Re: [Haskell-beginners] monad and variable result

Hy Damien, On Mon, Dec 10, 2018 at 11:32:23AM +0100, Damien Mattei wrote:

i want the variable local_bd_rows accessible in the 'where' clause

does `query` return IO ()? If so, no you can't*. Once the result is inside IO, it stays in IO. Move what you need inside out of where (and inside a `do`) and get ready to change the signature of `getBD` to getBD :: Connection -> String -> IO Float -F * (you can with unsafeSomething functions, but it is really really advisable not to do that).