{"id":41367,"date":"2023-05-06T08:18:50","date_gmt":"2023-10-12T19:49:54","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/postgresql%e7%9a%84%e5%a4%9a%e5%88%97\/"},"modified":"2024-04-30T02:51:38","modified_gmt":"2024-04-29T18:51:38","slug":"postgresql%e7%9a%84%e5%a4%9a%e5%88%97","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/postgresql%e7%9a%84%e5%a4%9a%e5%88%97\/","title":{"rendered":"PostgreSQL\u7684\u591a\u5217"},"content":{"rendered":"<h1>\u521b\u5efa\u590d\u5408\u7d22\u5f15\u65f6\u7684\u60c5\u51b5<\/h1>\n<h2>\u73af\u5883<\/h2>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">Rails<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">PostgreSQL<\/ul>\n<h2>\u8bbe\u7f6e<\/h2>\n<p>\u5728 migration \u6587\u4ef6\u4e2d\u6dfb\u52a0\u4ee5\u4e0b\u5185\u5bb9\uff1a<\/p>\n<p>add_index :xxxxxxxxxxx_xxxxxxx, [:xxxxxxxx_id, :xxxxxxxxxx_id]<\/p>\n<p>\u8fd9\u662f\u5728 Rails \u4e2d\u5e38\u89c1\u7684\u7d22\u5f15\u8ffd\u52a0\u8bbe\u7f6e\u3002<\/p>\n<h2>\u8fc1\u79fb\u540e\u7684\u63cf\u8ff0<\/h2>\n<pre class=\"post-pre\"><code>bundle exec rake db:migrate:up VERSION=xxxxxxxxxxxxxxxxxxxxxxxxx\r\n<\/code><\/pre>\n<p>\u4f7f\u7528\u4ee5\u4e0a\u547d\u4ee4\u6267\u884cRails\u7684\u8fc1\u79fb\u3002<br \/>\n\u6ca1\u6709\u51fa\u73b0\u7279\u522b\u7684\u9519\u8bef\uff0c\u8fc1\u79fb\u987a\u5229\u5b8c\u6210\u3002<\/p>\n<h2>\u8bf7\u786e\u8ba4\u7d22\u5f15\u662f\u5426\u5df2\u7ecf\u6210\u529f\u521b\u5efa\u3002<\/h2>\n<pre class=\"post-pre\"><code>SELECT tablename, indexname FROM pg_indexes;\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code>select * from pg_indexes where indexname = '\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u540d';\r\n<\/code><\/pre>\n<p>\u6267\u884c\u4e0a\u8ff0\u547d\u4ee4\u540e\uff0c\u672a\u663e\u793a\u6dfb\u52a0\u7684\u7d22\u5f15\u3002<\/p>\n<h2>\u89e3\u51b3\u65b9\u6848 (ji\u011b ju\u00e9 \u00e0n)<\/h2>\n<p>\u636e\u53d1\u73b0\uff0cPostgreSQL\u7684\u6807\u8bc6\u7b26\u957f\u5ea6\u9650\u5236\u4e3a63\u4e2a\u5b57\u8282\u3002<br \/>\n\u5b9e\u9645\u751f\u6210\u7684\u5b57\u7b26\u6570\u8d85\u51fa\u4e86\u8fd9\u4e2a\u9650\u5236\u3002<\/p>\n<p>\u901a\u8fc7\u6b64\u94fe\u63a5\u53ef\u4ee5\u627e\u5230\u6709\u5173PostgreSQL\u7684SQL\u8bed\u6cd5\u548c\u8bcd\u6cd5\u7684\u8be6\u7ec6\u6587\u6863\u3002<\/p>\n<p>\u8fd9\u6b21\u751f\u6210\u8868\u540d\u548c\u5217\u540d\u65f6\u78b0\u5de7\u51fa\u9519\u4e86\uff0c\u65e0\u6cd5\u6210\u529f\u751f\u6210\u3002\u5e0c\u671b\u5728\u6267\u884cmigrate\u65f6\u51fa\u73b0\u9519\u8bef\u6216\u5931\u8d25\u3002\u8bf7\u4f7f\u7528\u9009\u9879\u6307\u5b9a:name\uff0c\u786e\u4fdd\u572863\u4e2a\u5b57\u8282\u4ee5\u5185\u3002<\/p>\n<pre class=\"post-pre\"><code>add_index :xxxxxxxxxxx_xxxxxxx, [:xxxxxxxx_id, :xxxxxxxxxx_id], :name =&gt; 'original_name'\r\n\r\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>\u521b\u5efa\u590d\u5408\u7d22\u5f15\u65f6\u7684\u60c5\u51b5 \u73af\u5883 Rails &nbsp; PostgreSQL \u8bbe\u7f6e \u5728 migration \u6587\u4ef6 [&hellip;]<\/p>\n","protected":false},"author":12,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-41367","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>PostgreSQL\u7684\u591a\u5217 - 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\/postgresql\u7684\u591a\u5217\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"PostgreSQL\u7684\u591a\u5217\" \/>\n<meta property=\"og:description\" content=\"\u521b\u5efa\u590d\u5408\u7d22\u5f15\u65f6\u7684\u60c5\u51b5 \u73af\u5883 Rails &nbsp; 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