module Database.PostgreSQL.PQTypes.Internal.Query
( runQueryIO
, QueryName(..)
, runPreparedQueryIO
) where
import Control.Concurrent.Async
import Control.Monad
import Data.IORef
import Data.String
import Foreign.ForeignPtr
import Foreign.Ptr
import qualified Control.Exception as E
import qualified Data.ByteString.Char8 as BS
import qualified Data.Text as T
import qualified Data.Text.Encoding as T
import qualified Data.Set as S
import Database.PostgreSQL.PQTypes.Internal.C.Interface
import Database.PostgreSQL.PQTypes.Internal.C.Types
import Database.PostgreSQL.PQTypes.Internal.Connection
import Database.PostgreSQL.PQTypes.Internal.Error
import Database.PostgreSQL.PQTypes.Internal.Error.Code
import Database.PostgreSQL.PQTypes.Internal.Exception
import Database.PostgreSQL.PQTypes.Internal.QueryResult
import Database.PostgreSQL.PQTypes.Internal.State
import Database.PostgreSQL.PQTypes.Internal.Utils
import Database.PostgreSQL.PQTypes.SQL.Class
import Database.PostgreSQL.PQTypes.ToSQL
runQueryIO
:: IsSQL sql
=> sql
-> DBState m
-> IO (Int, DBState m)
runQueryIO :: forall sql (m :: * -> *).
IsSQL sql =>
sql -> DBState m -> IO (Int, DBState m)
runQueryIO sql
sql = forall sql (m :: * -> *).
IsSQL sql =>
String
-> sql
-> (ConnectionData -> IO (Int, ForeignPtr PGresult))
-> DBState m
-> IO (Int, DBState m)
runQueryImpl String
"runQueryIO" sql
sql forall a b. (a -> b) -> a -> b
$ \ConnectionData{Ptr PGconn
IORef (Set Text)
ConnectionStats
cdPreparedQueries :: ConnectionData -> IORef (Set Text)
cdStats :: ConnectionData -> ConnectionStats
cdPtr :: ConnectionData -> Ptr PGconn
cdPreparedQueries :: IORef (Set Text)
cdStats :: ConnectionStats
cdPtr :: Ptr PGconn
..} -> do
let allocParam :: ParamAllocator
allocParam = (forall r. (Ptr PGparam -> IO r) -> IO r) -> ParamAllocator
ParamAllocator forall a b. (a -> b) -> a -> b
$ forall r. Ptr PGconn -> (Ptr PGparam -> IO r) -> IO r
withPGparam Ptr PGconn
cdPtr
forall sql r.
IsSQL sql =>
sql -> ParamAllocator -> (Ptr PGparam -> CString -> IO r) -> IO r
withSQL sql
sql ParamAllocator
allocParam forall a b. (a -> b) -> a -> b
$ \Ptr PGparam
param CString
query -> (,)
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> (forall a b. (Integral a, Num b) => a -> b
fromIntegral forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> Ptr PGparam -> IO CInt
c_PQparamCount Ptr PGparam
param)
forall (f :: * -> *) a b. Applicative f => f (a -> b) -> f a -> f b
<*> Ptr PGconn
-> Ptr PGerror
-> Ptr PGparam
-> CString
-> ResultFormat
-> IO (ForeignPtr PGresult)
c_PQparamExec Ptr PGconn
cdPtr forall a. Ptr a
nullPtr Ptr PGparam
param CString
query ResultFormat
c_RESULT_BINARY
newtype QueryName = QueryName T.Text
deriving (QueryName -> QueryName -> Bool
forall a. (a -> a -> Bool) -> (a -> a -> Bool) -> Eq a
/= :: QueryName -> QueryName -> Bool
$c/= :: QueryName -> QueryName -> Bool
== :: QueryName -> QueryName -> Bool
$c== :: QueryName -> QueryName -> Bool
Eq, Eq QueryName
QueryName -> QueryName -> Bool
QueryName -> QueryName -> Ordering
QueryName -> QueryName -> QueryName
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 :: QueryName -> QueryName -> QueryName
$cmin :: QueryName -> QueryName -> QueryName
max :: QueryName -> QueryName -> QueryName
$cmax :: QueryName -> QueryName -> QueryName
>= :: QueryName -> QueryName -> Bool
$c>= :: QueryName -> QueryName -> Bool
> :: QueryName -> QueryName -> Bool
$c> :: QueryName -> QueryName -> Bool
<= :: QueryName -> QueryName -> Bool
$c<= :: QueryName -> QueryName -> Bool
< :: QueryName -> QueryName -> Bool
$c< :: QueryName -> QueryName -> Bool
compare :: QueryName -> QueryName -> Ordering
$ccompare :: QueryName -> QueryName -> Ordering
Ord, Int -> QueryName -> ShowS
[QueryName] -> ShowS
QueryName -> String
forall a.
