{"id":96916,"date":"2024-10-20T13:26:17","date_gmt":"2024-10-20T05:26:17","guid":{"rendered":"https:\/\/server.hk\/cnblog\/96916\/"},"modified":"2024-10-20T13:26:18","modified_gmt":"2024-10-20T05:26:18","slug":"postgresql%e5%ae%a2%e6%88%b6%e7%ab%af%e8%99%95%e7%90%86%e4%ba%8b%e5%8b%99%e5%8a%9f%e8%83%bd%e8%a9%b3%e8%a7%a3","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/96916\/","title":{"rendered":"PostgreSQL\u5ba2\u6236\u7aef\u8655\u7406\u4e8b\u52d9\u529f\u80fd\u8a73\u89e3"},"content":{"rendered":"<h1 id=\"postgresql%e5%ae%a2%e6%88%b6%e7%ab%af%e8%99%95%e7%90%86%e4%ba%8b%e5%8b%99%e5%8a%9f%e8%83%bd%e8%a9%b3%e8%a7%a3-orqRkwZuhM\">PostgreSQL\u5ba2\u6236\u7aef\u8655\u7406\u4e8b\u52d9\u529f\u80fd\u8a73\u89e3<\/h1>\n<p>PostgreSQL\u662f\u4e00\u500b\u5f37\u5927\u7684\u958b\u6e90\u95dc\u806f\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\uff0c\u5ee3\u6cdb\u61c9\u7528\u65bc\u5404\u7a2e\u5546\u696d\u548c\u958b\u767c\u74b0\u5883\u4e2d\u3002\u5176\u4e8b\u52d9\u8655\u7406\u529f\u80fd\u662f\u5176\u6838\u5fc3\u7279\u6027\u4e4b\u4e00\uff0c\u80fd\u5920\u78ba\u4fdd\u6578\u64da\u7684\u4e00\u81f4\u6027\u548c\u5b8c\u6574\u6027\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0ePostgreSQL\u5ba2\u6236\u7aef\u5982\u4f55\u8655\u7406\u4e8b\u52d9\u529f\u80fd\uff0c\u5305\u62ec\u4e8b\u52d9\u7684\u57fa\u672c\u6982\u5ff5\u3001\u64cd\u4f5c\u4ee5\u53ca\u6700\u4f73\u5be6\u8e10\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af%e4%ba%8b%e5%8b%99%ef%bc%9f-orqRkwZuhM\">\u4ec0\u9ebc\u662f\u4e8b\u52d9\uff1f<\/h2>\n<p>\u4e8b\u52d9\u662f\u4e00\u7d44\u64cd\u4f5c\u7684\u96c6\u5408\uff0c\u9019\u4e9b\u64cd\u4f5c\u8981\u9ebc\u5168\u90e8\u6210\u529f\uff0c\u8981\u9ebc\u5168\u90e8\u5931\u6557\u3002\u9019\u4e00\u7279\u6027\u88ab\u7a31\u70baACID\uff08\u539f\u5b50\u6027\u3001\u4e00\u81f4\u6027\u3001\u9694\u96e2\u6027\u548c\u6301\u4e45\u6027\uff09\u3002\u5728PostgreSQL\u4e2d\uff0c\u4e8b\u52d9\u7684\u4e3b\u8981\u76ee\u7684\u662f\u78ba\u4fdd\u6578\u64da\u7684\u5b8c\u6574\u6027\uff0c\u907f\u514d\u56e0\u7cfb\u7d71\u6545\u969c\u6216\u5176\u4ed6\u554f\u984c\u5c0e\u81f4\u6578\u64da\u4e0d\u4e00\u81f4\u3002<\/p>\n<h2 id=\"postgresql%e4%b8%ad%e7%9a%84%e4%ba%8b%e5%8b%99%e6%93%8d%e4%bd%9c-orqRkwZuhM\">PostgreSQL\u4e2d\u7684\u4e8b\u52d9\u64cd\u4f5c<\/h2>\n<p>\u5728PostgreSQL\u4e2d\uff0c\u4e8b\u52d9\u7684\u57fa\u672c\u64cd\u4f5c\u5305\u62ec\u958b\u59cb\u4e8b\u52d9\u3001\u63d0\u4ea4\u4e8b\u52d9\u548c\u56de\u6efe\u4e8b\u52d9\u3002\u4ee5\u4e0b\u662f\u9019\u4e9b\u64cd\u4f5c\u7684\u8a73\u7d30\u8aaa\u660e\uff1a<\/p>\n<h3 