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Add document of class method.

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Kei Hibino 2013-06-10 20:10:54 +09:00
parent 441bf8f81c
commit 85b4f603d3
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relational-join/src/Database/Relational/Query/Expr.hs
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@ -56,6 +56,7 @@ stringExprSQL = ('\'':) . (++ "'") . escapeStringToSqlExpr
-- | Interface for constant SQL expression.
class ShowConstantSQL a where
-- | Make constant SQL expression 'String' from Haskell type 'a'.
showConstantSQL :: a -> String
-- | Constant SQL expression of 'Int16'.