{"id":96884,"date":"2024-10-20T13:10:17","date_gmt":"2024-10-20T05:10:17","guid":{"rendered":"https:\/\/server.hk\/cnblog\/96884\/"},"modified":"2024-10-20T13:10:17","modified_gmt":"2024-10-20T05:10:17","slug":"postgresql-hv090-fdw%e7%84%a1%e6%95%88%e5%ad%97%e7%ac%a6%e4%b8%b2%e9%95%b7%e5%ba%a6%e6%88%96%e7%b7%a9%e8%a1%9d%e5%8d%80%e9%95%b7%e5%ba%a6-%e6%8a%a5%e9%94%99-%e6%95%85%e9%9a%9c%e4%bf%ae%e5%a4%8d","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/96884\/","title":{"rendered":"PostgreSQL HV090: fdw\u7121\u6548\u5b57\u7b26\u4e32\u9577\u5ea6\u6216\u7de9\u885d\u5340\u9577\u5ea6 \u62a5\u9519 \u6545\u969c\u4fee\u590d \u8fdc\u7a0b\u5904\u7406"},"content":{"rendered":"<h1 id=\"postgresql-hv090-fdw%e7%84%a1%e6%95%88%e5%ad%97%e7%ac%a6%e4%b8%b2%e9%95%b7%e5%ba%a6%e6%88%96%e7%b7%a9%e8%a1%9d%e5%8d%80%e9%95%b7%e5%ba%a6%e5%a0%b1%e9%8c%af%e6%95%85%e9%9a%9c%e4%bf%ae%e5%be%a9-tUJNdhizvH\">PostgreSQL HV090: fdw\u7121\u6548\u5b57\u7b26\u4e32\u9577\u5ea6\u6216\u7de9\u885d\u5340\u9577\u5ea6\u5831\u932f\u6545\u969c\u4fee\u5fa9<\/h1>\n<p>\u5728\u4f7f\u7528PostgreSQL\u9032\u884c\u6578\u64da\u5eab\u7ba1\u7406\u6642\uff0c\u53ef\u80fd\u6703\u9047\u5230\u5404\u7a2e\u932f\u8aa4\uff0c\u5176\u4e2d\u4e4b\u4e00\u662f\u201cHV090: fdw\u7121\u6548\u5b57\u7b26\u4e32\u9577\u5ea6\u6216\u7de9\u885d\u5340\u9577\u5ea6\u201d\u3002\u9019\u500b\u932f\u8aa4\u901a\u5e38\u8207\u5916\u90e8\u6578\u64da\u5305\uff08Foreign Data Wrapper, FDW\uff09\u6709\u95dc\uff0c\u7279\u5225\u662f\u5728\u9032\u884c\u9060\u7a0b\u6578\u64da\u8655\u7406\u6642\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u6b64\u932f\u8aa4\u7684\u539f\u56e0\u53ca\u5176\u89e3\u6c7a\u65b9\u6848\u3002<\/p>\n<h2 id=\"%e9%8c%af%e8%aa%a4%e5%8e%9f%e5%9b%a0%e5%88%86%e6%9e%90-tUJNdhizvH\">\u932f\u8aa4\u539f\u56e0\u5206\u6790<\/h2>\n<p>HV090\u932f\u8aa4\u901a\u5e38\u767c\u751f\u5728\u4f7f\u7528FDW\u6642\uff0c\u7576PostgreSQL\u5617\u8a66\u5f9e\u9060\u7a0b\u6578\u64da\u6e90\u8b80\u53d6\u6578\u64da\u6642\uff0c\u53ef\u80fd\u6703\u56e0\u70ba\u4ee5\u4e0b\u5e7e\u500b\u539f\u56e0\u5c0e\u81f4\u6b64\u932f\u8aa4\uff1a<\/p>\n<ul>\n<li><strong>\u6578\u64da\u985e\u578b\u4e0d\u5339\u914d\uff1a<\/strong>\u7576\u9060\u7a0b\u6578\u64da\u6e90\u7684\u6578\u64da\u985e\u578b\u8207\u672c\u5730\u6578\u64da\u5eab\u7684\u6578\u64da\u985e\u578b\u4e0d\u4e00\u81f4\u6642\uff0c\u53ef\u80fd\u6703\u5c0e\u81f4\u7121\u6548\u7684\u5b57\u7b26\u4e32\u9577\u5ea6\u932f\u8aa4\u3002<\/li>\n<li><strong>\u7de9\u885d\u5340\u6ea2\u51fa\uff1a<\/strong>\u5982\u679c\u5f9e\u9