git.iko.soy/rel8
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Document DBSum
3c86905Ollie Charles
src/Rel8/Type/Sum.hs+1
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unifiedsplit
@@ -22,6 +22,7 @@ import Data.Scientific ( Scientific )
22import Data.Time.Clock ( DiffTime, NominalDiffTime )
22import Data.Time.Clock ( DiffTime, NominalDiffTime )
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25+-- | The class of database types that support the @sum()@ aggregation function.
25type DBSum :: Type -> Constraint
26type DBSum :: Type -> Constraint
26class DBType a => DBSum a
27class DBType a => DBSum a
27instance DBSum Int16
28instance DBSum Int16