(Int -> a -> ShowS) -> (a -> String) -> ([a] -> ShowS) -> Show a
showList :: [QueryName] -> ShowS
$cshowList :: [QueryName] -> ShowS
show :: QueryName -> String
$cshow :: QueryName -> String
showsPrec :: Int -> QueryName -> ShowS
$cshowsPrec :: Int -> QueryName -> ShowS
Show, String -> QueryName
forall a. (String -> a) -> IsString a
fromString :: String -> QueryName
$cfromString :: String -> QueryName
IsString)
runPreparedQueryIO
:: IsSQL sql
=> QueryName
-> sql
-> DBState m
-> IO (Int, DBState m)
runPreparedQueryIO :: forall sql (m :: * -> *).
IsSQL sql =>
QueryName -> sql -> DBState m -> IO (Int, DBState m)
runPreparedQueryIO (QueryName Text
queryName) sql
sql = do
forall sql (m :: * -> *).
IsSQL sql =>
String
-> sql
-> (ConnectionData -> IO (Int, ForeignPtr PGresult))
-> DBState m
-> IO (Int, DBState m)
runQueryImpl String
"runPreparedQueryIO" sql
sql forall a b. (a -> b) -> a -> b
$ \ConnectionData{Ptr PGconn
IORef (Set Text)
ConnectionStats
cdPreparedQueries :: IORef (Set Text)
cdStats :: ConnectionStats
cdPtr :: Ptr PGconn
cdPreparedQueries :: ConnectionData -> IORef (Set Text)
cdStats :: ConnectionData -> ConnectionStats
cdPtr :: ConnectionData -> Ptr PGconn
..} -> do
forall (f :: * -> *). Applicative f => Bool -> f () -> f ()
when (Text -> Bool
T.null Text
queryName) forall a b. (a -> b) -> a -> b
$ do
forall e a. Exception e => e -> IO a
E.throwIO DBException
{ dbeQueryContext :: sql
dbeQueryContext = sql
sql
, dbeError :: HPQTypesError
dbeError = String -> HPQTypesError
HPQTypesError String
"runPreparedQueryIO: unnamed prepared query is not supported"
}
let allocParam :: ParamAllocator
allocParam = (forall r. (Ptr PGparam -> IO r) -> IO r) -> ParamAllocator
ParamAllocator forall a b. (a -> b) -> a -> b
$ forall r. Ptr PGconn -> (Ptr PGparam -> IO r) -> IO r
withPGparam Ptr PGconn
cdPtr
forall sql r.
IsSQL sql =>
sql -> ParamAllocator -> (Ptr PGparam -> CString -> IO r) -> IO r
withSQL sql
sql ParamAllocator
allocParam forall a b. (a -> b) -> a -> b
$ \Ptr PGparam
param CString
query -> do
Set Text
preparedQueries <- forall a. IORef a -> IO a
readIORef IORef (Set Text)
cdPreparedQueries
forall a. ByteString -> (CString -> IO a) -> IO a
BS.useAsCString (Text -> ByteString
T.encodeUtf8 Text
queryName) forall a b. (a -> b) -> a -> b
$ \CString
cname -> do
forall (f :: * -> *). Applicative f => Bool -> f () -> f ()
when (Text
queryName forall a. Ord a => a -> Set a -> Bool
`S.notMember` Set Text
preparedQueries) forall b c a. (b -> c) -> (a -> b) -> a -> c
. forall a. IO a -> IO a
E.mask_ forall a b. (a -> b) -> a -> b
$ do
ForeignPtr PGresult
res <- Ptr PGconn
-> Ptr PGerror
-> Ptr PGparam
-> CString
-> CString
-> IO (ForeignPtr PGresult)
c_PQparamPrepare Ptr PGconn
cdPtr forall a. Ptr a
nullPtr Ptr PGparam
param CString
cname CString
query
forall (f :: * -> *) a. Functor f => f a -> f ()
void forall b c a. (b -> c) -> (a -> b) -> a -> c
. forall a b. ForeignPtr a -> (Ptr a -> IO b) -> IO b
withForeignPtr ForeignPtr PGresult
res forall a b. (a -> b) -> a -> b
$ forall sql.
