-- Hoogle documentation, generated by Haddock
-- See Hoogle, http://www.haskell.org/hoogle/


-- | PostgreSQL support for the drifter schema migration tool
--   
@package drifter-postgresql
@version 0.0.1

module Drifter.PostgreSQL
data PGMigration
data ChangeHistory
ChangeHistory :: ChangeId -> ChangeName -> Maybe Description -> UTCTime -> ChangeHistory
histId :: ChangeHistory -> ChangeId
histName :: ChangeHistory -> ChangeName
histDescription :: ChangeHistory -> Maybe Description
histTime :: ChangeHistory -> UTCTime

-- | Takes the list of all migrations, removes the ones that have already
--   run and runs them. Use this instead of <a>migrate</a>.
runMigrations :: Connection -> [Change PGMigration] -> IO (Either String ())

-- | Check the schema_migrations table for all the migrations that have
--   previously run.
getChangeHistory :: Connection -> IO [ChangeHistory]
instance Eq ChangeId
instance Ord ChangeId
instance Show ChangeId
instance FromField ChangeId
instance Show ChangeHistory
instance FromRow ChangeHistory
instance Ord ChangeHistory
instance Eq ChangeHistory
instance Drifter PGMigration