Moduleopaleye-0.10.8.0Haskell2010

Opaleye.Internal.RunQueryExternal

3 types
8 values

Packageopaleye-0.10.8.0
Exports11
LanguageHaskell2010
LicenceBSD-3-Clause
SourceRunQuery.hs

valuecloseCursor :: Cursor fields -> IO ()

valuedeclareCursor

:: Default FromFields fields haskells
=> Connection
-> Select fields
-> IO (Cursor haskells)

valuedeclareCursorExplicit

:: FromFields fields haskells
-> Connection
-> Select fields
-> IO (Cursor haskells)

valuefoldForward

:: Cursor haskells
-> Int
-> a -> haskells -> IO a
-> a
-> IO (Either a a)

valuerunQuery

:: Default FromFields fields haskells
=> Connection
-> Select fields
-> IO [haskells]

valuerunQueryExplicit

:: FromFields fields haskells
-> Connection
-> Select fields
-> IO [haskells]

valuerunQueryFold

:: Default FromFields fields haskells
=> Connection
-> Select fields
-> b
-> b -> haskells -> IO b
-> IO b

valuerunQueryFoldExplicit

:: FromFields fields haskells
-> Connection
-> Select fields
-> b
-> b -> haskells -> IO b
-> IO b

Datatypes

3 declarations

datadata Cursor haskells

Cursor within a transaction.

datadata FromFields fields haskells

A FromFields specifies how to convert Postgres values (fields) into Haskell values (haskells). Most likely you will never need to create one of these or handle one directly. It will be provided for you by the Default FromFields instance.

"FromFields fields haskells" corresponds to postgresql-simple's "RowParser haskells". "Default FromFields fields haskells" corresponds to postgresql-simple's "FromRow haskells".

Instances11Profunctor, ProductProfunctor, SumProfunctor, Functor, Applicative, Default, …

Profunctor FromFieldsDefined in opaleye-0.10.8.0 · Opaleye.Internal.RunQuery
ProductProfunctor FromFieldsDefined in opaleye-0.10.8.0 · Opaleye.Internal.RunQuery
SumProfunctor FromFieldsDefined in opaleye-0.10.8.0 · Opaleye.Internal.RunQuery
DefaultFromField a b => Default FromFields (Field a) bDefined in opaleye-0.10.8.0 · Opaleye.Internal.RunQuery
DefaultFromField a b => Default FromFields (FieldNullable a) (Maybe b)Defined in opaleye-0.10.8.0 · Opaleye.Internal.RunQuery
Default FromFields fields haskells => Default FromFields (MaybeFields fields) (Maybe haskells)Defined in opaleye-0.10.8.0 · Opaleye.Internal.MaybeFields
Functor (FromFields c)Defined in opaleye-0.10.8.0 · Opaleye.Internal.RunQuery
Applicative (FromFields c)Defined in opaleye-0.10.8.0 · Opaleye.Internal.RunQuery
Default (Inferrable FromField) a b => Default (Inferrable FromFields) (Field a) bDefined in opaleye-0.10.8.0 · Opaleye.Internal.Inferrable
(Default (Inferrable FromField) a b, Maybe b ~ maybe_b) => Default (Inferrable FromFields) (FieldNullable a) maybe_bDefined in opaleye-0.10.8.0 · Opaleye.Internal.Inferrable
(Default (Inferrable FromFields) fields haskells, Maybe haskells ~ maybe_haskells) => Default (Inferrable FromFields) (MaybeFields fields) maybe_haskellsDefined in opaleye-0.10.8.0 · Opaleye.Internal.MaybeFields

newtypenewtype FromField sqlType haskellType

A FromField sqlType haskellType encodes how to turn a value of Postgres type sqlType into a value of Haskell type haskellType. For example a value of type FromField SqlText String encodes how to turn a SqlText result from the database into a Haskell String.

"FromField sqlType haskellType" corresponds to postgresql-simple's "FieldParser haskellType".

Instances19Functor, Default, …

DefaultFromField sqlType haskellType => Default FromField sqlType haskellTypeDefined in opaleye-0.10.8.0 · Opaleye.Internal.RunQuery
Functor (FromField u)Defined in opaleye-0.10.8.0 · Opaleye.Internal.RunQuery
bool ~ Bool => Default (Inferrable FromField) SqlBool boolDefined in opaleye-0.10.8.0 · Opaleye.Internal.Inferrable
bytestring ~ ByteString => Default (Inferrable FromField) SqlBytea bytestringDefined in opaleye-0.10.8.0 · Opaleye.Internal.Inferrable
calendardifftime ~ CalendarDiffTime => Default (Inferrable FromField) SqlInterval calendardifftimeDefined in opaleye-0.10.8.0 · Opaleye.Internal.Inferrable
cttext ~ CI Text => Default (Inferrable FromField) SqlCitext cttextDefined in opaleye-0.10.8.0 · Opaleye.Internal.Inferrable
day ~ Day => Default (Inferrable FromField) SqlDate dayDefined in opaleye-0.10.8.0 · Opaleye.Internal.Inferrable
double ~ Double => Default (Inferrable FromField) SqlFloat8 doubleDefined in opaleye-0.10.8.0 · Opaleye.Internal.Inferrable
int ~ Int => Default (Inferrable FromField) SqlInt4 intDefined in opaleye-0.10.8.0 · Opaleye.Internal.Inferrable
int16 ~ Int16 => Default (Inferrable FromField) SqlInt2 int16Defined in opaleye-0.10.8.0 · Opaleye.Internal.Inferrable
int64 ~ Int64 => Default (Inferrable FromField) SqlInt8 int64Defined in opaleye-0.10.8.0 · Opaleye.Internal.Inferrable
localtime ~ LocalTime => Default (Inferrable FromField) SqlTimestamp localtimeDefined in opaleye-0.10.8.0 · Opaleye.Internal.Inferrable
scientific ~ Scientific => Default (Inferrable FromField) SqlNumeric scientificDefined in opaleye-0.10.8.0 · Opaleye.Internal.Inferrable
text ~ Text => Default (Inferrable FromField) SqlText textDefined in opaleye-0.10.8.0 · Opaleye.Internal.Inferrable
timeofday ~ TimeOfDay => Default (Inferrable FromField) SqlTime timeofdayDefined in opaleye-0.10.8.0 · Opaleye.Internal.Inferrable
uuid ~ UUID => Default (Inferrable FromField) SqlUuid uuidDefined in opaleye-0.10.8.0 · Opaleye.Internal.Inferrable
varchar ~ Text => Default (Inferrable FromField) SqlVarcharN varcharDefined in opaleye-0.10.8.0 · Opaleye.Internal.Inferrable
(Typeable h, Default (Inferrable FromField) f h, hs ~ [h]) => Default (Inferrable FromField) (SqlArray f) hsDefined in opaleye-0.10.8.0 · Opaleye.Internal.Inferrable
(Typeable h, Default (Inferrable FromField) f h, hs ~ [Maybe h]) => Default (Inferrable FromField) (SqlArray_ 'Nullable f) hsDefined in opaleye-0.10.8.0 · Opaleye.Internal.Inferrable