IsSQL sql =>
sql -> Ptr PGconn -> Ptr PGresult -> IO (Either Int Int)
verifyResult sql
sql Ptr PGconn
cdPtr
forall a. IORef a -> (a -> a) -> IO ()
modifyIORef' IORef (Set Text)
cdPreparedQueries forall a b. (a -> b) -> a -> b
$ forall a. Ord a => a -> Set a -> Set a
S.insert Text
queryName
(,) forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> (forall a b. (Integral a, Num b) => a -> b
fromIntegral forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> Ptr PGparam -> IO CInt
c_PQparamCount Ptr PGparam
param)
forall (f :: * -> *) a b. Applicative f => f (a -> b) -> f a -> f b
<*> Ptr PGconn
-> Ptr PGerror
-> Ptr PGparam
-> CString
-> ResultFormat
-> IO (ForeignPtr PGresult)
c_PQparamExecPrepared Ptr PGconn
cdPtr forall a. Ptr a
nullPtr Ptr PGparam
param CString
cname ResultFormat
c_RESULT_BINARY
runQueryImpl
:: IsSQL sql
=> String
-> sql
-> (ConnectionData -> IO (Int, ForeignPtr PGresult))
-> DBState m
-> IO (Int, DBState m)
runQueryImpl :: forall sql (m :: * -> *).
IsSQL sql =>
String
-> sql
-> (ConnectionData -> IO (Int, ForeignPtr PGresult))
-> DBState m
-> IO (Int, DBState m)
runQueryImpl String
fname sql
sql ConnectionData -> IO (Int, ForeignPtr PGresult)
execSql DBState m
st = do
(Int
affected, ForeignPtr PGresult
res) <- (ConnectionData -> IO (ConnectionData, (Int, ForeignPtr PGresult)))
-> IO (Int, ForeignPtr PGresult)
withConnDo forall a b. (a -> b) -> a -> b
$ \cd :: ConnectionData
cd@ConnectionData{Ptr PGconn
IORef (Set Text)
ConnectionStats
cdPreparedQueries :: IORef (Set Text)
cdStats :: ConnectionStats
cdPtr :: Ptr PGconn
cdPreparedQueries :: ConnectionData -> IORef (Set Text)
cdStats :: ConnectionData -> ConnectionStats
cdPtr :: ConnectionData -> Ptr PGconn
..} -> forall b. ((forall a. IO a -> IO a) -> IO b) -> IO b
E.mask forall a b. (a -> b) -> a -> b
$ \forall a. IO a -> IO a
restore -> do
Async (ConnectionData, (Int, ForeignPtr PGresult))
queryRunner <- forall a. IO a -> IO (Async a)
async forall b c a. (b -> c) -> (a -> b) -> a -> c
. forall a. IO a -> IO a
restore forall a b. (a -> b) -> a -> b
$ do
(Int
paramCount, ForeignPtr PGresult
res) <- ConnectionData -> IO (Int, ForeignPtr PGresult)
execSql ConnectionData
cd
Either Int Int
affected <- forall a b. ForeignPtr a -> (Ptr a -> IO b) -> IO b
withForeignPtr ForeignPtr PGresult
res forall a b. (a -> b) -> a -> b
$ forall sql.
