{"id":20785,"date":"2024-01-02T05:54:23","date_gmt":"2024-01-02T05:54:23","guid":{"rendered":"https:\/\/server.hk\/blog\/20785\/"},"modified":"2024-11-14T10:38:43","modified_gmt":"2024-11-14T02:38:43","slug":"postgresql-command-drop-foreign-data-wrapper","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/20785\/","title":{"rendered":"PostgreSQL \u547d\u4ee4\uff1aDROP FOREIGN DATA WRAPPER"},"content":{"rendered":"<h1 id=\"postgresql-command-drop-foreign-data-wrapper-UgMQXgqcBy\">PostgreSQL \u547d\u4ee4\uff1aDROP FOREIGN DATA WRAPPER<\/h1>\n<p>PostgreSQL \u662f\u4e00\u500b\u529f\u80fd\u5f37\u5927\u7684\u958b\u6e90\u95dc\u806f\u5f0f\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\uff0c\u63d0\u4f9b\u4e86\u8c50\u5bcc\u7684\u529f\u80fd\u548c\u7279\u6027\u3002\u5176\u4e2d\u4e00\u500b\u986f\u8457\u7684\u529f\u80fd\u662f\u80fd\u5920\u4f7f\u7528\u5916\u90e8\u6578\u64da\u5c01\u88dd\u5668\uff08Foreign Data Wrappers\uff09\uff0c\u9019\u4f7f\u5f97 PostgreSQL \u80fd\u5920\u8a2a\u554f\u5b58\u5132\u5728\u5916\u90e8\u7cfb\u7d71\u4e2d\u7684\u6578\u64da\u3002\u5728\u672c\u6587\u4e2d\uff0c\u6211\u5011\u5c07\u63a2\u7d22 PostgreSQL \u547d\u4ee4 <code>DROP FOREIGN DATA WRAPPER<\/code> \u4e26\u6df1\u5165\u4e86\u89e3\u5176\u5728\u7ba1\u7406\u5916\u90e8\u6578\u64da\u5c01\u88dd\u5668\u65b9\u9762\u7684\u91cd\u8981\u6027\u3002<\/p>\n<h2 id=\"understanding-foreign-data-wrappers-UgMQXgqcBy\">\u7406\u89e3\u5916\u90e8\u6578\u64da\u5c01\u88dd\u5668<\/h2>\n<p>\u5728 PostgreSQL \u4e2d\uff0c\u5916\u90e8\u6578\u64da\u5c01\u88dd\u5668\uff08FDWs\uff09\u4f7f\u6578\u64da\u5eab\u80fd\u5920\u8207\u4f4d\u65bc PostgreSQL \u4f3a\u670d\u5668\u4e4b\u5916\u7684\u6578\u64da\u6e90\u9032\u884c\u4ea4\u4e92\u3002\u9019\u4e9b\u6578\u64da\u6e90\u53ef\u4ee5\u5305\u62ec\u5176\u4ed6\u6578\u64da\u5eab\u3001\u6587\u4ef6\u7cfb\u7d71\u3001Web \u670d\u52d9\u6216\u4efb\u4f55\u80fd\u5920\u63d0\u4f9b\u6578\u64da\u8a2a\u554f\u7684\u7cfb\u7d71\u3002FDWs \u5145\u7576 PostgreSQL \u8207\u9019\u4e9b\u5916\u90e8\u7cfb\u7d71\u4e4b\u9593\u7684\u6a4b\u6a11\uff0c\u5be6\u73fe\u6578\u64da\u7684\u7121\u7e2b\u6574\u5408\u548c\u67e5\u8a62\u3002<\/p>\n<p>PostgreSQL \u63d0\u4f9b\u4e86\u591a\u500b\u5167\u5efa\u7684 FDWs\uff0c\u4f8b\u5982 <code>postgres_fdw<\/code> \u7528\u65bc\u8a2a\u554f\u9060\u7a0b PostgreSQL \u6578\u64da\u5eab\uff0c\u4ee5\u53ca <code>file_fdw<\/code> \u7528\u65bc\u5f9e\u6587\u4ef6\u7cfb\u7d71\u8b80\u53d6\u6587\u4ef6\u3002\u6b64\u5916\uff0c\u9084\u6709\u8a31\u591a\u7b2c\u4e09\u65b9 FDWs \u53ef\u4f9b\u4f7f\u7528\uff0c\u64f4\u5c55\u4e86 PostgreSQL \u8207\u5404\u7a2e\u6578\u64da\u6e90\u9032\u884c\u4ea4\u4e92\u7684\u80fd\u529b\u3002<\/p>\n<h2 id=\"the-drop-foreign-data-wrapper-command-UgMQXgqcBy\">DROP FOREIGN DATA WRAPPER \u547d\u4ee4<\/h2>\n<p>\u5728 PostgreSQL \u4e2d\uff0c<code>DROP FOREIGN DATA WRAPPER<\/code> \u547d\u4ee4\u5141\u8a31\u60a8\u5f9e\u6578\u64da\u5eab\u4e2d\u79fb\u9664\u5916\u90e8\u6578\u64da\u5c01\u88dd\u5668\u3002\u7576\u60a8\u57f7\u884c\u6b64\u547d\u4ee4\u6642\uff0cPostgreSQL \u5c07\u522a\u9664\u6307\u5b9a\u7684\u5916\u90e8\u6578\u64da\u5c01\u88dd\u5668\u4ee5\u53ca\u6240\u6709\u76f8\u95dc\u5c0d\u8c61\uff0c\u5982\u5916\u90e8\u4f3a\u670d\u5668\u3001\u4f7f\u7528\u8005\u6620\u5c04\u548c\u5916\u90e8\u8868\u3002<\/p>\n<p><code>DROP