@@ -2,7 +2,6 @@
2{-# LANGUAGE FlexibleInstances, TypeSynonymInstances #-}
2{-# LANGUAGE FlexibleInstances, TypeSynonymInstances #-}
3{-# LANGUAGE PatternGuards, ScopedTypeVariables #-}
3{-# LANGUAGE PatternGuards, ScopedTypeVariables #-}
4{-# LANGUAGE RecordWildCards #-}
4{-# LANGUAGE RecordWildCards #-}
5−{-# LANGUAGE PolyKinds #-}
8Module: Database.PostgreSQL.Simple.FromField
7Module: Database.PostgreSQL.Simple.FromField
@@ -107,27 +106,26 @@ module Database.PostgreSQL.Simple.FromField
107 , PQ.Oid(..)
106 , PQ.Oid(..)
108 , PQ.Format(..)
107 , PQ.Format(..)
109 , pgArrayFieldParser
108 , pgArrayFieldParser
112 , optionalField
110 , optionalField
113 , fromJSONField
111 , fromJSONField
114− , fromFieldJSONByteString
117#include "MachDeps.h"
114#include "MachDeps.h"
119−import Control.Applicative ( Const(Const), (<|>), (<$>), pure, (*>), (<*) )
116+import Control.Applicative ( (<|>), (<$>), pure, (*>), (<*) )
120import Control.Concurrent.MVar (MVar, newMVar)
117import Control.Concurrent.MVar (MVar, newMVar)
121−import Control.Exception (Exception (toException, fromException))
118+import Control.Exception (Exception)
122import qualified Data.Aeson as JSON
119import qualified Data.Aeson as JSON
120+import qualified Data.Aeson.Internal as JSON
121+import qualified Data.Aeson.Parser as JSON (value')
123import Data.Attoparsec.ByteString.Char8 hiding (Result)
122import Data.Attoparsec.ByteString.Char8 hiding (Result)
124import Data.ByteString (ByteString)
123import Data.ByteString (ByteString)
125import qualified Data.ByteString.Char8 as B
124import qualified Data.ByteString.Char8 as B
126−import Data.Functor.Identity (Identity(Identity))
127import Data.Int (Int16, Int32, Int64)
125import Data.Int (Int16, Int32, Int64)
128import Data.IORef (IORef, newIORef)
126import Data.IORef (IORef, newIORef)
129import Data.Ratio (Ratio)
127import Data.Ratio (Ratio)
130−import Data.Time.Compat ( UTCTime, ZonedTime, LocalTime, Day, TimeOfDay, CalendarDiffTime )
128+import Data.Time ( UTCTime, ZonedTime, LocalTime, Day, TimeOfDay )
131import Data.Typeable (Typeable, typeOf)
129import Data.Typeable (Typeable, typeOf)
132import Data.Vector (Vector)
130import Data.Vector (Vector)
133import Data.Vector.Mutable (IOVector)
131import Data.Vector.Mutable (IOVector)
@@ -154,8 +152,6 @@ import qualified Data.UUID.Types as UUID
154import Data.Scientific (Scientific)
152import Data.Scientific (Scientific)
155import GHC.Real (infinity, notANumber)
153import GHC.Real (infinity, notANumber)
157−import qualified Data.Aeson.Types as JSON
159-- | Exception thrown if conversion from a SQL value to a Haskell
155-- | Exception thrown if conversion from a SQL value to a Haskell
160-- value fails.
156-- value fails.
161data ResultError = Incompatible { errSQLType :: String
157data ResultError = Incompatible { errSQLType :: String
@@ -182,9 +178,7 @@ data ResultError = Incompatible { errSQLType :: String
182 -- between metadata and actual data in a row).
178 -- between metadata and actual data in a row).
