{"id":96868,"date":"2024-10-20T13:02:16","date_gmt":"2024-10-20T05:02:16","guid":{"rendered":"https:\/\/server.hk\/cnblog\/96868\/"},"modified":"2024-10-20T13:02:17","modified_gmt":"2024-10-20T05:02:17","slug":"postgresql-hv006-fdw%e7%84%a1%e6%95%88%e6%95%b8%e6%93%9a%e9%a1%9e%e5%9e%8b%e6%8f%8f%e8%bf%b0%e7%ac%a6-%e6%8a%a5%e9%94%99-%e6%95%85%e9%9a%9c%e4%bf%ae%e5%a4%8d-%e8%bf%9c%e7%a8%8b%e5%a4%84%e7%90%86","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/96868\/","title":{"rendered":"PostgreSQL HV006: fdw\u7121\u6548\u6578\u64da\u985e\u578b\u63cf\u8ff0\u7b26 \u62a5\u9519 \u6545\u969c\u4fee\u590d \u8fdc\u7a0b\u5904\u7406"},"content":{"rendered":"<h1 id=\"postgresql-hv006-fdw%e7%84%a1%e6%95%88%e6%95%b8%e6%93%9a%e9%a1%9e%e5%9e%8b%e6%8f%8f%e8%bf%b0%e7%ac%a6%e5%a0%b1%e9%8c%af%e6%95%85%e9%9a%9c%e4%bf%ae%e5%be%a9%e9%81%a0%e7%a8%8b%e8%99%95%e7%90%86-HDPXsEiEQk\">PostgreSQL HV006: fdw\u7121\u6548\u6578\u64da\u985e\u578b\u63cf\u8ff0\u7b26\u5831\u932f\u6545\u969c\u4fee\u5fa9\u9060\u7a0b\u8655\u7406<\/h1>\n<p>\u5728\u4f7f\u7528PostgreSQL\u9032\u884c\u6578\u64da\u5eab\u7ba1\u7406\u6642\uff0c\u958b\u767c\u8005\u548c\u7cfb\u7d71\u7ba1\u7406\u54e1\u53ef\u80fd\u6703\u9047\u5230\u5404\u7a2e\u932f\u8aa4\u548c\u554f\u984c\u3002\u5176\u4e2d\uff0c&#8221;HV006: fdw\u7121\u6548\u6578\u64da\u985e\u578b\u63cf\u8ff0\u7b26&#8221;\u662f\u4e00\u500b\u5e38\u898b\u7684\u932f\u8aa4\uff0c\u7279\u5225\u662f\u5728\u4f7f\u7528\u5916\u90e8\u6578\u64da\u5305\uff08Foreign Data Wrapper, FDW\uff09\u6642\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e\u6b64\u932f\u8aa4\u7684\u6210\u56e0\u3001\u5f71\u97ff\u4ee5\u53ca\u5982\u4f55\u9032\u884c\u6545\u969c\u4fee\u5fa9\u548c\u9060\u7a0b\u8655\u7406\u3002<\/p>\n<h2 id=\"%e9%8c%af%e8%aa%a4%e6%a6%82%e8%bf%b0-HDPXsEiEQk\">\u932f\u8aa4\u6982\u8ff0<\/h2>\n<p>\u7576\u4f7f\u7528FDW\u9023\u63a5\u5230\u5916\u90e8\u6578\u64da\u6e90\u6642\uff0cPostgreSQL\u9700\u8981\u6b63\u78ba\u8b58\u5225\u548c\u8655\u7406\u6578\u64da\u985e\u578b\u3002\u5982\u679c\u51fa\u73fe&#8221;HV006: fdw\u7121\u6548\u6578\u64da\u985e\u578b\u63cf\u8ff0\u7b26&#8221;\u7684\u932f\u8aa4\uff0c\u9019\u901a\u5e38\u610f\u5473\u8457PostgreSQL\u7121\u6cd5\u6b63\u78ba\u89e3\u6790\u5916\u90e8\u6578\u64da\u6e90\u7684\u6578\u64da\u985e\u578b\u3002\u9019\u53ef\u80fd\u662f\u7531\u65bc\u6578\u64da\u985e\u578b\u4e0d\u5339\u914d\u3001FDW\u914d\u7f6e\u932f\u8aa4\u6216\u5916\u90e8\u6578\u64da\u6e90\u7684\u554f\u984c\u6240\u5c0e\u81f4\u7684\u3002<\/p>\n<h2 id=\"%e9%8c%af%e8%aa%a4%e6%88%90%e5%9b%a0-HDPXsEiEQk\">\u932f\u8aa4\u6210\u56e0<\/h2>\n<ul>\n<li><strong>\u6578\u64da\u985e\u578b\u4e0d\u5339\u914d\uff1a<\/strong>\u7576PostgreSQL\u5617\u8a66\u5c07\u5916\u90e8\u6578\u64da\u6e90\u7684\u6578\u64da\u985e\u578b\u6620\u5c04\u5230\u672c\u5730\u6578\u64da\u985e\u578b\u6642\uff0c\u5982\u679c\u5169\u8005\u4e0d\u517c\u5bb9\uff0c\u5c31\u6703\u51fa\u73fe\u6b64\u932f\u8aa4\u3002<\/li>\n<li><strong>FDW\u914d\u7f6e\u932f\u8aa4\uff1a<\/strong>