FOREIGN DATA WRAPPER<\/code> \u547d\u4ee4\u7684\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>DROP FOREIGN DATA WRAPPER [ IF EXISTS ] <i>foreign_data_wrapper_name<\/i>;\r\n<\/code><\/pre>\n<p>\u9019\u88e1\uff0c<code>foreign_data_wrapper_name<\/code> \u6307\u7684\u662f\u60a8\u8981\u79fb\u9664\u7684\u5916\u90e8\u6578\u64da\u5c01\u88dd\u5668\u7684\u540d\u7a31\u3002\u53ef\u9078\u7684 <code>IF EXISTS<\/code> \u5b50\u53e5\u5141\u8a31\u60a8\u907f\u514d\u5982\u679c\u6307\u5b9a\u7684\u5916\u90e8\u6578\u64da\u5c01\u88dd\u5668\u4e0d\u5b58\u5728\u6642\u51fa\u73fe\u932f\u8aa4\u3002<\/p>\n<h2 id=\"example-UgMQXgqcBy\">\u793a\u4f8b<\/h2>\n<p>\u8b93\u6211\u5011\u8209\u500b\u4f8b\u5b50\uff0c\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u540d\u70ba <code>my_fdw<\/code> \u7684\u5916\u90e8\u6578\u64da\u5c01\u88dd\u5668\uff0c\u9023\u63a5\u5230\u4e00\u500b\u9060\u7a0b\u7684 MySQL \u6578\u64da\u5eab\u3002\u8981\u522a\u9664\u9019\u500b\u5916\u90e8\u6578\u64da\u5c01\u88dd\u5668\uff0c\u6211\u5011\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\uff1a<\/p>\n<pre><code>DROP FOREIGN DATA WRAPPER my_fdw;\r\n<\/code><\/pre>\n<p>\u57f7\u884c\u6b64\u547d\u4ee4\u5c07\u5f9e PostgreSQL \u6578\u64da\u5eab\u4e2d\u522a\u9664 <code>my_fdw<\/code> \u5916\u90e8\u6578\u64da\u5c01\u88dd\u5668\u4ee5\u53ca\u6240\u6709\u5176\u76f8\u95dc\u7684\u5c0d\u8c61\u3002<\/p>\n<h2 id=\"conclusion-UgMQXgqcBy\">\u7d50\u8ad6<\/h2>\n<p>\u5728 PostgreSQL \u4e2d\uff0c<code>DROP FOREIGN DATA WRAPPER<\/code> \u547d\u4ee4\u63d0\u4f9b\u4e86\u4e00\u500b\u65b9\u4fbf\u7684\u65b9\u6cd5\u4f86\u5f9e\u6578\u64da\u5eab\u4e2d\u522a\u9664\u5916\u90e8\u6578\u64da\u5c01\u88dd\u5668\u53ca\u5176\u76f8\u95dc\u7684\u5c0d\u8c61\u3002\u901a\u904e\u4f7f\u7528\u6b64\u547d\u4ee4\uff0c\u60a8\u53ef\u4ee5\u8f15\u9b06\u7ba1\u7406\u548c\u7dad\u8b77 PostgreSQL \u74b0\u5883\u4e2d\u7684\u5916\u90e8\u6578\u64da\u5c01\u88dd\u5668\u3002<\/p>\n<p>\u5982\u9700\u4e86\u89e3\u66f4\u591a\u6709\u95dc PostgreSQL \u53ca\u5176\u529f\u80fd\u7684\u8cc7\u8a0a\uff0c\u60a8\u53ef\u4ee5\u8a2a\u554f <a href=\"https:\/\/server.hk\">Server.HK<\/a> \u7db2\u7ad9\u3002Server.HK \u63d0\u4f9b\u53ef\u9760\u4e14\u9ad8\u6027\u80fd\u7684 VPS \u8a17\u7ba1\u89e3\u6c7a\u65b9\u6848\uff0c\u78ba\u4fdd\u60a8\u7684 PostgreSQL \u6578\u64da\u5eab\u80fd\u5920\u767c\u63ee\u6700\u4f73\u6027\u80fd\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>PostgreSQL \u547d\u4ee4\uff1aDR&#46;&#46;&#46;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4924],"tags":[],"class_list":["post-20785","post","type-post","status-publish","format-standard","hentry","category-setup-tutorials"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/20785","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"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=20785"}],"version-history":[{"count":2,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/20785\/revisions"}],"predecessor-version":[{"id":24314,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/20785\/revisions\/24314"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=20785"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=20785"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=20785"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}