{"id":441638,"date":"2025-05-16T09:30:16","date_gmt":"2025-05-16T01:30:16","guid":{"rendered":"https:\/\/www.idc.net\/help\/?p=441638"},"modified":"2025-05-16T17:09:14","modified_gmt":"2025-05-16T09:09:14","slug":"%e4%bd%bf%e7%94%a8-c-c-%e4%b8%8e-libpqxx-%e8%bf%9e%e6%8e%a5-postgresql-%e6%95%b0%e6%8d%ae%e5%ba%93%ef%bc%9a%e5%bc%80%e5%8f%91%e6%95%99%e7%a8%8b%e4%b8%8e%e5%ba%94%e7%94%a8%e5%ae%9e%e6%88%98","status":"publish","type":"post","link":"https:\/\/idc.net\/help\/441638\/","title":{"rendered":"\u4f7f\u7528 C\/C++ \u4e0e libpqxx \u8fde\u63a5 PostgreSQL \u6570\u636e\u5e93\uff1a\u5f00\u53d1\u6559\u7a0b\u4e0e\u5e94\u7528\u5b9e\u6218"},"content":{"rendered":"<h2>\u5f15\u8a00<\/h2>\n<p>\u5728\u73b0\u4ee3\u4f01\u4e1a\u5e94\u7528\u5f00\u53d1\u4e2d\uff0c\u6570\u636e\u5e93\u7684\u9ad8\u6548\u63a5\u5165\u4e0e\u5b89\u5168\u7ba1\u7406\u81f3\u5173\u91cd\u8981\u3002\u5bf9\u4e8e\u9700\u8981\u4f7f\u7528 C\/C++ \u8bed\u8a00\u8fdb\u884c\u9ad8\u6027\u80fd\u540e\u7aef\u5f00\u53d1\u7684\u5de5\u7a0b\u5e08\u800c\u8a00\uff0clibpqxx \u662f\u8fde\u63a5 PostgreSQL \u6570\u636e\u5e93\u7684\u7406\u60f3\u9009\u62e9\u3002\u5b83\u4f5c\u4e3a PostgreSQL \u5b98\u65b9\u63a8\u8350\u7684 C++ \u5ba2\u6237\u7aef API\uff0c\u4e0d\u4ec5\u529f\u80fd\u5b8c\u5907\u3001\u6587\u6863\u6e05\u6670\uff0c\u8fd8\u652f\u6301 BSD \u6388\u6743\uff0c\u9002\u5408\u81ea\u7531\u5206\u53d1\u548c\u96c6\u6210\u4f7f\u7528\u3002<\/p>\n<p>\u672c\u6587\u5c06\u5e26\u60a8\u6df1\u5165\u4e86\u89e3\u5982\u4f55\u5728 C\/C++ \u9879\u76ee\u4e2d\u4f7f\u7528 libpqxx \u6765\u5b9e\u73b0 PostgreSQL \u6570\u636e\u5e93\u7684\u8fde\u63a5\u3001\u6570\u636e\u8868\u521b\u5efa\u4ee5\u53ca\u6570\u636e\u63d2\u5165\u64cd\u4f5c\u3002\u540c\u65f6\uff0c\u9488\u5bf9\u90e8\u7f72\u5728 <strong>\u9999\u6e2fvps<\/strong> \u6216 <strong>\u9999\u6e2f\u4e91\u670d\u52a1\u5668<\/strong> \u4e0a\u7684\u4f01\u4e1a\u5e94\u7528\uff0c\u4e5f\u5c06\u7b80\u8981\u4ecb\u7ecd\u4f18\u5316\u90e8\u7f72\u7684\u5b9e\u8df5\u5efa\u8bae\u3002<\/p>\n<hr \/>\n<h2>\u4e00\u3001libpqxx \u5b89\u88c5\u6307\u5357<\/h2>\n<p>\u5728\u5f00\u59cb\u5f00\u53d1\u524d\uff0c\u9700\u8981\u5148\u5b89\u88c5 libpqxx \u5e93\u3002\u4ee5\u4e0b\u662f\u5178\u578b\u7684\u5b89\u88c5\u6b65\u9aa4\uff1a<\/p>\n<pre><code class=\"language-bash\">wget http:\/\/pqxx.org\/download\/software\/libpqxx\/libpqxx-4.0.tar.gz\r\ntar xvfz libpqxx-4.0.tar.gz\r\ncd libpqxx-4.0\r\n.\/configure\r\nmake\r\nmake install\r\n<\/code><\/pre>\n<p>\u5b89\u88c5\u5b8c\u6210\u540e\uff0c\u5efa\u8bae\u786e\u8ba4 PostgreSQL \u5df2\u6b63\u786e\u5b89\u88c5\uff0c\u5e76\u5728 <code>pg_hba.conf<\/code> \u6587\u4ef6\u4e2d\u542f\u7528\u672c\u5730 IPv4 \u8bbf\u95ee\u6743\u9650\uff1a<\/p>\n<pre><code class=\"language-conf\">host    all         all         127.0.0.1\/32          md5\r\n<\/code><\/pre>\n<p>\u7136\u540e\u91cd\u542f