060\u7a0b\u6578\u64da\u6e90\u8b80\u53d6\u7684\u6578\u64da\u8d85\u904e\u4e86\u9810\u8a2d\u7684\u7de9\u885d\u5340\u5927\u5c0f\uff0c\u5247\u6703\u5f15\u767c\u6b64\u932f\u8aa4\u3002<\/li>\n<li><strong>\u914d\u7f6e\u554f\u984c\uff1a<\/strong>FDW\u7684\u914d\u7f6e\u4e0d\u6b63\u78ba\uff0c\u53ef\u80fd\u6703\u5c0e\u81f4PostgreSQL\u7121\u6cd5\u6b63\u78ba\u89e3\u6790\u9060\u7a0b\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-tUJNdhizvH\">\u6545\u969c\u4fee\u5fa9\u6b65\u9a5f<\/h2>\n<p>\u8981\u4fee\u5fa9HV090\u932f\u8aa4\uff0c\u53ef\u4ee5\u6309\u7167\u4ee5\u4e0b\u6b65\u9a5f\u9032\u884c\u6392\u67e5\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-tUJNdhizvH\">1. \u6aa2\u67e5\u6578\u64da\u985e\u578b<\/h3>\n<p>\u9996\u5148\uff0c\u6aa2\u67e5\u9060\u7a0b\u6578\u64da\u6e90\u7684\u6578\u64da\u985e\u578b\u662f\u5426\u8207\u672c\u5730\u6578\u64da\u5eab\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\u6240\u6709\u5217\u7684\u6578\u64da\u985e\u578b\u5728\u672c\u5730\u548c\u9060\u7a0b\u6578\u64da\u6e90\u4e2d\u4e00\u81f4\u3002\u5982\u679c\u767c\u73fe\u4e0d\u4e00\u81f4\uff0c\u5247\u9700\u8981\u9032\u884c\u76f8\u61c9\u7684\u8abf\u6574\u3002<\/p>\n<h3 id=\"2-%e8%aa%bf%e6%95%b4%e7%b7%a9%e8%a1%9d%e5%8d%80%e5%a4%a7%e5%b0%8f-tUJNdhizvH\">2. \u8abf\u6574\u7de9\u885d\u5340\u5927\u5c0f<\/h3>\n<p>\u5982\u679c\u61f7\u7591\u662f\u7de9\u885d\u5340\u6ea2\u51fa\u554f\u984c\uff0c\u53ef\u4ee5\u8003\u616e\u8abf\u6574PostgreSQL\u7684\u7de9\u885d\u5340\u8a2d\u7f6e\u3002\u53ef\u4ee5\u901a\u904e\u4fee\u6539postgresql.conf\u6587\u4ef6\u4e2d\u7684\u4ee5\u4e0b\u53c3\u6578\u4f86\u589e\u52a0\u7de9\u885d\u5340\u5927\u5c0f\uff1a<\/p>\n<pre><code>work_mem = '64MB'<\/code><\/pre>\n<p>\u4fee\u6539\u5f8c\uff0c\u91cd\u555fPostgreSQL\u670d\u52d9\u4ee5\u4f7f\u66f4\u6539\u751f\u6548\u3002<\/p>\n<h3 id=\"3-%e6%aa%a2%e6%9f%a5fdw%e9%85%8d%e7%bd%ae-tUJNdhizvH\">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_data_wrapper;<\/code><\/pre>\n<p>\u5982\u679c\u767c\u73fe\u914d\u7f6e\u4e0d\u6b63\u78ba\uff0c\u5247\u9700\u8981\u91cd\u65b0\u914d\u7f6eFDW\u3002\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\u4f86\u5275\u5efa\u6216\u4fee\u6539FDW\uff1a<\/p>\n<pre><code>CREATE FOREIGN DATA WRAPPER your_fdw_name \n    HANDLER your_handler_function \n    VALIDATOR your_validator_function;<\/code><\/pre>\n<h2 