| Copyright | 2013 Kei Hibino |
|---|---|
| License | BSD3 |
| Maintainer | [email protected] |
| Stability | experimental |
| Portability | unknown |
| Safe Haskell | None |
| Language | Haskell2010 |
Database.Relational.Query.Monad.Class
Contents
Description
This module defines query building interface classes.
- class (Functor q, Monad q, MonadQuery m) => MonadQualify q m where
- liftQualify :: q a -> m a
- class (Functor q, Monad q, MonadQuery m) => MonadQualifyUnique q m where
- liftQualifyUnique :: q a -> m a
- class (Functor m, Monad m) => MonadRestrict c m where
- restrictContext :: Expr c (Maybe Bool) -> m ()
- class (Functor m, Monad m) => MonadQuery m where
- setDuplication :: Duplication -> m ()
- restrictJoin :: Expr Flat (Maybe Bool) -> m ()
- unsafeSubQuery :: NodeAttr -> Qualified SubQuery -> m (Projection Flat r)
- class MonadQuery m => MonadAggregate m where
- unsafeAddAggregateElement :: AggregateElem -> m ()
- class Monad m => MonadPartition m where
- unsafeAddPartitionKey :: AggregateColumnRef -> m ()
- all' :: MonadQuery m => m ()
- distinct :: MonadQuery m => m ()
- restrict :: MonadRestrict c m => Projection c (Maybe Bool) -> m ()
- onE :: MonadQuery m => Expr Flat (Maybe Bool) -> m ()
- on :: MonadQuery m => Projection Flat (Maybe Bool) -> m ()
- wheresE :: MonadRestrict Flat m => Expr Flat (Maybe Bool) -> m ()
- wheres :: MonadRestrict Flat m => Projection Flat (Maybe Bool) -> m ()
- groupBy :: MonadAggregate m => Projection Flat r -> m (Projection Aggregated r)
- havingE :: MonadRestrict Aggregated m => Expr Aggregated (Maybe Bool) -> m ()
- having :: MonadRestrict Aggregated m => Projection Aggregated (Maybe Bool) -> m ()
Query interface classes
class (Functor q, Monad q, MonadQuery m) => MonadQualify q m where Source
Lift interface from base qualify monad.
Methods
liftQualify :: q a -> m a Source
Lift from qualify monad q into MonadQuery m.
Qualify monad qualifies table form SubQuery.
Instances
| MonadQualify ConfigureQuery QueryAggregate | Instance to lift from qualified table forms into |
| MonadQualify ConfigureQuery (Orderings Flat QueryCore) | Instance to lift from qualified table forms into |
class (Functor q, Monad q, MonadQuery m) => MonadQualifyUnique q m where Source
Lift interface from base qualify monad. Another constraint to support unique query.
Methods
liftQualifyUnique :: q a -> m a Source
Lift from qualify monad q into MonadQuery m.
Qualify monad qualifies table form SubQuery.
Instances
| MonadQualifyUnique ConfigureQuery QueryUnique | Instance to lift from qualified table forms into |
class (Functor m, Monad m) => MonadRestrict c m where Source
Restrict context interface
Methods
Arguments
| :: Expr c (Maybe Bool) |
|
| -> m () | Restricted query context |
Add restriction to this context.
Instances
| MonadRestrict c m => MonadRestrict c (AggregatingSetT m) | Aggregated |
| (Monad q, Functor q) => MonadRestrict c (Restrictings c q) |
|
| MonadRestrict rc m => MonadRestrict rc (Orderings c m) |
|
| MonadRestrict c m => MonadRestrict c (Assignings r m) |
|
| MonadRestrict Flat q => MonadRestrict Flat (Restrictings Aggregated q) | Restricted |
class (Functor m, Monad m) => MonadQuery m where Source
Query building interface.
Methods
setDuplication :: Duplication -> m () Source
Specify duplication.
Arguments
| :: Expr Flat (Maybe Bool) |
|
| -> m () | Restricted query context | Unsafely join subquery with this query. |
Add restriction to last join.
Instances
| MonadQuery QueryUnique | |
| MonadQuery m => MonadQuery (AggregatingSetT m) | Aggregated |
| (Monad q, Functor q) => MonadQuery (QueryJoin q) | Joinable query instance. |
| MonadQuery q => MonadQuery (Restrictings c q) | Restricted |
| MonadQuery m => MonadQuery (Orderings c m) |
|
class MonadQuery m => MonadAggregate m where Source
Aggregated query building interface extends MonadQuery.
Methods
unsafeAddAggregateElement Source
Arguments
| :: AggregateElem | Grouping element to add into group by clause |
| -> m () | Result context |
Add group by term into context and get aggregated projection.
Instances
| MonadQuery m => MonadAggregate (AggregatingSetT m) | Aggregated query instance. |
| MonadAggregate m => MonadAggregate (Restrictings c m) | Resticted |
| MonadAggregate m => MonadAggregate (Orderings c m) |
|
class Monad m => MonadPartition m where Source
Window specification building interface.
Methods
Arguments
| :: AggregateColumnRef | Partitioning key to add into partition by clause |
| -> m () | Result context |
Instances
| Monad m => MonadPartition (PartitioningSetT c m) | Partition clause instance |
| MonadPartition m => MonadPartition (Orderings c m) |
|
all' :: MonadQuery m => m () Source
Specify ALL attribute to query context.
distinct :: MonadQuery m => m () Source
Specify DISTINCT attribute to query context.
restrict :: MonadRestrict c m => Projection c (Maybe Bool) -> m () Source
Add restriction to this query.
on :: MonadQuery m => Projection Flat (Maybe Bool) -> m () Source
Add restriction to last join. Projection type version.
wheresE :: MonadRestrict Flat m => Expr Flat (Maybe Bool) -> m () Source
Add restriction to this query. Expr type version.
wheres :: MonadRestrict Flat m => Projection Flat (Maybe Bool) -> m () Source
Add restriction to this not aggregated query.
Arguments
| :: MonadAggregate m | |
| => Projection Flat r | Projection to add into group by |
| -> m (Projection Aggregated r) | Result context and aggregated projection |
Add GROUP BY term into context and get aggregated projection.
havingE :: MonadRestrict Aggregated m => Expr Aggregated (Maybe Bool) -> m () Source
Add restriction to this aggregated query. Expr type version.
having :: MonadRestrict Aggregated m => Projection Aggregated (Maybe Bool) -> m () Source
Add restriction to this aggregated query. Aggregated Projection type version.