{"id":178626,"date":"2024-11-08T19:32:16","date_gmt":"2024-11-08T11:32:16","guid":{"rendered":"https:\/\/server.hk\/cnblog\/178626\/"},"modified":"2024-11-08T19:32:17","modified_gmt":"2024-11-08T11:32:17","slug":"%e5%a6%82%e4%bd%95%e4%bf%ae%e5%be%a9postgresql%e9%8c%af%e8%aa%a4%e4%bb%a3%e7%a2%bc%ef%bc%9a0100c-dynamic_result_sets_returned%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/178626\/","title":{"rendered":"\u5982\u4f55\u4fee\u5fa9PostgreSQL\u932f\u8aa4\u4ee3\u78bc\uff1a0100C &#8211; dynamic_result_sets_returned\uff1f"},"content":{"rendered":"<h1 id=\"%e5%a6%82%e4%bd%95%e4%bf%ae%e5%be%a9postgresql%e9%8c%af%e8%aa%a4%e4%bb%a3%e7%a2%bc%ef%bc%9a0100c-dynamic_result_sets_returned-dnlGclHQnu\">\u5982\u4f55\u4fee\u5fa9PostgreSQL\u932f\u8aa4\u4ee3\u78bc\uff1a0100C &#8211; dynamic_result_sets_returned<\/h1>\n<p>\u5728\u4f7f\u7528PostgreSQL\u6578\u64da\u5eab\u6642\uff0c\u958b\u767c\u8005\u53ef\u80fd\u6703\u9047\u5230\u5404\u7a2e\u932f\u8aa4\u4ee3\u78bc\uff0c\u5176\u4e2d\u4e4b\u4e00\u662f\u932f\u8aa4\u4ee3\u78bc0100C\uff0c\u8a72\u932f\u8aa4\u901a\u5e38\u8868\u793a\u201cdynamic result sets returned\u201d\u3002\u9019\u610f\u5473\u8457\u5728\u57f7\u884c\u67d0\u4e9b\u67e5\u8a62\u6642\uff0cPostgreSQL\u8fd4\u56de\u4e86\u52d5\u614b\u7d50\u679c\u96c6\uff0c\u9019\u53ef\u80fd\u6703\u5c0e\u81f4\u61c9\u7528\u7a0b\u5e8f\u7121\u6cd5\u6b63\u78ba\u8655\u7406\u7d50\u679c\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-dnlGclHQnu\">\u932f\u8aa4\u539f\u56e0\u5206\u6790<\/h2>\n<p>PostgreSQL\u7684\u932f\u8aa4\u4ee3\u78bc0100C\u901a\u5e38\u51fa\u73fe\u5728\u4ee5\u4e0b\u60c5\u6cc1\uff1a<\/p>\n<ul>\n<li>\u4f7f\u7528\u4e86\u4e0d\u652f\u6301\u7684\u67e5\u8a62\u985e\u578b\uff0c\u4f8b\u5982\u5728\u67d0\u4e9b\u4e0a\u4e0b\u6587\u4e2d\u4f7f\u7528\u4e86\u8fd4\u56de\u7d50\u679c\u96c6\u7684\u5b58\u5132\u904e\u7a0b\u3002<\/li>\n<li>\u61c9\u7528\u7a0b\u5e8f\u672a\u6b63\u78ba\u8655\u7406\u8fd4\u56de\u7684\u7d50\u679c\u96c6\uff0c\u7279\u5225\u662f\u5728\u4f7f\u7528JDBC\u6216\u5176\u4ed6\u6578\u64da\u5eab\u9a45\u52d5\u6642\u3002<\/li>\n<li>\u6578\u64da\u5eab\u9023\u63a5\u914d\u7f6e\u4e0d\u6b63\u78ba\uff0c\u5c0e\u81f4\u7121\u6cd5\u6b63\u78ba\u63a5\u6536\u7d50\u679c\u96c6\u3002<\/li>\n<\/ul>\n<p>\u4e86\u89e3\u9019\u4e9b\u539f\u56e0\u5f8c\uff0c\u6211\u5011\u53ef\u4ee5\u91dd\u5c0d\u6027\u5730\u9032\u884c\u4fee\u5fa9\u3002<\/p>\n<h2 id=\"%e8%a7%a3%e6%b1%ba%e6%96%b9%e6%a1%88-dnlGclHQnu\">\u89e3\u6c7a\u65b9\u6848<\/h2>\n<h3 id=\"1-%e6%aa%a2%e6%9f%a5%e6%9f%a5%e8%a9%a2%e9%a1%9e%e5%9e%8b-dnlGclHQnu\">1. \u6aa2\u67e5\u67e5\u8a62\u985e\u578b<\/h3>\n<p>\u9996\u5148\uff0c\u78ba\u4fdd\u60a8\u57f7\u884c\u7684\u67e5\u8a62\u662f\u6b63\u78ba\u7684\u3002\u5982\u679c\u60a8\u5728\u4f7f\u7528\u5b58\u5132\u904e\u7a0b\uff0c\u8acb\u6aa2\u67e5\u8a72\u904e\u7a0b\u662f\u5426\u8a2d\u7f6e\u70ba\u8fd4\u56de\u7d50\u679c\u96c6\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u793a\u4f8b\uff1a<\/p>\n<pre><code>CREATE OR REPLACE FUNCTION get_users()\nRETURNS SETOF users AS $$\nBEGIN\n    RETURN QUERY SELECT * FROM users;\nEND;\n$$ LANGUAGE plpgsql;<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u51fd\u6578`get_users`\u8fd4\u56de\u4e86\u4e00\u500b\u7528\u6236\u7684\u7d50\u679c\u96c6\u3002\u5982\u679c\u60a8\u5728\u8abf\u7528\u6b64\u51fd\u6578\u6642\u9047\u5230\u932f\u8aa4\uff0c\u8acb\u6aa2\u67e5\u8abf\u7528\u65b9\u5f0f\u662f\u5426\u6b63\u78ba\u3002<\/p>\n<h3 