adamc@623: (** Row folding *) adamc@623: adamc@623: con folder = K ==> fn r :: {K} => adamc@623: tf :: ({K} -> Type) adamc@623: -> (nm :: Name -> v :: K -> r :: {K} -> tf r adamc@629: -> [[nm] ~ r] => tf ([nm = v] ++ r)) adamc@623: -> tf [] -> tf r adamc@623: adamc@627: structure Folder = struct adamc@631: fun fold K (r ::: {K}) (fl : folder r) = fl adamc@631: adamc@627: fun nil K (tf :: {K} -> Type) adamc@627: (f : nm :: Name -> v :: K -> r :: {K} -> tf r adamc@629: -> [[nm] ~ r] => tf ([nm = v] ++ r)) adamc@627: (i : tf []) = i adamc@627: adamc@627: fun cons K (r ::: {K}) (nm :: Name) (v :: K) [[nm] ~ r] (fold : folder r) adamc@627: (tf :: {K} -> Type) adamc@627: (f : nm :: Name -> v :: K -> r :: {K} -> tf r adamc@629: -> [[nm] ~ r] => tf ([nm = v] ++ r)) adamc@629: (i : tf []) = f [nm] [v] [r] (fold [tf] f i) ! adamc@628: adamc@628: fun concat K (r1 ::: {K}) (r2 ::: {K}) [r1 ~ r2] adamc@628: (f1 : folder r1) (f2 : folder r2) adamc@628: (tf :: {K} -> Type) adamc@628: (f : nm :: Name -> v :: K -> r :: {K} -> tf r adamc@629: -> [[nm] ~ r] => tf ([nm = v] ++ r)) adamc@628: (i : tf []) = adamc@629: f1 [fn r1' => [r1' ~ r2] => tf (r1' ++ r2)] adamc@629: (fn (nm :: Name) (v :: K) (r1' :: {K}) (acc : [r1' ~ r2] => tf (r1' ++ r2)) adamc@628: [[nm] ~ r1'] [[nm = v] ++ r1' ~ r2] => adamc@629: f [nm] [v] [r1' ++ r2] acc !) adamc@629: (fn [[] ~ r2] => f2 [tf] f i) ! adamc@630: adamc@630: fun mp K1 K2 (f ::: K1 -> K2) (r ::: {K1}) adamc@630: (fold : folder r) adamc@630: (tf :: {K2} -> Type) adamc@630: (f : nm :: Name -> v :: K2 -> r :: {K2} -> tf r adamc@630: -> [[nm] ~ r] => tf ([nm = v] ++ r)) adamc@630: (i : tf []) = adamc@630: fold [fn r => tf (map f r)] adamc@630: (fn (nm :: Name) (v :: K1) (rest :: {K1}) (acc : tf (map f rest)) [[nm] ~ rest] => adamc@630: f [nm] [f v] [map f rest] acc !) adamc@630: i adamc@627: end adamc@627: adamc@623: adamc@422: fun not b = if b then False else True adamc@422: adamc@356: con idT (t :: Type) = t adamc@356: con record (t :: {Type}) = $t adamc@637: con fst = K1 ==> K2 ==> fn t :: (K1 * K2) => t.1 adamc@637: con snd = K1 ==> K2 ==> fn t :: (K1 * K2) => t.2 adamc@637: con fst3 = K1 ==> K2 ==> K3 ==> fn t :: (K1 * K2 * K3) => t.1 adamc@637: con snd3 = K1 ==> K2 ==> K3 ==> fn t :: (K1 * K2 * K3) => t.2 adamc@637: con thd3 = K1 ==> K2 ==> K3 ==> fn t :: (K1 * K2 * K3) => t.3 adamc@329: adamc@621: con mapUT = fn f :: Type => map (fn _ :: Unit => f) adamc@445: adamc@339: con ex = fn tf :: (Type -> Type) => adamc@356: res ::: Type -> (choice :: Type -> tf choice -> res) -> res adamc@339: adamc@339: fun ex (tf :: (Type -> Type)) (choice :: Type) (body : tf choice) : ex tf = adamc@356: fn (res ::: Type) (f : choice :: Type -> tf