IsSQL sql =>
sql -> Ptr PGconn -> Ptr PGresult -> IO (Either Int Int)
verifyResult sql
sql Ptr PGconn
cdPtr
ConnectionStats
stats' <- case Either Int Int
affected of
Left Int
_ -> forall (m :: * -> *) a. Monad m => a -> m a
return ConnectionStats
cdStats {
statsQueries :: Int
statsQueries = ConnectionStats -> Int
statsQueries ConnectionStats
cdStats forall a. Num a => a -> a -> a
+ Int
1
, statsParams :: Int
statsParams = ConnectionStats -> Int
statsParams ConnectionStats
cdStats forall a. Num a => a -> a -> a
+ Int
paramCount
}
Right Int
rows -> do
Int
columns <- forall a b. (Integral a, Num b) => a -> b
fromIntegral forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> forall a b. ForeignPtr a -> (Ptr a -> IO b) -> IO b
withForeignPtr ForeignPtr PGresult
res Ptr PGresult -> IO CInt
c_PQnfields
forall (m :: * -> *) a. Monad m => a -> m a
return ConnectionStats {
statsQueries :: Int
statsQueries = ConnectionStats -> Int
statsQueries ConnectionStats
cdStats forall a. Num a => a -> a -> a
+ Int
1
, statsRows :: Int
statsRows = ConnectionStats -> Int
statsRows ConnectionStats
cdStats forall a. Num a => a -> a -> a
+ Int
rows
, statsValues :: Int
statsValues = ConnectionStats -> Int
statsValues ConnectionStats
cdStats forall a. Num a => a -> a -> a
+ (Int
rows forall a. Num a => a -> a -> a
* Int
columns)
, statsParams :: Int
statsParams = ConnectionStats -> Int
statsParams ConnectionStats
cdStats forall a. Num a => a -> a -> a
+ Int
paramCount
}
ConnectionStats
stats' seq :: forall a b. a -> b -> b
`seq` forall (m :: * -> *) a. Monad m => a -> m a
return (ConnectionData
cd { cdStats :: ConnectionStats
cdStats = ConnectionStats
stats' }, (forall a c b. (a -> c) -> (b -> c) -> Either a b -> c
either forall a. a -> a
id forall a. a -> a
id Either Int Int
affected, ForeignPtr PGresult
res))
forall a b. IO a -> IO b -> IO a
E.onException (forall a. IO a -> IO a
restore forall a b. (a -> b) -> a -> b
$ forall a. Async a -> IO a
wait Async (ConnectionData, (Int, ForeignPtr PGresult))
queryRunner) forall b c a. (b -> c) -> (a -> b) -> a -> c
. forall a. IO a -> IO a
E.uninterruptibleMask_ forall a b. (a -> b) -> a -> b
$ do
Ptr PGconn -> IO (Maybe String)
c_PQcancel Ptr PGconn
cdPtr forall (m :: * -> *) a b. Monad m => m a -> (a -> m b) -> m b
>>= \case
Maybe String
Nothing -> forall a. Async a -> IO ()
cancel Async (ConnectionData, (Int, ForeignPtr PGresult))
queryRunner
Just String
_ -> forall a. Async a -> IO (Maybe (Either SomeException a))
poll Async (ConnectionData, (Int, ForeignPtr PGresult))
queryRunner forall (m :: * -> *) a b. Monad m => m a -> (a -> m b) -> m b
>>= \case
Just Either SomeException (ConnectionData, (Int, ForeignPtr PGresult))
_ -> forall (m :: * -> *) a. Monad m => a -> m a
return ()
Maybe
(Either SomeException (ConnectionData, (Int, ForeignPtr PGresult)))
Nothing -> do
forall (f :: * -> *) a. Functor f => f a -> f ()
void forall a b. (a -> b) -> a -> b
$ Ptr PGconn -> IO (Maybe String)
c_PQcancel Ptr PGconn
cdPtr
forall a. Async a -> IO ()
cancel Async (ConnectionData, (Int, ForeignPtr PGresult))
queryRunner
forall (m :: * -> *) a. Monad m => a -> m a
return (Int
affected, DBState m
st {
dbLastQuery :: SomeSQL
dbLastQuery = if forall (m :: * -> *). DBState m -> Bool
dbRecordLastQuery DBState m
st then forall sql. IsSQL sql => sql -> SomeSQL
SomeSQL sql
sql else forall (m :: * -> *). DBState m -> SomeSQL
dbLastQuery DBState m
st
, dbQueryResult :: forall row. FromRow row => Maybe (QueryResult row)
dbQueryResult = forall a. a -> Maybe a
Just QueryResult {
qrSQL :: SomeSQL
qrSQL = forall sql. IsSQL sql => sql -> SomeSQL
SomeSQL sql
sql
, qrResult :: ForeignPtr PGresult
qrResult = ForeignPtr PGresult
res
, qrFromRow :: row -> row
qrFromRow = forall a. a -> a
id
}
})
where
withConnDo :: (ConnectionData -> IO (ConnectionData, (Int, ForeignPtr PGresult)))
-> IO (Int, ForeignPtr PGresult)
withConnDo = forall r.
