{"id":96872,"date":"2024-10-20T13:04:16","date_gmt":"2024-10-20T05:04:16","guid":{"rendered":"https:\/\/server.hk\/cnblog\/96872\/"},"modified":"2024-10-20T13:04:16","modified_gmt":"2024-10-20T05:04:16","slug":"postgresql-hv008-fdw%e7%84%a1%e6%95%88%e5%88%97%e8%99%9f-%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\/96872\/","title":{"rendered":"PostgreSQL HV008: fdw\u7121\u6548\u5217\u865f \u62a5\u9519 \u6545\u969c\u4fee\u590d \u8fdc\u7a0b\u5904\u7406"},"content":{"rendered":"<h1 id=\"postgresql-hv008-fdw%e7%84%a1%e6%95%88%e5%88%97%e8%99%9f%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-gMkCpGyIwt\">PostgreSQL HV008: fdw\u7121\u6548\u5217\u865f\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\u201cHV008: fdw\u7121\u6548\u5217\u865f\u201d\u3002\u9019\u7bc7\u6587\u7ae0\u5c07\u6df1\u5165\u63a2\u8a0e\u9019\u500b\u932f\u8aa4\u7684\u539f\u56e0\u3001\u5f71\u97ff\u4ee5\u53ca\u5982\u4f55\u9032\u884c\u6545\u969c\u4fee\u5fa9\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%affdw%ef%bc%9f-gMkCpGyIwt\">\u4ec0\u9ebc\u662fFDW\uff1f<\/h2>\n<p>\u5916\u90e8\u6578\u64da\u5305\uff08FDW\uff09\u662f\u4e00\u7a2ePostgreSQL\u7684\u64f4\u5c55\u529f\u80fd\uff0c\u5141\u8a31\u7528\u6236\u5f9e\u5176\u4ed6\u6578\u64da\u5eab\u6216\u6578\u64da\u6e90\u4e2d\u67e5\u8a62\u6578\u64da\u3002\u9019\u4f7f\u5f97PostgreSQL\u80fd\u5920\u8207\u5176\u4ed6\u6578\u64da\u5eab\u7cfb\u7d71\uff08\u5982MySQL\u3001Oracle\u7b49\uff09\u9032\u884c\u4ea4\u4e92\uff0c\u5f9e\u800c\u5be6\u73fe\u6578\u64da\u7684\u6574\u5408\u548c\u5171\u4eab\u3002<\/p>\n<h2 id=\"hv008%e9%8c%af%e8%aa%a4%e7%9a%84%e5%8e%9f%e5%9b%a0-gMkCpGyIwt\">HV008\u932f\u8aa4\u7684\u539f\u56e0<\/h2>\n<p>HV008\u932f\u8aa4\u901a\u5e38\u51fa\u73fe\u5728\u4ee5\u4e0b\u60c5\u6cc1\uff1a<\/p>\n<ul>\n<li>\u67e5\u8a62\u4e2d\u5f15\u7528\u4e86\u4e0d\u5b58\u5728\u7684\u5217\u3002<\/li>\n<li>FDW\u7684\u914d\u7f6e\u4e0d\u6b63\u78ba\uff0c\u5c0e\u81f4PostgreSQL\u7121\u6cd5\u6b63\u78ba\u8b58\u5225\u5217\u3002<\/li>\n<li>\u6578\u64da\u6e90\u7684\u7d50\u69cb\u767c\u751f\u8b8a\u5316\uff0c\u4f46FDW\u672a\u9032\u884c\u76f8\u61c9\u7684\u66f4\u65b0\u3002<\/li>\n<\/ul>\n<p>\u9019\u4e9b\u60c5\u6cc1\u90fd\u53ef\u80fd\u5c0e\u81f4PostgreSQL\u7121\u6cd5\u6b63\u78ba\u8655\u7406\u67e5\u8a62\uff0c\u5f9e\u800c\u5f15\u767cHV008\u932f\u8aa4\u3002<\/p>\n<h2 id=\"%e6%95%85%e9%9a%9c%e4%bf%ae%e5%be%a9%e6%ad%a5%e9%a9%9f-gMkCpGyIwt\">\u6545\u969c\u4fee\u5fa9\u6b65\u9a5f<\/h2>\n<p>\u7576\u9047\u5230HV008\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%9f%a5%e8%a9%a2%e8%aa%9e%e5%8f%a5-gMkCpGyIwt\">1. \u6aa2\u67e5\u67e5\u8a62\u8a9e\u53e5<\/h3>\n<pre><code>SELECT column_name FROM foreign_table WHERE condition;<\/code><\/pre>\n<p>\u9996\u5148\uff0c\u6aa2\u67e5\u67e5\u8a62\u8a9e\u53e5\u4e2d\u5f15\u7528\u7684\u5217\u540d\u662f\u5426\u6b63\u78ba\u3002\u78ba\u4fdd\u6240\u6709\u5217\u540d\u90fd\u5b58\u5728\u65bc\u5916\u90e8\u6578\u64da\u8868\u4e2d\u3002<\/p>\n<h3 id=\"2-%e9%a9%97%e8%ad%89fdw%e9%85%8d%e7%bd%ae-gMkCpGyIwt\">2. \u9a57\u8b49FDW\u914d\u7f6e<\/h3>\n<p>\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\u6aa2\u67e5FDW\u7684\u914d\u7f6e\uff1a<\/p>\n<pre><code>SELECT * FROM