{"id":2979,"date":"2022-04-24T23:37:19","date_gmt":"2022-04-24T15:37:19","guid":{"rendered":"https:\/\/www.zeroheart.xyz\/wordpress\/?p=2979"},"modified":"2022-04-24T23:37:32","modified_gmt":"2022-04-24T15:37:32","slug":"mysql-%e9%bb%98%e8%ae%a4rr%ef%bc%8c%e4%b8%ba%e4%bb%80%e4%b9%88","status":"publish","type":"post","link":"https:\/\/www.zeroheart.xyz\/wordpress\/?p=2979","title":{"rendered":"mysql \u9ed8\u8ba4rr\uff0c\u4e3a\u4ec0\u4e48"},"content":{"rendered":"\n

\u6211\u7684\u963f\u91cc\u4e8c\u9762\uff0c\u4e3a\u4ec0\u4e48MySQL\u9009\u62e9Repeatable Read\u4f5c\u4e3a\u9ed8\u8ba4\u9694\u79bb\u7ea7\u522b\uff1f (qq.com)<\/a><\/p>\n\n\n\n

\u4e3b\u8981\u662f\u65e9\u7248\u672c\u7684mysql\u7684binlog\u53ea\u652f\u6301statement\u7684\u683c\u5f0f\uff0c\u8bb0\u5f55\u7684\u662fsql\u8bed\u53e5\uff0c\u540c\u65f6\u662f\u6309\u7167\u8df3\u7684\u987a\u5e8f\u8bb0\u5f55\u7684\u3002<\/p>\n\n\n\n

\u5728\u4e3b\u4ece\u7ed3\u6784\u4e0b\uff0c\u5b58\u5728\u5f02\u5e38\u7684\u60c5\u51b5\uff1a<\/p>\n\n\n\n

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   CREATE TABLE t1 (

      a int(11) DEFAULT NULL,

      b int(11) DEFAULT NULL,

      KEY a (a)

    ) ENGINE=InnoDB DEFAULT CHARSET=latin1;

