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{-# LANGUAGE FlexibleContexts #-} | |
module ArrowQuery ( | |
module Database.Relational.Query, | |
query, queryMaybe, query', queryMaybe', wheres, having, groupBy, placeholder, | |
relation, relation', aggregateRelation, aggregateRelation', | |
QuerySimple, QueryAggregate, | |
) where | |
import Control.Arrow | |
import Database.Record | |
import Database.Relational.Query hiding | |
(query, queryMaybe, query', queryMaybe', wheres, having, groupBy, placeholder, | |
relation, relation', aggregateRelation, aggregateRelation', | |
QuerySimple, QueryAggregate) | |
import qualified Database.Relational.Query as Query | |
type QuerySimple = Kleisli Query.QuerySimple | |
type QueryAggregate = Kleisli Query.QueryAggregate | |
query :: MonadQualify ConfigureQuery m => | |
Kleisli m (Query.Relation () r) (Projection Flat r) | |
query = Kleisli Query.query | |
queryMaybe :: MonadQualify ConfigureQuery m => | |
Kleisli m (Query.Relation () r) (Projection Flat (Maybe r)) | |
queryMaybe = Kleisli Query.queryMaybe | |
query' :: MonadQualify ConfigureQuery m => | |
Kleisli m (Query.Relation p r) (PlaceHolders p, Projection Flat r) | |
query' = Kleisli Query.query' | |
queryMaybe' :: MonadQualify ConfigureQuery m => | |
Kleisli m (Query.Relation p r) (PlaceHolders p, Projection Flat (Maybe r)) | |
queryMaybe' = Kleisli Query.queryMaybe' | |
wheres :: MonadRestrict Flat m => | |
Kleisli m (Projection Flat (Maybe Bool)) () | |
wheres = Kleisli Query.wheres | |
having :: MonadRestrict Aggregated m => | |
Kleisli m (Projection Aggregated (Maybe Bool)) () | |
having = Kleisli Query.having | |
groupBy :: MonadAggregate m => | |
Kleisli m (Projection Flat r) (Projection Aggregated r) | |
groupBy = Kleisli Query.groupBy | |
placeholder :: (PersistableWidth t, SqlProjectable p, Monad m) => | |
Kleisli m (Kleisli m (p t) a) (PlaceHolders t, a) | |
placeholder = Kleisli $ Query.placeholder . runKleisli | |
relation :: QuerySimple () (Projection Flat r) -> Relation () r | |
relation = Query.relation . (`runKleisli` ()) | |
relation' :: QuerySimple () (PlaceHolders p, Projection Flat r) | |
-> Relation p r | |
relation' = Query.relation' . (`runKleisli` ()) | |
aggregateRelation :: QueryAggregate () (Projection Aggregated r) | |
-> Relation () r | |
aggregateRelation = Query.aggregateRelation . (`runKleisli` ()) | |
aggregateRelation' :: QueryAggregate () (PlaceHolders p, Projection Aggregated r) | |
-> Relation p r | |
aggregateRelation' = Query.aggregateRelation' . (`runKleisli` ()) |
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