{"id":44739,"date":"2024-01-13T11:59:21","date_gmt":"2023-12-09T09:06:22","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e4%bd%bf%e7%94%a8go%e8%af%ad%e8%a8%80%e6%93%8d%e4%bd%9cpostgresql%e3%80%82\/"},"modified":"2024-05-04T18:13:12","modified_gmt":"2024-05-04T10:13:12","slug":"%e4%bd%bf%e7%94%a8go%e8%af%ad%e8%a8%80%e6%93%8d%e4%bd%9cpostgresql%e3%80%82","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e4%bd%bf%e7%94%a8go%e8%af%ad%e8%a8%80%e6%93%8d%e4%bd%9cpostgresql%e3%80%82\/","title":{"rendered":"\u4f7f\u7528Go\u8bed\u8a00\u64cd\u4f5cPostgreSQL"},"content":{"rendered":"

\u7531\u4e8e\u6709\u673a\u4f1a\u5728golang\u4e2d\u64cd\u4f5cpostgres\u800c\u6ca1\u6709\u4f7f\u7528ORM\uff0c\u6211\u5b66\u5230\u4e86\u5f88\u591a\u4e1c\u897f\uff0c\u6240\u4ee5\u60f3\u6574\u7406\u4e00\u4e0b\u5e76\u5206\u4eab\u3002<\/p>\n

\u4f7f\u7528\u56fe\u4e66\u9986<\/h1>\n

github.com\/lib\/pq \u6570\u636e\u5e93 \/ sql<\/p>\n

\u6392\u5217<\/h1>\n

\u5728PostgreSQL\u4e2d\uff0c\u5b58\u5728\u6570\u7ec4\u7c7b\u578b\uff0c\u53ef\u4ee5\u7075\u6d3b\u5730\u64cd\u4f5c\u591a\u4e2a\u503c\u3002
\n\u901a\u8fc7\u805a\u5408\u51fd\u6570\uff0c\u53ef\u4ee5\u5c06\u5339\u914d\u7684\u503c\u8f6c\u6362\u4e3a\u6570\u7ec4\u5e76\u4f7f\u7528DISTINCT\u83b7\u53d6\u552f\u4e00\u503c\u7684\u6570\u7ec4\uff08\u901f\u5ea6\u4e0d\u4fdd\u8bc1\uff09\u3002<\/p>\n

\u5982\u679c\u4f7f\u7528 golang \u8fdb\u884c\u7f16\u5199\u7684\u8bdd\uff0c\u4ee5\u4e0b\u662f\u76f8\u5e94\u7684\u65b9\u5f0f\u3002<\/p>\n