Connection
-> String -> (ConnectionData -> IO (ConnectionData, r)) -> IO r
withConnectionData (forall (m :: * -> *). DBState m -> Connection
dbConnection DBState m
st) String
fname
verifyResult :: IsSQL sql => sql -> Ptr PGconn -> Ptr PGresult -> IO (Either Int Int)
verifyResult :: forall sql.
IsSQL sql =>
sql -> Ptr PGconn -> Ptr PGresult -> IO (Either Int Int)
verifyResult sql
sql Ptr PGconn
conn Ptr PGresult
res = do
ExecStatusType
rst <- Ptr PGresult -> IO ExecStatusType
c_PQresultStatus Ptr PGresult
res
case ExecStatusType
rst of
ExecStatusType
_ | ExecStatusType
rst forall a. Eq a => a -> a -> Bool
== ExecStatusType
c_PGRES_COMMAND_OK -> do
ByteString
sn <- Ptr PGresult -> IO CString
c_PQcmdTuples Ptr PGresult
res forall (m :: * -> *) a b. Monad m => m a -> (a -> m b) -> m b
>>= CString -> IO ByteString
BS.packCString
case ByteString -> Maybe (Int, ByteString)
BS.readInt ByteString
sn of
Maybe (Int, ByteString)
Nothing
| ByteString -> Bool
BS.null ByteString
sn -> forall (m :: * -> *) a. Monad m => a -> m a
return forall b c a. (b -> c) -> (a -> b) -> a -> c
. forall a b. a -> Either a b
Left forall a b. (a -> b) -> a -> b
$ Int
0
| Bool
otherwise -> ByteString -> IO (Either Int Int)
throwParseError ByteString
sn
Just (Int
n, ByteString
rest)
| ByteString
rest forall a. Eq a => a -> a -> Bool
/= ByteString
BS.empty -> ByteString -> IO (Either Int Int)
throwParseError ByteString
sn
| Bool
otherwise -> forall (m :: * -> *) a. Monad m => a -> m a
return forall b c a. (b -> c) -> (a -> b) -> a -> c
. forall a b. a -> Either a b
Left forall a b. (a -> b) -> a -> b
$ Int
n
ExecStatusType
_ | ExecStatusType
rst forall a. Eq a => a -> a -> Bool
== ExecStatusType
c_PGRES_TUPLES_OK -> forall a b. b -> Either a b
Right forall b c a. (b -> c) -> (a -> b) -> a -> c
. forall a b. (Integral a, Num b) => a -> b
fromIntegral forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> Ptr PGresult -> IO CInt
c_PQntuples Ptr PGresult
res
ExecStatusType
_ | ExecStatusType
rst forall a. Eq a => a -> a -> Bool
== ExecStatusType
c_PGRES_FATAL_ERROR -> IO (Either Int Int)
throwSQLError
ExecStatusType
_ | ExecStatusType
rst forall a. Eq a => a -> a -> Bool
== ExecStatusType
c_PGRES_BAD_RESPONSE -> IO (Either Int Int)
throwSQLError
ExecStatusType
_ | Bool
otherwise -> forall (m :: * -> *) a. Monad m => a -> m a
return forall b c a. (b -> c) -> (a -> b) -> a -> c
. forall a b. a -> Either a b
Left forall a b. (a -> b) -> a -> b
$ Int
0
where
throwSQLError :: IO (Either Int Int)
throwSQLError = forall sql a. IsSQL sql => sql -> SomeException -> IO a
rethrowWithContext sql
sql forall (m :: * -> *) a b. Monad m => (a -> m b) -> m a -> m b
=<< if Ptr PGresult
res forall a. Eq a => a -> a -> Bool
== forall a. Ptr a
nullPtr
then forall (m :: * -> *) a. Monad m => a -> m a
return forall b c a. (b -> c) -> (a -> b) -> a -> c
. forall e. Exception e => e -> SomeException
E.toException forall b c a. (b -> c) -> (a -> b) -> a -> c
. String -> QueryError
QueryError
forall (m :: * -> *) a b. Monad m => (a -> m b) -> m a -> m b
=<< CString -> IO String
safePeekCString' forall (m :: * -> *) a b. Monad m => (a -> m b) -> m a -> m b
=<< Ptr PGconn -> IO CString
c_PQerrorMessage Ptr PGconn
conn
else forall e. Exception e => e -> SomeException
E.toException forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> (String
-> ErrorCode
-> String
-> Maybe String
-> Maybe String
-> Maybe Int
