{"id":207023,"date":"2025-07-08T08:14:59","date_gmt":"2025-07-08T00:14:59","guid":{"rendered":"https:\/\/server.hk\/cnblog\/207023\/"},"modified":"2025-07-08T08:14:59","modified_gmt":"2025-07-08T00:14:59","slug":"%e6%88%91%e5%ba%94%e8%af%a5%e5%9b%9e%e6%bb%9a%e5%8f%aa%e5%8c%85%e5%90%ab-copy-%e7%9a%84%e4%ba%8b%e5%8a%a1%e5%90%97%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/207023\/","title":{"rendered":"\u6211\u5e94\u8be5\u56de\u6eda\u53ea\u5305\u542b COPY \u7684\u4e8b\u52a1\u5417\uff1f"},"content":{"rendered":"

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

\u5f53\u524d\u4f4d\u7f6e\uff1a ><\/span> ><\/span> ><\/span> ><\/span> \u6211\u5e94\u8be5\u56de\u6eda\u53ea\u5305\u542b COPY \u7684\u4e8b\u52a1\u5417\uff1f<\/span><\/p>\n

\u6765\u6e90\uff1astackoverflow<\/span>
\n2024-04-19 15:51:34<\/span>
\n<\/i>0\u6d4f\u89c8<\/span>
\n<\/i>\u6536\u85cf<\/span> <\/p>\n

\u54c8\u55bd\uff01\u4eca\u5929\u5fc3\u8840\u6765\u6f6e\u7ed9\u5927\u5bb6\u5e26\u6765\u4e86\u300a\u6211\u5e94\u8be5\u56de\u6eda\u53ea\u5305\u542b COPY \u7684\u4e8b\u52a1\u5417\uff1f\u300b<\/span>\uff0c\u60f3\u5fc5\u5927\u5bb6\u5e94\u8be5\u5bf9Golang<\/span>\u90fd\u4e0d\u964c\u751f\u5427\uff0c\u90a3\u4e48\u9605\u8bfb\u672c\u6587\u5c31\u90fd\u4e0d\u4f1a\u5f88\u56f0\u96be\uff0c\u4ee5\u4e0b\u5185\u5bb9\u4e3b\u8981\u6d89\u53ca\u5230<\/span>\uff0c\u82e5\u662f\u4f60\u6b63\u5728\u5b66\u4e60Golang<\/span>\uff0c\u5343\u4e07\u522b\u9519\u8fc7\u8fd9\u7bc7\u6587\u7ae0~\u5e0c\u671b\u80fd\u5e2e\u52a9\u5230\u4f60\uff01<\/p>\n

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

\u6211\u5728 go \u540e\u7aef\u4f7f\u7528 postgres copy\u3002\u590d\u5236\u662f\u4e8b\u52a1\u5185\u552f\u4e00\u7684\u64cd\u4f5c\u3002\u5982\u679c\u5931\u8d25\u6211\u5e94\u8be5\u56de\u6eda\u5417\uff1f<\/p>\n

