{"id":20762,"date":"2024-01-02T05:31:21","date_gmt":"2024-01-02T05:31:21","guid":{"rendered":"https:\/\/server.hk\/blog\/20762\/"},"modified":"2024-11-14T10:39:09","modified_gmt":"2024-11-14T02:39:09","slug":"postgresql-command-create-language","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/20762\/","title":{"rendered":"PostgreSQL \u6307\u4ee4\uff1aCREATE LANGUAGE"},"content":{"rendered":"

PostgreSQL \u6307\u4ee4\uff1aCREATE LANGUAGE<\/h1>\n

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\u7279\u6027\u3002PostgreSQL \u7684\u4e00\u500b\u95dc\u9375\u7279\u6027\u662f\u5176\u652f\u6301\u591a\u7a2e\u7de8\u7a0b\u8a9e\u8a00\u7684\u80fd\u529b\u3002\u901a\u904e CREATE LANGUAGE \u6307\u4ee4\uff0c\u7528\u6236\u53ef\u4ee5\u5c07\u65b0\u7684\u7de8\u7a0b\u8a9e\u8a00\u6dfb\u52a0\u5230\u4ed6\u5011\u7684 PostgreSQL \u8cc7\u6599\u5eab\u4e2d\uff0c\u5141\u8a31\u4ed6\u5011\u4f7f\u7528\u9664\u4e86\u9810\u8a2d\u7684 PL\/pgSQL \u4e4b\u5916\u7684\u8a9e\u8a00\u4f86\u7de8\u5beb\u5132\u5b58\u904e\u7a0b\u3001\u51fd\u6578\u548c\u89f8\u767c\u5668\u3002<\/p>\n

\u70ba\u4ec0\u9ebc\u4f7f\u7528 CREATE LANGUAGE\uff1f<\/h2>\n

PostgreSQL \u4e2d\u7684 CREATE LANGUAGE \u6307\u4ee4\u70ba\u958b\u767c\u8005\u548c\u8cc7\u6599\u5eab\u7ba1\u7406\u54e1\u63d0\u4f9b\u4e86\u9748\u6d3b\u6027\u548c\u64f4\u5c55\u6027\u3002\u901a\u904e\u6dfb\u52a0\u65b0\u7684\u7de8\u7a0b\u8a9e\u8a00\uff0c\u7528\u6236\u53ef\u4ee5\u5229\u7528\u4ed6\u5011\u5728\u4e0d\u540c\u8a9e\u8a00\u4e2d\u7684\u73fe\u6709\u77e5\u8b58\u548c\u6280\u80fd\u4f86\u7de8\u5beb\u8cc7\u6599\u5eab\u51fd\u6578\u548c\u904e\u7a0b\u3002\u9019\u5141\u8a31\u66f4\u9ad8\u7684\u4ee3\u78bc\u91cd\u7528\u6027\uff0c\u4e26\u80fd\u5920\u4f7f\u7528\u66f4\u9069\u5408\u7279\u5b9a\u4efb\u52d9\u7684\u8a9e\u8a00\u3002<\/p>\n

\u4f8b\u5982\uff0c\u5982\u679c\u4e00\u4f4d\u958b\u767c\u8005\u5c0d Python \u66f4\u70ba\u719f\u6089\uff0c\u4ed6\u5011\u53ef\u4ee5\u4f7f\u7528 CREATE LANGUAGE \u6307\u4ee4\u5c07 PL\/Python \u8a9e\u8a00\u6dfb\u52a0\u5230\u5176 PostgreSQL \u8cc7\u6599\u5eab\u4e2d\u3002\u9019\u4f7f\u4ed6\u5011\u80fd\u5920\u7528 Python \u7de8\u5beb\u5132\u5b58\u904e\u7a0b\u548c\u51fd\u6578\uff0c\u5229\u7528\u5176\u8c50\u5bcc\u7684\u5eab\u548c\u751f\u614b\u7cfb\u7d71\u3002<\/p>\n

\u5982\u4f55\u4f7f\u7528 CREATE LANGUAGE<\/h2>\n

CREATE LANGUAGE \u6307\u4ee4\u7684\u8a9e\u6cd5\u975e\u5e38\u7c21\u55ae\uff1a<\/p>\n

