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Document Rel8.Table.Order

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Ollie Charles 2021-03-24 11:43:29 +00:00
parent 5a2ea3683f
commit cdc620da23
1 changed files with 4 additions and 0 deletions
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src/Rel8/Table/Order.hs
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@ -28,6 +28,8 @@ import Rel8.Table.Ord
import Rel8.Type.Ord import Rel8.Type.Ord
-- | Construct an 'Order' for a 'Table' by sorting all columns into ascending
-- orders (any nullable columns will be sorted with @NULLS FIRST@).
ascTable :: forall a. OrdTable a => Order a ascTable :: forall a. OrdTable a => Order a
ascTable = contramap toColumns $ getConst $ ascTable = contramap toColumns $ getConst $
htabulateA @(Columns a) $ \field -> case hfield hspecs field of htabulateA @(Columns a) $ \field -> case hfield hspecs field of
@ -39,6 +41,8 @@ ascTable = contramap toColumns $ getConst $
ords = hdicts @(Columns a) @(ConstrainDBType DBOrd) ords = hdicts @(Columns a) @(ConstrainDBType DBOrd)
-- | Construct an 'Order' for a 'Table' by sorting all columns into descending
-- orders (any nullable columns will be sorted with @NULLS LAST@).
descTable :: forall a. OrdTable a => Order a descTable :: forall a. OrdTable a => Order a
descTable = contramap toColumns $ getConst $ descTable = contramap toColumns $ getConst $
htabulateA @(Columns a) $ \field -> case hfield hspecs field of htabulateA @(Columns a) $ \field -> case hfield hspecs field of