Applications and libraries/Database interfaces

Libraries

Current

Takusen

A library to interface to Oracle, Sqlite, and Postgres, with an API based on a left-fold enumerator. Now hosted at darcs.haskell.org. (Takusen in Hackage) (Last updated: 2008)

HDBC

HDBC is modeled loosely on Perl's DBI interface, though it has also been influenced by Python's DB-API v2, JDBC in Java, and HSQL in Haskell. Supports SQLite3, PostgreSQL, ODBC (including MySQL). (HDBC in Hackage) (Last updated: 2008)

Non-current

Move these to [#Current] if they are updated.

HSQL

HSQL is a simple library which provides an interface to multiple databases. MySQL, PostgreSQL, ODBC, SQLite and Oracle are currently supported. It is part of HToolkit.

HSQL's cabal package is not yet updated for GHC 6.8, but there are install instructions for GHC 6.8 . (HSQL in Hackage) (Package updated: 2007; Instructions updated: 2008)

HaskellDB

Daan Leijen's original HaskellDB, and an updated version that works with current Haskell implementations and is relatively platform-independent. HaskellDB is a combinator library for expressing queries and other operations on relational databases in a type safe and declarative way. All the queries and operations are completely expressed within Haskell, no embedded (SQL) commands are needed. This close integration makes it possible to do arbitrary computations on the database (like computing the transitive closure). (Last updated: 2007. Doesn't build with GHC 6.8)

Discontinued

CoddFish

PURe See a separate Haskell Wiki page on it. It is another type safe and declarative approach to database managament in Haskell. (Development discontinued in 2006)

VooDooM

PURe VooDooM reads VDM-SL specifications and applies transformation rules to the datatypes that are defined in them to obtain a relational representation for these datatypes. The relational representation can be exported as VDM-SL datatypes (inserted back into the original specification) or SQL table definitions (which can be fed to a relational DBMS). (Development discontinued in 2006)

HaSQL

HaSQL is a Haskell to ODBC interface. HaSQL allows Haskell program to run SQL queries against an ODBC compliant database. Queries with parameters are supported. Data is retrieved from the database as a lazy list. (Development dicontinued.)

MySQL-HS

MySQL-HS is an interface to the MySQL database.

Note: Development was discontinued on 2004-09-21.

In development

Berkeley DB/DBXML binding (email me)

Current status: small working subset

Hackage

• Database interfaces on Hackage

Related concepts

Relational algebra

This page contains a list of libraries and tools in a certain category. For a comprehensive list of such pages, see Applications and libraries.