{"id":20361,"date":"2024-01-02T04:54:23","date_gmt":"2024-01-02T04:54:23","guid":{"rendered":"https:\/\/server.hk\/blog\/20361\/"},"modified":"2024-11-14T10:39:47","modified_gmt":"2024-11-14T02:39:47","slug":"postgresql-command-call","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/20361\/","title":{"rendered":"PostgreSQL \u6307\u4ee4\uff1aCALL"},"content":{"rendered":"<h1 id=\"postgresql-command-call-pmPhdjTdPW\">PostgreSQL \u6307\u4ee4\uff1aCALL<\/h1>\n<p>PostgreSQL \u662f\u4e00\u500b\u529f\u80fd\u5f37\u5927\u7684\u958b\u6e90\u95dc\u806f\u8cc7\u6599\u5eab\u7ba1\u7406\u7cfb\u7d71\uff0c\u63d0\u4f9b\u5ee3\u6cdb\u7684\u529f\u80fd\u548c\u80fd\u529b\u3002\u5728 PostgreSQL \u4e2d\uff0c\u4e00\u500b\u57fa\u672c\u7684\u6307\u4ee4\u662f <code>CALL<\/code>\uff0c\u5b83\u5141\u8a31\u60a8\u57f7\u884c\u5132\u5b58\u904e\u7a0b\u6216\u51fd\u6578\u3002<\/p>\n<h2 id=\"understanding-stored-procedures-and-functions-pmPhdjTdPW\">\u7406\u89e3\u5132\u5b58\u904e\u7a0b\u548c\u51fd\u6578<\/h2>\n<p>\u5728\u6df1\u5165\u63a2\u8a0e <code>CALL<\/code> \u6307\u4ee4\u7684\u7d30\u7bc0\u4e4b\u524d\uff0c\u4e86\u89e3 PostgreSQL \u4e2d\u5132\u5b58\u904e\u7a0b\u548c\u51fd\u6578\u7684\u6982\u5ff5\u662f\u5f88\u91cd\u8981\u7684\u3002<\/p>\n<p>\u5132\u5b58\u904e\u7a0b\u662f\u4e00\u7d44\u5132\u5b58\u5728\u8cc7\u6599\u5eab\u4e2d\u7684 SQL \u8a9e\u53e5\uff0c\u53ef\u4ee5\u4f5c\u70ba\u4e00\u500b\u55ae\u4f4d\u57f7\u884c\u3002\u5b83\u53ef\u4ee5\u63a5\u53d7\u8f38\u5165\u53c3\u6578\u3001\u57f7\u884c\u8907\u96dc\u8a08\u7b97\u4e26\u8fd4\u56de\u7d50\u679c\u3002\u53e6\u4e00\u65b9\u9762\uff0c\u51fd\u6578\u985e\u4f3c\u65bc\u5132\u5b58\u904e\u7a0b\uff0c\u4f46\u59cb\u7d42\u8fd4\u56de\u4e00\u500b\u503c\u3002<\/p>\n<h2 id=\"using-the-call-command-pmPhdjTdPW\">\u4f7f\u7528 CALL \u6307\u4ee4<\/h2>\n<p>PostgreSQL \u4e2d\u7684 <code>CALL<\/code> \u6307\u4ee4\u7528\u65bc\u57f7\u884c\u5132\u5b58\u904e\u7a0b\u6216\u51fd\u6578\u3002<code>CALL<\/code> \u6307\u4ee4\u7684\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>CALL procedure_name(argument1, argument2, ...);\r\n<\/code><\/pre>\n<p>\u5728\u9019\u88e1\uff0c<code>procedure_name<\/code> \u662f\u60a8\u60f3\u57f7\u884c\u7684\u5132\u5b58\u904e\u7a0b\u6216\u51fd\u6578\u7684\u540d\u7a31\uff0c\u800c <code>argument1, argument2, ...<\/code> \u662f\u8a72\u904e\u7a0b\u6216\u51fd\u6578\u6240\u9700\u7684\u8f38\u5165\u53c3\u6578\u3002<\/p>\n<p>\u8b93\u6211\u5011\u8003\u616e\u4e00\u500b\u793a\u4f8b\uff0c\u6211\u5011\u6709\u4e00\u500b\u540d\u70ba <code>get_customer_details<\/code> \u7684\u5132\u5b58\u904e\u7a0b\uff0c\u5b83\u63a5\u53d7\u4e00\u500b\u5ba2\u6236 ID \u4f5c\u70ba\u8f38\u5165\u53c3\u6578\uff0c\u4e26\u8fd4\u56de\u5ba2\u6236\u7684\u59d3\u540d\u548c\u96fb\u5b50\u90f5\u4ef6\u5730\u5740\uff1a<\/p>\n<pre><code>CREATE OR REPLACE PROCEDURE get_customer_details(customer_id INT)\r\nAS $\r\nDECLARE\r\n    customer_name VARCHAR;\r\n    customer_email VARCHAR;\r\nBEGIN\r\n    SELECT name, email INTO customer_name, customer_email FROM customers WHERE id = customer_id;\r\n    RAISE NOTICE 'Customer Name: %, Email: %', customer_name, customer_email;\r\nEND;\r\n$ LANGUAGE plpgsql;\r\n<\/code><\/pre>\n<p>\u8981\u4f7f\u7528 <code>CALL<\/code> \u6307\u4ee4\u57f7\u884c\u6b64\u5132\u5b58\u904e\u7a0b\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u8a9e\u6cd5\uff1a<\/p>\n<pre><code>CALL get_customer_details(1);\r\n<\/code><\/pre>\n<p>\u9019\u5c07\u57f7\u884c <code>get_customer_details<\/code> \u5132\u5b58\u904e\u7a0b\uff0c\u5ba2\u6236 ID \u70ba 1\uff0c\u4e26\u986f\u793a\u5ba2\u6236\u7684\u59d3\u540d\u548c\u96fb\u5b50\u90f5\u4ef6\u5730\u5740\u3002<\/p>\n<h2 id=\"benefits-of-using-the-call-command-pmPhdjTdPW\">\u4f7f\u7528 CALL \u6307\u4ee4\u7684\u597d\u8655<\/h2>\n<p>PostgreSQL \u4e2d\u7684 <code>CALL<\/code> \u6307\u4ee4\u63d0\u4f9b\u4e86\u5e7e\u500b\u597d\u8655\uff1a<\/p>\n<ul>\n<li><strong>\u4ee3\u78bc\u91cd\u7528\u6027\uff1a<\/strong>\u901a\u904e\u4f7f\u7528\u5132\u5b58\u904e\u7a0b\u548c\u51fd\u6578\uff0c\u60a8\u53ef\u4ee5\u7de8\u5beb\u53ef\u91cd\u7528\u7684\u4ee3\u78bc\uff0c\u9019\u4e9b\u4ee3\u78bc\u53ef\u4ee5\u5f9e\u61c9\u7528\u7a0b\u5e8f\u7684\u591a\u500b\u90e8\u5206\u8abf\u7528\u3002<\/li>\n<li><strong>\u6027\u80fd\u63d0\u5347\uff1a<\/strong>\u5132\u5b58\u904e\u7a0b\u548c\u51fd\u6578\u662f\u9810\u7de8\u8b6f\u4e26\u5132\u5b58\u5728\u8cc7\u6599\u5eab\u4e2d\u7684\uff0c\u57f7\u884c\u901f\u5ea6\u6bd4\u57f7\u884c\u55ae\u500b SQL \u8a9e\u53e5\u66f4\u5feb\u3002<\/li>\n<li><strong>\u6578\u64da\u5b89\u5168\uff1a<\/strong>\u901a\u904e\u5c07\u8907\u96dc\u908f\u8f2f\u5c01\u88dd\u5728\u5132\u5b58\u904e\u7a0b\u548c\u51fd\u6578\u4e2d\uff0c\u60a8\u53ef\u4ee5\u63a7\u5236\u5c0d\u654f\u611f\u6578\u64da\u7684\u8a2a\u554f\uff0c\u4e26\u78ba\u4fdd\u6578\u64da\u7684\u5b8c\u6574\u6027\u3002<\/li>\n<\/ul>\n<h2 id=\"conclusion-pmPhdjTdPW\">\u7d50\u8ad6<\/h2>\n<p>PostgreSQL \u4e2d\u7684 <code>CALL<\/code> \u6307\u4ee4\u662f\u57f7\u884c\u5132\u5b58\u904e\u7a0b\u548c\u51fd\u6578\u7684\u5f37\u5927\u5de5\u5177\u3002\u5b83\u5141\u8a31\u60a8\u5c01\u88dd\u8907\u96dc\u908f\u8f2f\u3001\u63d0\u9ad8\u6027\u80fd\u4e26\u589e\u5f37\u6578\u64da\u5b89\u5168\u6027\u3002\u901a\u904e\u5229\u7528 PostgreSQL \u7684\u80fd\u529b\uff0c\u60a8\u53ef\u4ee5\u69cb\u5efa\u7a69\u5065\u4e14\u9ad8\u6548\u7684\u8cc7\u6599\u5eab\u61c9\u7528\u7a0b\u5e8f\u3002<\/p>\n<h3 id=\"summary-pmPhdjTdPW\">\u7e3d\u7d50\uff1a<\/h3>\n<p>\u7e3d\u800c\u8a00\u4e4b\uff0cPostgreSQL \u4e2d\u7684 <code>CALL<\/code> \u6307\u4ee4\u7528\u65bc\u57f7\u884c\u5132\u5b58\u904e\u7a0b\u548c\u51fd\u6578\u3002\u5b83\u63d0\u4f9b\u4e86\u4ee3\u78bc\u91cd\u7528\u6027\u3001\u6027\u80fd\u63d0\u5347\u548c\u6578\u64da\u5b89\u5168\u6027\u3002\u8981\u4e86\u89e3\u66f4\u591a\u6709\u95dc PostgreSQL \u53ca\u5176\u529f\u80fd\u7684\u4fe1\u606f\uff0c\u8003\u616e\u63a2\u7d22 <a href=\"https:\/\/server.hk\">Server.HK<\/a>\uff0c\u9019\u662f\u4e00\u5bb6\u9818\u5148\u7684 VPS \u4e3b\u6a5f\u516c\u53f8\uff0c\u63d0\u4f9b\u53ef\u9760\u4e14\u53ef\u64f4\u5c55\u7684\u4e3b\u6a5f\u89e3\u6c7a\u65b9\u6848\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>PostgreSQL \u6307\u4ee4\uff1aCA&#46;&#46;&#46;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4924],"tags":[],"class_list":["post-20361","post","type-post","status-publish","format-standard","hentry","category-setup-tutorials"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/20361","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"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=20361"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/20361\/revisions"}],"predecessor-version":[{"id":24394,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/20361\/revisions\/24394"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=20361"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=20361"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=20361"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}