Safe Haskell	None
Language	Haskell2010

Database.PostgreSQL.PQTypes.Transaction.Settings

Synopsis

Documentation

Predicate that determines whether the transaction has to be restarted.

Constructors

Instances

Show RestartPredicate Source #
Instance details Defined in Database.PostgreSQL.PQTypes.Transaction.Settings Methods showsPrec :: Int -> RestartPredicate -> ShowS # show :: RestartPredicate -> String # showList :: [RestartPredicate] -> ShowS #

Constructors

Fields

tsAutoTransaction :: !Bool
If set to True, transaction will be automatically started at the beginning of database action and after each commit / rollback. If set to False, no transaction will automatically start in either of above cases.
tsIsolationLevel :: !IsolationLevel
Isolation level of all transactions.
tsRestartPredicate :: !(Maybe RestartPredicate)
Defines behavior of withTransaction in case exceptions thrown within supplied monadic action are not caught and reach its body. If set to Nothing, exceptions will be propagated as usual. If set to Just f, exceptions will be intercepted and passed to f along with a number that indicates how many times the transaction block already failed. If f returns True, the transaction is restarted. Otherwise the exception is further propagated. This allows for restarting transactions e.g. in case of serialization failure. It is up to the caller to ensure that is it safe to execute supplied monadic action multiple times.
tsPermissions :: !Permissions
Permissions of all transactions.

Instances

Show TransactionSettings Source #
Instance details Defined in Database.PostgreSQL.PQTypes.Transaction.Settings Methods showsPrec :: Int -> TransactionSettings -> ShowS # show :: TransactionSettings -> String # showList :: [TransactionSettings] -> ShowS #
Default TransactionSettings Source #	Default transaction settings.
Instance details Defined in Database.PostgreSQL.PQTypes.Transaction.Settings Methods def :: TransactionSettings #

Constructors

Instances

Eq IsolationLevel Source #
Instance details Defined in Database.PostgreSQL.PQTypes.Transaction.Settings Methods (==) :: IsolationLevel -> IsolationLevel -> Bool # (/=) :: IsolationLevel -> IsolationLevel -> Bool #
Ord IsolationLevel Source #
Instance details Defined in Database.PostgreSQL.PQTypes.Transaction.Settings Methods compare :: IsolationLevel -> IsolationLevel -> Ordering # (<) :: IsolationLevel -> IsolationLevel -> Bool # (<=) :: IsolationLevel -> IsolationLevel -> Bool # (>) :: IsolationLevel -> IsolationLevel -> Bool # (>=) :: IsolationLevel -> IsolationLevel -> Bool # max :: IsolationLevel -> IsolationLevel -> IsolationLevel # min :: IsolationLevel -> IsolationLevel -> IsolationLevel #
Show IsolationLevel Source #
Instance details Defined in Database.PostgreSQL.PQTypes.Transaction.Settings Methods showsPrec :: Int -> IsolationLevel -> ShowS # show :: IsolationLevel -> String # showList :: [IsolationLevel] -> ShowS #

Constructors

Instances

Eq Permissions Source #
Instance details Defined in Database.PostgreSQL.PQTypes.Transaction.Settings Methods (==) :: Permissions -> Permissions -> Bool # (/=) :: Permissions -> Permissions -> Bool #
Ord Permissions Source #
Instance details Defined in Database.PostgreSQL.PQTypes.Transaction.Settings Methods compare :: Permissions -> Permissions -> Ordering # (<) :: Permissions -> Permissions -> Bool # (<=) :: Permissions -> Permissions -> Bool # (>) :: Permissions -> Permissions -> Bool # (>=) :: Permissions -> Permissions -> Bool # max :: Permissions -> Permissions -> Permissions # min :: Permissions -> Permissions -> Permissions #
Show Permissions Source #
Instance details Defined in Database.PostgreSQL.PQTypes.Transaction.Settings Methods showsPrec :: Int -> Permissions -> ShowS # show :: Permissions -> String # showList :: [Permissions] -> ShowS #

def :: Default a => a #

The default value for this type.