{"id":20359,"date":"2024-01-02T04:52:27","date_gmt":"2024-01-02T04:52:27","guid":{"rendered":"https:\/\/server.hk\/blog\/20359\/"},"modified":"2024-11-14T10:39:49","modified_gmt":"2024-11-14T02:39:49","slug":"postgresql-command-create-procedure","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/20359\/","title":{"rendered":"PostgreSQL \u547d\u4ee4\uff1aCREATE PROCEDURE"},"content":{"rendered":"<h1 id=\"postgresql-command-create-procedure-XEpBPbwWvT\">PostgreSQL \u547d\u4ee4\uff1aCREATE PROCEDURE<\/h1>\n<p>PostgreSQL \u662f\u4e00\u500b\u529f\u80fd\u5f37\u5927\u7684\u958b\u6e90\u95dc\u806f\u5f0f\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\uff0c\u63d0\u4f9b\u591a\u7a2e\u529f\u80fd\u548c\u5be6\u7528\u6027\u3002\u5176\u4e2d\u4e00\u500b\u91cd\u8981\u7684\u529f\u80fd\u662f\u4f7f\u7528 <code>CREATE PROCEDURE<\/code> \u547d\u4ee4\u5275\u5efa\u5132\u5b58\u904e\u7a0b\u3002\u5728\u672c\u6587\u4e2d\uff0c\u6211\u5011\u5c07\u63a2\u8a0e PostgreSQL \u4e2d\u7684 <code>CREATE PROCEDURE<\/code> \u547d\u4ee4\uff0c\u4e26\u4e86\u89e3\u5982\u4f55\u4f7f\u7528\u5b83\u4f86\u63d0\u5347\u6578\u64da\u5eab\u7684\u529f\u80fd\u3002<\/p>\n<h2 id=\"what-is-a-stored-procedure-XEpBPbwWvT\">\u4ec0\u9ebc\u662f\u5132\u5b58\u904e\u7a0b\uff1f<\/h2>\n<p>\u5132\u5b58\u904e\u7a0b\u662f\u4e00\u7d44\u5b58\u5132\u5728\u6578\u64da\u5eab\u4e2d\u7684 SQL \u8a9e\u53e5\uff0c\u53ef\u4ee5\u4f5c\u70ba\u4e00\u500b\u55ae\u4f4d\u57f7\u884c\u3002\u5b83\u5141\u8a31\u60a8\u5c07\u8907\u96dc\u7684\u696d\u52d9\u908f\u8f2f\u548c\u7d93\u5e38\u4f7f\u7528\u7684\u64cd\u4f5c\u5c01\u88dd\u5230\u53ef\u91cd\u7528\u548c\u6a21\u584a\u5316\u7684\u4ee3\u78bc\u584a\u4e2d\u3002\u5132\u5b58\u904e\u7a0b\u63d0\u4f9b\u4e86\u5e7e\u500b\u512a\u9ede\uff0c\u5305\u62ec\u63d0\u5347\u6027\u80fd\u3001\u4ee3\u78bc\u91cd\u7528\u6027\u548c\u589e\u5f37\u5b89\u5168\u6027\u3002<\/p>\n<h2 id=\"creating-a-procedure-in-postgresql-XEpBPbwWvT\">\u5728 PostgreSQL \u4e2d\u5275\u5efa\u5132\u5b58\u904e\u7a0b<\/h2>\n<p>PostgreSQL \u4e2d\u7684 <code>CREATE PROCEDURE<\/code> \u547d\u4ee4\u5141\u8a31\u60a8\u5b9a\u7fa9\u4e00\u500b\u65b0\u7684\u5132\u5b58\u904e\u7a0b\u3002\u4ee5\u4e0b\u662f\u57fa\u672c\u8a9e\u6cd5\uff1a<\/p>\n<pre><code>CREATE PROCEDURE procedure_name ([parameter_list])\r\n    LANGUAGE language_name\r\n    [ [NOT] LEAKPROOF ]\r\n    [ [NOT] SECURED ]\r\n    [ [NOT] CALLED ON NULL INPUT ]\r\n    [ [NOT] RETURNS NULL ON NULL INPUT ]\r\n    [ [CONTAINS SQL | NO SQL | READS SQL DATA | MODIFIES SQL DATA] ]\r\n    [ SQL DATA ACCESS {CONTAINS SQL | NO SQL | READS SQL DATA | MODIFIES SQL DATA} ]\r\n    [ [DEFINER | INVOKER] SECURITY {DEFINER | INVOKER} ]\r\n    [ [SET] configuration_parameter { TO | = } { value | DEFAULT } ]\r\n    [ AS 'definition' ]\r\n<\/code><\/pre>\n<p>\u6211\u5011\u4f86\u9010\u4e00\u89e3\u91cb <code>CREATE PROCEDURE<\/code> \u547d\u4ee4\u7684\u5404\u500b\u90e8\u5206\uff1a<\/p>\n<ul>\n<li><code>procedure_name<\/code>\uff1a\u5132\u5b58\u904e\u7a0b\u7684\u540d\u7a31\u3002<\/li>\n<li><code>parameter_list<\/code>\uff1a\u5132\u5b58\u904e\u7a0b\u7684\u8f38\u5165\u53c3\u6578\u5217\u8868\u3002<\/li>\n<li><code>LANGUAGE language_name<\/code>\uff1a\u5b9a\u7fa9\u5132\u5b58\u904e\u7a0b\u4f7f\u7528\u7684\u7de8\u7a0b\u8a9e\u8a00\u3002PostgreSQL \u652f\u63f4\u591a\u7a2e\u8a9e\u8a00\uff0c\u5305\u62ec SQL\u3001PL\/pgSQL\u3001PL\/Python\u3001PL\/Perl \u7b49\u3002<\/li>\n<li><code>LEAKPROOF<\/code>\uff1a\u6307\u5b9a\u5132\u5b58\u904e\u7a0b\u662f\u5426\u6703\u5167\u5b58\u6d29\u6f0f\u3002<\/li>\n<li><code>SECURED<\/code>\uff1a\u6307\u5b9a\u5132\u5b58\u904e\u7a0b\u662f\u5426\u5b89\u5168\u3002<\/li>\n<li><code>CALLED ON NULL INPUT<\/code>\uff1a\u6307\u5b9a\u7576\u8f38\u5165\u53c3\u6578\u70ba <code>NULL<\/code> \u6642\uff0c\u662f\u5426\u57f7\u884c\u5132\u5b58\u904e\u7a0b\u3002<\/li>\n<li><code>RETURNS NULL ON NULL INPUT<\/code>\uff1a\u6307\u5b9a\u7576\u8f38\u5165\u53c3\u6578\u70ba <code>NULL<\/code> \u6642\uff0c\u5132\u5b58\u904e\u7a0b\u662f\u5426\u8fd4\u56de <code>NULL<\/code>\u3002<\/li>\n<li><code>CONTAINS SQL | NO SQL | READS SQL DATA | MODIFIES SQL DATA<\/code>\uff1a\u6307\u5b9a\u5132\u5b58\u904e\u7a0b\u7684 SQL \u7279\u6027\u3002<\/li>\n<li><code>SQL DATA ACCESS {CONTAINS SQL | NO SQL | READS SQL DATA | MODIFIES SQL DATA}<\/code>\uff1a\u6307\u5b9a\u5132\u5b58\u904e\u7a0b\u7684\u6578\u64da\u8a2a\u554f\u7279\u6027\u3002<\/li>\n<li><code>DEFINER | INVOKER SECURITY {DEFINER | INVOKER}<\/code>\uff1a\u6307\u5b9a\u57f7\u884c\u5132\u5b58\u904e\u7a0b\u7684\u5b89\u5168\u4e0a\u4e0b\u6587\u3002<\/li>\n<li><code>configuration_parameter { TO | = } { value | DEFAULT }<\/code>\uff1a\u6307\u5b9a\u5132\u5b58\u904e\u7a0b\u7684\u914d\u7f6e\u53c3\u6578\u3002<\/li>\n<li><code>AS 'definition'<\/code>\uff1a\u5132\u5b58\u904e\u7a0b\u7684\u5b9a\u7fa9\uff0c\u5176\u4e2d\u5305\u62ec SQL \u8a9e\u53e5\u3002<\/li>\n<\/ul>\n<h2 id=\"example-XEpBPbwWvT\">\u7bc4\u4f8b<\/h2>\n<p>\u8b93\u6211\u5011\u8003\u616e\u4e00\u500b\u7bc4\u4f8b\uff0c\u6211\u5011\u60f3\u5275\u5efa\u4e00\u500b\u8a08\u7b97\u6307\u5b9a\u90e8\u9580\u54e1\u5de5\u5e73\u5747\u85aa\u8cc7\u7684\u5132\u5b58\u904e\u7a0b\u3002\u4ee5\u4e0b\u662f\u4f7f\u7528 <code>CREATE PROCEDURE<\/code> \u547d\u4ee4\u7684\u65b9\u5f0f\uff1a<\/p>\n<pre><code>CREATE PROCEDURE