PostgreSQL \u670d\u52a1\uff1a<\/p>\n<pre><code class=\"language-bash\">service postgresql restart\r\n<\/code><\/pre>\n<hr \/>\n<h2>\u4e8c\u3001\u8fde\u63a5\u6570\u636e\u5e93\u793a\u4f8b<\/h2>\n<p>\u4f7f\u7528 libpqxx \u53ef\u4ee5\u5feb\u901f\u5b9e\u73b0\u6570\u636e\u5e93\u8fde\u63a5\uff0c\u4ee5\u4e0b\u4ee3\u7801\u5c55\u793a\u4e86\u57fa\u672c\u8fde\u63a5\u65b9\u5f0f\uff1a<\/p>\n<pre><code class=\"language-cpp\">#include &lt;iostream&gt;\r\n#include &lt;pqxx\/pqxx&gt;\r\n\r\nusing namespace std;\r\nusing namespace pqxx;\r\n\r\nint main() {\r\n    try {\r\n        connection C(\"dbname=testdb user=postgres password=123456 hostaddr=127.0.0.1 port=5432\");\r\n        if (C.is_open()) {\r\n            cout &lt;&lt; \"Opened database successfully: \" &lt;&lt; C.dbname() &lt;&lt; endl;\r\n        } else {\r\n            cout &lt;&lt; \"Can't open database\" &lt;&lt; endl;\r\n            return 1;\r\n        }\r\n        C.disconnect();\r\n    } catch (const exception &amp;e) {\r\n        cerr &lt;&lt; e.what() &lt;&lt; endl;\r\n        return 1;\r\n    }\r\n}\r\n<\/code><\/pre>\n<p>\u7f16\u8bd1\u547d\u4ee4\u5982\u4e0b\uff1a<\/p>\n<pre><code class=\"language-bash\">g++ test.cpp -lpqxx -lpq\r\n.\/a.out\r\n<\/code><\/pre>\n<hr \/>\n<h2>\u4e09\u3001\u521b\u5efa\u6570\u636e\u8868\u7684 C++ \u5b9e\u73b0<\/h2>\n<p>\u8fde\u63a5\u6210\u529f\u540e\uff0c\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u65b9\u5f0f\u5728 PostgreSQL \u6570\u636e\u5e93\u4e2d\u521b\u5efa\u8868\uff1a<\/p>\n<pre><code class=\"language-cpp\">char *sql = \"CREATE TABLE COMPANY(\" \\\r\n\"ID INT PRIMARY KEY     NOT NULL,\" \\\r\n\"NAME TEXT NOT NULL,\" \\\r\n\"AGE INT NOT NULL,\" \\\r\n\"ADDRESS CHAR(50),\" \\\r\n\"SALARY REAL );\";\r\n\r\nwork W(C);\r\nW.exec(sql);\r\nW.commit();\r\n<\/code><\/pre>\n<p>\u6267\u884c\u7a0b\u5e8f\u540e\uff0c\u5c06\u521b\u5efa\u540d\u4e3a <code>COMPANY<\/code> \u7684\u6570\u636e\u8868\u5e76\u8fd4\u56de\u786e\u8ba4\u4fe1\u606f\u3002<\/p>\n<hr \/>\n<h2>\u56db\u3001\u6570\u636e\u63d2\u5165\u64cd\u4f5c\u793a\u4f8b<\/h2>\n<p>\u901a\u8fc7 libpqxx\uff0c\u8fd8\u53ef\u4ee5\u9ad8\u6548\u5730\u6279\u91cf\u63d2\u5165\u6570\u636e\uff1a<\/p>\n<pre><code class=\"language-cpp\">char *sql = \"INSERT INTO COMPANY (ID,NAME,AGE,ADDRESS,SALARY) VALUES (1, 'Paul', 32, 'California', 20000.00 );\" \\\r\n\"INSERT INTO COMPANY (ID,NAME,AGE,ADDRESS,SALARY) VALUES (2, 'Allen', 25, 'Texas', 15000.00 );\";\r\n\r\nwork W(C);\r\nW.exec(sql);\r\nW.commit();\r\n<\/code><\/pre>\n<p>\u7a0b\u5e8f\u6267\u884c\u6210\u529f\u540e\u4f1a\u8fd4\u56de\u63d0\u793a\u4fe1\u606f <code>Records created successfully<\/code>\uff0c\u8868\u660e\u6570\u636e\u63d2\u5165\u65e0\u8bef\u3002<\/p>\n<hr \/>\n<h2>\u4e94\u3001\u90e8\u7f72\u5efa\u8bae\uff1a\u9009\u7528\u9ad8\u6027\u80fd\u9999\u6e2f\u670d\u52a1\u5668\u63d0\u5347\u6548\u7387<\/h2>\n<p>\u5bf9\u4e8e\u9700\u8981\u5c06\u6570\u636e\u5e93\u7cfb\u7edf\u90e8\u7f72\u5230\u4e92\u8054\u7f51\u73af\u5883\u4e2d\u7684\u9879\u76ee\u6765\u8bf4\uff0c\u9009\u62e9\u4e00\u6b3e\u7a33\u5b9a\u3001\u9ad8\u901f\u7684\u670d\u52a1\u5668\u5e73\u53f0\u5c24\u4e3a\u91cd\u8981\u3002\u7279\u522b\u662f\u9488\u5bf9\u5728\u4e9a\u592a\u5730\u533a\u5f00\u5c55\u4e1a\u52a1\u7684\u4f01\u4e1a\uff0c\u4f7f\u7528<a href=\"https:\/\/idc.net\/\"><strong>\u9999\u6e2f\u4e91\u670d\u52a1\u5668<\/strong><\/a>\u6216<strong>\u9999\u6e2f\u72ec\u7acb\u670d\u52a1\u5668<\/strong>\u53ef\u4ee5\u5927\u5e45\u63d0\u5347\u8bbf\u95ee\u901f\u5ea6\u548c\u7cfb\u7edf\u7a33\u5b9a\u6027\uff0c\u52a9\u529b\u5f00\u53d1\u8005\u5feb\u901f\u4e0a\u7ebf\u7a33\u5b9a\u7cfb\u7edf\u3002<\/p>\n<hr \/>\n<h2>\u7ed3\u8bed<\/h2>\n<p>\u672c\u6587\u8be6\u7ec6\u4ecb\u7ecd\u4e86\u5982\u4f55\u901a\u8fc7 libpqxx \u5728 C\/C++ \u4e2d\u5b9e\u73b0 PostgreSQL \u6570\u636e\u5e93\u7684\u8fde\u63a5\u3001\u5efa\u8868\u4e0e\u6570\u636e\u64cd\u4f5c\u8fc7\u7a0b\u3002\u901a\u8fc7\u8be5\u65b9\u5f0f\uff0c\u5f00\u53d1\u8005\u53ef\u4ee5\u6784\u5efa\u9ad8\u6027\u80fd\u7684\u6570\u636e\u8bbf\u95ee\u6a21\u5757\uff0c\u5e76\u90e8\u7f72\u4e8e\u9ad8\u53ef\u9760\u7684\u670d\u52a1\u5668\u5e73\u53f0\u4e0a\uff0c\u6253\u9020\u4f01\u4e1a\u7ea7\u5e94\u7528\u7cfb\u7edf\u3002\u5982\u679c\u4f60\u6b63\u5728\u5bfb\u627e\u4e00\u4e2a\u90e8\u7f72 PostgreSQL \u6570\u636e\u5e93\u7684\u9ad8\u7a33\u5b9a\u6027\u73af\u5883\uff0c\u5efa\u8bae\u9009\u62e9 <a href=\"https:\/\/idc.net\/\">\u9999\u6e2f\u4e91\u670d\u52a1\u5668<\/a> \u6216 \u9999\u6e2f\u72ec\u7acb\u670d\u52a1\u5668 \u4ea7\u54c1\uff0c\u83b7\u53d6\u66f4\u5feb\u901f\u7684\u7f51\u7edc\u63a5\u5165\u548c\u66f4\u9ad8\u7684\u6570\u636e\u5b89\u5168\u4fdd\u969c\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5f15\u8a00 \u5728\u73b0\u4ee3\u4f01\u4e1a\u5e94\u7528\u5f00\u53d1\u4e2d\uff0c\u6570\u636e\u5e93\u7684\u9ad8\u6548\u63a5\u5165\u4e0e\u5b89\u5168\u7ba1\u7406\u81f3\u5173\u91cd\u8981\u3002\u5bf9\u4e8e\u9700\u8981\u4f7f\u7528 C\/C++ \u8bed\u8a00\u8fdb\u884c\u9ad8\u6027\u80fd\u540e\u7aef\u5f00 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7038],"tags":[],"class_list":["post-441638","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts\/441638","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/comments?post=441638"}],"version-history":[{"count":0,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts\/441638\/revisions"}],"wp:attachment":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/media?parent=441638"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/categories?post=441638"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/tags?post=441638"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}