--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/sql.sig	Tue Mar 25 02:04:06 2014 -0400
@@ -0,0 +1,79 @@
+signature SQL = sig
+
+val fu : Mono.file -> unit
+
+val debug : bool ref
+
+type lvar
+
+datatype func =
+         DtCon0 of string
+       | DtCon1 of string
+       | UnCon of string
+       | Other of string
+
+datatype exp =
+         Const of Prim.t
+       | Var of int
+       | Lvar of lvar
+       | Func of func * exp list
+       | Recd of (string * exp) list
+       | Proj of exp * string
+
+datatype reln =
+         Known
+       | Sql of string
+       | PCon0 of string
+       | PCon1 of string
+       | Eq
+       | Ne
+       | Lt
+       | Le
+       | Gt
+       | Ge
+
+datatype prop =
+         True
+       | False
+       | Unknown
+       | And of prop * prop
+       | Or of prop * prop
+       | Reln of reln * exp list
+       | Cond of exp * prop
+
+datatype ('a, 'b) sum = inl of 'a | inr of 'b
+
+datatype Rel =
+         Exps of exp * exp -> prop
+       | Props of prop * prop -> prop
+
+datatype sqexp =
+         SqConst of Prim.t
+       | SqTrue
+       | SqFalse
+       | SqNot of sqexp
+       | Field of string * string
+       | Computed of string
+       | Binop of Rel * sqexp * sqexp
+       | SqKnown of sqexp
+       | Inj of Mono.exp
+       | SqFunc of string * sqexp
+       | Unmodeled
+       | Null
+
+datatype sitem =
+         SqField of string * string
+       | SqExp of sqexp * string
+
+type query1
+
+datatype query =
+         Query1 of query1
+       | Union of query * query
+
+datatype dml =
+         Insert of string * (string * sqexp) list
+       | Delete of string * sqexp
+       | Update of string * (string * sqexp) list * sqexp
+
+end