pg_foreign_table;<\/code><\/pre>\n<p>\u78ba\u4fddFDW\u7684\u8a2d\u7f6e\u6b63\u78ba\uff0c\u4e26\u4e14\u6240\u6709\u5fc5\u8981\u7684\u53c3\u6578\u90fd\u5df2\u6b63\u78ba\u914d\u7f6e\u3002<\/p>\n<h3 id=\"3-%e6%9b%b4%e6%96%b0%e5%a4%96%e9%83%a8%e6%95%b8%e6%93%9a%e6%ba%90%e7%b5%90%e6%a7%8b-gMkCpGyIwt\">3. \u66f4\u65b0\u5916\u90e8\u6578\u64da\u6e90\u7d50\u69cb<\/h3>\n<p>\u5982\u679c\u5916\u90e8\u6578\u64da\u6e90\u7684\u7d50\u69cb\u767c\u751f\u8b8a\u5316\uff0c\u5247\u9700\u8981\u66f4\u65b0FDW\u7684\u5b9a\u7fa9\u3002\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\u91cd\u65b0\u5275\u5efa\u5916\u90e8\u8868\uff1a<\/p>\n<pre><code>CREATE FOREIGN TABLE foreign_table (\n    column_name data_type\n) SERVER foreign_server\nOPTIONS (option_name 'option_value');<\/code><\/pre>\n<h3 id=\"4-%e6%aa%a2%e6%9f%a5%e6%ac%8a%e9%99%90%e8%a8%ad%e7%bd%ae-gMkCpGyIwt\">4. \u6aa2\u67e5\u6b0a\u9650\u8a2d\u7f6e<\/h3>\n<p>\u78ba\u4fdd\u7528\u6236\u5c0d\u5916\u90e8\u6578\u64da\u6e90\u64c1\u6709\u8db3\u5920\u7684\u8a2a\u554f\u6b0a\u9650\u3002\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\u6aa2\u67e5\u6b0a\u9650\uff1a<\/p>\n<pre><code>GRANT SELECT ON foreign_table TO user_name;<\/code><\/pre>\n<h2 id=\"%e9%81%a0%e7%a8%8b%e8%99%95%e7%90%86%e7%9a%84%e8%80%83%e9%87%8f-gMkCpGyIwt\">\u9060\u7a0b\u8655\u7406\u7684\u8003\u91cf<\/h2>\n<p>\u5728\u9032\u884c\u9060\u7a0b\u6578\u64da\u8655\u7406\u6642\uff0c\u7279\u5225\u662f\u5728\u4f7f\u7528FDW\u6642\uff0c\u7db2\u7d61\u5ef6\u9072\u548c\u6578\u64da\u4e00\u81f4\u6027\u90fd\u662f\u9700\u8981\u8003\u616e\u7684\u91cd\u8981\u56e0\u7d20\u3002\u78ba\u4fdd\u7db2\u7d61\u9023\u63a5\u7a69\u5b9a\uff0c\u4e26\u5b9a\u671f\u6aa2\u67e5\u6578\u64da\u6e90\u7684\u53ef\u7528\u6027\uff0c\u4ee5\u907f\u514d\u56e0\u7db2\u7d61\u554f\u984c\u5c0e\u81f4\u7684\u932f\u8aa4\u3002<\/p>\n<h2 id=\"%e7%b8%bd%e7%b5%90-gMkCpGyIwt\">\u7e3d\u7d50<\/h2>\n<p>HV008\u932f\u8aa4\u5728\u4f7f\u7528PostgreSQL\u7684FDW\u529f\u80fd\u6642\u4e26\u4e0d\u7f55\u898b\u3002\u901a\u904e\u4ed4\u7d30\u6aa2\u67e5\u67e5\u8a62\u8a9e\u53e5\u3001FDW\u914d\u7f6e\u3001\u5916\u90e8\u6578\u64da\u6e90\u7d50\u69cb\u4ee5\u53ca\u6b0a\u9650\u8a2d\u7f6e\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u89e3\u6c7a\u9019\u4e00\u554f\u984c\u3002\u5c0d\u65bc\u9700\u8981\u9032\u884c\u9060\u7a0b\u6578\u64da\u8655\u7406\u7684\u7528\u6236\uff0c\u9078\u64c7\u5408\u9069\u7684<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u670d\u52d9\u53ef\u4ee5\u63d0\u4f9b\u7a69\u5b9a\u7684\u652f\u6301\uff0c\u78ba\u4fdd\u6578\u64da\u7684\u9ad8\u6548\u8a2a\u554f\u548c\u8655\u7406\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u89e3\u51b3PostgreSQL HV008\u9519\u8bef\uff1afdw\u65e0\u6548\u5217\u53f7\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-96872","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/96872","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=96872"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/96872\/revisions"}],"predecessor-version":[{"id":96873,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/96872\/revisions\/96873"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=96872"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=96872"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=96872"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}