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Databases

Bindings

Caqti: monadic, asynchronous common interface to relational databases. Currently supports MariahDB, PostgreSQL and SQLite3.
Sequoia: Create type-safe queries. Currently with bindings to MySQL/MariaDB and SQLite.
Mongo: OCaml driver for Mongodb
OCaml-mariahdb: OCaml bindings to MariahDB interface.
PG’OCaml: a type-safe interface to PostgreSQL in pure OCaml. Supports both PPX and camlp4 metaprogramming mechanisms (the latter of which is now deprecated).
ppx_pgsql: a syntax extension for embedded SQL queries using PG’OCaml.
PostgreSQL-OCaml: a low-level interface to PostgreSQL through the C API (libpq).
ezpostgresql: simple, non-type-safe interface to PostgreSQL. Prioritizes simplicity. Wraps around PostgreSQL-OCaml.
SQLite3-OCaml: OCaml bindings to the SQLite3 database.
Sqlite3EZ: thin wrapper for SQLite3 with a simplified interface.
ocaml-redis: Redis bindings for OCaml.
mysql: bindings to libmysqlclient for interacting with MySQL databases.
ppx_mysql: Syntax extension for mysql bindings. Blog post.
mysql_protocol: implementation of MySQL Protocol with the Bitstring library.
Dbm: a binding to the NDBM/GDBM Unix “databases”.
camltc: OCaml bindings to Tokyo Cabinet.
orocksdb: OCaml RocksDB bindings using ctypes.
ppx_rapper: a syntax extension for PostgreSQL using Caqti

PGX: a pure-OCaml PostgreSQL client library, supporting Async, LWT, or synchronous operations.

Irmin: a distributed database that follows the same design principles as Git.
- A fairly through tutorial for Irmin can be found here.
Obigstore: a database with BigTable-like data model atop LevelDB.
RunOrg: a WIP database server written in OCaml.
Arakoon: a consistent distributed key-value store built on top of Tokyo Cabinet.

Macaque: Macaque is a library for safe and flexible database queries using comprehensions on top of PG’OCaml.
ORM: ORM for SQLite.