{"id":207053,"date":"2025-07-08T09:00:30","date_gmt":"2025-07-08T01:00:30","guid":{"rendered":"https:\/\/server.hk\/cnblog\/207053\/"},"modified":"2025-07-08T09:00:30","modified_gmt":"2025-07-08T01:00:30","slug":"%e5%a6%82%e4%bd%95%e5%b0%86-jackc-pgx-%e4%b8%8e%e8%bf%9e%e6%8e%a5%e6%b1%a0%e3%80%81%e4%b8%8a%e4%b8%8b%e6%96%87%e3%80%81%e5%87%86%e5%a4%87%e5%a5%bd%e7%9a%84%e8%af%ad%e5%8f%a5%e7%ad%89%e4%b8%80%e8%b5%b7","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/207053\/","title":{"rendered":"\u5982\u4f55\u5c06 jackc\/pgx \u4e0e\u8fde\u63a5\u6c60\u3001\u4e0a\u4e0b\u6587\u3001\u51c6\u5907\u597d\u7684\u8bed\u53e5\u7b49\u4e00\u8d77\u4f7f\u7528"},"content":{"rendered":"

<\/b> <\/p>\n

\u5f53\u524d\u4f4d\u7f6e\uff1a ><\/span> ><\/span> ><\/span> ><\/span> \u5982\u4f55\u5c06 jackc\/pgx \u4e0e\u8fde\u63a5\u6c60\u3001\u4e0a\u4e0b\u6587\u3001\u51c6\u5907\u597d\u7684\u8bed\u53e5\u7b49\u4e00\u8d77\u4f7f\u7528<\/span><\/p>\n

\u6765\u6e90\uff1astackoverflow<\/span>
\n2024-04-19 18:15:36<\/span>
\n<\/i>0\u6d4f\u89c8<\/span>
\n<\/i>\u6536\u85cf<\/span> <\/p>\n

\u5728Golang\u5b9e\u6218\u5f00\u53d1\u7684\u8fc7\u7a0b\u4e2d\uff0c\u6211\u4eec\u7ecf\u5e38\u4f1a\u9047\u5230\u4e00\u4e9b\u8fd9\u6837\u90a3\u6837\u7684\u95ee\u9898\uff0c\u7136\u540e\u8981\u5361\u597d\u534a\u5929\uff0c\u7b49\u95ee\u9898\u89e3\u51b3\u4e86\u624d\u53d1\u73b0\u539f\u6765\u4e00\u4e9b\u7ec6\u8282\u77e5\u8bc6\u70b9\u8fd8\u662f\u6ca1\u6709\u638c\u63e1\u597d\u3002\u4eca\u5929\u5c31\u6574\u7406\u5206\u4eab\u300a\u5982\u4f55\u5c06 jackc\/pgx \u4e0e\u8fde\u63a5\u6c60\u3001\u4e0a\u4e0b\u6587\u3001\u51c6\u5907\u597d\u7684\u8bed\u53e5\u7b49\u4e00\u8d77\u4f7f\u7528\u300b\uff0c\u804a\u804a\uff0c\u5e0c\u671b\u53ef\u4ee5\u5e2e\u52a9\u5230\u6b63\u5728\u52aa\u529b\u8d5a\u94b1\u7684\u4f60\u3002<\/p>\n

\u95ee\u9898\u5185\u5bb9
\n <\/p>\n

\u6211\u4ecd\u7136\u4e0d\u662f golang \u4e13\u5bb6\uff0c\u4ecd\u5728\u5b66\u4e60\u4e2d\u3002\u8fd9\u4e5f\u662f\u6211\u7b2c\u4e00\u6b21\u63a5\u89e6postgresql<\/p>\n

