blob: d648f31e1cf84c3c4394f7c949be3fb6901c1fe5 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
|
functor Make(M : sig
type data
val inj : sql_injectable data
end) = struct
type ref = int
sequence s
table t : { Id : int, Data : M.data }
fun new d =
id <- nextval s;
dml (INSERT INTO t (Id, Data) VALUES ({id}, {d}));
return id
fun read r =
o <- oneOrNoRows (SELECT t.Data FROM t WHERE t.Id = {r});
return (case o of
None => error <xml>You already deleted that ref!</xml>
| Some r => r.T.Data)
fun write r d =
dml (UPDATE t SET Data = {d} WHERE Id = {r})
fun delete r =
dml (DELETE FROM t WHERE Id = {r})
end
|
