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|
open Printf
open Sqlite3
let () =
let db = db_open "t" in
create_fun2 db "REGEX" (fun s rex ->
match rex, s with
| Data.TEXT rex, Data.BLOB s
| Data.TEXT rex, Data.TEXT s ->
let r = Str.regexp rex in
if Str.string_match r s 0 then Data.INT 1L else Data.INT 0L
| _ -> raise (Error "wrong types to 'REGEX'"));
let sqls =
[
"DROP TABLE IF EXISTS tbl";
"CREATE TABLE tbl (a varchar(10), b INTEGER, c FLOAT)";
"INSERT INTO tbl VALUES ('pippo', 3, 3.14)";
"SELECT * FROM tbl where REGEX(a,'^pippo$')";
"SELECT * FROM tbl where REGEX(a,'^ippo')";
"SELECT * FROM tbl where REGEX(a,'[^z]*')";
]
in
List.iter (fun sql ->
try
let res =
exec db sql ~cb:(fun row _ ->
match row.(0), row.(1), row.(2) with
| Some a, Some b, Some c -> printf "%s|%s|%s\n" a b c
| _ -> ())
in
match res with
| Rc.OK -> ()
| r ->
prerr_endline (Rc.to_string r);
prerr_endline (errmsg db)
with Error s -> prerr_endline s)
sqls
|
