esqueleto: Type-safe EDSL for SQL queries on persistent backends.

[ bsd3, database, library ] [ Propose Tags ]

esqueleto is a bare bones, type-safe EDSL for SQL queries that works with unmodified persistent SQL backends. Its language closely resembles SQL, so you don't have to learn new concepts, just new syntax, and it's fairly easy to predict the generated SQL and optimize it for your backend. Most kinds of errors committed when writing SQL are caught as compile-time errors---although it is possible to write type-checked esqueleto queries that fail at runtime.

persistent is a library for type-safe data serialization. It has many kinds of backends, such as SQL backends (persistent-mysql, persistent-postgresql, persistent-sqlite) and NoSQL backends (persistent-mongoDB). While persistent is a nice library for storing and retrieving records, including with filters, it does not try to support some of the features that are specific to SQL backends. In particular, esqueleto is the recommended library for type-safe JOINs on persistent SQL backends. (The alternative is using raw SQL, but that's error prone and does not offer any composability.)

Currently, SELECTs, UPDATEs, INSERTs and DELETEs are supported. Not all SQL features are available, but most of them can be easily added (especially functions), so please open an issue or send a pull request if you need anything that is not covered by esqueleto on https://github.com/prowdsponsor/esqueleto/.

The name of this library means "skeleton" in Portuguese and contains all three SQL letters in the correct order =). It was inspired by Scala's Squeryl but created from scratch.

Versions 0.1, 0.2, 0.2.1, 0.2.2, 0.2.3, 0.2.4, 0.2.5, 0.2.6, 0.2.7, 0.2.8, 0.2.9, 1.0, 1.0.1, 1.0.2, 1.0.3, 1.0.5, 1.0.6, 1.0.7, 1.0.8, 1.2, 1.2.1, 1.2.2, 1.2.2.1, 1.2.3, 1.2.4, 1.3, 1.3.1, 1.3.2, 1.3.3, 1.3.4, 1.3.4.2, 1.3.4.3, 1.3.4.4, 1.3.4.5, 1.3.4.6, 1.3.5, 1.3.6, 1.3.7, 1.3.8, 1.3.9, 1.3.10, 1.3.11, 1.3.12, 1.4, 1.4.1, 1.4.1.1, 1.4.1.2, 1.4.1.3, 1.4.2, 1.4.3, 1.4.4, 2.0.0, 2.0.1, 2.0.2, 2.0.3, 2.1.0, 2.1.1, 2.1.2, 2.1.2.1, 2.1.2.2, 2.1.2.3, 2.1.3, 2.2, 2.2.1, 2.2.2, 2.2.3, 2.2.4, 2.2.5, 2.2.6, 2.2.7, 2.2.8, 2.2.9, 2.2.10, 2.2.11, 2.2.12, 2.3.0, 2.4.0, 2.4.1, 2.4.2, 2.4.3, 2.5.0, 2.5.1, 2.5.2, 2.5.3 (info)
Dependencies base (>=4.5 && <4.9), conduit (>=1.1), monad-logger, persistent (>=2.1.1.7 && <2.3), resourcet (>=1.1), tagged (>=0.2), text (>=0.11 && <1.3), transformers (>=0.2), unordered-containers (>=0.2) [details]
License BSD-3-Clause
Copyright (c) 2012-2015 Felipe Almeida Lessa
Author Felipe Lessa
Maintainer felipe.lessa@gmail.com
Category Database
Home page https://github.com/prowdsponsor/esqueleto
Source repo head: git clone git://github.com/prowdsponsor/esqueleto.git
Uploaded by FelipeLessa at Wed Jul 15 17:20:49 UTC 2015
Distributions Arch:2.5.3.20180402, Debian:2.4.1, Fedora:2.5.20180715, FreeBSD:2.4.1, NixOS:2.5.3
Downloads 44864 total (269 in the last 30 days)
Rating 2.0 (votes: 1) [estimated by rule of succession]
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Status Docs available [build log]
Last success reported on 2015-07-15 [all 1 reports]
Hackage Matrix CI

Modules

[Index]

Flags

NameDescriptionDefaultType
postgresql

test postgresql. default is to test sqlite.

DisabledAutomatic
mysql

test MySQL/MariaDB. default is to test sqlite.

DisabledAutomatic

Use -f <flag> to enable a flag, or -f -<flag> to disable that flag. More info

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