{"id":5237,"date":"2024-11-14T10:58:02","date_gmt":"2024-11-14T02:58:02","guid":{"rendered":"https:\/\/fwq.ai\/blog\/5237\/"},"modified":"2024-11-14T10:58:02","modified_gmt":"2024-11-14T02:58:02","slug":"mysql%e6%80%8e%e4%b9%88%e5%8a%a0%e8%a1%8c%e9%94%81","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/5237\/","title":{"rendered":"mysql\u600e\u4e48\u52a0\u884c\u9501"},"content":{"rendered":"

\n mysql\u4e2d\u884c\u9501\u662f\u4e00\u79cd\u673a\u5236\uff0c\u901a\u8fc7\u5728select\u8bed\u53e5\u4e2d\u4f7f\u7528for update\u5b50\u53e5\u6dfb\u52a0\uff0c\u53ef\u9501\u5b9a\u7279\u5b9a\u884c\u4ee5\u963b\u6b62\u5e76\u53d1\u4fee\u6539\u3002\u884c\u9501\u6709\u5171\u4eab\u9501\uff08\u5141\u8bb8\u8bfb\u53d6\uff09\u548c\u6392\u4ed6\u9501\uff08\u7981\u6b62\u8bfb\u5199\uff09\u4e24\u79cd\u7c7b\u578b\u3002\u884c\u9501\u4f1a\u5728\u4e8b\u52a1\u7ed3\u675f\u3001\u663e\u5f0f\u91ca\u653e\u6216\u56de\u6eda\u4e8b\u52a1\u65f6\u81ea\u52a8\u91ca\u653e\u3002\u6ce8\u610f\uff0c\u884c\u9501\u4ec5\u9002\u7528\u4e8einnodb\u5b58\u50a8\u5f15\u64ce\uff0c\u4e14\u5e94\u8c28\u614e\u4f7f\u7528\uff0c\u4ee5\u514d\u5360\u7528\u7cfb\u7edf\u8d44\u6e90\u6216\u5bfc\u81f4\u6b7b\u9501\u3002\n<\/p><\/blockquote>\n

\"mysql\u600e\u4e48\u52a0\u884c\u9501\u63d2\u56fe\"<\/p>\n

MySQL\u52a0\u884c\u9501<\/strong><\/p>\n

\u5728MySQL\u4e2d\uff0c\u884c\u9501\u662f\u4e00\u79cd\u673a\u5236\uff0c\u5141\u8bb8\u7528\u6237\u9501\u5b9a\u6570\u636e\u5e93\u8868\u4e2d\u7684\u7279\u5b9a\u884c\uff0c\u4ee5\u9632\u6b62\u5176\u4ed6\u4f1a\u8bdd\u540c\u65f6\u4fee\u6539\u8fd9\u4e9b\u884c\u3002<\/p>\n

\u5982\u4f55\u6dfb\u52a0\u884c\u9501<\/strong><\/p>\n

MySQL\u4e2d\u7684\u884c\u9501\u53ef\u4ee5\u901a\u8fc7\u5728SELECT\u8bed\u53e5\u4e2d\u4f7f\u7528FOR UPDATE\u5b50\u53e5\u6765\u6dfb\u52a0\u3002\u8be5\u5b50\u53e5\u5c06\u9501\u5b9aSELECT\u8bed\u53e5\u8fd4\u56de\u7684\u4efb\u4f55\u884c\uff0c\u76f4\u5230\u4e8b\u52a1\u7ed3\u675f\u6216\u663e\u5f0f\u91ca\u653e\u9501\u4e3a\u6b62\u3002<\/p>\n