choice -> res) => adamc@356: f [choice] body adamc@339: adamc@356: fun compose (t1 ::: Type) (t2 ::: Type) (t3 ::: Type) adamc@356: (f1 : t2 -> t3) (f2 : t1 -> t2) (x : t1) = f1 (f2 x) adamc@325: adamc@564: fun txt (t ::: Type) (ctx ::: {Unit}) (use ::: {Type}) (_ : show t) (v : t) = adamc@564: cdata (show v) adamc@328: adamc@411: fun foldUR (tf :: Type) (tr :: {Unit} -> Type) adamc@411: (f : nm :: Name -> rest :: {Unit} adamc@629: -> [[nm] ~ rest] => adamc@411: tf -> tr rest -> tr ([nm] ++ rest)) adamc@632: (i : tr []) (r :: {Unit}) (fold : folder r)= adamc@411: fold [fn r :: {Unit} => $(mapUT tf r) -> tr r] adamc@623: (fn (nm :: Name) (t :: Unit) (rest :: {Unit}) acc adamc@623: [[nm] ~ rest] r => adamc@629: f [nm] [rest] ! r.nm (acc (r -- nm))) adamc@623: (fn _ => i) adamc@411: adamc@418: fun foldUR2 (tf1 :: Type) (tf2 :: Type) (tr :: {Unit} -> Type) adamc@418: (f : nm :: Name -> rest :: {Unit} adamc@629: -> [[nm] ~ rest] => adamc@418: tf1 -> tf2 -> tr rest -> tr ([nm] ++ rest)) adamc@632: (i : tr []) (r :: {Unit}) (fold : folder r) = adamc@418: fold [fn r :: {Unit} => $(mapUT tf1 r) -> $(mapUT tf2 r) -> tr r] adamc@623: (fn (nm :: Name) (t :: Unit) (rest :: {Unit}) acc adamc@623: [[nm] ~ rest] r1 r2 => adamc@629: f [nm] [rest] ! r1.nm r2.nm (acc (r1 -- nm) (r2 -- nm))) adamc@623: (fn _ _ => i) adamc@418: adamc@418: fun foldURX2 (tf1 :: Type) (tf2 :: Type) (ctx :: {Unit}) adamc@418: (f : nm :: Name -> rest :: {Unit} adamc@629: -> [[nm] ~ rest] => adamc@418: tf1 -> tf2 -> xml ctx [] []) = adamc@418: foldUR2 [tf1] [tf2] [fn _ => xml ctx [] []] adamc@418: (fn (nm :: Name) (rest :: {Unit}) [[nm] ~ rest] v1 v2 acc => adamc@629: {f [nm] [rest] ! v1 v2}{acc}) adamc@418: adamc@418: adamc@623: fun foldR K (tf :: K -> Type) (tr :: {K} -> Type) adamc@623: (f : nm :: Name -> t :: K -> rest :: {K} adamc@629: -> [[nm] ~ rest] => adamc@356: tf t -> tr rest -> tr ([nm = t] ++ rest)) adamc@632: (i : tr []) (r :: {K}) (fold : folder r) = adamc@623: fold [fn r :: {K} => $(map tf r) -> tr r] adamc@623: (fn (nm :: Name) (t :: K) (rest :: {K}) (acc : _ -> tr rest) adamc@356: [[nm] ~ rest] r => adamc@629: f [nm] [t] [rest] ! r.nm (acc (r -- nm))) adamc@356: (fn _ => i) adamc@336: adamc@623: fun foldR2 K (tf1 :: K -> Type) (tf2 :: K -> Type) (tr :: {K} -> Type) adamc@623: (f : nm :: Name -> t :: K -> rest :: {K} adamc@629: -> [[nm] ~ rest] => adamc@367: tf1 t -> tf2 t -> tr rest -> tr ([nm = t] ++ rest)) adamc@632: (i : tr []) (r :: {K}) (fold : folder r) = adamc@623: fold [fn r :: {K} => $(map tf1 r) -> $(map tf2 r) -> tr r] adamc@623: (fn (nm :: Name) (t :: K) (rest :: {K}) adamc@623: (acc : _ -> _ -> tr rest) [[nm] ~ rest] r1 r2 => adamc@629: f [nm] [t] [rest] ! r1.nm