CREATE LANGUAGE language_name;\r\n<\/code><\/pre>\n
\u9019\u88e1\uff0clanguage_name<\/code> \u6307\u7684\u662f\u60a8\u60f3\u8981\u6dfb\u52a0\u5230 PostgreSQL \u8cc7\u6599\u5eab\u4e2d\u7684\u7de8\u7a0b\u8a9e\u8a00\u7684\u540d\u7a31\u3002PostgreSQL \u652f\u6301\u591a\u7a2e\u8a9e\u8a00\uff0c\u5305\u62ec PL\/pgSQL\u3001PL\/Python\u3001PL\/Perl\u3001PL\/Tcl \u7b49\u3002<\/p>\n
\u5047\u8a2d\u6211\u5011\u60f3\u5c07 PL\/Python \u8a9e\u8a00\u6dfb\u52a0\u5230\u6211\u5011\u7684\u8cc7\u6599\u5eab\u3002\u6211\u5011\u53ef\u4ee5\u57f7\u884c\u4ee5\u4e0b\u6307\u4ee4\uff1a<\/p>\n
CREATE LANGUAGE plpythonu;\r\n<\/code><\/pre>\n
\u9019\u689d\u6307\u4ee4\u5c07 PL\/Python \u8a9e\u8a00\u6dfb\u52a0\u5230\u8cc7\u6599\u5eab\u4e2d\uff0c\u8b93\u6211\u5011\u80fd\u5920\u7528 Python \u7de8\u5beb\u5132\u5b58\u904e\u7a0b\u548c\u51fd\u6578\u3002<\/p>\n
\u7bc4\u4f8b\uff1a\u4f7f\u7528 PL\/Python<\/h2>\n
\u4e00\u65e6\u6211\u5011\u5c07 PL\/Python \u8a9e\u8a00\u6dfb\u52a0\u5230 PostgreSQL \u8cc7\u6599\u5eab\u4e2d\uff0c\u6211\u5011\u5c31\u53ef\u4ee5\u958b\u59cb\u7528 Python \u7de8\u5beb\u51fd\u6578\u548c\u904e\u7a0b\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u7bc4\u4f8b\uff1a<\/p>\n
CREATE OR REPLACE FUNCTION calculate_average(a integer, b integer)\r\n  RETURNS float AS\r\n$\r\n  return (a + b) \/ 2.0\r\n$\r\nLANGUAGE plpythonu;\r\n<\/code><\/pre>\n
\u5728\u9019\u500b\u7bc4\u4f8b\u4e2d\uff0c\u6211\u5011\u5275\u5efa\u4e86\u4e00\u500b\u540d\u70ba calculate_average<\/code> \u7684\u51fd\u6578\uff0c\u5b83\u63a5\u53d7\u5169\u500b\u6574\u6578\u4f5c\u70ba\u8f38\u5165\uff0c\u4e26\u8fd4\u56de\u5b83\u5011\u7684\u5e73\u5747\u503c\uff0c\u985e\u578b\u70ba float\u3002\u8a72\u51fd\u6578\u662f\u7528 Python \u7de8\u5beb\u7684\uff0c\u9019\u8981\u6b78\u529f\u65bc\u6211\u5011\u4e4b\u524d\u6dfb\u52a0\u7684 PL\/Python \u8a9e\u8a00\u3002<\/p>\n
\u7e3d\u7d50<\/h2>\n
PostgreSQL \u4e2d\u7684 CREATE LANGUAGE \u6307\u4ee4\u5141\u8a31\u7528\u6236\u5c07\u65b0\u7684\u7de8\u7a0b\u8a9e\u8a00\u6dfb\u52a0\u5230\u5176\u8cc7\u6599\u5eab\u4e2d\uff0c\u63d0\u4f9b\u9748\u6d3b\u6027\u548c\u64f4\u5c55\u6027\u3002\u901a\u904e\u6dfb\u52a0\u50cf PL\/Python \u9019\u6a23\u7684\u8a9e\u8a00\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u7528\u4ed6\u5011\u66f4\u719f\u6089\u7684\u8a9e\u8a00\u7de8\u5beb\u5132\u5b58\u904e\u7a0b\u548c\u51fd\u6578\uff0c\u589e\u5f37\u4ee3\u78bc\u7684\u91cd\u7528\u6027\uff0c\u4e26\u5229\u7528\u4e0d\u540c\u7de8\u7a0b\u8a9e\u8a00\u7684\u512a\u52e2\u3002<\/p>\n
\u5982\u679c\u60a8\u6709\u8208\u8da3\u63a2\u7d22 PostgreSQL \u7684\u529f\u80fd\uff0c\u4e26\u5e0c\u671b\u5229\u7528\u5176\u5c0d\u591a\u7a2e\u7de8\u7a0b\u8a9e\u8a00\u7684\u652f\u6301\uff0c\u8acb\u8003\u616e Server.HK<\/a> \u63d0\u4f9b\u7684\u53ef\u9760\u548c\u9ad8\u6548\u80fd\u7684 VPS \u4e3b\u6a5f\u89e3\u6c7a\u65b9\u6848\u3002\u4f7f\u7528 Server.HK\uff0c\u60a8\u53ef\u4ee5\u5728\u5b89\u5168\u548c\u512a\u5316\u7684\u74b0\u5883\u4e2d\u9ad4\u9a57 PostgreSQL \u7684\u5f37\u5927\u548c\u9748\u6d3b\u6027\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
PostgreSQL \u6307\u4ee4\uff1aCR...<\/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-20762","post","type-post","status-publish","format-standard","hentry","category-setup-tutorials"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/20762","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=20762"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/20762\/revisions"}],"predecessor-version":[{"id":24350,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/20762\/revisions\/24350"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=20762"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=20762"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=20762"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}