\u5982\u679cFDW\u7684\u914d\u7f6e\u4e0d\u6b63\u78ba\uff0c\u4f8b\u5982\u672a\u6b63\u78ba\u8a2d\u7f6e\u5916\u90e8\u8868\u7684\u6578\u64da\u985e\u578b\uff0c\u5247\u53ef\u80fd\u5c0e\u81f4\u6b64\u932f\u8aa4\u3002<\/li>\n<li><strong>\u5916\u90e8\u6578\u64da\u6e90\u554f\u984c\uff1a<\/strong>\u5982\u679c\u5916\u90e8\u6578\u64da\u6e90\u7684\u7d50\u69cb\u767c\u751f\u8b8a\u5316\uff0c\u4f8b\u5982\u6578\u64da\u985e\u578b\u88ab\u4fee\u6539\u6216\u522a\u9664\uff0cPostgreSQL\u5c07\u7121\u6cd5\u6b63\u78ba\u8b80\u53d6\u6578\u64da\u3002<\/li>\n<\/ul>\n<h2 id=\"%e6%95%85%e9%9a%9c%e4%bf%ae%e5%be%a9%e6%ad%a5%e9%a9%9f-HDPXsEiEQk\">\u6545\u969c\u4fee\u5fa9\u6b65\u9a5f<\/h2>\n<p>\u8981\u4fee\u5fa9&#8221;HV006: fdw\u7121\u6548\u6578\u64da\u985e\u578b\u63cf\u8ff0\u7b26&#8221;\u932f\u8aa4\uff0c\u53ef\u4ee5\u6309\u7167\u4ee5\u4e0b\u6b65\u9a5f\u9032\u884c\uff1a<\/p>\n<h3 id=\"1-%e6%aa%a2%e6%9f%a5fdw%e9%85%8d%e7%bd%ae-HDPXsEiEQk\">1. \u6aa2\u67e5FDW\u914d\u7f6e<\/h3>\n<p>\u9996\u5148\uff0c\u6aa2\u67e5FDW\u7684\u914d\u7f6e\u662f\u5426\u6b63\u78ba\u3002\u4f7f\u7528\u4ee5\u4e0bSQL\u67e5\u8a62\u4f86\u67e5\u770b\u5916\u90e8\u8868\u7684\u5b9a\u7fa9\uff1a<\/p>\n<pre><code>SELECT * FROM information_schema.foreign_tables WHERE table_name = 'your_foreign_table_name';<\/code><\/pre>\n<p>\u78ba\u4fdd\u6240\u6709\u6578\u64da\u985e\u578b\u90fd\u6b63\u78ba\u6620\u5c04\u3002\u5982\u679c\u767c\u73fe\u4e0d\u5339\u914d\uff0c\u8acb\u6839\u64da\u5916\u90e8\u6578\u64da\u6e90\u7684\u5be6\u969b\u7d50\u69cb\u9032\u884c\u8abf\u6574\u3002<\/p>\n<h3 id=\"2-%e9%a9%97%e8%ad%89%e5%a4%96%e9%83%a8%e6%95%b8%e6%93%9a%e6%ba%90-HDPXsEiEQk\">2. \u9a57\u8b49\u5916\u90e8\u6578\u64da\u6e90<\/h3>\n<p>\u6aa2\u67e5\u5916\u90e8\u6578\u64da\u6e90\u7684\u7d50\u69cb\uff0c\u78ba\u4fdd\u5176\u6578\u64da\u985e\u578b\u8207PostgreSQL\u4e2d\u7684\u5b9a\u7fa9\u76f8\u7b26\u3002\u53ef\u4ee5\u4f7f\u7528\u76f8\u61c9\u7684\u67e5\u8a62\u5de5\u5177\u6216\u547d\u4ee4\u4f86\u6aa2\u67e5\u5916\u90e8\u6578\u64da\u6e90\u7684\u7d50\u69cb\u3002<\/p>\n<h3 id=\"3-%e6%9b%b4%e6%96%b0%e6%95%b8%e6%93%9a%e9%a1%9e%e5%9e%8b%e6%98%a0%e5%b0%84-HDPXsEiEQk\">3. \u66f4\u65b0\u6578\u64da\u985e\u578b\u6620\u5c04<\/h3>\n<p>\u5982\u679c\u767c\u73fe\u6578\u64da\u985e\u578b\u4e0d\u5339\u914d\uff0c\u5247\u9700\u8981\u66f4\u65b0\u6578\u64da\u985e\u578b\u6620\u5c04\u3002\u9019\u53ef\u4ee5\u901a\u904e\u4fee\u6539\u5916\u90e8\u8868\u7684\u5b9a\u7fa9\u4f86\u5b8c\u6210\uff1a<\/p>\n<pre><code>ALTER FOREIGN TABLE your_foreign_table_name \n    ALTER COLUMN your_column_name TYPE new_data_type;<\/code><\/pre>\n<h3 id=\"4-%e6%b8%ac%e8%a9%a6%e9%80%a3%e6%8e%a5-HDPXsEiEQk\">4. \u6e2c\u8a66\u9023\u63a5<\/h3>\n<p>\u5728\u9032\u884c\u4e0a\u8ff0\u66f4\u6539\u5f8c\uff0c\u6e2c\u8a66\u8207\u5916\u90e8\u6578\u64da\u6e90\u7684\u9023\u63a5\uff0c\u78ba\u4fdd\u554f\u984c\u5df2\u89e3\u6c7a\u3002\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u67e5\u8a62\u4f86\u6aa2\u67e5\u6578\u64da\u662f\u5426\u80fd\u5920\u6b63\u78ba\u8b80\u53d6\uff1a<\/p>\n<pre><code>SELECT * FROM your_foreign_table_name LIMIT 10;<\/code><\/pre>\n<h2 id=\"%e9%81%a0%e7%a8%8b%e8%99%95%e7%90%86%e5%bb%ba%e8%ad%b0-HDPXsEiEQk\">\u9060\u7a0b\u8655\u7406\u5efa\u8b70<\/h2>\n<p>\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u53ef\u80fd\u9700\u8981\u9032\u884c\u9060\u7a0b\u8655\u7406\u4f86\u89e3\u6c7a\u6b64\u554f\u984c\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5efa\u8b70\uff1a<\/p>\n<ul>\n<li><strong>\u4f7f\u7528SSH\u9023\u63a5\uff1a<\/strong>\u5982\u679c\u5916\u90e8\u6578\u64da\u6e90\u4f4d\u65bc\u9060\u7a0b\u4f3a\u670d\u5668\u4e0a\uff0c\u4f7f\u7528SSH\u9023\u63a5\u9032\u884c\u6545\u969c\u6392\u9664\u548c\u914d\u7f6e\u66f4\u6539\u3002<\/li>\n<li><strong>\u65e5\u8a8c\u6a94\u6848\u6aa2\u67e5\uff1a<\/strong>\u6aa2\u67e5PostgreSQL\u7684\u65e5\u8a8c\u6a94\u6848\uff0c\u4ee5\u7372\u53d6\u66f4\u591a\u932f\u8aa4\u4fe1\u606f\u548c\u4e0a\u4e0b\u6587\u3002<\/li>\n<li><strong>\u806f\u7e6b\u6578\u64da\u6e90\u7ba1\u7406\u54e1\uff1a<\/strong>\u5982\u679c\u554f\u984c\u51fa\u5728\u5916\u90e8\u6578\u64da\u6e90\uff0c\u806f\u7e6b\u76f8\u95dc\u7ba1\u7406\u54e1\u4ee5\u7372\u53d6\u652f\u6301\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-HDPXsEiEQk\">\u7e3d\u7d50<\/h2>\n<p>\u5728\u4f7f\u7528PostgreSQL\u7684FDW\u529f\u80fd\u6642\uff0c&#8221;HV006: fdw\u7121\u6548\u6578\u64da\u985e\u578b\u63cf\u8ff0\u7b26&#8221;\u932f\u8aa4\u53ef\u80fd\u6703\u5f71\u97ff\u6578\u64da\u7684\u6b63\u5e38\u8a2a\u554f\u3002\u901a\u904e\u6aa2\u67e5FDW\u914d\u7f6e\u3001\u9a57\u8b49\u5916\u90e8\u6578\u64da\u6e90\u3001\u66f4\u65b0\u6578\u64da\u985e\u578b\u6620\u5c04\u4ee5\u53ca\u9032\u884c\u5fc5\u8981\u7684\u9060\u7a0b\u8655\u7406\uff0c\u53ef\u4ee5\u6709\u6548\u89e3\u6c7a\u6b64\u554f\u984c\u3002\u5c0d\u65bc\u9700\u8981\u7a69\u5b9a\u548c\u9ad8\u6548\u7684\u6578\u64da\u5eab\u89e3\u6c7a\u65b9\u6848\u7684\u7528\u6236\uff0c\u9078\u64c7\u5408\u9069\u7684 <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u670d\u52d9\u5c07\u6709\u52a9\u65bc\u63d0\u5347\u6574\u9ad4\u6027\u80fd\u548c\u53ef\u9760\u6027\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u89e3\u51b3PostgreSQL HV006\u9519\u8bef\uff1afdw\u65e0\u6548\u6570\u636e\u7c7b\u578b\u63cf\u8ff0\u7b26\u7684\u6545\u969c\u4fee\u590d\u4e0e\u8fdc\u7a0b\u5904\u7406\u65b9\u6cd5\uff0c\u786e\u4fdd\u6570\u636e\u4f20\u8f93\u987a\u7545\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-96868","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/96868","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=96868"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/96868\/revisions"}],"predecessor-version":[{"id":96869,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/96868\/revisions\/96869"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=96868"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=96868"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=96868"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}