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Version 0.1: (2012-05-04) * Renamed several modules, typeclasses, and functions: QueryParams (renderParams) -> ToRow (toRow) QueryResults (convertResults) -> FromRow (fromRow) Param (render) -> ToField (toField) Result (convert) -> FromField (fromField) * Added the `Database.PostgreSQL.Simple.Ok` module, a variation of `Either SomeException` that has an instance for `Alternative` and also uses a list of exceptions to track the ways it has failed. * Changed the return type of `fromField` and `fromRow` from `Either SomeException` to `Ok`. * Thanks to suggestions from Ozgun Ataman, the `FromRow` typeclass has been massively improved. The result is simpler definitions and better compositionality. Also, user-defined instances need not be to be concerned about forcing the converted results to WHNF. Here is an example comparing the old to the new: instance (Result a, Result b) => QueryResults (a,b) where convertResults [fa,fb] [va,vb] = do !a <- convert fa va !b <- convert fb vb return (a,b) convertResults fs vs = convertError fs vs 2 instance (FromField a, FromField b) => FromRow (a,b) where fromRow = (,) <$> field <*> field * Added `(:.)`, a pair that allows one to compose `FromRow` instances: instance (FromRow a, FromRow b) => FromRow (a :. b) where fromRow = (:.) <$> fromRow <*> fromRow * Moved the contents `Field` module into the `FromField` module. * Removed the `RawResult` type. * Added `DefaultIsolationLevel` as a distinct `IsolationLevel` option and `DefaultReadWriteMode` as a distinct `ReadWriteMode`.