id=\"%e9%96%8b%e5%a7%8b%e4%ba%8b%e5%8b%99-orqRkwZuhM\">\u958b\u59cb\u4e8b\u52d9<\/h3>\n<p>\u8981\u958b\u59cb\u4e00\u500b\u4e8b\u52d9\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0bSQL\u547d\u4ee4\uff1a<\/p>\n<pre><code>BEGIN;<\/code><\/pre>\n<p>\u9019\u689d\u547d\u4ee4\u6703\u544a\u8a34PostgreSQL\u958b\u59cb\u4e00\u500b\u65b0\u7684\u4e8b\u52d9\u3002\u6240\u6709\u5f8c\u7e8c\u7684\u6578\u64da\u64cd\u4f5c\u90fd\u5c07\u88ab\u8996\u70ba\u9019\u500b\u4e8b\u52d9\u7684\u4e00\u90e8\u5206\u3002<\/p>\n<h3 id=\"%e6%8f%90%e4%ba%a4%e4%ba%8b%e5%8b%99-orqRkwZuhM\">\u63d0\u4ea4\u4e8b\u52d9<\/h3>\n<p>\u5982\u679c\u6240\u6709\u64cd\u4f5c\u90fd\u6210\u529f\u57f7\u884c\uff0c\u5247\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\u63d0\u4ea4\u4e8b\u52d9\uff1a<\/p>\n<pre><code>COMMIT;<\/code><\/pre>\n<p>\u9019\u689d\u547d\u4ee4\u6703\u5c07\u4e8b\u52d9\u4e2d\u7684\u6240\u6709\u66f4\u6539\u6c38\u4e45\u4fdd\u5b58\u5230\u6578\u64da\u5eab\u4e2d\u3002<\/p>\n<h3 id=\"%e5%9b%9e%e6%bb%be%e4%ba%8b%e5%8b%99-orqRkwZuhM\">\u56de\u6efe\u4e8b\u52d9<\/h3>\n<p>\u5982\u679c\u5728\u4e8b\u52d9\u57f7\u884c\u904e\u7a0b\u4e2d\u767c\u751f\u932f\u8aa4\uff0c\u5247\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\u56de\u6efe\u4e8b\u52d9\uff1a<\/p>\n<pre><code>ROLLBACK;<\/code><\/pre>\n<p>\u9019\u689d\u547d\u4ee4\u6703\u64a4\u92b7\u4e8b\u52d9\u4e2d\u7684\u6240\u6709\u66f4\u6539\uff0c\u5c07\u6578\u64da\u5eab\u6062\u5fa9\u5230\u4e8b\u52d9\u958b\u59cb\u4e4b\u524d\u7684\u72c0\u614b\u3002<\/p>\n<h2 id=\"%e4%ba%8b%e5%8b%99%e7%9a%84%e9%9a%94%e9%9b%a2%e7%b4%9a%e5%88%a5-orqRkwZuhM\">\u4e8b\u52d9\u7684\u9694\u96e2\u7d1a\u5225<\/h2>\n<p>PostgreSQL\u652f\u6301\u591a\u7a2e\u4e8b\u52d9\u9694\u96e2\u7d1a\u5225\uff0c\u9019\u4e9b\u7d1a\u5225\u6c7a\u5b9a\u4e86\u4e8b\u52d9\u4e4b\u9593\u7684\u53ef\u898b\u6027\u548c\u76f8\u4e92\u5f71\u97ff\u3002\u4e3b\u8981\u7684\u9694\u96e2\u7d1a\u5225\u5305\u62ec\uff1a<\/p>\n<ul>\n<li><strong>\u8b80\u672a\u63d0\u4ea4\uff08Read Uncommitted\uff09<\/strong>\uff1a\u5141\u8a31\u4e8b\u52d9\u8b80\u53d6\u672a\u63d0\u4ea4\u7684\u66f4\u6539\u3002<\/li>\n<li><strong>\u8b80\u5df2\u63d0\u4ea4\uff08Read Committed\uff09<\/strong>\uff1a\u4e8b\u52d9\u53ea\u80fd\u8b80\u53d6\u5df2\u63d0\u4ea4\u7684\u66f4\u6539\u3002<\/li>\n<li><strong>\u53ef\u91cd\u8907\u8b80\u53d6\uff08Repeatable Read\uff09<\/strong>\uff1a\u5728\u540c\u4e00\u4e8b\u52d9\u4e2d\u591a\u6b21\u8b80\u53d6\u76f8\u540c\u7684\u6578\u64da\u5c07\u8fd4\u56de\u76f8\u540c\u7684\u7d50\u679c\u3002<\/li>\n<li><strong>\u4e32\u884c\u5316\uff08Serializable\uff09<\/strong>\uff1a\u63d0\u4f9b\u6700\u9ad8\u7684\u9694\u96e2\u7d1a\u5225\uff0c\u78ba\u4fdd\u4e8b\u52d9\u7684\u57f7\u884c\u7d50\u679c\u8207\u67d0\u500b\u4e32\u884c\u57f7\u884c\u7684\u7d50\u679c\u76f8\u540c\u3002<\/li>\n<\/ul>\n<p>\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\u8a2d\u7f6e\u4e8b\u52d9\u7684\u9694\u96e2\u7d1a\u5225\uff1a<\/p>\n<pre><code>SET