183 deriving (Eq, Show, Typeable)
179 deriving (Eq, Show, Typeable)
185−instance Exception ResultError where
181+instance Exception ResultError
186− toException = postgresqlExceptionToException
187− fromException = postgresqlExceptionFromException
189left :: Exception a => a -> Conversion b
183left :: Exception a => a -> Conversion b
190left = conversionError
184left = conversionError
@@ -273,12 +267,6 @@ instance FromField () where
273 | typeOid f /= TI.voidOid = returnError Incompatible f ""
267 | typeOid f /= TI.voidOid = returnError Incompatible f ""
274 | otherwise = pure ()
268 | otherwise = pure ()
276−instance (FromField a) => FromField (Const a b) where
277− fromField f bs = Const <$> fromField f bs
279−instance (FromField a) => FromField (Identity a) where
280− fromField f bs = Identity <$> fromField f bs
282-- | For dealing with null values. Compatible with any postgresql type
270-- | For dealing with null values. Compatible with any postgresql type
283-- compatible with type @a@. Note that the type is not checked if
271-- compatible with type @a@. Note that the type is not checked if
284-- the value is null, although it is inadvisable to rely on this
272-- the value is null, although it is inadvisable to rely on this
@@ -325,11 +313,11 @@ instance FromField Char where
327instance FromField Int16 where
315instance FromField Int16 where
328− fromField = attoFieldParser ok16 $ signed decimal
316+ fromField = atto ok16 $ signed decimal
330-- | int2, int4
318-- | int2, int4
331instance FromField Int32 where
319instance FromField Int32 where
332− fromField = attoFieldParser ok32 $ signed decimal
320+ fromField = atto ok32 $ signed decimal
334#if WORD_SIZE_IN_BITS < 64
322#if WORD_SIZE_IN_BITS < 64
335-- | int2, int4, and if compiled as 64-bit code, int8 as well.
323-- | int2, int4, and if compiled as 64-bit code, int8 as well.
@@ -339,36 +327,36 @@ instance FromField Int32 where
339-- This library was compiled as 64-bit code.
327-- This library was compiled as 64-bit code.
341instance FromField Int where
329instance FromField Int where
342− fromField = attoFieldParser okInt $ signed decimal
330+ fromField = atto okInt $ signed decimal
344-- | int2, int4, int8
332-- | int2, int4, int8
345instance FromField Int64 where
333instance FromField Int64 where
346− fromField = attoFieldParser ok64 $ signed decimal
334+ fromField = atto ok64 $ signed decimal
348-- | int2, int4, int8
336-- | int2, int4, int8
349instance FromField Integer where
337instance FromField Integer where
350− fromField = attoFieldParser ok64 $ signed decimal
338+ fromField = atto ok64 $ signed decimal
352-- | int2, float4 (Uses attoparsec's 'double' routine, for
340-- | int2, float4 (Uses attoparsec's 'double' routine, for
353-- better accuracy convert to 'Scientific' or 'Rational' first)
341-- better accuracy convert to 'Scientific' or 'Rational' first)
354instance FromField Float where
342instance FromField Float where
355− fromField = attoFieldParser ok (realToFrac <$> pg_double)
343+ fromField = atto ok (realToFrac <$> pg_double)
356 where ok = eq TI.float4Oid \/ eq TI.int2Oid
344 where ok = eq TI.float4Oid \/ eq TI.int2Oid
358-- | int2, int4, float4, float8 (Uses attoparsec's 'double' routine, for
346-- | int2, int4, float4, float8 (Uses attoparsec's 'double' routine, for
359-- better accuracy convert to 'Scientific' or 'Rational' first)
347-- better accuracy convert to 'Scientific' or 'Rational' first)
360instance FromField Double where
348instance FromField Double where
361− fromField = attoFieldParser ok pg_double
349+ fromField = atto ok pg_double
362 where ok = eq TI.float4Oid \/ eq TI.float8Oid \/ eq TI.int2Oid \/ eq TI.int4Oid
350 where ok = eq TI.float4Oid \/ eq TI.float8Oid \/ eq TI.int2Oid \/ eq TI.int4Oid
364-- | int2, int4, int8, float4, float8, numeric
352-- | int2, int4, int8, float4, float8, numeric
365instance FromField (Ratio Integer) where
353instance FromField (Ratio Integer) where
366− fromField = attoFieldParser ok pg_rational
354+ fromField = atto ok pg_rational
