module Database.Persist.SqlBackend.Internal.IsolationLevel where

import Data.String (IsString(..))

-- | Please refer to the documentation for the database in question for a full
-- overview of the semantics of the varying isloation levels
data IsolationLevel = ReadUncommitted
                    | ReadCommitted
                    | RepeatableRead
                    | Serializable
                    deriving (Int -> IsolationLevel -> ShowS
[IsolationLevel] -> ShowS
IsolationLevel -> String
(Int -> IsolationLevel -> ShowS)
-> (IsolationLevel -> String)
-> ([IsolationLevel] -> ShowS)
-> Show IsolationLevel
forall a.
(Int -> a -> ShowS) -> (a -> String) -> ([a] -> ShowS) -> Show a
showList :: [IsolationLevel] -> ShowS
$cshowList :: [IsolationLevel] -> ShowS
show :: IsolationLevel -> String
$cshow :: IsolationLevel -> String
showsPrec :: Int -> IsolationLevel -> ShowS
$cshowsPrec :: Int -> IsolationLevel -> ShowS
Show, IsolationLevel -> IsolationLevel -> Bool
(IsolationLevel -> IsolationLevel -> Bool)
-> (IsolationLevel -> IsolationLevel -> Bool) -> Eq IsolationLevel
forall a. (a -> a -> Bool) -> (a -> a -> Bool) -> Eq a
/= :: IsolationLevel -> IsolationLevel -> Bool
$c/= :: IsolationLevel -> IsolationLevel -> Bool
== :: IsolationLevel -> IsolationLevel -> Bool
$c== :: IsolationLevel -> IsolationLevel -> Bool
Eq, Int -> IsolationLevel
IsolationLevel -> Int
IsolationLevel -> [IsolationLevel]
IsolationLevel -> IsolationLevel
IsolationLevel -> IsolationLevel -> [IsolationLevel]
IsolationLevel
-> IsolationLevel -> IsolationLevel -> [IsolationLevel]
(IsolationLevel -> IsolationLevel)
-> (IsolationLevel -> IsolationLevel)
-> (Int -> IsolationLevel)
-> (IsolationLevel -> Int)
-> (IsolationLevel -> [IsolationLevel])
-> (IsolationLevel -> IsolationLevel -> [IsolationLevel])
-> (IsolationLevel -> IsolationLevel -> [IsolationLevel])
-> (IsolationLevel
    -> IsolationLevel -> IsolationLevel -> [IsolationLevel])
-> Enum IsolationLevel
forall a.
(a -> a)
-> (a -> a)
-> (Int -> a)
-> (a -> Int)
-> (a -> [a])
-> (a -> a -> [a])
-> (a -> a -> [a])
-> (a -> a -> a -> [a])
-> Enum a
enumFromThenTo :: IsolationLevel
-> IsolationLevel -> IsolationLevel -> [IsolationLevel]
$cenumFromThenTo :: IsolationLevel
-> IsolationLevel -> IsolationLevel -> [IsolationLevel]
enumFromTo :: IsolationLevel -> IsolationLevel -> [IsolationLevel]
$cenumFromTo :: IsolationLevel -> IsolationLevel -> [IsolationLevel]
enumFromThen :: IsolationLevel -> IsolationLevel -> [IsolationLevel]
$cenumFromThen :: IsolationLevel -> IsolationLevel -> [IsolationLevel]
enumFrom :: IsolationLevel -> [IsolationLevel]
$cenumFrom :: IsolationLevel -> [IsolationLevel]
fromEnum :: IsolationLevel -> Int
$cfromEnum :: IsolationLevel -> Int
toEnum :: Int -> IsolationLevel
$ctoEnum :: Int -> IsolationLevel
pred :: IsolationLevel -> IsolationLevel
$cpred :: IsolationLevel -> IsolationLevel
succ :: IsolationLevel -> IsolationLevel
$csucc :: IsolationLevel -> IsolationLevel
Enum, Eq IsolationLevel
Eq IsolationLevel
-> (IsolationLevel -> IsolationLevel -> Ordering)
-> (IsolationLevel -> IsolationLevel -> Bool)
-> (IsolationLevel -> IsolationLevel -> Bool)
-> (IsolationLevel -> IsolationLevel -> Bool)
-> (IsolationLevel -> IsolationLevel -> Bool)
-> (IsolationLevel -> IsolationLevel -> IsolationLevel)
-> (IsolationLevel -> IsolationLevel -> IsolationLevel)
-> Ord IsolationLevel
IsolationLevel -> IsolationLevel -> Bool
IsolationLevel -> IsolationLevel -> Ordering
IsolationLevel -> IsolationLevel -> IsolationLevel
forall a.
Eq a
-> (a -> a -> Ordering)
-> (a -> a -> Bool)
-> (a -> a -> Bool)
-> (a -> a -> Bool)
-> (a -> a -> Bool)
-> (a -> a -> a)
-> (a -> a -> a)
-> Ord a
min :: IsolationLevel -> IsolationLevel -> IsolationLevel
$cmin :: IsolationLevel -> IsolationLevel -> IsolationLevel
max :: IsolationLevel -> IsolationLevel -> IsolationLevel
$cmax :: IsolationLevel -> IsolationLevel -> IsolationLevel
>= :: IsolationLevel -> IsolationLevel -> Bool
$c>= :: IsolationLevel -> IsolationLevel -> Bool
> :: IsolationLevel -> IsolationLevel -> Bool
$c> :: IsolationLevel -> IsolationLevel -> Bool
<= :: IsolationLevel -> IsolationLevel -> Bool
$c<= :: IsolationLevel -> IsolationLevel -> Bool
< :: IsolationLevel -> IsolationLevel -> Bool
$c< :: IsolationLevel -> IsolationLevel -> Bool
compare :: IsolationLevel -> IsolationLevel -> Ordering
$ccompare :: IsolationLevel -> IsolationLevel -> Ordering
$cp1Ord :: Eq IsolationLevel
Ord, IsolationLevel
IsolationLevel -> IsolationLevel -> Bounded IsolationLevel
forall a. a -> a -> Bounded a
maxBound :: IsolationLevel
$cmaxBound :: IsolationLevel
minBound :: IsolationLevel
$cminBound :: IsolationLevel
Bounded)

makeIsolationLevelStatement :: (Monoid s, IsString s) => IsolationLevel -> s
makeIsolationLevelStatement :: IsolationLevel -> s
makeIsolationLevelStatement IsolationLevel
l = s
"SET TRANSACTION ISOLATION LEVEL " s -> s -> s
forall a. Semigroup a => a -> a -> a
<> case IsolationLevel
l of
    IsolationLevel
ReadUncommitted -> s
"READ UNCOMMITTED"
    IsolationLevel
ReadCommitted -> s
"READ COMMITTED"
    IsolationLevel
RepeatableRead -> s
"REPEATABLE READ"
    IsolationLevel
Serializable -> s
"SERIALIZABLE"