TRANSACTION ISOLATION LEVEL ;<\/code><\/pre>\n<h2 id=\"%e6%9c%80%e4%bd%b3%e5%af%a6%e8%b8%90-orqRkwZuhM\">\u6700\u4f73\u5be6\u8e10<\/h2>\n<p>\u5728\u4f7f\u7528PostgreSQL\u9032\u884c\u4e8b\u52d9\u8655\u7406\u6642\uff0c\u9075\u5faa\u4e00\u4e9b\u6700\u4f73\u5be6\u8e10\u53ef\u4ee5\u63d0\u9ad8\u6578\u64da\u7684\u5b89\u5168\u6027\u548c\u6027\u80fd\uff1a<\/p>\n<ul>\n<li>\u76e1\u91cf\u7e2e\u77ed\u4e8b\u52d9\u7684\u6301\u7e8c\u6642\u9593\uff0c\u4ee5\u6e1b\u5c11\u9396\u5b9a\u548c\u8cc7\u6e90\u7af6\u722d\u3002<\/li>\n<li>\u5728\u4e8b\u52d9\u4e2d\u907f\u514d\u57f7\u884c\u9577\u6642\u9593\u904b\u884c\u7684\u67e5\u8a62\uff0c\u9019\u53ef\u80fd\u6703\u5c0e\u81f4\u5176\u4ed6\u4e8b\u52d9\u7684\u5ef6\u9072\u3002<\/li>\n<li>\u5b9a\u671f\u6aa2\u67e5\u548c\u512a\u5316\u6578\u64da\u5eab\u6027\u80fd\uff0c\u4ee5\u78ba\u4fdd\u4e8b\u52d9\u8655\u7406\u7684\u9ad8\u6548\u6027\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-orqRkwZuhM\">\u7e3d\u7d50<\/h2>\n<p>PostgreSQL\u7684\u4e8b\u52d9\u8655\u7406\u529f\u80fd\u662f\u5176\u5f37\u5927\u7279\u6027\u7684\u6838\u5fc3\u4e4b\u4e00\uff0c\u80fd\u5920\u78ba\u4fdd\u6578\u64da\u7684\u4e00\u81f4\u6027\u548c\u5b8c\u6574\u6027\u3002\u901a\u904e\u6b63\u78ba\u4f7f\u7528\u4e8b\u52d9\u7684\u958b\u59cb\u3001\u63d0\u4ea4\u548c\u56de\u6efe\u64cd\u4f5c\uff0c\u4ee5\u53ca\u9078\u64c7\u5408\u9069\u7684\u9694\u96e2\u7d1a\u5225\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u6709\u6548\u5730\u7ba1\u7406\u6578\u64da\u5eab\u4e2d\u7684\u6578\u64da\u3002\u82e5\u60a8\u5c0d\u65bc\u5982\u4f55\u5728\u9999\u6e2f\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u74b0\u5883\u4e2d\u90e8\u7f72PostgreSQL\u6709\u8208\u8da3\uff0c\u8acb\u53c3\u8003\u6211\u5011\u7684\u76f8\u95dc\u8cc7\u6e90\u4ee5\u7372\u53d6\u66f4\u591a\u4fe1\u606f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6df1\u5165\u63a2\u8a0ePostgreSQL\u5ba2\u6236\u7aef\u7684\u4e8b\u52d9\u8655\u7406\u529f\u80fd\uff0c\u4e86\u89e3\u5982\u4f55\u6709\u6548\u7ba1\u7406\u548c\u63a7\u5236\u6578\u64da\u5eab\u4e8b\u52d9\u3002<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-96916","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/96916","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"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=96916"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/96916\/revisions"}],"predecessor-version":[{"id":96917,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/96916\/revisions\/96917"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=96916"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=96916"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=96916"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}