Tom Pledger writes:
> This is a pretty good way to stop those nasty vague SQL row types at
> the Haskell border and turn them into something respectable. Perhaps
> it would even be worth constraining the extracted type to be in
> DeepSeq
>
> doquery :: (DeepSeq v) =>
> Process -> String -> IO v -> IO [v]
Can you explain what the constraint does here?
Although I haven't touched the db interface in the meantime, when/if I
do,
I'll probably generalise the query function to do a fold, rathen than
always
accumulate a list:
doquery :: Process -> String -> (a -> b -> IO b) -> b -> IO b
Tim
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