{"id":96870,"date":"2024-10-20T13:03:20","date_gmt":"2024-10-20T05:03:20","guid":{"rendered":"https:\/\/server.hk\/cnblog\/96870\/"},"modified":"2024-10-20T13:03:21","modified_gmt":"2024-10-20T05:03:21","slug":"postgresql-hv007-fdw%e7%84%a1%e6%95%88%e5%88%97%e5%90%8d-%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\/96870\/","title":{"rendered":"PostgreSQL HV007: fdw\u7121\u6548\u5217\u540d \u62a5\u9519 \u6545\u969c\u4fee\u590d \u8fdc\u7a0b\u5904\u7406"},"content":{"rendered":"<h1 id=\"postgresql-hv007-fdw%e7%84%a1%e6%95%88%e5%88%97%e5%90%8d%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-JcLEoLfsxK\">PostgreSQL HV007: fdw\u7121\u6548\u5217\u540d\u5831\u932f\u6545\u969c\u4fee\u5fa9\u9060\u7a0b\u8655\u7406<\/h1>\n<p>\u5728\u4f7f\u7528PostgreSQL\u7684\u904e\u7a0b\u4e2d\uff0c\u7279\u5225\u662f\u7576\u6d89\u53ca\u5230\u5916\u90e8\u6578\u64da\u5305\uff08Foreign Data Wrapper, FDW\uff09\u6642\uff0c\u958b\u767c\u8005\u53ef\u80fd\u6703\u9047\u5230\u5404\u7a2e\u932f\u8aa4\u3002\u5176\u4e2d\u4e00\u500b\u5e38\u898b\u7684\u932f\u8aa4\u662f\u201c\u7121\u6548\u5217\u540d\u201d\uff08invalid column name\uff09\uff0c\u9019\u901a\u5e38\u6703\u5c0e\u81f4\u67e5\u8a62\u5931\u6557\uff0c\u5f71\u97ff\u6578\u64da\u7684\u6b63\u5e38\u8a2a\u554f\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u6b64\u932f\u8aa4\u7684\u539f\u56e0\u53ca\u5176\u89e3\u6c7a\u65b9\u6848\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u9060\u7a0b\u8655\u7406\u7684\u5efa\u8b70\u3002<\/p>\n<h2 id=\"fdw%e7%9a%84%e5%9f%ba%e6%9c%ac%e6%a6%82%e5%bf%b5-JcLEoLfsxK\">FDW\u7684\u57fa\u672c\u6982\u5ff5<\/h2>\n<p>\u5916\u90e8\u6578\u64da\u5305\uff08FDW\uff09\u5141\u8a31PostgreSQL\u8a2a\u554f\u5176\u4ed6\u6578\u64da\u5eab\u4e2d\u7684\u6578\u64da\uff0c\u7121\u8ad6\u662f\u540c\u4e00\u500bPostgreSQL\u5be6\u4f8b\u9084\u662f\u5176\u4ed6\u985e\u578b\u7684\u6578\u64da\u5eab\u3002\u9019\u4f7f\u5f97\u6578\u64da\u6574\u5408\u8b8a\u5f97\u66f4\u52a0\u9748\u6d3b\u548c\u9ad8\u6548\u3002FDW\u7684\u4f7f\u7528\u53ef\u4ee5\u7c21\u5316\u6578\u64da\u67e5\u8a62\uff0c\u4e26\u63d0\u9ad8\u6578\u64da\u7684\u53ef\u7528\u6027\u3002<\/p>\n<h2 id=\"%e7%84%a1%e6%95%88%e5%88%97%e5%90%8d%e7%9a%84%e5%8e%9f%e5%9b%a0-JcLEoLfsxK\">\u7121\u6548\u5217\u540d\u7684\u539f\u56e0<\/h2>\n<p>\u7576\u4f7f\u7528FDW\u9032\u884c\u67e5\u8a62\u6642\uff0c\u51fa\u73fe\u201c\u7121\u6548\u5217\u540d\u201d\u932f\u8aa4\u7684\u539f\u56e0\u53ef\u80fd\u6709\u591a\u7a2e\uff1a<\/p>\n<ul>\n<li><strong>\u5217\u540d\u62fc\u5beb\u932f\u8aa4\uff1a<\/strong>\u5728\u67e5\u8a62\u4e2d\u4f7f\u7528\u7684\u5217\u540d\u53ef\u80fd\u8207\u9060\u7a0b\u6578\u64da\u5eab\u4e2d\u7684\u5217\u540d\u4e0d\u5339\u914d\u3002<\/li>\n<li><strong>\u5217\u540d\u5927\u5c0f\u5beb\u554f\u984c\uff1a<\/strong>PostgreSQL\u5c0d\u65bc\u5217\u540d\u7684\u5927\u5c0f\u5beb\u662f\u654f\u611f\u7684\u3002\u5982\u679c\u5728\u5275\u5efa\u8868\u6642\u4