\u5c3d\u91cf\u907f\u514d\u5bf9\u6574\u4e2a\u8868\u8fdb\u884c\u9501\u5b9a\uff0c\u53ef\u4ee5\u4f7f\u7528\u884c\u7ea7\u9501\u5b9a\u6765\u51cf\u5c11\u5bf9\u6574\u4e2a\u8868\u7684\u9501\u5b9a\uff0c\u63d0\u9ad8\u5e76\u53d1\u6027\u80fd\u3002<\/li>\n
  2. \u5408\u7406\u9009\u62e9\u9501\u5b9a\u9897\u7c92\u5ea6\uff1a\u6839\u636e\u5b9e\u9645\u4e1a\u52a1\u9700\u6c42\uff0c\u9009\u62e9\u5408\u9002\u7684\u9501\u5b9a\u9897\u7c92\u5ea6\uff0c\u907f\u514d\u9501\u5b9a\u8fc7\u5927\u8303\u56f4\u7684\u6570\u636e\uff0c\u4ee5\u51cf\u5c11\u9501\u5b9a\u51b2\u7a81\u3002<\/li>\n
  3. \u51cf\u5c11\u4e8b\u52a1\u6301\u6709\u9501\u7684\u65f6\u95f4\uff1a\u5c3d\u91cf\u51cf\u5c11\u4e8b\u52a1\u6301\u6709\u9501\u7684\u65f6\u95f4\uff0c\u53ca\u65f6\u91ca\u653e\u4e8b\u52a1\u9501\u5b9a\uff0c\u4ee5\u907f\u514d\u963b\u585e\u5176\u4ed6\u4e8b\u52a1\u3002<\/li>\n
  4. \u4f7f\u7528\u9501\u5b9a\u8868\u63d0\u793a\uff1a\u53ef\u4ee5\u4f7f\u7528Oracle\u4e2d\u7684\u9501\u5b9a\u8868\u63d0\u793a\uff08FOR UPDATE\uff09\uff0c\u5728SELECT\u8bed\u53e5\u4e2d\u660e\u786e\u6307\u5b9a\u8981\u9501\u5b9a\u7684\u6570\u636e\u884c\uff0c\u907f\u514d\u9501\u5b9a\u8fc7\u591a\u6570\u636e\u3002<\/li>\n
  5. \u4f7f\u7528\u9501\u5b9a\u8d85\u65f6\u8bbe\u7f6e\uff1a\u5bf9\u4e8e\u957f\u65f6\u95f4\u6301\u6709\u9501\u7684\u4e8b\u52a1\uff0c\u53ef\u4ee5\u8bbe\u7f6e\u9501\u5b9a\u7684\u8d85\u65f6\u65f6\u95f4\uff0c\u907f\u514d\u9501\u5b9a\u8fc7\u957f\u65f6\u95f4\u5bfc\u81f4\u5176\u4ed6\u4e8b\u52a1\u7b49\u5f85\u8fc7\u4e45\u3002<\/li>\n<\/ol>\n

    \u4e09\u3001\u8868\u9501\u5b9a\u7684\u6ce8\u610f\u4e8b\u9879<\/p>\n

      \n
    1. \u907f\u514d\u6b7b\u9501\uff1a\u5728\u591a\u4e2a\u4e8b\u52a1\u540c\u65f6\u8fdb\u884c\u6570\u636e\u64cd\u4f5c\u65f6\uff0c\u8981\u6ce8\u610f\u907f\u514d\u6b7b\u9501\u7684\u53d1\u751f\uff0c\u53ca\u65f6\u68c0\u67e5\u4e8b\u52a1\u7684\u7b49\u5f85\u60c5\u51b5\u5e76\u5904\u7406\u3002<\/li>\n
    2. \u6ce8\u610f\u9501\u5b9a\u987a\u5e8f\uff1a\u5728\u8fdb\u884c\u591a\u8868\u5173\u8054\u67e5\u8be2\u65f6\uff0c\u9700\u8981\u6ce8\u610f\u9501\u5b9a\u8868\u7684\u987a\u5e8f\uff0c\u907f\u514d\u5f15\u8d77\u6b7b\u9501\u6216\u9501\u5b9a\u51b2\u7a81\u3002<\/li>\n
    3. \u907f\u514d\u9891\u7e41\u9501\u5b9a\u8868\uff1a\u907f\u514d\u5728\u9ad8\u5e76\u53d1\u73af\u5883\u4e2d\u9891\u7e41\u5bf9\u8868\u8fdb\u884c\u9501\u5b9a\uff0c\u4ee5\u51cf\u5c11\u9501\u5b9a\u5e26\u6765\u7684\u6027\u80fd\u635f\u5931\u3002<\/li>\n
    4. \u76d1\u63a7\u9501\u5b9a\u60c5\u51b5\uff1a\u53ca\u65f6\u76d1\u63a7\u6570\u636e\u5e93\u4e2d\u7684\u9501\u5b9a\u60c5\u51b5\uff0c\u8bc6\u522b\u6f5c\u5728\u7684\u9501\u5b9a\u95ee\u9898\uff0c\u5e76\u53ca\u65f6\u8fdb\u884c\u4f18\u5316\u5904\u7406\u3002<\/li>\n<\/ol>\n