import \"github.com\/jackc\/pgx\/v5\/pgxpool\"\n\nconst DB = \"postgres:\/\/postgres:xxx@localhost:5432\/mydb?pool_min_conns=1&pool_max_conns=5&pool_max_conn_idle_time=30s\"\n\ndbpool, err := pgxpool.New(context.Background(), DB)\nif err != nil {\n    log.Fatal(\"Unable to create connection pool: \"+err.Error())\n}\ndefer dbpool.Close()<\/pre>\n
1\u3002\u5982\u4f55\u4ece\u6c60\u4e2d\u83b7\u53d6\u8fde\u63a5\u5e76\u4f7f\u7528\u51c6\u5907\u597d\u7684\u8bed\u53e5\uff0c\u5c06 SQL \u548c SQL \u503c\u4f5c\u4e3a\u4e24\u4e2a\u5355\u72ec\u7684\u53c2\u6570\u4f20\u9012\uff1f<\/p>\n
\u6765\u81ea PHP\uff0c\u4e4b\u524d\u4ece\u672a\u4f7f\u7528\u8fc7\u6570\u636e\u5e93\u6c60\u3002<\/p>\n
2\u3002\u5982\u4f55\u786e\u4fdd\u4ece\u6c60\u4e2d\u62c9\u51fa\u8fde\u63a5\u65f6\u662f\u201c\u65b0\u9c9c\u201d\u7684\uff0c\u5e76\u4e14\u4e0d\u4f1a\u7ee7\u7eed\u4e4b\u524d\u672a\u5b8c\u6210\u7684\u4e8b\u52a1\uff08\u56de\u6eda\/\u63d0\u4ea4\uff09\uff1f<\/p>\n
3\u3002\u5f53\u60a8\u5c06\u8fde\u63a5\u91ca\u653e\u56de\u6c60\u65f6\u4e5f\u662f\u5982\u6b64\u3002\u5982\u679c\u4e0a\u4e0b\u6587\u53d6\u6d88\u6216\u8005\u8bf7\u6c42\u5931\u8d25\uff0c\u4f1a\u81ea\u52a8\u56de\u6eda\u5417\uff1f<\/p>\n
4\u3002\u8bf7\u6c42\u6570\u636e\u5e93\u65f6\u5982\u4f55\u4f7f\u7528goroutine\uff1f\u662f\u5426\u53ef\u4ee5\u5728\u540c\u4e00\u4e8b\u52a1\u4e2d\u8fdb\u884c\u5e76\u884c\u9009\u62e9\u67e5\u8be2\uff0c\u6216\u8005\u6240\u6709\u67e5\u8be2\u90fd\u5fc5\u987b\u662f\u4e32\u884c\u7684\uff1f\u6211\u60f3\u6240\u6709\u5199\u5165\u67e5\u8be2\u90fd\u5fc5\u987b\u662f\u4e32\u884c\u7684\uff1f<\/p>\n
 <\/p>\n
\u6b63\u786e\u7b54\u6848<\/h2>\n
 <\/p>\n
\u4e00\u822c\u60c5\u51b5\u4e0b\u4f60\u4e0d\u4f1a\u3002\u6c60\u8d1f\u8d23\u8fde\u63a5\u7684\u7ba1\u7406\uff08\u83b7\u53d6\u548c\u91ca\u653e\uff09\u4ee5\u53ca\u51c6\u5907\u8bed\u53e5\u7684\u7ba1\u7406\uff08\u521b\u5efa\u548c\u7f13\u5b58\uff09\u3002<\/p>\n
\u4f46\u662f\uff0c\u5982\u679c\u60a8\u60f3\u4fdd\u6301\u63a7\u5236\uff0c\u5219\u53ef\u4ee5\u4f7f\u7528 \u65b9\u6cd5\uff0c\u6216\u5176\u4efb\u4f55\u76f8\u5173\u65b9\u6cd5\u3002<\/p>\n
\u7c7b\u4f3c\u5730\uff0c\u5982\u679c\u60a8\u60f3\u624b\u52a8\u521b\u5efa\u5e76\u91cd\u7528\u51c6\u5907\u597d\u7684\u8bed\u53e5\uff08\u4f8b\u5982\uff0c\u60a8\u9700\u8981\u5728\u7d27\u5bc6\u5faa\u73af\u4e2d\u6267\u884c\u76f8\u540c\u7684\u67e5\u8be2\uff0c\u4f46\u60a8\u4e0d\u60f3\u4f9d\u8d56\u6c60\u5bf9\u51c6\u5907\u597d\u7684\u8bed\u53e5\u7684\u7f13\u5b58\uff09\uff0c\u90a3\u4e48\u60a8\u53ef\u4ee5\u4f7f\u7528\u83b7\u53d6\u7684\u8fde\u63a5\u7684 \u65b9\u6cd5\u8fd4\u56de\u8fde\u63a5\u7684 \u8868\u793a\uff0c\u4ee5\u53ca\u5b83\u6709\u4e00\u4e2a\u540d\u4e3a \u7684\u65b9\u6cd5\u3002<\/p>\n
\u6c60\u7684\u83b7\u53d6\u65b9\u6cd5\u8fd4\u56de\u53ef\u7528<\/em>\u8fde\u63a5\u3002\u6839\u636e\u5b9a\u4e49\uff0c\u6b63\u5728\u4f7f\u7528\u7684\u8fde\u63a5\uff08\u5373\u672a\u91ca\u653e\u7684\u8fde\u63a5\uff09\u4e0d\u53ef\u7528\uff0c\u5e76\u4e14\u4e0d\u4f1a\u7531 Acquire \u65b9\u6cd5\u8fd4\u56de\u3002<\/p>\n
\u91ca\u653e\u56de\u6c60\u7684\u8fde\u63a5\u6240\u6301\u6709\u7684\u8d44\u6e90\uff0c\u5982\u679c\u4e0d\u7a7a\u95f2\uff0c\u5c06\u88ab\u9500\u6bc1\u3002<\/em>\u3002\u5173\u4e8e\u4e8b\u52a1\u63d0\u4ea4\/\u56de\u6eda\uff0c\u5b83\u4eec\u90fd\u4e0d\u4f1a\u88ab\u81ea\u52a8\u8c03\u7528\uff0c \u660e\u786e\u6307\u51fa\uff1a\u201c\u5fc5\u987b\u5bf9\u8fd4\u56de\u7684\u4e8b\u52a1\u8c03\u7528\u63d0\u4ea4\u6216\u56de\u6eda\u624d\u80fd\u6700\u7ec8\u786e\u5b9a\u4e8b\u52a1\u5757\u3002\u201d<\/em><\/p>\n