calculate_average_salary (department_id INT)\r\n    LANGUAGE SQL\r\nAS\r\n$$\r\n    SELECT AVG(salary) FROM employees WHERE department_id = $1;\r\n$$\r\n<\/code><\/pre>\n<p>\u5728\u9019\u500b\u7bc4\u4f8b\u4e2d\uff0c\u6211\u5011\u5275\u5efa\u4e86\u4e00\u500b\u540d\u70ba <code>calculate_average_salary<\/code> \u7684\u5132\u5b58\u904e\u7a0b\uff0c\u5b83\u63a5\u53d7\u4e00\u500b\u8f38\u5165\u53c3\u6578 <code>department_id<\/code>\u3002\u8a72\u904e\u7a0b\u4f7f\u7528 SQL \u8a9e\u8a00\uff0c\u4e26\u901a\u904e <code>AVG<\/code> \u51fd\u6578\u8a08\u7b97\u6307\u5b9a\u90e8\u9580\u54e1\u5de5\u7684\u5e73\u5747\u85aa\u8cc7\u3002<\/p>\n<h2 id=\"summary-XEpBPbwWvT\">\u7e3d\u7d50<\/h2>\n<p>PostgreSQL \u4e2d\u7684 <code>CREATE PROCEDURE<\/code> \u547d\u4ee4\u5141\u8a31\u60a8\u5275\u5efa\u5132\u5b58\u904e\u7a0b\uff0c\u9019\u4e9b\u904e\u7a0b\u662f\u53ef\u91cd\u7528\u548c\u6a21\u584a\u5316\u7684\u4ee3\u78bc\u584a\uff0c\u7528\u65bc\u5c01\u88dd\u8907\u96dc\u7684\u696d\u52d9\u908f\u8f2f\u3002\u5132\u5b58\u904e\u7a0b\u63d0\u4f9b\u4e86\u591a\u9805\u512a\u52e2\uff0c\u5305\u62ec\u63d0\u5347\u6027\u80fd\u3001\u4ee3\u78bc\u91cd\u7528\u6027\u548c\u589e\u5f37\u5b89\u5168\u6027\u3002\u901a\u904e\u5229\u7528\u5132\u5b58\u904e\u7a0b\u7684\u5f37\u5927\u529f\u80fd\uff0c\u60a8\u53ef\u4ee5\u63d0\u5347 PostgreSQL \u6578\u64da\u5eab\u7684\u529f\u80fd\uff0c\u4e26\u7c21\u5316\u61c9\u7528\u7a0b\u5f0f\u7684\u958b\u767c\u904e\u7a0b\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u53ef\u9760\u4e14\u9ad8\u6027\u80fd\u7684 VPS \u4e3b\u6a5f\u89e3\u6c7a\u65b9\u6848\uff0c\u8acb\u8003\u616e <a href=\"https:\/\/server.hk\">Server.HK<\/a>\u3002\u900f\u904e\u591a\u6a23\u5316\u7684\u4e3b\u6a5f\u8a08\u5283\u548c\u512a\u79c0\u7684\u5ba2\u6236\u652f\u6301\uff0cServer.HK \u662f\u60a8\u4e3b\u6a5f\u9700\u6c42\u7684\u7406\u60f3\u9078\u64c7\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>PostgreSQL \u547d\u4ee4\uff1aCR&#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-20359","post","type-post","status-publish","format-standard","hentry","category-setup-tutorials"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/20359","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=20359"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/20359\/revisions"}],"predecessor-version":[{"id":24396,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/20359\/revisions\/24396"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=20359"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=20359"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=20359"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}