      \u7efc\u4e0a\u6240\u8ff0\uff0c\u5bf9\u4e8eOracle\u6570\u636e\u5e93\u4e2d\u7684\u8868\u9501\u5b9a\uff0c\u6211\u4eec\u9700\u8981\u6839\u636e\u5b9e\u9645\u4e1a\u52a1\u9700\u6c42\uff0c\u5408\u7406\u9009\u62e9\u9501\u5b9a\u7c7b\u578b\u548c\u9897\u7c92\u5ea6\uff0c\u5e76\u91c7\u53d6\u4e00\u5b9a\u7684\u8c03\u4f18\u7b56\u7565\u548c\u6ce8\u610f\u4e8b\u9879\uff0c\u4ee5\u63d0\u9ad8\u6570\u636e\u5e93\u6027\u80fd\u548c\u51cf\u5c11\u9501\u5b9a\u5e26\u6765\u7684\u5f71\u54cd\u3002<\/p>\n

      \u4ee3\u7801\u793a\u4f8b\uff1a<\/p>\n

      \u4ee5\u4e0b\u793a\u4f8b\u6f14\u793a\u4e86\u5982\u4f55\u5728Oracle\u4e2d\u4f7f\u7528\u9501\u5b9a\u8868\u63d0\u793a\u6765\u5bf9\u6570\u636e\u884c\u8fdb\u884c\u9501\u5b9a\uff1a<\/p>\n

      SELECT * FROM employees FOR UPDATE;<\/pre>\n
      \u5728\u4ee5\u4e0a\u793a\u4f8b\u4e2d\uff0c\u901a\u8fc7FOR UPDATE\u63d0\u793a\u5bf9employees\u8868\u4e2d\u7684\u6570\u636e\u8fdb\u884c\u9501\u5b9a\uff0c\u786e\u4fdd\u6570\u636e\u5728\u4e8b\u52a1\u4fee\u6539\u64cd\u4f5c\u671f\u95f4\u4e0d\u4f1a\u88ab\u5176\u4ed6\u4e8b\u52a1\u8bfb\u53d6\u6216\u4fee\u6539\u3002<\/p>\n
      \u7ec8\u4e8e\u4ecb\u7ecd\u5b8c\u5566\uff01\u5c0f\u4f19\u4f34\u4eec\uff0c\u8fd9\u7bc7\u5173\u4e8e\u300a\u4f18\u5316\u8868\u9501\u5b9a\u7684\u65b9\u6cd5\u548c\u6ce8\u610f\u4e8b\u9879\u300b\u7684\u4ecb\u7ecd\u5e94\u8be5\u8ba9\u4f60\u6536\u83b7\u591a\u591a\u4e86\u5427\uff01\u6b22\u8fce\u5927\u5bb6\u6536\u85cf\u6216\u5206\u4eab\u7ed9\u66f4\u591a\u9700\u8981\u5b66\u4e60\u7684\u670b\u53cb\u5427~\u4e3b\u673a\u5b9d\u8d1d\u516c\u4f17\u53f7\u4e5f\u4f1a\u53d1\u5e03\u6570\u636e\u5e93\u76f8\u5173\u77e5\u8bc6\uff0c\u5feb\u6765\u5173\u6ce8\u5427\uff01<\/p>\n
      \n
      \n <\/dt>\n<\/dl>\n","protected":false},"excerpt":{"rendered":"
      \u4f18\u5316\u8868\u9501\u5b9a\u7684\u65b9\u6cd5\u548c\u6ce8\u610f\u4e8b\u9879 \u76ee\u524d...<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-199818","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/199818","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"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=199818"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/199818\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=199818"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=199818"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=199818"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}