{"id":5403,"date":"2020-07-30T00:23:37","date_gmt":"2020-07-29T16:23:37","guid":{"rendered":"http:\/\/39.97.231.10\/?p=5403"},"modified":"2020-07-30T00:23:37","modified_gmt":"2020-07-29T16:23:37","slug":"mysql%e9%9a%94%e7%a6%bb%e7%ba%a7%e5%88%ab%e8%af%bb%e6%9c%aa%e6%8f%90%e4%ba%a4read-uncommitted%e7%9a%84%e5%a6%99%e7%94%a8","status":"publish","type":"post","link":"http:\/\/www.weijing.co\/?p=5403","title":{"rendered":"MySQL\u9694\u79bb\u7ea7\u522b\u8bfb\u672a\u63d0\u4ea4(Read uncommitted)\u7684\u5999\u7528"},"content":{"rendered":"
\n
\n\u770b\u5230\u4e00\u4e2aMySQL\u9762\u8bd5\u9898\uff0c\u5173\u4e8e\u9694\u79bb\u7ea7\u522b\uff0c\u8bfb\u672a\u63d0\u4ea4(Read uncommitted)\u7684\u4e00\u4e2a\u4f7f\u7528\u573a\u666f\u3002\n<\/div>\n<\/div>\n
\n
\n\u539f\u59cb\u95ee\u9898\u5982\u4e0b\uff1a
\n\u4e1a\u52a1\u901a\u8fc7\u4e00\u4e2a\u5927\u4e8b\u52a1\u5728\u63d2\u5165\u4e00\u6279\u975e\u5e38\u5927\u7684\u6570\u636e\uff0c\u8fd9\u4e2a\u4e8b\u52a1\u5df2\u7ecf\u6267\u884c\u4e86\u5f88\u957f\u65f6\u95f4\uff0c\u6ca1\u6709\u63d0\u4ea4\uff0c\u5982\u4f55\u77e5\u9053\u5f53\u524d\u5df2\u7ecf\u63d2\u5165\u4e86\u591a\u5c11\u6761\u6570\u636e\uff1f
\n\u4f30\u8ba1\u5f88\u5c11\u6709\u4eba\u4f1a\u60f3\u5230\u4f7f\u7528\u8bfb\u672a\u63d0\u4ea4\u9694\u79bb\u7ea7\u522b\u6765\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\u3002\u4e0d\u8fc7\u601d\u8def\u786e\u5b9e\u5f88\u65b0\u9896\uff0c\u56e0\u4e3a\u901a\u5e38\u60c5\u51b5\u4e0b\uff0c\u8bfb\u672a\u63d0\u4ea4\uff0c\u4ee5\u53ca\u4e32\u884c\u8bfb\u8fd9\u4e24\u4e2a\u9694\u79bb\u7ea7\u522b\u5728\u6b63\u5e38\u7684\u4e1a\u52a1\u573a\u666f\u4e0b\uff0c\u90fd\u4e0d\u4f1a\u4f7f\u7528\uff0c\u4f3c\u4e4e\u6570\u636e\u5e93\u5bf9\u8fd9\u4e24\u4e2a\u9694\u79bb\u7ea7\u522b\u529f\u80fd\u7684\u5b9e\u73b0\u6709\u70b9\u591a\u4f59\uff0c\u53ea\u662f\u4e3a\u4e86\u6ee1\u8db3\u4e8b\u52a1\u9694\u79bb\u6027\u7406\u8bba\u7684\u5b8c\u6574\u6027\uff0c\u5b9e\u9645\u751f\u4ea7\u73af\u5883\u51e0\u4e4e\u6ca1\u6709\u4eba\u4f1a\u7528\u3002
\n\u4e0b\u9762\u6211\u4eec\u6765\u9a8c\u8bc1\u4e00\u4e0b\uff0c\u8bfb\u672a\u63d0\u4ea4\u9694\u79bb\u7ea7\u522b\u662f\u5426\u771f\u7684\u80fd\u89e3\u51b3\u4e0a\u9762\u7684\u90a3\u4e2a\u95ee\u9898\u3002
\n\u9a8c\u8bc1\u7684MySQL\u7248\u672c\uff1a5.7.19<\/p>\n\n\n\n\n\n\n\n\n\n
session1<\/th>\nsession2<\/th>\n\u5907\u6ce8<\/th>\n<\/tr>\n<\/thead>\n
begin;<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
insert into tb values(1,\\’1\\’);<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
<\/td>\nselect * from tb;<\/td>\n\u67e5\u4e0d\u5230\u6570\u636e<\/td>\n<\/tr>\n
<\/td>\nset tx_isolation=\\’read-uncommitted\\’;<\/td>\n\u8bbe\u7f6e\u9694\u79bb\u7ea7\u522b\u4e3a\u8bfb\u672a\u63d0\u4ea4<\/td>\n<\/tr>\n