\u8be5\u6c60\u53ef\u4ee5\u5b89\u5168\u5730\u5e76\u53d1\u4f7f\u7528\u3002\u4f46\u662f \u548c \u53ef\u4ee5\u5b89\u5168\u5730\u5e76\u53d1\u4f7f\u7528\u3002<\/p>\n
\u793a\u4f8b\uff1a<\/h4>\n
Begin<\/code> \u4e0d\u652f\u6301\u81ea\u52a8\u56de\u6eda\u6216\u81ea\u52a8\u63d0\u4ea4\uff0c\u60a8\u81ea\u5df1\u5fc5\u987b\uff0c\u5982 \uff0c\u8c03\u7528 Rollback<\/code> \u6216 Commit<\/code> \u6765\u201c\u6572\u5b9a\u4ea4\u6613\u533a\u5757\u201d\u3002<\/p>\n
func f(ctx context.Context, pool *pgxpool.Pool) (err error) {\n    tx, err := pool.Begin(ctx)\n    if err != nil {\n        return err\n    }\n    defer func() {\n        if err != nil {\n            tx.Rollback(ctx)\n        } else {\n            tx.Commit(ctx)\n        }\n    }()\n\n    _, err := tx.Exec(ctx, \"insert into users (email) values ($1)\", \"\")\n    if err != nil {\n        return err\n    }\n\n    var id int\n    row := tx.QueryRow(ctx, \"select id from users where email = $1\", \"\")\n    if err := row.Scan(&id); err != nil {\n        return err\n    }\n\n    \/\/ NOTE: the above is just an example, if you need the auto\n    \/\/ generated id of an inserted record, please use the RETURNING\n    \/\/ clause supported by PostgreSQL.\n    return nil\n}\n<\/pre>\n
\u4f46\u662f\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528 \u5982\u679c\u60a8\u5e0c\u671b pgx \u4e3a\u60a8\u5904\u7406 Rollback<\/code> \u6216 Commit<\/code> \u4e8b\u52a1\u3002<\/p>\n
func f(ctx context.Context, pool *pgxpool.Pool) (err error) {\n    return pool.BeginFunc(ctx, func(tx pgx.Tx) error {\n        _, err := tx.Exec(ctx, \"insert into users (email) values ($1)\", \"\")\n        if err != nil {\n            return err\n        }\n\n        var id int\n        row := tx.QueryRow(ctx, \"select id from users where email = $1\", \"\")\n        if err := row.Scan(&id); err != nil {\n            return err\n        }\n\n        \/\/ NOTE: the above is just an example, if you need the auto\n        \/\/ generated id of an inserted record, please use the RETURNING\n        \/\/ clause supported by PostgreSQL.\n        return nil\n    })\n}\n<\/pre>\n
\u672c\u7bc7\u5173\u4e8e\u300a\u5982\u4f55\u5c06 jackc\/pgx \u4e0e\u8fde\u63a5\u6c60\u3001\u4e0a\u4e0b\u6587\u3001\u51c6\u5907\u597d\u7684\u8bed\u53e5\u7b49\u4e00\u8d77\u4f7f\u7528\u300b\u7684\u4ecb\u7ecd\u5c31\u5230\u6b64\u7ed3\u675f\u5566\uff0c\u4f46\u662f\u5b66\u65e0\u6b62\u5883\uff0c\u60f3\u8981\u4e86\u89e3\u5b66\u4e60\u66f4\u591a\u5173\u4e8eGolang\u7684\u76f8\u5173\u77e5\u8bc6\uff0c\u8bf7\u5173\u6ce8\u516c\u4f17\u53f7\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
\u5f53\u524d\u4f4d\u7f6e\uff1a > > ...<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4925],"tags":[],"class_list":["post-207053","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/207053","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=207053"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/207053\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=207053"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=207053"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=207053"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}