    insert into t1 values(10,2),(20,1);<\/pre>\n\n\n\n
\u63a5\u7740\u5f00\u59cb\u6267\u884c\u4e24\u4e2a\u4e8b\u52a1\u7684\u5199\u64cd\u4f5c\uff1a<\/p>\n\n\n\n
\"\"<\/figure>\n\n\n\n
\u4ee5\u4e0a\u4e24\u4e2a\u4e8b\u52a1\u6267\u884c\u4e4b\u540e\uff0c\u6570\u636e\u5e93\u91cc\u9762\u7684\u8bb0\u5f55\u4f1a\u53d8\u6210\uff0811\uff0c2\uff09\u548c\uff0820\uff0c2\uff09\uff0c\u8fd9\u4e2a\u53d1\u4e0a\u5728\u4e3b\u5e93\u7684\u6570\u636e\u53d8\u66f4\u5927\u5bb6\u90fd\u80fd\u7406\u89e3\u3002\u56e0\u4e3a\u4e8b\u52a1\u7684\u9694\u79bb\u7ea7\u522b\u662fread committed\uff0c\u6240\u4ee5\uff0c\u4e8b\u52a11\u5728\u66f4\u65b0\u65f6\uff0c\u53ea\u4f1a\u5bf9b=2\u8fd9\u884c\u52a0\u4e0a\u884c\u7ea7\u9501\uff0c\u4e0d\u4f1a\u5f71\u54cd\u5230\u4e8b\u52a12\u5bf9b=1\u8fd9\u884c\u7684\u5199\u64cd\u4f5c\u3002\u4ee5\u4e0a\u4e24\u4e2a\u4e8b\u52a1\u6267\u884c\u4e4b\u540e\uff0c\u4f1a\u5728bin log\u4e2d\u8bb0\u5f55\u4e24\u6761\u8bb0\u5f55\uff0c\u56e0\u4e3a\u4e8b\u52a12\u5148\u63d0\u4ea4\uff0c\u6240\u4ee5UPDATE t1 SET b=2 where b=1;<\/code>\u4f1a\u88ab\u4f18\u5148\u8bb0\u5f55\uff0c\u7136\u540e\u518d\u8bb0\u5f55UPDATE t1 SET a=11 where b=2;<\/code>\uff08\u518d\u6b21\u63d0\u9192\uff1astatement\u683c\u5f0f\u7684bin log\u8bb0\u5f55\u7684\u662fSQL\u8bed\u53e5\u7684\u539f\u6587\uff09\u8fd9\u6837bin log\u540c\u6b65\u5230\u5907\u5e93\u4e4b\u540e\uff0cSQL\u8bed\u53e5\u56de\u653e\u65f6\uff0c\u4f1a\u5148\u6267\u884cUPDATE t1 SET b=2 where b=1;<\/code>\uff0c\u518d\u6267\u884cUPDATE t1 SET a=11 where b=2;<\/code>\u3002\u8fd9\u65f6\u5019\uff0c\u6570\u636e\u5e93\u4e2d\u7684\u6570\u636e\u5c31\u4f1a\u53d8\u6210\uff0811\uff0c2\uff09\u548c\uff0811\uff0c2\uff09\u3002\u8fd9\u5c31\u5bfc\u81f4\u4e3b\u5e93\u548c\u5907\u5e93\u7684\u6570\u636e\u4e0d\u4e00\u81f4\u4e86\uff01\uff01\uff01\u4e3a\u4e86\u907f\u514d\u8fd9\u6837\u7684\u95ee\u9898\u53d1\u751f\u3002MySQL\u5c31\u628a\u6570\u636e\u5e93\u7684\u9ed8\u8ba4\u9694\u79bb\u7ea7\u522b\u8bbe\u7f6e\u6210\u4e86Repetable Read\uff0c\u90a3\u4e48\uff0cRepetable Read\u7684\u9694\u79bb\u7ea7\u522b\u4e0b\u662f\u5982\u4f55\u89e3\u51b3\u8fd9\u6837\u95ee\u9898\u7684\u90a3\uff1f\u90a3\u662f\u56e0\u4e3aRepetable Read\u8fd9\u79cd\u9694\u79bb\u7ea7\u522b\uff0c\u4f1a\u5728\u66f4\u65b0\u6570\u636e\u7684\u65f6\u5019\u4e0d\u4ec5\u5bf9\u66f4\u65b0\u7684\u884c\u52a0\u884c\u7ea7\u9501\uff0c\u8fd8\u4f1a\u589e\u52a0GAP lock<\/strong>\u3002\u4e0a\u9762\u7684\u4f8b\u5b50\uff0c\u5728\u4e8b\u52a12\u6267\u884c\u7684\u65f6\u5019\uff0c\u56e0\u4e3a\u4e8b\u52a11\u589e\u52a0\u4e86GAP lock\uff0c\u5c31\u4f1a\u5bfc\u81f4\u4e8b\u52a1\u6267\u884c\u88ab\u5361\u4f4f\uff0c\u9700\u8981\u7b49\u4e8b\u52a11\u63d0\u4ea4\u6216\u8005\u56de\u6eda\u540e\u624d\u80fd\u7ee7\u7eed\u6267\u884c\u3002\uff08\u5173\u4e8eGAP lock\uff0c\u6211\u540e\u9762\u4f1a\u6709\u6587\u7ae0\u5355\u72ec\u4ecb\u7ecd\uff09\u3002\u9664\u4e86\u8bbe\u7f6e\u9ed8\u8ba4\u7684\u9694\u79bb\u7ea7\u522b\u5916\uff0cMySQL\u8fd8\u7981\u6b62\u5728\u4f7f\u7528statement\u683c\u5f0f\u7684bin log\u7684\u60c5\u51b5\u4e0b\uff0c\u4f7f\u7528READ COMMITTED\u4f5c\u4e3a\u4e8b\u52a1\u9694\u79bb\u7ea7\u522b\u3002\u4e00\u65e6\u7528\u6237\u4e3b\u52a8\u4fee\u6539\u9694\u79bb\u7ea7\u522b\uff0c\u5c1d\u8bd5\u66f4\u65b0\u65f6\uff0c\u4f1a\u62a5\u9519\uff1a<\/p>\n\n\n\n
\u00a0\u00a0\u00a0\u00a0ERROR\u00a01598\u00a0(HY000):\u00a0Binary\u00a0logging\u00a0not\u00a0possible.\u00a0Message:\u00a0Transaction\u00a0level\u00a0'READ-COMMITTED'\u00a0in\u00a0InnoDB\u00a0is\u00a0not\u00a0safe\u00a0for\u00a0binlog\u00a0mode\u00a0'STATEMENT'<\/pre>\n\n\n\n
<\/p>\n","protected":false},"excerpt":{"rendered":"
\u6211\u7684\u963f\u91cc\u4e8c\u9762\uff0c\u4e3a\u4ec0\u4e48MySQL\u9009\u62e9Repeatable Read\u4f5c\u4e3a\u9ed8\u8ba4\u9694\u79bb\u7ea7\u522b\uff1f (qq.com) \u4e3b\u8981\u662f\u65e9 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[12],"tags":[],"_links":{"self":[{"href":"https:\/\/www.zeroheart.xyz\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/2979"}],"collection":[{"href":"https:\/\/www.zeroheart.xyz\/wordpress\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.zeroheart.xyz\/wordpress\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.zeroheart.xyz\/wordpress\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.zeroheart.xyz\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2979"}],"version-history":[{"count":7,"href":"https:\/\/www.zeroheart.xyz\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/2979\/revisions"}],"predecessor-version":[{"id":2987,"href":"https:\/\/www.zeroheart.xyz\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/2979\/revisions\/2987"}],"wp:attachment":[{"href":"https:\/\/www.zeroheart.xyz\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2979"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.zeroheart.xyz\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2979"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.zeroheart.xyz\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2979"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}