<\/td>\nselect * from tb;<\/td>\n\u67e5\u5230\u4e86session1\u672a\u63d0\u4ea4\u7684\u6570\u636e<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u7ecf\u8fc7\u9a8c\u8bc1\uff0c\u786e\u5b9e\u80fd\u591f\u901a\u8fc7\u8bbe\u7f6e\u9694\u79bb\u7ea7\u522b\u4e3a\u8bfb\u672a\u63d0\u4ea4\uff0c\u6765\u68c0\u67e5insert\u5927\u4e8b\u52a1\u7684\u8fdb\u5ea6\u3002\n<\/p><\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

\u770b\u5230\u4e00\u4e2aMySQL\u9762\u8bd5\u9898\uff0c\u5173\u4e8e\u9694\u79bb\u7ea7\u522b\uff0c\u8bfb\u672a\u63d0\u4ea4(Read uncommitted)\u7684\u4e00\u4e2a\u4f7f\u7528\u573a\u666f\u3002 \u539f\u59cb\u95ee\u9898 …<\/p>\n

MySQL\u9694\u79bb\u7ea7\u522b\u8bfb\u672a\u63d0\u4ea4(Read uncommitted)\u7684\u5999\u7528<\/span> \u67e5\u770b\u5168\u6587 »<\/a><\/p>\n","protected":false},"author":4,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"default","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":""},"categories":[90,88],"tags":[],"uagb_featured_image_src":{"full":false,"thumbnail":false,"medium":false,"medium_large":false,"large":false,"1536x1536":false,"2048x2048":false,"mailpoet_newsletter_max":false,"woocommerce_thumbnail":false,"woocommerce_single":false,"woocommerce_gallery_thumbnail":false,"shop_catalog":false,"shop_single":false,"shop_thumbnail":false},"uagb_author_info":{"display_name":"weijing","author_link":"http:\/\/www.weijing.co\/?author=4"},"uagb_comment_info":0,"uagb_excerpt":"\u770b\u5230\u4e00\u4e2aMySQL\u9762\u8bd5\u9898\uff0c\u5173\u4e8e\u9694\u79bb\u7ea7\u522b\uff0c\u8bfb\u672a\u63d0\u4ea4(Read uncommitted)\u7684\u4e00\u4e2a\u4f7f\u7528\u573a\u666f\u3002 \u539f\u59cb\u95ee\u9898…","_links":{"self":[{"href":"http:\/\/www.weijing.co\/index.php?rest_route=\/wp\/v2\/posts\/5403"}],"collection":[{"href":"http:\/\/www.weijing.co\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.weijing.co\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.weijing.co\/index.php?rest_route=\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"http:\/\/www.weijing.co\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=5403"}],"version-history":[{"count":0,"href":"http:\/\/www.weijing.co\/index.php?rest_route=\/wp\/v2\/posts\/5403\/revisions"}],"wp:attachment":[{"href":"http:\/\/www.weijing.co\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=5403"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.weijing.co\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=5403"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.weijing.co\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=5403"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}