{"id":96866,"date":"2024-10-20T13:01:19","date_gmt":"2024-10-20T05:01:19","guid":{"rendered":"https:\/\/server.hk\/cnblog\/96866\/"},"modified":"2024-10-20T13:01:19","modified_gmt":"2024-10-20T05:01:19","slug":"postgresql-hv004-fdw%e7%84%a1%e6%95%88%e6%95%b8%e6%93%9a%e9%a1%9e%e5%9e%8b-%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\/96866\/","title":{"rendered":"PostgreSQL HV004: fdw\u7121\u6548\u6578\u64da\u985e\u578b \u62a5\u9519 \u6545\u969c\u4fee\u590d \u8fdc\u7a0b\u5904\u7406"},"content":{"rendered":"<h1 id=\"postgresql-hv004-fdw%e7%84%a1%e6%95%88%e6%95%b8%e6%93%9a%e9%a1%9e%e5%9e%8b%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-rMlYlDTxRq\">PostgreSQL HV004: fdw\u7121\u6548\u6578\u64da\u985e\u578b\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\u5916\u90e8\u6578\u64da\u5305\uff08Foreign Data Wrapper, FDW\uff09\u662f\u4e00\u500b\u5f37\u5927\u7684\u529f\u80fd\uff0c\u5141\u8a31\u7528\u6236\u5f9e\u5176\u4ed6\u6578\u64da\u6e90\u67e5\u8a62\u6578\u64da\u3002\u7136\u800c\uff0c\u5728\u5be6\u969b\u61c9\u7528\u4e2d\uff0c\u4f7f\u7528FDW\u6642\u53ef\u80fd\u6703\u9047\u5230\u5404\u7a2e\u932f\u8aa4\uff0c\u5176\u4e2d\u4e4b\u4e00\u4fbf\u662f\u201cHV004: fdw\u7121\u6548\u6578\u64da\u985e\u578b\u201d\u5831\u932f\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e\u8a72\u932f\u8aa4\u7684\u539f\u56e0\u53ca\u5176\u89e3\u6c7a\u65b9\u6848\u3002<\/p>\n<h2 id=\"hv004%e9%8c%af%e8%aa%a4%e7%9a%84%e5%8e%9f%e5%9b%a0-rMlYlDTxRq\">HV004\u932f\u8aa4\u7684\u539f\u56e0<\/h2>\n<p>HV004\u932f\u8aa4\u901a\u5e38\u51fa\u73fe\u5728\u4f7f\u7528FDW\u6642\uff0c\u7576PostgreSQL\u7121\u6cd5\u8b58\u5225\u6216\u8655\u7406\u67d0\u500b\u6578\u64da\u985e\u578b\u6642\uff0c\u5c31\u6703\u5f15\u767c\u6b64\u932f\u8aa4\u3002\u9019\u53ef\u80fd\u662f\u7531\u65bc\u4ee5\u4e0b\u5e7e\u500b\u539f\u56e0\uff1a<\/p>\n<ul>\n<li><strong>\u6578\u64da\u985e\u578b\u4e0d\u5339\u914d\uff1a<\/strong>\u7576\u5f9e\u5916\u90e8\u6578\u64da\u6e90\u63d0\u53d6\u6578\u64da\u6642\uff0cPostgreSQL\u9700\u8981\u78ba\u4fdd\u6578\u64da\u985e\u578b\u8207\u672c\u5730\u6578\u64da\u5eab\u4e2d\u7684\u985e\u578b\u76f8\u5339\u914d\u3002\u5982\u679c\u5916\u90e8\u6578\u64da\u6e90\u7684\u6578\u64da\u985e\u578b\u8207PostgreSQL\u7684\u6578\u64da\u985e\u578b\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\u53ef\u80fd\u6703\u5c0e\u81f4PostgreSQL\u7121\u6cd5\u6b63\u78ba\u89e3\u6790\u5916\u90e8\u6578\u64da\u7684\u985e\u578b\u3002<\/li>\n<li><strong>\u7248\u672c\u4e0d\u517c\u5bb9\uff1a<\/strong>\u4e0d\u540c\u7248\u672c\u7684PostgreSQL\u548cFDW\u53ef\u80fd\u5b58\u5728\u4e0d\u517c\u5bb9\u7684\u60c5\u6cc1\uff0c\u9019\u4e5f\u53ef\u80fd\u5c0e\u81f4\u6578\u64da\u985e\u578b\u7684\u8b58\u5225\u554f\u984c\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-rMlYlDTxRq\">\u6545\u969c\u4fee\u5fa9\u6b65\u9a5f<\/h2>\n<p>\u7576\u9047\u5230HV004\u932f\u8aa4\u6642\uff0c\u53ef\u4ee5\u6309\u7167\u4ee5\u4e0b\u6b65\u9a5f\u9032\u884c\u6545\u969c\u6392\u9664\u548c\u4fee\u5fa9\uff1a<\/p>\n<h3 id=\"1-%e6%aa%a2%e6%9f%a5%e6%95%b8%e6%93%9a%e9%a1%9e%e5%9e%8b-rMlYlDTxRq\">1. \u6aa2\u67e5\u6578\u64da\u985e\u578b<\/h3>\n<p>\u9996\u5148\uff0c\u6aa2\u67e5\u5916\u90e8\u6578\u64da\u6e90\u7684\u6578\u64da\u985e\u578b\uff0c\u78ba\u4fdd\u5b83\u5011\u8207PostgreSQL\u4e2d\u7684\u6578\u64da\u985e\u578b\u76f8\u5339\u914d\u3002\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0bSQL\u67e5\u8a62\u4f86\u6aa2\u67e5\u6578\u64da\u985e\u578b\uff1a<\/p>\n<pre><code>SELECT column_name, data_type \nFROM information_schema.columns \nWHERE table_name = 