-> Maybe Int
-> Maybe String
-> Maybe String
-> Maybe String
-> Maybe Int
-> Maybe String
-> DetailedQueryError
DetailedQueryError
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> ErrorField -> IO String
field ErrorField
c_PG_DIAG_SEVERITY
forall (f :: * -> *) a b. Applicative f => f (a -> b) -> f a -> f b
<*> (String -> ErrorCode
stringToErrorCode forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> ErrorField -> IO String
field ErrorField
c_PG_DIAG_SQLSTATE)
forall (f :: * -> *) a b. Applicative f => f (a -> b) -> f a -> f b
<*> ErrorField -> IO String
field ErrorField
c_PG_DIAG_MESSAGE_PRIMARY
forall (f :: * -> *) a b. Applicative f => f (a -> b) -> f a -> f b
<*> ErrorField -> IO (Maybe String)
mfield ErrorField
c_PG_DIAG_MESSAGE_DETAIL
forall (f :: * -> *) a b. Applicative f => f (a -> b) -> f a -> f b
<*> ErrorField -> IO (Maybe String)
mfield ErrorField
c_PG_DIAG_MESSAGE_HINT
forall (f :: * -> *) a b. Applicative f => f (a -> b) -> f a -> f b
<*> ((forall a. Read a => String -> Maybe a
mread forall (m :: * -> *) a b. Monad m => (a -> m b) -> m a -> m b
=<<) forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> ErrorField -> IO (Maybe String)
mfield ErrorField
c_PG_DIAG_STATEMENT_POSITION)
forall (f :: * -> *) a b. Applicative f => f (a -> b) -> f a -> f b
<*> ((forall a. Read a => String -> Maybe a
mread forall (m :: * -> *) a b. Monad m => (a -> m b) -> m a -> m b
=<<) forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> ErrorField -> IO (Maybe String)
mfield ErrorField
c_PG_DIAG_INTERNAL_POSITION)
forall (f :: * -> *) a b. Applicative f => f (a -> b) -> f a -> f b
<*> ErrorField -> IO (Maybe String)
mfield ErrorField
c_PG_DIAG_INTERNAL_QUERY
forall (f :: * -> *) a b. Applicative f => f (a -> b) -> f a -> f b
<*> ErrorField -> IO (Maybe String)
mfield ErrorField
c_PG_DIAG_CONTEXT
forall (f :: * -> *) a b. Applicative f => f (a -> b) -> f a -> f b
<*> ErrorField -> IO (Maybe String)
mfield ErrorField
c_PG_DIAG_SOURCE_FILE
forall (f :: * -> *) a b. Applicative f => f (a -> b) -> f a -> f b
<*> ((forall a. Read a => String -> Maybe a
mread forall (m :: * -> *) a b. Monad m => (a -> m b) -> m a -> m b
=<<) forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> ErrorField -> IO (Maybe String)
mfield ErrorField
c_PG_DIAG_SOURCE_LINE)
forall (f :: * -> *) a b. Applicative f => f (a -> b) -> f a -> f b
<*> ErrorField -> IO (Maybe String)
mfield ErrorField
c_PG_DIAG_SOURCE_FUNCTION)
where
field :: ErrorField -> IO String
field ErrorField
f = forall b a. b -> (a -> b) -> Maybe a -> b
maybe String
"" forall a. a -> a
id forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> ErrorField -> IO (Maybe String)
mfield ErrorField
f
mfield :: ErrorField -> IO (Maybe String)
mfield ErrorField
f = CString -> IO (Maybe String)
safePeekCString forall (m :: * -> *) a b. Monad m => (a -> m b) -> m a -> m b
=<< Ptr PGresult -> ErrorField -> IO CString
c_PQresultErrorField Ptr PGresult
res ErrorField
f
throwParseError :: ByteString -> IO (Either Int Int)
throwParseError ByteString
sn = forall e a. Exception e => e -> IO a
E.throwIO DBException {
dbeQueryContext :: sql
dbeQueryContext = sql
sql
, dbeError :: HPQTypesError
dbeError = String -> HPQTypesError
HPQTypesError (String
"verifyResult: string returned by PQcmdTuples is not a valid number: " forall a. [a] -> [a] -> [a]
++ forall a. Show a => a -> String
show ByteString
sn)
}