id=\"%e7%a4%ba%e4%be%8b%ef%bc%9a%e4%bf%ae%e5%be%a9hv090%e9%8c%af%e8%aa%a4-tUJNdhizvH\">\u793a\u4f8b\uff1a\u4fee\u5fa9HV090\u932f\u8aa4<\/h2>\n<p>\u5047\u8a2d\u60a8\u5728\u67e5\u8a62\u9060\u7a0b\u6578\u64da\u6642\u9047\u5230HV090\u932f\u8aa4\uff0c\u60a8\u53ef\u4ee5\u6309\u7167\u4ee5\u4e0b\u6b65\u9a5f\u9032\u884c\u4fee\u5fa9\uff1a<\/p>\n<pre><code>-- \u6aa2\u67e5\u9060\u7a0b\u8868\u7684\u6578\u64da\u985e\u578b\nSELECT column_name, data_type \nFROM foreign_table_name;\n\n-- \u8abf\u6574\u7de9\u885d\u5340\u5927\u5c0f\nALTER SYSTEM SET work_mem = '128MB';\nSELECT pg_reload_conf();\n\n-- \u6aa2\u67e5FDW\u914d\u7f6e\nSELECT * FROM pg_foreign_data_wrapper;\n<\/code><\/pre>\n<h2 id=\"%e7%b5%90%e8%ab%96-tUJNdhizvH\">\u7d50\u8ad6<\/h2>\n<p>HV090\u932f\u8aa4\u901a\u5e38\u662f\u7531\u65bc\u6578\u64da\u985e\u578b\u4e0d\u5339\u914d\u3001\u7de9\u885d\u5340\u6ea2\u51fa\u6216FDW\u914d\u7f6e\u554f\u984c\u5f15\u8d77\u7684\u3002\u901a\u904e\u6aa2\u67e5\u6578\u64da\u985e\u578b\u3001\u8abf\u6574\u7de9\u885d\u5340\u5927\u5c0f\u4ee5\u53ca\u78ba\u4fddFDW\u914d\u7f6e\u6b63\u78ba\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u89e3\u6c7a\u6b64\u554f\u984c\u3002\u5c0d\u65bc\u4f7f\u7528PostgreSQL\u9032\u884c\u9060\u7a0b\u6578\u64da\u8655\u7406\u7684\u7528\u6236\u4f86\u8aaa\uff0c\u4e86\u89e3\u9019\u4e9b\u6545\u969c\u6392\u9664\u6b65\u9a5f\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002<\/p>\n<p>\u5982\u9700\u9032\u4e00\u6b65\u4e86\u89e3\u5982\u4f55\u5728\u9999\u6e2f\u7684\u74b0\u5883\u4e2d\u4f7f\u7528PostgreSQL\uff0c\u60a8\u53ef\u4ee5\u8003\u616e\u6211\u5011\u7684<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u89e3\u6c7a\u65b9\u6848\uff0c\u9019\u5c07\u70ba\u60a8\u7684\u6578\u64da\u5eab\u7ba1\u7406\u63d0\u4f9b\u7a69\u5b9a\u7684\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u89e3\u51b3PostgreSQL HV090\u9519\u8bef\uff1afdw\u65e0\u6548\u5b57\u7b26\u4e32\u957f\u5ea6\u6216\u7f13\u51b2\u533a\u957f\u5ea6\uff0c\u63d0\u4f9b\u6545\u969c\u4fee\u590d\u548c\u8fdc\u7a0b\u5904\u7406\u65b9\u6cd5\uff0c\u786e\u4fdd\u6570\u636e\u5e93\u7a33\u5b9a\u8fd0\u884c\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-96884","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/96884","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=96884"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/96884\/revisions"}],"predecessor-version":[{"id":96885,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/96884\/revisions\/96885"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=96884"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=96884"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=96884"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}