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321 lines
16 KiB
321 lines
16 KiB
# SQL-first Golang ORM for PostgreSQL, MySQL, MSSQL, and SQLite
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[](https://github.com/uptrace/bun/actions)
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[](https://pkg.go.dev/github.com/uptrace/bun)
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[](https://bun.uptrace.dev/)
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[](https://discord.gg/rWtp5Aj)
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> Bun is brought to you by :star: [**uptrace/uptrace**](https://github.com/uptrace/uptrace). Uptrace
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> is an open source and blazingly fast
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> [distributed tracing tool](https://get.uptrace.dev/compare/distributed-tracing-tools.html) powered
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> by OpenTelemetry and ClickHouse. Give it a star as well!
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## Features
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- Works with [PostgreSQL](https://bun.uptrace.dev/guide/drivers.html#postgresql),
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[MySQL](https://bun.uptrace.dev/guide/drivers.html#mysql) (including MariaDB),
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[MSSQL](https://bun.uptrace.dev/guide/drivers.html#mssql),
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[SQLite](https://bun.uptrace.dev/guide/drivers.html#sqlite).
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- [ORM-like](/example/basic/) experience using good old SQL. Bun supports structs, map, scalars, and
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slices of map/structs/scalars.
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- [Bulk inserts](https://bun.uptrace.dev/guide/query-insert.html).
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- [Bulk updates](https://bun.uptrace.dev/guide/query-update.html) using common table expressions.
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- [Bulk deletes](https://bun.uptrace.dev/guide/query-delete.html).
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- [Fixtures](https://bun.uptrace.dev/guide/fixtures.html).
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- [Migrations](https://bun.uptrace.dev/guide/migrations.html).
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- [Soft deletes](https://bun.uptrace.dev/guide/soft-deletes.html).
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Resources:
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- [**Get started**](https://bun.uptrace.dev/guide/golang-orm.html)
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- [Examples](https://github.com/uptrace/bun/tree/master/example)
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- [Discussions](https://github.com/uptrace/bun/discussions)
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- [Chat](https://discord.gg/rWtp5Aj)
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- [Reference](https://pkg.go.dev/github.com/uptrace/bun)
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- [Starter kit](https://github.com/go-bun/bun-starter-kit)
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Projects using Bun:
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- [gotosocial](https://github.com/superseriousbusiness/gotosocial) - Golang fediverse server.
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- [alexedwards/scs](https://github.com/alexedwards/scs) - HTTP Session Management for Go.
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- [emerald-web3-gateway](https://github.com/oasisprotocol/emerald-web3-gateway) - Web3 Gateway for
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the Oasis Emerald paratime.
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- [lndhub.go](https://github.com/getAlby/lndhub.go) - accounting wrapper for the Lightning Network.
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- [RealWorld app](https://github.com/go-bun/bun-realworld-app)
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- And hundreds more.
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## Benchmark
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[https://github.com/davars/dbeval](https://github.com/davars/dbeval)
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<details>
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<summary>results</summary>
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```
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BenchmarkInsert
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BenchmarkInsert/*dbeval.Memory/Authors
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BenchmarkInsert/*dbeval.Memory/Authors-4 84450 12104 ns/op 2623 B/op 70 allocs/op
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BenchmarkInsert/*dbeval.Xorm/Authors
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BenchmarkInsert/*dbeval.Xorm/Authors-4 7291 153505 ns/op 9024 B/op 311 allocs/op
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BenchmarkInsert/*dbeval.UpperDB/Authors
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BenchmarkInsert/*dbeval.UpperDB/Authors-4 4608 223672 ns/op 24160 B/op 1100 allocs/op
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BenchmarkInsert/*dbeval.Bun/Authors
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BenchmarkInsert/*dbeval.Bun/Authors-4 6034 186439 ns/op 6818 B/op 80 allocs/op
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BenchmarkInsert/*dbeval.PQ/Authors