func (pc *Postgres) Copy(records [][]interface{}) error {\n    tx, err := pc.db.Begin()\n    if err != nil {\n        return errors.Wrap(err, \"can't open transaction\")\n    }\n    stmt, err := tx.Prepare(pq.CopyIn(pc.table, pc.columns...))\n    if err != nil {\n        return errors.Wrap(err, \"can't prepare stmt\")\n    }\n    for _, record := range records {\n        if _, err := stmt.Exec(record...); err != nil {\n            return errors.Wrap(err, \"error exec record\")\n        }\n\n    }\n\n    if _, err = stmt.Exec(); err != nil {\n        return errors.Wrap(err, \"error exec stmt\")\n    }\n    if err = stmt.Close(); err != nil {\n        return errors.Wrap(err, \"error close stmt\")\n    }\n    if err = tx.Commit(); err != nil {\n        return errors.Wrap(err, \"error commit transaction\")\n    }\n    return nil\n}<\/pre>\n
\u636e\u6211\u4e86\u89e3\uff0c\u5982\u679c \\copy<\/code> \u5931\u8d25\uff0c\u4e8b\u52a1\u5c06\u88ab\u4e2d\u6b62\uff08\u94fe\u63a5\uff09\u5e76\u56de\u6eda\u3002<\/p>\n
\u7136\u800c\uff0c\u5728\u5b98\u65b9 lib\/pq<\/code> \u793a\u4f8b\u4e2d\uff0c\u6211\u770b\u5230\u4ed6\u4eec\u603b\u662f\u4f7f\u7528\u56de\u6eda\uff08\u4f46\u4ed6\u4eec\u6709\u591a\u4e2a\u64cd\u4f5c\uff09\u3002<\/p>\n
\u6709\u4eba\u53ef\u4ee5\u6307\u5bfc\u6211\u4e86\u89e3\u8fd9\u4e9b\u7ec6\u5fae\u5dee\u522b\u5417\uff1f<\/p>\n
 <\/p>\n
\u89e3\u51b3\u65b9\u6848<\/h2>\n
 <\/p>\n
\u770b\u8d77\u6765\u9020\u6210\u6df7\u4e71\u7684\u90e8\u5206\u539f\u56e0\u662f \u4e0e \u4e0d\u540c\u3002<\/p>\n
\uff08\u5982 \u4e2d\u6240\u5f15\u7528\uff09\u662f \u4e2d\u7684\u4e00\u6761\u547d\u4ee4\uff0c\u7528\u4e8e\u201c\u6267\u884c\u524d\u7aef\uff08\u5ba2\u6237\u7aef\uff09\u590d\u5236\u201d\u3002\u7b80\u5355\u6765\u8bf4\uff0c\u60a8\u5728\u8ba1\u7b97\u673a\u4e0a\u8fd0\u884c psql<\/code> \uff08\u57fa\u4e8e\u7ec8\u7aef\u7684 postgresql \u524d\u7aef\uff09\uff0c\u5e76\u4e14\u53ef\u4ee5\u5728\u6570\u636e\u5e93\u548c\u672c\u5730\u5b58\u50a8\uff08\u6216\u4ece\u60a8\u7684\u8ba1\u7b97\u673a\u53ef\u8bbf\u95ee\uff09\u7684\u6587\u4ef6\u4e4b\u95f4\u8fdb\u884c \\copy<\/code> \u6570\u636e\u3002\u6b64\u547d\u4ee4\u662f psql<\/code> \u7684\u4e00\u90e8\u5206\uff0c\u4e0d\u80fd\u901a\u8fc7 lib\/pq<\/code> \u4f7f\u7528\u3002<\/p>\n
\u662f\u5728\u670d\u52a1\u5668\u4e0a\u8fd0\u884c\u7684postgres sql\u547d\u4ee4\uff1b\u60a8\u6b63\u5728\u590d\u5236\u7684\u6587\u4ef6\u201c\u5fc5\u987b\u53ef\u7531 postgresql \u7528\u6237\uff08\u670d\u52a1\u5668\u8fd0\u884c\u7684\u7528\u6237 id\uff09\u8bbf\u95ee\uff0c\u5e76\u4e14\u5fc5\u987b\u4ece\u670d\u52a1\u5668\u7684\u89d2\u5ea6\u6307\u5b9a\u540d\u79f0\u201d\u3002\u8fd9\u5c31\u662f\u60a8\u5728\u5e94\u7528\u7a0b\u5e8f\u4e2d\u8c03\u7528\u7684\u5185\u5bb9\uff08\u6765\u81ea \u201ccopyin \u4f7f\u7528 copy from \u5185\u90e8\u201d\u5b9e\u73b0 \u548c \uff09<\/p>\n
\u56e0\u6b64\uff0c\u6b63\u5982 @mh-cbon \u7684 \u6240\u8bf4\uff1a<\/p>\n
\u8003\u8651\uff1a<\/p>\n
tx, err := pc.db.Begin()\nif err != nil {\n    return errors.Wrap(err, \"can't open transaction\")\n}\nstmt, err := tx.Prepare(pq.CopyIn(pc.table, pc.columns...))\nif err != nil {\n    return errors.Wrap(err, \"can't prepare stmt\")\n}<\/pre>\n
\u5982\u679c prepare<\/code> \u5931\u8d25\uff0c\u5219\u8bf4\u660e\u60a8\u5df2\u7ecf\u521b\u5efa\u4e86\u4e00\u4e2a\u4e8b\u52a1\uff0c\u7136\u540e\u8fd4\u56de\u800c\u4e0d\u5173\u95ed\u5b83\uff1b\u8fd9\u4f7f\u5f97\u4e8b\u52a1\u5904\u4e8e\u6253\u5f00\u72b6\u6001\uff0c\u5373 \u3002\u6dfb\u52a0 defer tx.rollback()<\/code> \u53ef\u786e\u4fdd\u4e0d\u4f1a\u53d1\u751f\u8fd9\u79cd\u60c5\u51b5\u3002<\/p>\n
\u6587\u4e2d\u5173\u4e8e\u7684\u77e5\u8bc6\u4ecb\u7ecd\uff0c\u5e0c\u671b\u5bf9\u4f60\u7684\u5b66\u4e60\u6709\u6240\u5e2e\u52a9\uff01\u82e5\u662f\u53d7\u76ca\u532a\u6d45\uff0c\u90a3\u5c31\u52a8\u52a8\u9f20\u6807\u6536\u85cf\u8fd9\u7bc7\u300a\u6211\u5e94\u8be5\u56de\u6eda\u53ea\u5305\u542b COPY \u7684\u4e8b\u52a1\u5417\uff1f\u300b\u6587\u7ae0\u5427\uff0c\u4e5f\u53ef\u5173\u6ce8\u516c\u4f17\u53f7\u4e86\u89e3\u76f8\u5173\u6280\u672f\u6587\u7ae0\u3002<\/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-207023","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/207023","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=207023"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/207023\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=207023"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=207023"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=207023"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}