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1. type PI c a b = Record c a -> Record c b

   relational-query	Database.Relational

   Type for projection function.

2. type Predicate c = Record c Maybe Bool

   relational-query	Database.Relational

   Type for predicate to restrict of query result.

3. data Primary

   relational-query	Database.Relational

   Constraint type. Primary key.

4. type PI c a b = Record c a -> Record c b

   relational-query	Database.Relational.Arrow

   Type for projection function.

5. PUNotSupported :: ProductUnitSupport

   relational-query	Database.Relational.Arrow

   No documentation available.

6. PUSupported :: ProductUnitSupport

   relational-query	Database.Relational.Arrow

   No documentation available.

7. data Pi r0 r1

   relational-query	Database.Relational.Arrow

   Projection path from type r0 into type r1. This type also indicate key object which type is r1 for record type r0.

8. data PlaceHolders p

   relational-query	Database.Relational.Arrow

   Placeholder parameter type which has real parameter type argument p.

9. data Power

   relational-query	Database.Relational.Arrow

   Type tag for aggregatings power set

10. type Predicate c = Record c Maybe Bool

    relational-query	Database.Relational.Arrow

    Type for predicate to restrict of query result.

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