id=\"2-%e6%ad%a3%e7%a2%ba%e8%99%95%e7%90%86%e7%b5%90%e6%9e%9c%e9%9b%86-dnlGclHQnu\">2. \u6b63\u78ba\u8655\u7406\u7d50\u679c\u96c6<\/h3>\n<p>\u5982\u679c\u60a8\u4f7f\u7528\u7684\u662fJDBC\uff0c\u8acb\u78ba\u4fdd\u60a8\u7684\u4ee3\u78bc\u80fd\u5920\u6b63\u78ba\u8655\u7406\u8fd4\u56de\u7684\u7d50\u679c\u96c6\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684JDBC\u793a\u4f8b\uff1a<\/p>\n<pre><code>Connection conn = DriverManager.getConnection(\"jdbc:postgresql:\/\/localhost:5432\/mydb\", \"user\", \"password\");\nCallableStatement stmt = conn.prepareCall(\"{call get_users()}\");\nboolean hasResults = stmt.execute();\n\nwhile (hasResults) {\n    ResultSet rs = stmt.getResultSet();\n    while (rs.next()) {\n        System.out.println(\"User: \" + rs.getString(\"username\"));\n    }\n    hasResults = stmt.getMoreResults();\n}\nstmt.close();\nconn.close();<\/code><\/pre>\n<p>\u5728\u9019\u6bb5\u4ee3\u78bc\u4e2d\uff0c\u6211\u5011\u4f7f\u7528`CallableStatement`\u4f86\u8abf\u7528\u5b58\u5132\u904e\u7a0b\uff0c\u4e26\u6b63\u78ba\u8655\u7406\u4e86\u591a\u500b\u7d50\u679c\u96c6\u3002<\/p>\n<h3 id=\"3-%e6%aa%a2%e6%9f%a5%e6%95%b8%e6%93%9a%e5%ba%ab%e9%80%a3%e6%8e%a5%e9%85%8d%e7%bd%ae-dnlGclHQnu\">3. \u6aa2\u67e5\u6578\u64da\u5eab\u9023\u63a5\u914d\u7f6e<\/h3>\n<p>\u6700\u5f8c\uff0c\u6aa2\u67e5\u60a8\u7684\u6578\u64da\u5eab\u9023\u63a5\u914d\u7f6e\u3002\u78ba\u4fdd\u60a8\u4f7f\u7528\u7684\u9a45\u52d5\u7a0b\u5e8f\u7248\u672c\u8207PostgreSQL\u7248\u672c\u517c\u5bb9\uff0c\u4e26\u4e14\u9023\u63a5\u5b57\u7b26\u4e32\u6b63\u78ba\u7121\u8aa4\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u793a\u4f8b\u9023\u63a5\u5b57\u7b26\u4e32\uff1a<\/p>\n<pre><code>jdbc:postgresql:\/\/localhost:5432\/mydb?user=user&amp;password=password<\/code><\/pre>\n<p>\u5982\u679c\u9023\u63a5\u914d\u7f6e\u4e0d\u6b63\u78ba\uff0c\u53ef\u80fd\u6703\u5c0e\u81f4\u7121\u6cd5\u63a5\u6536\u7d50\u679c\u96c6\uff0c\u5f9e\u800c\u5f15\u767c\u932f\u8aa4\u4ee3\u78bc0100C\u3002<\/p>\n<h2 id=\"%e7%b8%bd%e7%b5%90-dnlGclHQnu\">\u7e3d\u7d50<\/h2>\n<p>PostgreSQL\u932f\u8aa4\u4ee3\u78bc0100C &#8211; dynamic result sets returned\u901a\u5e38\u8207\u67e5\u8a62\u985e\u578b\u3001\u7d50\u679c\u96c6\u8655\u7406\u6216\u6578\u64da\u5eab\u9023\u63a5\u914d\u7f6e\u6709\u95dc\u3002\u901a\u904e\u6aa2\u67e5\u67e5\u8a62\u3001\u6b63\u78ba\u8655\u7406\u7d50\u679c\u96c6\u4ee5\u53ca\u78ba\u4fdd\u9023\u63a5\u914d\u7f6e\u6b63\u78ba\uff0c\u60a8\u53ef\u4ee5\u6709\u6548\u5730\u4fee\u5fa9\u6b64\u932f\u8aa4\u3002\u5982\u679c\u60a8\u9700\u8981\u9032\u4e00\u6b65\u7684\u652f\u6301\u6216\u5c0b\u627e\u9ad8\u6548\u7684\u89e3\u6c7a\u65b9\u6848\uff0c\u8003\u616e\u4f7f\u7528<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u670d\u52d9\uff0c\u4ee5\u7372\u5f97\u66f4\u7a69\u5b9a\u7684\u6578\u64da\u5eab\u904b\u884c\u74b0\u5883\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3\u5982\u4f55\u4fee\u5fa9PostgreSQL\u932f\u8aa4\u4ee3\u78bc0100C\uff0c\u89e3\u6c7a\u52d5\u614b\u7d50\u679c\u96c6\u8fd4\u56de\u554f\u984c\uff0c\u63d0\u5347\u6578\u64da\u5eab\u6027\u80fd\u8207\u7a69\u5b9a\u6027\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-178626","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/178626","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=178626"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/178626\/revisions"}],"predecessor-version":[{"id":178627,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/178626\/revisions\/178627"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=178626"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=178626"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=178626"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}