f7f\u7528\u4e86\u96d9\u5f15\u865f\uff0c\u5247\u5728\u67e5\u8a62\u6642\u4e5f\u5fc5\u9808\u4f7f\u7528\u76f8\u540c\u7684\u5927\u5c0f\u5beb\u3002<\/li>\n<li><strong>FDW\u914d\u7f6e\u554f\u984c\uff1a<\/strong>\u5982\u679cFDW\u7684\u914d\u7f6e\u4e0d\u6b63\u78ba\uff0c\u53ef\u80fd\u6703\u5c0e\u81f4\u7121\u6cd5\u6b63\u78ba\u8b58\u5225\u5217\u540d\u3002<\/li>\n<li><strong>\u6578\u64da\u985e\u578b\u4e0d\u5339\u914d\uff1a<\/strong>\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u6578\u64da\u985e\u578b\u7684\u4e0d\u5339\u914d\u4e5f\u53ef\u80fd\u5c0e\u81f4\u6b64\u932f\u8aa4\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-JcLEoLfsxK\">\u6545\u969c\u4fee\u5fa9\u6b65\u9a5f<\/h2>\n<p>\u70ba\u4e86\u89e3\u6c7a\u201c\u7121\u6548\u5217\u540d\u201d\u932f\u8aa4\uff0c\u53ef\u4ee5\u6309\u7167\u4ee5\u4e0b\u6b65\u9a5f\u9032\u884c\u6545\u969c\u6392\u9664\uff1a<\/p>\n<h3 id=\"1-%e6%aa%a2%e6%9f%a5%e5%88%97%e5%90%8d-JcLEoLfsxK\">1. \u6aa2\u67e5\u5217\u540d<\/h3>\n<pre><code>SELECT * FROM foreign_table WHERE column_name = 'value';\n<\/code><\/pre>\n<p>\u9996\u5148\uff0c\u6aa2\u67e5\u67e5\u8a62\u4e2d\u4f7f\u7528\u7684\u5217\u540d\u662f\u5426\u6b63\u78ba\u3002\u53ef\u4ee5\u901a\u904e\u67e5\u8a62\u9060\u7a0b\u6578\u64da\u5eab\u7684\u5143\u6578\u64da\u4f86\u78ba\u8a8d\u5217\u540d\uff1a<\/p>\n<pre><code>SELECT column_name FROM information_schema.columns WHERE table_name = 'foreign_table';\n<\/code><\/pre>\n<h3 id=\"2-%e6%aa%a2%e6%9f%a5%e5%a4%a7%e5%b0%8f%e5%af%ab-JcLEoLfsxK\">2. \u6aa2\u67e5\u5927\u5c0f\u5beb<\/h3>\n<p>\u5982\u679c\u5217\u540d\u5728\u5275\u5efa\u6642\u4f7f\u7528\u4e86\u96d9\u5f15\u865f\uff0c\u5247\u5728\u67e5\u8a62\u6642\u4e5f\u5fc5\u9808\u4f7f\u7528\u76f8\u540c\u7684\u5927\u5c0f\u5beb\u3002\u4f8b\u5982\uff1a<\/p>\n<pre><code>SELECT \"ColumnName\" FROM foreign_table;\n<\/code><\/pre>\n<h3 id=\"3-%e6%aa%a2%e6%9f%a5fdw%e9%85%8d%e7%bd%ae-JcLEoLfsxK\">3. \u6aa2\u67e5FDW\u914d\u7f6e<\/h3>\n<p>\u78ba\u4fddFDW\u7684\u914d\u7f6e\u6b63\u78ba\u3002\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\u6aa2\u67e5FDW\u7684\u8a2d\u7f6e\uff1a<\/p>\n<pre><code>SELECT * FROM pg_foreign_table WHERE ftname = 'foreign_table';\n<\/code><\/pre>\n<h3 id=\"4-%e6%b8%ac%e8%a9%a6%e6%95%b8%e6%93%9a%e9%a1%9e%e5%9e%8b-JcLEoLfsxK\">4. \u6e2c\u8a66\u6578\u64da\u985e\u578b<\/h3>\n<p>\u5982\u679c\u5217\u540d\u548c\u5927\u5c0f\u5beb\u90fd\u6b63\u78ba\uff0c\u5247\u9700\u8981\u6aa2\u67e5\u6578\u64da\u985e\u578b\u662f\u5426\u5339\u914d\u3002\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\u6aa2\u67e5\u5217\u7684\u6578\u64da\u985e\u578b\uff1a<\/p>\n<pre><code>SELECT data_type FROM information_schema.columns WHERE table_name = 'foreign_table' AND column_name = 'column_name';\n<\/code><\/pre>\n<h2 