{"id":41626,"date":"2023-11-11T20:25:54","date_gmt":"2023-07-31T12:07:29","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e5%9c%a8postgresql%e4%b8%ad%e7%9a%84%e8%bf%9e%e6%8e%a5%e8%b6%85%e6%97%b6\/"},"modified":"2024-05-04T08:32:56","modified_gmt":"2024-05-04T00:32:56","slug":"%e5%9c%a8postgresql%e4%b8%ad%e7%9a%84%e8%bf%9e%e6%8e%a5%e8%b6%85%e6%97%b6","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e5%9c%a8postgresql%e4%b8%ad%e7%9a%84%e8%bf%9e%e6%8e%a5%e8%b6%85%e6%97%b6\/","title":{"rendered":"\u5728Postgresql\u4e2d\u7684\u8fde\u63a5\u8d85\u65f6"},"content":{"rendered":"<h2>\u75c5\u5fb5<\/h2>\n<p>\u5f53\u5c06pgpool-II\u7684\u6bcf\u4e2a\u7f51\u7edc\u63a5\u53e3\u5173\u95ed\u65f6\uff0c\u5373\u4f7f\u8bbe\u7f6e\u4e86connect_timeout\uff0c\u53ea\u6709\u5728\u9996\u6b21\u67e5\u8be2\u6267\u884c\u65f6\u624d\u4f1a\u8fd4\u56de\u8d85\u65f6\u9519\u8bef\u7684\u73b0\u8c61\uff0c\u5bf9\u6b64\u63d0\u4f9b\u5904\u7406\u65b9\u6cd5\uff1ahttps:\/\/godoc.org\/github.com\/lib\/pq<\/p>\n<h2>\u5f53\u75c5\u75c7\u53d1\u4f5c\u65f6\u7684\u73af\u5883<\/h2>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">golang: 1.7\u7cfb<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u30c9\u30e9\u30a4\u30d0: lib\/pq<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">pgpool-II: 3.6.1<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">PostgreSQL: 9.5<\/ul>\n<h2>\u5e94\u5bf9\u7684\u65b9\u6cd5<\/h2>\n<p>\u5c06golang\u5347\u7ea7\u52301.8\u7248\u672c\u5e76\u4f7f\u7528QueryRowContext\u3002\u6709\u5173\u8be6\u7ec6\u4fe1\u606f\uff0c\u8bf7\u8bbf\u95eehttps:\/\/golang.org\/pkg\/database\/sql\/#DB.QueryRowContext\u3002<\/p>\n<p>\u6709\u53e6\u5916\u4e00\u500bContext\u7248\u672c\u7684QueryRow\uff0c\u8acb\u4f7f\u7528\u90a3\u500b\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"c\">\/\/\u524d\u306e\u51e6\u7406<\/span>\r\n<span class=\"c\">\/\/Timeout Context\u3092\u4f5c\u6210<\/span>\r\n<span class=\"n\">ctx<\/span><span class=\"p\">,<\/span> <span class=\"n\">cancel<\/span> <span class=\"o\">:=<\/span> <span class=\"n\">context<\/span><span class=\"o\">.<\/span><span class=\"n\">WithTimeout<\/span><span class=\"p\">(<\/span><span class=\"n\">context<\/span><span class=\"o\">.<\/span><span class=\"n\">Background<\/span><span class=\"p\">(),<\/span> <span class=\"n\">time<\/span><span class=\"o\">.<\/span><span class=\"n\">Second<\/span><span class=\"p\">)<\/span>\r\n<span class=\"k\">defer<\/span> <span class=\"n\">cancel<\/span><span class=\"p\">()<\/span>\r\n\r\n<span class=\"n\">errChan<\/span> <span class=\"o\">:=<\/span> <span class=\"nb\">make<\/span><span class=\"p\">(<\/span><span class=\"k\">chan<\/span> <span class=\"kt\">error<\/span><span class=\"p\">,<\/span> <span class=\"m\">1<\/span><span class=\"p\">)<\/span>\r\n\r\n<span class=\"n\">query<\/span> <span class=\"o\">:=<\/span> <span class=\"s\">\"select name from user limit 1\"<\/span>\r\n<span class=\"k\">var<\/span> <span class=\"n\">name<\/span> <span class=\"kt\">string<\/span>\r\n\r\n<span class=\"k\">go<\/span> <span class=\"k\">func<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n <span class=\"n\">errChan<\/span> <span class=\"o\">&lt;-<\/span> <span class=\"n\">db<\/span><span class=\"o\">.