hasql-transaction

Composable abstraction over retryable transactions for Hasql

https://github.com/nikita-volkov/hasql-transaction

LTS Haskell 24.59:1.2.1
Stackage Nightly 2026-09-18:1.2.3.1
Latest on Hackage:1.2.3.1

See all snapshots hasql-transaction appears in

MIT licensed and maintained by Nikita Volkov
This version can be pinned in stack with:hasql-transaction-1.2.3.1@sha256:81f72813ec5ff1c20987c72541c4b0d7f5c5820f5a42d10ce37859b74e144f5a,2874

Module documentation for 1.2.3.1

Changes

v1.2.3.1

  • Update test dependencies

v1.2.3.0

Non-breaking

  • Add Semigroup/Monoid instances for Mode and IsolationLevel, combining via max with mempty as the weakest value, so composed transaction requirements escalate to the strictest one explicitly requested.

v1.2.2.1

  • Conform to the new hasql API (v2.0)

v1.2

  • Removed the unpreparedTransaction session because the same effects can now be achieved via the connection settings in Hasql

v1.1

  • Add automatic retry on deadlock errors (code 40P01)