id=\"%e9%81%a0%e7%a8%8b%e8%99%95%e7%90%86%e5%bb%ba%e8%ad%b0-JcLEoLfsxK\">\u9060\u7a0b\u8655\u7406\u5efa\u8b70<\/h2>\n<p>\u5728\u8655\u7406FDW\u76f8\u95dc\u7684\u554f\u984c\u6642\uff0c\u9060\u7a0b\u8655\u7406\u53ef\u4ee5\u662f\u4e00\u500b\u6709\u6548\u7684\u89e3\u6c7a\u65b9\u6848\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5efa\u8b70\uff1a<\/p>\n<ul>\n<li><strong>\u4f7f\u7528SSH\u96a7\u9053\uff1a<\/strong>\u5982\u679c\u9700\u8981\u8a2a\u554f\u9060\u7a0b\u6578\u64da\u5eab\uff0c\u53ef\u4ee5\u8003\u616e\u4f7f\u7528SSH\u96a7\u9053\u4f86\u4fdd\u8b77\u6578\u64da\u50b3\u8f38\u3002<\/li>\n<li><strong>\u5b9a\u671f\u5099\u4efd\uff1a<\/strong>\u5728\u9032\u884c\u4efb\u4f55\u66f4\u6539\u4e4b\u524d\uff0c\u78ba\u4fdd\u5c0d\u6578\u64da\u5eab\u9032\u884c\u5b9a\u671f\u5099\u4efd\uff0c\u4ee5\u9632\u6b62\u6578\u64da\u4e1f\u5931\u3002<\/li>\n<li><strong>\u76e3\u63a7\u6027\u80fd\uff1a<\/strong>\u4f7f\u7528\u76e3\u63a7\u5de5\u5177\u4f86\u8ddf\u8e2aFDW\u7684\u6027\u80fd\uff0c\u53ca\u6642\u767c\u73fe\u4e26\u89e3\u6c7a\u554f\u984c\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-JcLEoLfsxK\">\u7e3d\u7d50<\/h2>\n<p>\u5728\u4f7f\u7528PostgreSQL\u7684FDW\u529f\u80fd\u6642\uff0c\u7121\u6548\u5217\u540d\u7684\u932f\u8aa4\u53ef\u80fd\u6703\u5f71\u97ff\u6578\u64da\u7684\u6b63\u5e38\u8a2a\u554f\u3002\u901a\u904e\u6aa2\u67e5\u5217\u540d\u3001\u5927\u5c0f\u5beb\u3001FDW\u914d\u7f6e\u548c\u6578\u64da\u985e\u578b\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u89e3\u6c7a\u6b64\u554f\u984c\u3002\u6b64\u5916\uff0c\u9060\u7a0b\u8655\u7406\u7684\u5efa\u8b70\u53ef\u4ee5\u5e6b\u52a9\u7528\u6236\u66f4\u597d\u5730\u7ba1\u7406\u548c\u7dad\u8b77\u6578\u64da\u5eab\u3002\u5c0d\u65bc\u9700\u8981\u7a69\u5b9a\u548c\u9ad8\u6548\u7684\u6578\u64da\u8655\u7406\u7684\u7528\u6236\uff0c\u9078\u64c7\u5408\u9069\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\u5c07\u662f\u660e\u667a\u7684\u9078\u64c7\u3002\u7121\u8ad6\u662f <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u9084\u662f\u5176\u4ed6\u985e\u578b\u7684 <a href=\"https:\/\/server.hk\">\u4f3a\u670d\u5668<\/a>\uff0c\u90fd\u80fd\u63d0\u4f9b\u826f\u597d\u7684\u652f\u6301\u548c\u6027\u80fd\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u89e3\u51b3PostgreSQL HV007\u9519\u8bef\uff1afdw\u65e0\u6548\u5217\u540d\u7684\u6545\u969c\u4fee\u590d\u4e0e\u8fdc\u7a0b\u5904\u7406\u65b9\u6cd5\uff0c\u786e\u4fdd\u6570\u636e\u8bbf\u95ee\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-96870","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/96870","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=96870"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/96870\/revisions"}],"predecessor-version":[{"id":96871,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/96870\/revisions\/96871"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=96870"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=96870"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=96870"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}