r2.nm (acc (r1 -- nm) (r2 -- nm))) adamc@623: (fn _ _ => i) adamc@332: adamc@623: fun foldRX K (tf :: K -> Type) (ctx :: {Unit}) adamc@623: (f : nm :: Name -> t :: K -> rest :: {K} adamc@629: -> [[nm] ~ rest] => adamc@356: tf t -> xml ctx [] []) = adamc@623: foldR [tf] [fn _ => xml ctx [] []] adamc@623: (fn (nm :: Name) (t :: K) (rest :: {K}) [[nm] ~ rest] r acc => adamc@629: {f [nm] [t] [rest] ! r}{acc}) adamc@623: adamc@336: adamc@623: fun foldRX2 K (tf1 :: K -> Type) (tf2 :: K -> Type) (ctx :: {Unit}) adamc@623: (f : nm :: Name -> t :: K -> rest :: {K} adamc@629: -> [[nm] ~ rest] => adamc@356: tf1 t -> tf2 t -> xml ctx [] []) = adamc@623: foldR2 [tf1] [tf2] [fn _ => xml ctx [] []] adamc@623: (fn (nm :: Name) (t :: K) (rest :: {K}) [[nm] ~ rest] adamc@623: r1 r2 acc => adamc@629: {f [nm] [t] [rest] ! r1 r2}{acc}) adamc@623: adamc@445: adamc@356: fun queryX (tables ::: {{Type}}) (exps ::: {Type}) (ctx ::: {Unit}) adamc@632: [tables ~ exps] (q : sql_query tables exps) adamc@621: (f : $(exps ++ map (fn fields :: {Type} => $fields) tables) adamc@356: -> xml ctx [] []) = adamc@356: query q adamc@356: (fn fs acc => return {acc}{f fs}) adamc@360: adamc@341: adamc@469: fun queryX' (tables ::: {{Type}}) (exps ::: {Type}) (ctx ::: {Unit}) adamc@632: [tables ~ exps] (q : sql_query tables exps) adamc@621: (f : $(exps ++ map (fn fields :: {Type} => $fields) tables) adamc@469: -> transaction (xml ctx [] [])) = adamc@469: query q adamc@469: (fn fs acc => adamc@469: r <- f fs; adamc@469: return {acc}{r}) adamc@469: adamc@469: adamc@356: fun oneOrNoRows (tables ::: {{Type}}) (exps ::: {Type}) adamc@629: [tables ~ exps] adamc@629: (q : sql_query tables exps) = adamc@356: query q adamc@356: (fn fs _ => return (Some fs)) adamc@356: None adamc@440: adamc@440: fun oneRow (tables ::: {{Type}}) (exps ::: {Type}) adamc@629: [tables ~ exps] (q : sql_query tables exps) = adamc@440: o <- oneOrNoRows q; adamc@440: return (case o of adamc@440: None => error Query returned no rows adamc@440: | Some r => r) adamc@440: adamc@470: fun eqNullable (tables ::: {{Type}}) (agg ::: {{Type}}) (exps ::: {Type}) adamc@470: (t ::: Type) (_ : sql_injectable (option t)) adamc@470: (e1 : sql_exp tables agg exps (option t)) adamc@470: (e2 : sql_exp tables agg exps (option t)) = adamc@471: (SQL ({e1} IS NULL AND {e2} IS NULL) OR {e1} = {e2}) adamc@470: adamc@470: fun eqNullable' (tables ::: {{Type}}) (agg ::: {{Type}}) (exps ::: {Type}) adamc@564: (t ::: Type) (_ : sql_injectable (option t)) adamc@470: (e1 : sql_exp tables agg exps (option t)) adamc@470: (e2 : option t) = adamc@470: case e2 of adamc@471: None => (SQL {e1} IS NULL) adamc@564: | Some _ => sql_binary sql_eq e1 (sql_inject e2)