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BenchmarkInsert/*dbeval.PQ/Authors-4 1141 907494 ns/op 6487 B/op 193 allocs/op
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BenchmarkInsert/*dbeval.SQLX/Authors
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BenchmarkInsert/*dbeval.SQLX/Authors-4 1165 916987 ns/op 10089 B/op 271 allocs/op
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BenchmarkInsert/*dbeval.Ozzo/Authors
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BenchmarkInsert/*dbeval.Ozzo/Authors-4 1105 1058082 ns/op 27826 B/op 588 allocs/op
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BenchmarkInsert/*dbeval.PGXStdlib/Authors
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BenchmarkInsert/*dbeval.PGXStdlib/Authors-4 1228 900207 ns/op 6032 B/op 180 allocs/op
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BenchmarkInsert/*dbeval.Gorm/Authors
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BenchmarkInsert/*dbeval.Gorm/Authors-4 946 1184285 ns/op 35634 B/op 918 allocs/op
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BenchmarkInsert/*dbeval.PGX/Authors
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BenchmarkInsert/*dbeval.PGX/Authors-4 1116 923728 ns/op 3839 B/op 130 allocs/op
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BenchmarkInsert/*dbeval.DBR/Authors
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BenchmarkInsert/*dbeval.DBR/Authors-4 5800 183982 ns/op 8646 B/op 230 allocs/op
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BenchmarkInsert/*dbeval.GoPG/Authors
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BenchmarkInsert/*dbeval.GoPG/Authors-4 6110 173923 ns/op 2906 B/op 87 allocs/op
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BenchmarkInsert/*dbeval.DBR/Articles
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BenchmarkInsert/*dbeval.DBR/Articles-4 1706 684466 ns/op 133346 B/op 1614 allocs/op
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BenchmarkInsert/*dbeval.PQ/Articles
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BenchmarkInsert/*dbeval.PQ/Articles-4 884 1249791 ns/op 100403 B/op 1491 allocs/op
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BenchmarkInsert/*dbeval.PGX/Articles
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BenchmarkInsert/*dbeval.PGX/Articles-4 916 1288143 ns/op 83539 B/op 1392 allocs/op
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BenchmarkInsert/*dbeval.GoPG/Articles
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BenchmarkInsert/*dbeval.GoPG/Articles-4 1726 622639 ns/op 78638 B/op 1359 allocs/op
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BenchmarkInsert/*dbeval.SQLX/Articles
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BenchmarkInsert/*dbeval.SQLX/Articles-4 860 1262599 ns/op 92030 B/op 1574 allocs/op
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BenchmarkInsert/*dbeval.Gorm/Articles
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BenchmarkInsert/*dbeval.Gorm/Articles-4 782 1421550 ns/op 136534 B/op 2411 allocs/op
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BenchmarkInsert/*dbeval.PGXStdlib/Articles
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BenchmarkInsert/*dbeval.PGXStdlib/Articles-4 938 1230576 ns/op 86743 B/op 1441 allocs/op
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BenchmarkInsert/*dbeval.Bun/Articles
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BenchmarkInsert/*dbeval.Bun/Articles-4 1843 626681 ns/op 101610 B/op 1323 allocs/op
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BenchmarkInsert/*dbeval.Xorm/Articles
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BenchmarkInsert/*dbeval.Xorm/Articles-4 1677 650244 ns/op 126677 B/op 1752 allocs/op
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BenchmarkInsert/*dbeval.Memory/Articles
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BenchmarkInsert/*dbeval.Memory/Articles-4 1988 1223308 ns/op 77576 B/op 1310 allocs/op
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BenchmarkInsert/*dbeval.UpperDB/Articles
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BenchmarkInsert/*dbeval.UpperDB/Articles-4 1696 687130 ns/op 139680 B/op 2862 allocs/op
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BenchmarkInsert/*dbeval.Ozzo/Articles
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BenchmarkInsert/*dbeval.Ozzo/Articles-4 697 1496859 ns/op 114780 B/op 1950 allocs/op
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BenchmarkFindAuthorByID
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BenchmarkFindAuthorByID/*dbeval.UpperDB
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BenchmarkFindAuthorByID/*dbeval.UpperDB-4 10184 117527 ns/op 9953 B/op 441 allocs/op
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BenchmarkFindAuthorByID/*dbeval.Bun
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BenchmarkFindAuthorByID/*dbeval.Bun-4 20716 54261 ns/op 5096 B/op 15 allocs/op
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BenchmarkFindAuthorByID/*dbeval.Ozzo
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BenchmarkFindAuthorByID/*dbeval.Ozzo-4 11166 91043 ns/op 3088 B/op 64 allocs/op
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BenchmarkFindAuthorByID/*dbeval.PQ
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BenchmarkFindAuthorByID/*dbeval.PQ-4 13875 86171 ns/op 844 B/op 24 allocs/op
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BenchmarkFindAuthorByID/*dbeval.PGX
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BenchmarkFindAuthorByID/*dbeval.PGX-4 13846 79983 ns/op 719 B/op 15 allocs/op
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BenchmarkFindAuthorByID/*dbeval.Memory