targetIds<\/span> =<\/span> []<\/span>int<\/span>{<\/span>400<\/span>,<\/span>500<\/span>}<\/span>\r\n\/\/ query\u306b\u914d\u5217\u3092\u57cb\u3081\u8fbc\u3080<\/span>\r\ndb<\/span>.<\/span>Query<\/span>(<\/span>`SELECT * FROM t WHERE id = ANY($1)`<\/span>,<\/span> pq<\/span>.<\/span>Array<\/span>(<\/span>targetIds<\/span>))<\/span>\r\n\r\n\/\/ query\u7d50\u679c\u3092\u914d\u5217\u306b\u5909\u63db\u3059\u308b<\/span>\r\nvar<\/span> x<\/span> []<\/span>sql<\/span>.<\/span>NullInt64<\/span>\r\ndb<\/span>.<\/span>QueryRow<\/span>(<\/span>`SELECT ARRAY[235, 401]`<\/span>)<\/span>.<\/span>Scan<\/span>(<\/span>pq<\/span>.<\/span>Array<\/span>(<\/span>&<\/span>x<\/span>))<\/span>\r\n<\/code><\/pre>\n
\u5728Golang\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528pg.Array\u51fd\u6570\u8f7b\u677e\u5730\u5c06\u6570\u7ec4\u4e0e\u67e5\u8be2\u8fdb\u884c\u64cd\u4f5c\u3002<\/p>\n
json -> json (\u4e0d\u9700\u8981\u7ffb\u8bd1)<\/h1>\n
\u5bf9\u6bd4MySQL\uff0cPostgreSQL\u5177\u6709JSON\u7c7b\u578b\uff0c\u53ef\u4ee5\u8f7b\u677e\u5730\u5bf9\u6570\u636e\u8fdb\u884c\u683c\u5f0f\u5316\u3002\u53ef\u4ee5\u5c06JSON\u8f6c\u6362\u4e3a\u5217\u7b49\uff0c\u5c06\u5176\u8f6c\u6362\u4e3a\u6613\u4e8e\u5904\u7406\u7684\u5f62\u5f0f\u3002
\n\u672c\u6b21\u4ec5\u7b80\u5355\u5730\u4eceJSON\u7c7b\u578b\u63d0\u53d6\u6570\u636e\u3002<\/p>\n
\/\/ \u66f8\u304d\u8fbc\u307f<\/span>\r\ninsertQuery<\/span> :=<\/span> \"INSERT into t jsonColumn (jsonData) values($1)\"<\/span>\r\nd<\/span>,<\/span> _<\/span> :=<\/span> json<\/span>.<\/span>Marshal<\/span>(<\/span>newData<\/span>)<\/span>\r\ndb<\/span>.<\/span>Exec<\/span>(<\/span>insertQuery<\/span>,<\/span> d<\/span>)<\/span>\r\n\r\n\/\/ \u8aad\u307f\u8fbc\u307f<\/span>\r\nselectQuery<\/span> :=<\/span> \"SELECT jsonColumn FROM t\"<\/span>\r\nrow<\/span>,<\/span> _<\/span> :=<\/span> db<\/span>.<\/span>QueryRow<\/span>(<\/span>selectQuery<\/span>)<\/span>\r\nvar<\/span> jsonRaw<\/span> null<\/span>.<\/span>String<\/span>\r\nrow<\/span>.<\/span>scan<\/span>(<\/span>row<\/span>,<\/span> &<\/span>jsonRaw<\/span>)<\/span>\r\n\r\nvar<\/span> resultStruct<\/span> <<\/span>\u9069\u5f53\u306a\u69cb\u9020\u4f53<\/span>><\/span>\r\n\r\njson<\/span>.<\/span>Unmarshal<\/span>([]<\/span>byte<\/span>(<\/span>jsonRaw<\/span>),<\/span> &<\/span>resultStruct<\/span>)<\/span>\r\n<\/code><\/pre>\n
\u53ea\u9700\u8981\u7b80\u5355\u5730\u5c06\u5176\u8f6c\u6362\u4e3a JSON \u5e76\u5d4c\u5165\u5373\u53ef\u3002
\n\u8ba9\u6211\u4eec\u4f7f\u7528 JSON \u5305\u3002<\/p>\n
\u56de\u5e94 PK<\/h1>\n
\u5982\u679c\u5728\u63d2\u5165\u65f6\u6709\u4e3b\u952e\uff0cPostgreSQL\u4f1a\u7acb\u5373\u8fd4\u56de\u5b83\u3002
\n\u5728Golang\u4e2d\uff0c\u5982\u4e0b\u6240\u793a\u3002<\/p>\n
var<\/span> targetId<\/span> int<\/span>\r\ninsertMasterQuery<\/span> :=<\/span> \"INSERT INTO t (id) VALUES (DEFAULT) RETURNING id;\"<\/span>\r\nerr<\/span> :=<\/span> database<\/span>.<\/span>QueryRow<\/span>(<\/span>insertMasterQuery<\/span>,<\/span> newsId<\/span>)<\/span>.<\/span>Scan<\/span>(<\/span>&<\/span>targetId<\/span>)<\/span>\r\n<\/code><\/pre>\n
\u6700\u540e<\/h1>\n
\u5728\u5b9e\u9645\u4f7f\u7528\u4e2d\uff0c\u53ef\u80fd\u9700\u8981\u5c06\u5176\u4e0eORM\u7b49\u7ec4\u5408\u4f7f\u7528\u3002Postgres\u5177\u6709\u591a\u529f\u80fd\u548c\u7075\u6d3b\u7684\u5904\u7406\u80fd\u529b\uff0c\u4f46\u8bb0\u5fc6\u7684\u5185\u5bb9\u4e5f\u5f88\u591a\u3002
\n\u4f46\u662f\uff0c\u53ea\u8981\u638c\u63e1\u57fa\u672c\u77e5\u8bc6\uff0c\u6211\u8ba4\u4e3a\u5c31\u4e0d\u4f1a\u9047\u5230\u592a\u591a\u56f0\u60d1\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u7531\u4e8e\u6709\u673a\u4f1a\u5728golang\u4e2d\u64cd\u4f5cpostgres\u800c\u6ca1\u6709\u4f7f\u7528ORM\uff0c\u6211\u5b66\u5230\u4e86\u5f88\u591a\u4e1c\u897f\uff0c\u6240\u4ee5\u60f3\u6574\u7406\u4e00\u4e0b\u5e76\u5206\u4eab\u3002 \u4f7f\u7528 […]<\/p>\n","protected":false},"author":4,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-44739","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"\n\u4f7f\u7528Go\u8bed\u8a00\u64cd\u4f5cPostgreSQL - Blog - Silicon Cloud<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/zh\/blog\/\u4f7f\u7528go\u8bed\u8a00\u64cd\u4f5cpostgresql\u3002\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u4f7f\u7528Go\u8bed\u8a00\u64cd\u4f5cPostgreSQL\" \/>\n<meta property=\"og:description\" content=\"\u7531\u4e8e\u6709\u673a\u4f1a\u5728golang\u4e2d\u64cd\u4f5cpostgres\u800c\u6ca1\u6709\u4f7f\u7528ORM\uff0c\u6211\u5b66\u5230\u4e86\u5f88\u591a\u4e1c\u897f\uff0c\u6240\u4ee5\u60f3\u6574\u7406\u4e00\u4e0b\u5e76\u5206\u4eab\u3002 \u4f7f\u7528 […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/\u4f7f\u7528go\u8bed\u8a00\u64cd\u4f5cpostgresql\u3002\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - 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