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GHC 10.0.0.20260917 · lts/ghc-10.0.x · 77a8662 · 2026-10-31

Modulepersistent-2.18.1.0Haskell2010

Database.Persist.SqlBackend.Internal.SqlPoolHooks

Synopsis

data SqlPoolHooks

Packagepersistent-2.18.1.0
Exports1
LanguageHaskell2010
LicenceMIT
SourceSqlPoolHooks.hs

datadata SqlPoolHooks (m :: Type -> Type) backend

A set of hooks that may be used to alter the behaviour of runSqlPoolWithExtensibleHooks in a backwards-compatible fashion.

Constructors

SqlPoolHooks
- alterBackend :: backend -> m backend
  Alter the backend prior to executing any actions with it.
- runBefore :: backend -> Maybe IsolationLevel -> m ()
  Run this action immediately before the action is performed.
- runAfter :: backend -> Maybe IsolationLevel -> m ()
  Run this action immediately after the action is completed.
- runOnException :: backend -> Maybe IsolationLevel -> SomeException -> m ()
  This action is performed when an exception is received. The exception is provided as a convenience - it is rethrown once this cleanup function is complete.