adam@6: fun sqexps [env] [fields] (fl : folder fields) (inj : $(map sql_injectable fields)) (r : $fields) =
adam@6:     @map2 [sql_injectable] [id] [sql_exp env [] []]
adam@6:      (fn [t] => @sql_inject)
adam@6:      fl inj r
adam@6: 
adam@6: fun selector [tn :: Name] [fs] [ofs] [fs ~ ofs] (fl : folder fs) (m : $(map sql_injectable fs)) (r : $fs) =
adam@6:     @foldR2 [sql_injectable] [id]
adam@6:      [fn key => rest :: {Type} -> [rest ~ key] => sql_exp [tn = key ++ rest] [] [] bool]
adam@6:      (fn [nm :: Name] [t :: Type] [key :: {Type}] [[nm] ~ key]
adam@6:                       (inj : sql_injectable t) (v : t)
adam@6:                       (exp : rest :: {Type} -> [rest ~ key] => sql_exp [tn = key ++ rest] [] [] bool)
adam@6:                       [rest :: {Type}] [rest ~ [nm = t] ++ key] =>
adam@6:          (WHERE {{tn}}.{nm} = {@sql_inject inj v} AND {exp [[nm = t] ++ rest] !}))
adam@6:      (fn [rest :: {Type}] [rest ~ []] => (WHERE TRUE))
adam@6:      fl m r [_] !