367 where ok = eq TI.float4Oid \/ eq TI.float8Oid \/ eq TI.int2Oid \/ eq TI.int4Oid \/ eq TI.int8Oid \/ eq TI.numericOid
355 where ok = eq TI.float4Oid \/ eq TI.float8Oid \/ eq TI.int2Oid \/ eq TI.int4Oid \/ eq TI.int8Oid \/ eq TI.numericOid
369-- | int2, int4, int8, float4, float8, numeric
357-- | int2, int4, int8, float4, float8, numeric
370instance FromField Scientific where
358instance FromField Scientific where
371− fromField = attoFieldParser ok rational
359+ fromField = atto ok rational
372 where ok = eq TI.float4Oid \/ eq TI.float8Oid \/ eq TI.int2Oid \/ eq TI.int4Oid \/ eq TI.int8Oid \/ eq TI.numericOid
360 where ok = eq TI.float4Oid \/ eq TI.float8Oid \/ eq TI.int2Oid \/ eq TI.int4Oid \/ eq TI.int8Oid \/ eq TI.numericOid
374unBinary :: Binary t -> t
362unBinary :: Binary t -> t
@@ -396,7 +384,7 @@ instance FromField SB.ByteString where
398instance FromField PQ.Oid where
386instance FromField PQ.Oid where
399− fromField f dat = PQ.Oid <$> attoFieldParser (== TI.oidOid) decimal f dat
387+ fromField f dat = PQ.Oid <$> atto (== TI.oidOid) decimal f dat
401-- | bytea, name, text, \"char\", bpchar, varchar, unknown
389-- | bytea, name, text, \"char\", bpchar, varchar, unknown
402instance FromField LB.ByteString where
390instance FromField LB.ByteString where
@@ -489,15 +477,6 @@ instance FromField LocalTimestamp where
489instance FromField Date where
477instance FromField Date where
490 fromField = ff TI.dateOid "Date" parseDate
478 fromField = ff TI.dateOid "Date" parseDate
492−-- | interval. Requires you to configure intervalstyle as @iso_8601@.
494−-- You can configure intervalstyle on every connection with a @SET@ command,
495−-- but for better performance you may want to configure it permanently in the
496−-- file found with @SHOW config_file;@ .
498−instance FromField CalendarDiffTime where
499− fromField = ff TI.intervalOid "CalendarDiffTime" parseCalendarDiffTime
501ff :: PQ.Oid -> String -> (B8.ByteString -> Either String a)
480ff :: PQ.Oid -> String -> (B8.ByteString -> Either String a)
502 -> Field -> Maybe B8.ByteString -> Conversion a
481 -> Field -> Maybe B8.ByteString -> Conversion a
503ff compatOid hsType parseBS f mstr =
482ff compatOid hsType parseBS f mstr =
@@ -576,13 +555,11 @@ instance FromField UUID where
576-- | json, jsonb
555-- | json, jsonb
577instance FromField JSON.Value where
556instance FromField JSON.Value where
578 fromField f mbs = parseBS =<< fromFieldJSONByteString f mbs
557 fromField f mbs = parseBS =<< fromFieldJSONByteString f mbs
579− where parseBS bs = case JSON.eitherDecodeStrict' bs of
558+ where parseBS bs = case parseOnly (JSON.value' <* endOfInput) bs of
580 Left err -> returnError ConversionFailed f err
559 Left err -> returnError ConversionFailed f err
581 Right val -> pure val
560 Right val -> pure val
583-- | Return the JSON ByteString directly
562-- | Return the JSON ByteString directly
586fromFieldJSONByteString :: Field -> Maybe ByteString -> Conversion ByteString
563fromFieldJSONByteString :: Field -> Maybe ByteString -> Conversion ByteString
587fromFieldJSONByteString f mbs =
564fromFieldJSONByteString f mbs =
588 if typeOid f /= TI.jsonOid && typeOid f /= TI.jsonbOid
565 if typeOid f /= TI.jsonOid && typeOid f /= TI.jsonbOid
@@ -684,22 +661,10 @@ returnError mkErr f msg = do
684 (show (typeOf (undefined :: a)))
661 (show (typeOf (undefined :: a)))
687−-- | Construct a field parser from an attoparsec parser. An 'Incompatible' error is thrown if the
688−-- PostgreSQL oid does not match the specified predicate.
691−-- instance FromField Int16 where
692−-- fromField = attoFieldParser ok16 (signed decimal)
696−attoFieldParser :: forall a. (Typeable a)
664+atto :: forall a. (Typeable a)
697− => (PQ.Oid -> Bool)
665+ => Compat -> Parser a -> Field -> Maybe ByteString
698− -- ^ Predicate for whether the postgresql type oid is compatible with this parser
666+ -> Conversion a
700− -- ^ An attoparsec parser.
702−attoFieldParser types p0 f dat = doFromField f types (go p0) dat
667+atto types p0 f dat = doFromField f types (go p0) dat
704 go :: Parser a -> ByteString -> Conversion a
669 go :: Parser a -> ByteString -> Conversion a