<\/span><span class=\"n\">QueryRowContext<\/span><span class=\"p\">(<\/span><span class=\"n\">ctx<\/span><span class=\"p\">,<\/span> <span class=\"n\">query<\/span><span class=\"p\">)<\/span><span class=\"o\">.<\/span><span class=\"n\">Scan<\/span><span class=\"p\">(<\/span><span class=\"o\">&amp;<\/span><span class=\"n\">name<\/span><span class=\"p\">)<\/span>\r\n<span class=\"p\">}()<\/span>\r\n\r\n<span class=\"k\">select<\/span> <span class=\"p\">{<\/span>\r\n<span class=\"k\">case<\/span> <span class=\"o\">&lt;-<\/span><span class=\"n\">ctx<\/span><span class=\"o\">.<\/span><span class=\"n\">Done<\/span><span class=\"p\">()<\/span><span class=\"o\">:<\/span>\r\n    <span class=\"n\">err<\/span> <span class=\"o\">=<\/span> <span class=\"n\">ctx<\/span><span class=\"o\">.<\/span><span class=\"n\">Err<\/span><span class=\"p\">()<\/span>\r\n    <span class=\"k\">break<\/span>\r\n<span class=\"k\">case<\/span> <span class=\"n\">err<\/span> <span class=\"o\">=<\/span> <span class=\"o\">&lt;-<\/span><span class=\"n\">errChan<\/span><span class=\"o\">:<\/span>\r\n    <span class=\"k\">break<\/span>\r\n<span class=\"p\">}<\/span>\r\n<span class=\"c\">\/\/\u7d9a\u304d\u306e\u51e6\u7406<\/span>\r\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>\u75c5\u5fb5 \u5f53\u5c06pgpool-II\u7684\u6bcf\u4e2a\u7f51\u7edc\u63a5\u53e3\u5173\u95ed\u65f6\uff0c\u5373\u4f7f\u8bbe\u7f6e\u4e86connect_timeout\uff0c\u53ea\u6709\u5728\u9996\u6b21\u67e5\u8be2\u6267\u884c [&hellip;]<\/p>\n","protected":false},"author":7,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-41626","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>\u5728Postgresql\u4e2d\u7684\u8fde\u63a5\u8d85\u65f6 - Blog - Silicon Cloud<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/zh\/blog\/\u5728postgresql\u4e2d\u7684\u8fde\u63a5\u8d85\u65f6\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u5728Postgresql\u4e2d\u7684\u8fde\u63a5\u8d85\u65f6\" \/>\n<meta property=\"og:description\" content=\"\u75c5\u5fb5 \u5f53\u5c06pgpool-II\u7684\u6bcf\u4e2a\u7f51\u7edc\u63a5\u53e3\u5173\u95ed\u65f6\uff0c\u5373\u4f7f\u8bbe\u7f6e\u4e86connect_timeout\uff0c\u53ea\u6709\u5728\u9996\u6b21\u67e5\u8be2\u6267\u884c [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/\u5728postgresql\u4e2d\u7684\u8fde\u63a5\u8d85\u65f6\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - Silicon Cloud\" \/>\n<meta property=\"article:published_time\" content=\"2023-07-31T12:07:29+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-05-04T00:32:56+00:00\" \/>\n<meta name=\"author\" content=\"\u79d1, \u9896\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u4f5c\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"\u79d1, \u9896\" \/>\n<script type=\"application\/ld+json\" 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