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BenchmarkFindAuthorByID/*dbeval.Memory-4 14113720 82.33 ns/op 0 B/op 0 allocs/op
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BenchmarkFindAuthorByID/*dbeval.Xorm
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BenchmarkFindAuthorByID/*dbeval.Xorm-4 12027 98519 ns/op 3633 B/op 106 allocs/op
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BenchmarkFindAuthorByID/*dbeval.Gorm
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BenchmarkFindAuthorByID/*dbeval.Gorm-4 11521 102241 ns/op 6592 B/op 143 allocs/op
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BenchmarkFindAuthorByID/*dbeval.PGXStdlib
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BenchmarkFindAuthorByID/*dbeval.PGXStdlib-4 13933 82626 ns/op 1174 B/op 28 allocs/op
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BenchmarkFindAuthorByID/*dbeval.DBR
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BenchmarkFindAuthorByID/*dbeval.DBR-4 21920 51175 ns/op 1756 B/op 39 allocs/op
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BenchmarkFindAuthorByID/*dbeval.SQLX
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BenchmarkFindAuthorByID/*dbeval.SQLX-4 13603 80788 ns/op 1327 B/op 32 allocs/op
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BenchmarkFindAuthorByID/*dbeval.GoPG
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BenchmarkFindAuthorByID/*dbeval.GoPG-4 23174 50042 ns/op 869 B/op 17 allocs/op
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BenchmarkFindAuthorByName
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BenchmarkFindAuthorByName/*dbeval.SQLX
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BenchmarkFindAuthorByName/*dbeval.SQLX-4 1070 1065272 ns/op 126348 B/op 4018 allocs/op
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BenchmarkFindAuthorByName/*dbeval.Bun
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BenchmarkFindAuthorByName/*dbeval.Bun-4 877 1231377 ns/op 115803 B/op 5005 allocs/op
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BenchmarkFindAuthorByName/*dbeval.Xorm
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BenchmarkFindAuthorByName/*dbeval.Xorm-4 471 2345445 ns/op 455711 B/op 19080 allocs/op
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BenchmarkFindAuthorByName/*dbeval.DBR
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BenchmarkFindAuthorByName/*dbeval.DBR-4 954 1089977 ns/op 120070 B/op 6023 allocs/op
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BenchmarkFindAuthorByName/*dbeval.PQ
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BenchmarkFindAuthorByName/*dbeval.PQ-4 1333 784400 ns/op 87159 B/op 4006 allocs/op
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BenchmarkFindAuthorByName/*dbeval.GoPG
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BenchmarkFindAuthorByName/*dbeval.GoPG-4 1580 770966 ns/op 87525 B/op 3028 allocs/op
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BenchmarkFindAuthorByName/*dbeval.UpperDB
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BenchmarkFindAuthorByName/*dbeval.UpperDB-4 789 1314164 ns/op 190689 B/op 6428 allocs/op
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BenchmarkFindAuthorByName/*dbeval.Ozzo
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BenchmarkFindAuthorByName/*dbeval.Ozzo-4 948 1255282 ns/op 238764 B/op 6053 allocs/op
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BenchmarkFindAuthorByName/*dbeval.PGXStdlib
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BenchmarkFindAuthorByName/*dbeval.PGXStdlib-4 1279 920391 ns/op 126163 B/op 4014 allocs/op
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BenchmarkFindAuthorByName/*dbeval.PGX
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BenchmarkFindAuthorByName/*dbeval.PGX-4 1364 780970 ns/op 101967 B/op 2028 allocs/op
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BenchmarkFindAuthorByName/*dbeval.Gorm
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BenchmarkFindAuthorByName/*dbeval.Gorm-4 340 3445818 ns/op 1573637 B/op 27102 allocs/op
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BenchmarkFindAuthorByName/*dbeval.Memory
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BenchmarkFindAuthorByName/*dbeval.Memory-4 38081223 31.24 ns/op 0 B/op 0 allocs/op
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BenchmarkRecentArticles
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BenchmarkRecentArticles/*dbeval.PGXStdlib
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BenchmarkRecentArticles/*dbeval.PGXStdlib-4 358 3344119 ns/op 3425578 B/op 14177 allocs/op
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BenchmarkRecentArticles/*dbeval.GoPG
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BenchmarkRecentArticles/*dbeval.GoPG-4 364 3156372 ns/op 1794091 B/op 10032 allocs/op
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BenchmarkRecentArticles/*dbeval.Xorm
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BenchmarkRecentArticles/*dbeval.Xorm-4 157 7567835 ns/op 5018011 B/op 81425 allocs/op
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BenchmarkRecentArticles/*dbeval.Gorm
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BenchmarkRecentArticles/*dbeval.Gorm-4 139 7980084 ns/op 6776277 B/op 85418 allocs/op
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BenchmarkRecentArticles/*dbeval.SQLX
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BenchmarkRecentArticles/*dbeval.SQLX-4 338 3289802 ns/op 3425890 B/op 14181 allocs/op
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BenchmarkRecentArticles/*dbeval.Ozzo
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BenchmarkRecentArticles/*dbeval.Ozzo-4 320 3508322 ns/op 4025966 B/op 18207 allocs/op
