We are pleased to announce the release of version 4.0 of the [PL/Haskell extension](https://github.com/ed-o-saurus/PLHaskell/releases/4.0). This extension allows users to write PostgreSQL functions in the Haskell functional programming language. Instructions can be found [here](https://github.com/ed-o-saurus/PLHaskell/blob/main/README.md).
Version 4.0 adds the ability to work with arrays. This release adds the ability to pass composite values to queries. Note that there is a break of backwards comparability regarding composite types returned from queries. Users of Ubuntu and Fedora can install the extension directly from the rpm and apt [repositories](https://github.com/ed-o-saurus/PLHaskell/blob/main/README.md#package-repositories). If you have problems with the extension or a feature request, please submit a Github issue.