\u793a\u4f8b\uff1a<\/strong><\/p>\n

SELECT * FROM table_name WHERE id = 1 FOR UPDATE;<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u884c\u9501\u7684\u7c7b\u578b<\/strong><\/p>\n
MySQL\u4e2d\u7684\u884c\u9501\u6709\u4ee5\u4e0b\u4e24\u79cd\u7c7b\u578b\uff1a<\/p>\n
    \n
  •  \u5171\u4eab\u9501 (S\u9501)\uff1a<\/strong>\u5141\u8bb8\u5176\u4ed6\u4f1a\u8bdd\u8bfb\u53d6\u88ab\u9501\u5b9a\u7684\u884c\uff0c\u4f46\u4e0d\u80fd\u4fee\u6539\u3002<\/li>\n
  •  \u6392\u4ed6\u9501 (X\u9501)\uff1a<\/strong>\u963b\u6b62\u5176\u4ed6\u4f1a\u8bdd\u8bfb\u53d6\u6216\u4fee\u6539\u88ab\u9501\u5b9a\u7684\u884c\u3002<\/li>\n<\/ul>\n
    \u884c\u9501\u7684\u91ca\u653e<\/strong><\/p>\n
    \u884c\u9501\u5c06\u5728\u4ee5\u4e0b\u60c5\u51b5\u81ea\u52a8\u91ca\u653e\uff1a<\/p>\n
      \n
    • \u4e8b\u52a1\u7ed3\u675f<\/li>\n
    • \u4f7f\u7528UNLOCK TABLES\u8bed\u53e5\u663e\u5f0f\u91ca\u653e\u9501<\/li>\n
    • \u4f7f\u7528ROLLBACK\u8bed\u53e5\u56de\u6eda\u4e8b\u52a1<\/li>\n<\/ul>\n
      \u6ce8\u610f\uff1a<\/strong><\/p>\n
        \n
      • \u884c\u9501\u53ea\u5728MySQL\u7684InnoDB\u5b58\u50a8\u5f15\u64ce\u4e2d\u53ef\u7528\u3002<\/li>\n
      • \u884c\u9501\u4f1a\u5360\u7528\u7cfb\u7edf\u8d44\u6e90\uff0c\u56e0\u6b64\u5e94\u8c28\u614e\u4f7f\u7528\u3002<\/li>\n
      • \u5982\u679c\u591a\u4e2a\u4f1a\u8bdd\u4e89\u7528\u540c\u4e00\u884c\uff0c\u5219\u53ef\u80fd\u5bfc\u81f4\u6b7b\u9501\u3002<\/li>\n<\/ul>\n
        \u4ee5\u4e0a\u5c31\u662f\u600e\u4e48\u52a0\u884c\u9501\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8\u7c73\u4e91\u7f51\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
        mysql\u4e2d\u884c\u9501\u662f\u4e00\u79cd\u673a\u5236\uff0c\u901a\u8fc7\u5728select\u8bed\u53e5\u4e2d\u4f7f\u7528for update\u5b50\u53e5\u6dfb\u52a0\uff0c\u53ef\u9501\u5b9a\u7279\u5b9a\u884c\u4ee5\u963b\u6b62\u5e76\u53d1\u4fee\u6539\u3002\u884c\u9501\u6709\u5171\u4eab\u9501\uff08\u5141\u8bb8\u8bfb\u53d6\uff09\u548c\u6392\u4ed6\u9501\uff08\u7981\u6b62\u8bfb\u5199\uff09\u4e24\u79cd\u7c7b\u578b\u3002\u884c\u9501\u4f1a\u5728\u4e8b\u52a1\u7ed3\u675f\u3001\u663e\u5f0f\u91ca\u653e\u6216\u56de\u6eda\u4e8b\u52a1\u65f6\u81ea\u52a8\u91ca\u653e\u3002\u6ce8\u610f\uff0c\u884c\u9501\u4ec5\u9002\u7528\u4e8einnodb\u5b58\u50a8\u5f15\u64ce\uff0c\u4e14\u5e94\u8c28\u614e\u4f7f\u7528\uff0c\u4ee5\u514d\u5360\u7528\u7cfb\u7edf\u8d44\u6e90\u6216\u5bfc\u81f4\u6b7b\u9501\u3002 MySQL\u52a0\u884c\u9501 \u5728MySQL\u4e2d\uff0c\u884c\u9501\u662f\u4e00\u79cd\u673a\u5236\uff0c\u5141\u8bb8\u7528\u6237\u9501\u5b9a\u6570\u636e\u5e93\u8868\u4e2d\u7684\u7279\u5b9a\u884c\uff0c\u4ee5\u9632\u6b62\u5176\u4ed6\u4f1a\u8bdd\u540c\u65f6\u4fee\u6539\u8fd9\u4e9b\u884c\u3002 \u5982\u4f55\u6dfb\u52a0\u884c\u9501 MySQL\u4e2d\u7684\u884c\u9501\u53ef\u4ee5\u901a\u8fc7\u5728SELECT\u8bed\u53e5\u4e2d\u4f7f\u7528FOR UPDATE\u5b50\u53e5\u6765\u6dfb\u52a0\u3002\u8be5\u5b50\u53e5\u5c06\u9501\u5b9aSELECT\u8bed\u53e5\u8fd4\u56de\u7684\u4efb\u4f55\u884c\uff0c\u76f4\u5230\u4e8b\u52a1\u7ed3\u675f\u6216\u663e\u5f0f\u91ca\u653e\u9501\u4e3a\u6b62\u3002 \u793a\u4f8b\uff1a SELECT * FROM table_name WHERE id = 1 FOR UPDATE; \u767b\u5f55\u540e\u590d\u5236 \u884c\u9501\u7684\u7c7b\u578b MySQL\u4e2d\u7684\u884c\u9501\u6709\u4ee5\u4e0b\u4e24\u79cd\u7c7b\u578b\uff1a \u5171\u4eab\u9501 (S\u9501)\uff1a\u5141\u8bb8\u5176\u4ed6\u4f1a\u8bdd\u8bfb\u53d6\u88ab\u9501\u5b9a\u7684\u884c\uff0c\u4f46\u4e0d\u80fd\u4fee\u6539\u3002 \u6392\u4ed6\u9501 (X\u9501)\uff1a\u963b\u6b62\u5176\u4ed6\u4f1a\u8bdd\u8bfb\u53d6\u6216\u4fee\u6539\u88ab\u9501\u5b9a\u7684\u884c\u3002 \u884c\u9501\u7684\u91ca\u653e \u884c\u9501\u5c06\u5728\u4ee5\u4e0b\u60c5\u51b5\u81ea\u52a8\u91ca\u653e\uff1a \u4e8b\u52a1\u7ed3\u675f \u4f7f\u7528UNLOCK TABLES\u8bed\u53e5\u663e\u5f0f\u91ca\u653e\u9501 \u4f7f\u7528ROLLBACK\u8bed\u53e5\u56de\u6eda\u4e8b\u52a1 \u6ce8\u610f\uff1a \u884c\u9501\u53ea\u5728MySQL\u7684InnoDB\u5b58\u50a8\u5f15\u64ce\u4e2d\u53ef\u7528\u3002 \u884c\u9501\u4f1a\u5360\u7528\u7cfb\u7edf\u8d44\u6e90\uff0c\u56e0\u6b64\u5e94\u8c28\u614e\u4f7f\u7528\u3002 \u5982\u679c\u591a\u4e2a\u4f1a\u8bdd\u4e89\u7528\u540c\u4e00\u884c\uff0c\u5219\u53ef\u80fd\u5bfc\u81f4\u6b7b\u9501\u3002 \u4ee5\u4e0a\u5c31\u662f\u600e\u4e48\u52a0\u884c\u9501\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8\u7c73\u4e91\u7f51\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/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-5237","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/5237","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=5237"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/5237\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=5237"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=5237"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=5237"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}