-(* PostgreSQL backend ******************************************************)
-
-let pg_query h table cols ct cfl =
- let exec q =
- if C.set h C.Queries then C.log h (q ^ "\n");
- P.exec (C.pgc h) q
- in
- let rec iter f sep = function
- | [] -> ""
- | [head] -> f head
- | head :: tail -> f head ^ sep ^ iter f sep tail
- in
- let avs_iter f sep v =
- let aux a s = function
- | true -> a ^ (f s) ^ sep
- | false -> a ^ (f s)
- in
- I.iter aux "" v
- in
- let pg_cols = iter (fun x -> x) ", " cols in
- let pg_msval v = avs_iter P.quote ", " v in
- let pg_con (pat, col, v) =
- if col <> "" then
- let f s = col ^ " ~ " ^ P.quote ("^" ^ s ^ "$") in
- if pat then "(" ^ avs_iter f " or " v ^ ")"
- else match I.single v with
- | Some s -> col ^ " = " ^ (P.quote s)
- | None -> col ^ " in (" ^ pg_msval v ^ ")"
- else "true"
- in
- let pg_cons l = iter pg_con " and " l in
- let pg_cons_not l = "not (" ^ pg_cons l ^ ")" in
- let pg_cons_not_l ll = iter pg_cons_not " and " ll in
- let pg_where = match ct, cfl with
- | [], [] -> ""
- | lt, [] -> " where " ^ pg_cons lt
- | [], llf -> " where " ^ pg_cons_not_l llf
- | lt, llf -> " where " ^ pg_cons lt ^ " and " ^ pg_cons_not_l llf
- in
- if cols = [] then
- let r = exec ("select count (source) from " ^ table ^ pg_where) in
- match r with
- | [[s]] when int_of_string s > 0 -> [[]]
- | _ -> []
- else
- exec ("select " ^ pg_cols ^ " from " ^ table ^ pg_where ^
- " order by " ^ List.hd cols ^ " asc") (* desc *)
-
-(* Galax backend ***********************************************************)
-
-let gx_query h table cols ct cfl = not_supported "Galax"
-