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BenchmarkRecentArticles/*dbeval.DBR
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BenchmarkRecentArticles/*dbeval.DBR-4 237 5248644 ns/op 3331003 B/op 21370 allocs/op
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BenchmarkRecentArticles/*dbeval.Bun
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BenchmarkRecentArticles/*dbeval.Bun-4 280 4528582 ns/op 1864362 B/op 15965 allocs/op
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BenchmarkRecentArticles/*dbeval.UpperDB
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BenchmarkRecentArticles/*dbeval.UpperDB-4 297 3704663 ns/op 3607287 B/op 18542 allocs/op
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BenchmarkRecentArticles/*dbeval.PQ
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BenchmarkRecentArticles/*dbeval.PQ-4 308 3489229 ns/op 3277050 B/op 17359 allocs/op
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BenchmarkRecentArticles/*dbeval.Memory
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BenchmarkRecentArticles/*dbeval.Memory-4 29590380 42.27 ns/op 0 B/op 0 allocs/op
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BenchmarkRecentArticles/*dbeval.PGX
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BenchmarkRecentArticles/*dbeval.PGX-4 356 3345500 ns/op 3297316 B/op 6226 allocs/op
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```
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</details>
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[https://github.com/frederikhors/orm-benchmark](https://github.com/frederikhors/orm-benchmark)
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<details>
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<summary>results</summary>
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```
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4000 times - Insert
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raw_stmt: 0.38s 94280 ns/op 718 B/op 14 allocs/op
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raw: 0.39s 96719 ns/op 718 B/op 13 allocs/op
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beego_orm: 0.48s 118994 ns/op 2411 B/op 56 allocs/op
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bun: 0.57s 142285 ns/op 918 B/op 12 allocs/op
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pg: 0.58s 145496 ns/op 1235 B/op 12 allocs/op
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gorm: 0.70s 175294 ns/op 6665 B/op 88 allocs/op
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xorm: 0.76s 189533 ns/op 3032 B/op 94 allocs/op
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4000 times - MultiInsert 100 row
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raw: 4.59s 1147385 ns/op 135155 B/op 916 allocs/op
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raw_stmt: 4.59s 1148137 ns/op 131076 B/op 916 allocs/op
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beego_orm: 5.50s 1375637 ns/op 179962 B/op 2747 allocs/op
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bun: 6.18s 1544648 ns/op 4265 B/op 214 allocs/op
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pg: 7.01s 1753495 ns/op 5039 B/op 114 allocs/op
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gorm: 9.52s 2379219 ns/op 293956 B/op 3729 allocs/op
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xorm: 11.66s 2915478 ns/op 286140 B/op 7422 allocs/op
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4000 times - Update
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raw_stmt: 0.26s 65781 ns/op 773 B/op 14 allocs/op
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raw: 0.31s 77209 ns/op 757 B/op 13 allocs/op
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beego_orm: 0.43s 107064 ns/op 1802 B/op 47 allocs/op
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bun: 0.56s 139839 ns/op 589 B/op 4 allocs/op
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pg: 0.60s 149608 ns/op 896 B/op 11 allocs/op
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gorm: 0.74s 185970 ns/op 6604 B/op 81 allocs/op
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xorm: 0.81s 203240 ns/op 2994 B/op 119 allocs/op
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4000 times - Read
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raw: 0.33s 81671 ns/op 2081 B/op 49 allocs/op
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raw_stmt: 0.34s 85847 ns/op 2112 B/op 50 allocs/op
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beego_orm: 0.38s 94777 ns/op 2106 B/op 75 allocs/op
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pg: 0.42s 106148 ns/op 1526 B/op 22 allocs/op
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bun: 0.43s 106904 ns/op 1319 B/op 18 allocs/op
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gorm: 0.65s 162221 ns/op 5240 B/op 108 allocs/op
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xorm: 1.13s 281738 ns/op 8326 B/op 237 allocs/op
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4000 times - MultiRead limit 100
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raw: 1.52s 380351 ns/op 38356 B/op 1037 allocs/op
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raw_stmt: 1.54s 385541 ns/op 38388 B/op 1038 allocs/op
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pg: 1.86s 465468 ns/op 24045 B/op 631 allocs/op
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bun: 2.58s 645354 ns/op 30009 B/op 1122 allocs/op
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beego_orm: 2.93s 732028 ns/op 55280 B/op 3077 allocs/op
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gorm: 4.97s 1241831 ns/op 71628 B/op 3877 allocs/op
