postgresql-typed: A PostgreSQL library with compile-time SQL type inference and optional HDBC backend

[ bsd3, database, library ] [ Propose Tags ]

Automatically type-check SQL statements at compile time. Uses Template Haskell and the raw PostgreSQL protocol to describe SQL statements at compile time and provide appropriate type marshalling for both parameters and results. Allows not only syntax verification of your SQL but also full type safety between your SQL and Haskell. Supports many built-in PostgreSQL types already, including arrays and ranges, and can be easily extended in user code to support any other types.

Also includes an optional HDBC backend that, since it uses the raw PostgreSQL protocol, may be more efficient than the normal libpq backend in some cases (though provides no more type safety than HDBC-postgresql when used without templates).

Originally based on Chris Forno's templatepg library.

Versions [faq] 0.3.0, 0.3.1, 0.3.2, 0.3.3, 0.4.0, 0.4.1, 0.4.2,,, 0.4.3, 0.4.4, 0.4.5, 0.5.0, 0.5.1, 0.5.2,, 0.6,,,,
Dependencies aeson (>=0.7), array, attoparsec (>=0.12 && <0.14), base (>=4.8 && <5), binary, bytestring (>=0.10.2), containers, cryptonite (>=0.5), haskell-src-meta, HDBC (>=2.2), memory (>=0.5), network, old-locale, postgresql-binary (>=0.8 && <0.11), scientific (>=0.3), template-haskell, text (>=1), time, utf8-string, uuid (>=1.3) [details]
License BSD-3-Clause
Copyright 2010-2013 Chris Forno, 2014-2017 Dylan Simon
Author Dylan Simon
Maintainer Dylan Simon <>
Revised Revision 1 made by DylanSimon at 2017-03-22T17:01:45Z
Category Database
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Source repo head: git clone git://
Uploaded by DylanSimon at 2017-01-27T03:26:43Z
Distributions NixOS:, Stackage:
Downloads 11211 total (281 in the last 30 days)
Rating 1.25 (votes: 1) [estimated by Bayesian average]
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Status Hackage Matrix CI
Docs available [build log]
Last success reported on 2017-01-27 [all 1 reports]





Enable md5 password authentication method.


Use binary protocol encoding via postgresql-binary. This may put additional restrictions on supported PostgreSQL server versions.


Support Text string values via text (implied by binary).


Support the UUID type via uuid (implied by binary).


Support decoding numeric via scientific (implied by binary).


Support decoding json via aeson.


Provide an HDBC driver backend using the raw PostgreSQL protocol.


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


Note: This package has metadata revisions in the cabal description newer than included in the tarball. To unpack the package including the revisions, use 'cabal get'.

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