'your_table_name';<\/code><\/pre>\n<p>\u78ba\u4fdd\u5916\u90e8\u6578\u64da\u6e90\u7684\u6578\u64da\u985e\u578b\u8207PostgreSQL\u4e2d\u7684\u6578\u64da\u985e\u578b\u4e00\u81f4\u3002<\/p>\n<h3 id=\"2-%e6%9b%b4%e6%96%b0fdw%e9%85%8d%e7%bd%ae-rMlYlDTxRq\">2. \u66f4\u65b0FDW\u914d\u7f6e<\/h3>\n<p>\u5982\u679c\u6578\u64da\u985e\u578b\u4e0d\u5339\u914d\uff0c\u5247\u9700\u8981\u66f4\u65b0FDW\u7684\u914d\u7f6e\u3002\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\u4f86\u91cd\u65b0\u5275\u5efaFDW\u4e26\u6307\u5b9a\u6b63\u78ba\u7684\u6578\u64da\u985e\u578b\uff1a<\/p>\n<pre><code>CREATE FOREIGN TABLE your_foreign_table (\n    column_name data_type\n) SERVER your_server\nOPTIONS (table 'external_table_name');<\/code><\/pre>\n<h3 id=\"3-%e6%aa%a2%e6%9f%a5%e7%89%88%e6%9c%ac%e5%85%bc%e5%ae%b9%e6%80%a7-rMlYlDTxRq\">3. \u6aa2\u67e5\u7248\u672c\u517c\u5bb9\u6027<\/h3>\n<p>\u78ba\u4fddPostgreSQL\u548cFDW\u7684\u7248\u672c\u662f\u517c\u5bb9\u7684\u3002\u53ef\u4ee5\u901a\u904e\u67e5\u95b1\u5b98\u65b9\u6587\u6a94\u4f86\u78ba\u8a8d\u6240\u4f7f\u7528\u7684\u7248\u672c\u662f\u5426\u652f\u6301\u6240\u9700\u7684\u529f\u80fd\u3002<\/p>\n<h2 id=\"%e9%81%a0%e7%a8%8b%e8%99%95%e7%90%86%e7%9a%84%e8%80%83%e9%87%8f-rMlYlDTxRq\">\u9060\u7a0b\u8655\u7406\u7684\u8003\u91cf<\/h2>\n<p>\u5728\u9032\u884c\u9060\u7a0b\u6578\u64da\u8655\u7406\u6642\uff0c\u9084\u9700\u8003\u616e\u7db2\u7d61\u5ef6\u9072\u548c\u6578\u64da\u50b3\u8f38\u7684\u7a69\u5b9a\u6027\u3002\u4f7f\u7528FDW\u6642\uff0c\u6578\u64da\u7684\u8b80\u53d6\u901f\u5ea6\u53ef\u80fd\u6703\u53d7\u5230\u7db2\u7d61\u72c0\u6cc1\u7684\u5f71\u97ff\uff0c\u56e0\u6b64\u5728\u8a2d\u8a08\u7cfb\u7d71\u6642\u61c9\u8003\u616e\u5230\u9019\u4e00\u9ede\u3002<\/p>\n<p>\u6b64\u5916\uff0c\u5c0d\u65bc\u5927\u578b\u6578\u64da\u96c6\uff0c\u5efa\u8b70\u4f7f\u7528\u6279\u91cf\u8655\u7406\u7684\u65b9\u5f0f\u4f86\u6e1b\u5c11\u5c0d\u7cfb\u7d71\u6027\u80fd\u7684\u5f71\u97ff\u3002\u53ef\u4ee5\u901a\u904e\u8a2d\u7f6e\u5408\u9069\u7684\u67e5\u8a62\u53c3\u6578\u4f86\u512a\u5316\u6027\u80fd\u3002<\/p>\n<h2 id=\"%e7%b8%bd%e7%b5%90-rMlYlDTxRq\">\u7e3d\u7d50<\/h2>\n<p>HV004\u932f\u8aa4\u5728\u4f7f\u7528PostgreSQL\u7684FDW\u529f\u80fd\u6642\u4e26\u4e0d\u7f55\u898b\uff0c\u4e86\u89e3\u5176\u539f\u56e0\u53ca\u89e3\u6c7a\u65b9\u6848\u5c0d\u65bc\u6578\u64da\u5eab\u7ba1\u7406\u8005\u4f86\u8aaa\u81f3\u95dc\u91cd\u8981\u3002\u901a\u904e\u6aa2\u67e5\u6578\u64da\u985e\u578b\u3001\u66f4\u65b0FDW\u914d\u7f6e\u4ee5\u53ca\u78ba\u4fdd\u7248\u672c\u517c\u5bb9\u6027\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u89e3\u6c7a\u6b64\u554f\u984c\u3002\u5c0d\u65bc\u9700\u8981\u9032\u884c\u9060\u7a0b\u6578\u64da\u8655\u7406\u7684\u7528\u6236\uff0c\u9078\u64c7\u5408\u9069\u7684<code><a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a><\/code>\u6216<code><a href=\"https:\/\/server.hk\">\u4e91\u670d\u52a1\u5668<\/a><\/code>\u53ef\u4ee5\u63d0\u9ad8\u6578\u64da\u8655\u7406\u7684\u6548\u7387\u548c\u7a69\u5b9a\u6027\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u89e3\u51b3PostgreSQL HV004\u9519\u8bef\uff1afdw\u65e0\u6548\u6570\u636e\u7c7b\u578b\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-96866","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/96866","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=96866"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/96866\/revisions"}],"predecessor-version":[{"id":96867,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/96866\/revisions\/96867"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=96866"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=96866"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=96866"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}