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xorm: doesn't work
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```
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</details>
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## Why another database client?
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So you can elegantly write complex queries:
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```go
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regionalSales := db.NewSelect().
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ColumnExpr("region").
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ColumnExpr("SUM(amount) AS total_sales").
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TableExpr("orders").
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GroupExpr("region")
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topRegions := db.NewSelect().
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ColumnExpr("region").
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TableExpr("regional_sales").
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Where("total_sales > (SELECT SUM(total_sales) / 10 FROM regional_sales)")
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var items []map[string]interface{}
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err := db.NewSelect().
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With("regional_sales", regionalSales).
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With("top_regions", topRegions).
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ColumnExpr("region").
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ColumnExpr("product").
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ColumnExpr("SUM(quantity) AS product_units").
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ColumnExpr("SUM(amount) AS product_sales").
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TableExpr("orders").
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Where("region IN (SELECT region FROM top_regions)").
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GroupExpr("region").
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GroupExpr("product").
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Scan(ctx, &items)
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```
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```sql
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WITH regional_sales AS (
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SELECT region, SUM(amount) AS total_sales
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FROM orders
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GROUP BY region
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), top_regions AS (
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SELECT region
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FROM regional_sales
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WHERE total_sales > (SELECT SUM(total_sales)/10 FROM regional_sales)
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)
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SELECT region,
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product,
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SUM(quantity) AS product_units,
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SUM(amount) AS product_sales
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FROM orders
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WHERE region IN (SELECT region FROM top_regions)
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GROUP BY region, product
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```
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And scan results into scalars, structs, maps, slices of structs/maps/scalars:
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```go
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users := make([]User, 0)
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if err := db.NewSelect().Model(&users).OrderExpr("id ASC").Scan(ctx); err != nil {
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panic(err)
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}
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user1 := new(User)
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if err := db.NewSelect().Model(user1).Where("id = ?", 1).Scan(ctx); err != nil {
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panic(err)
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}
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```
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See [**Getting started**](https://bun.uptrace.dev/guide/golang-orm.html) guide and check
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[examples](example).
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## See also
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- [Golang HTTP router](https://github.com/uptrace/bunrouter)
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- [Golang ClickHouse ORM](https://github.com/uptrace/go-clickhouse)
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- [Golang msgpack](https://github.com/vmihailenco/msgpack)
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## Contributors
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Thanks to all the people who already contributed!
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<a href="https://github.com/uptrace/bun/graphs/contributors">
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<img src="https://contributors-img.web.app/image?repo=uptrace/bun" />
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</a>
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