3 # The author disclaims copyright to this source code. In place of
4 # a legal notice, here is a blessing:
6 # May you do good and not evil.
7 # May you find forgiveness for yourself and forgive others.
8 # May you share freely, never taking more than you give.
10 #***********************************************************************
11 # This file implements regression tests for SQLite library. The
12 # focus of this script testing the ability of SQLite to handle database
13 # files larger than 4GB.
16 if {[file exists skip-big-file]} return
17 if {$tcl_platform(os)=="Darwin"} return
19 set testdir [file dirname $argv0]
20 source $testdir/tester.tcl
21 set testprefix bigfile2
23 # Create a small database.
26 CREATE TABLE t1(a, b);
27 INSERT INTO t1 VALUES(1, 2);
30 # Pad the file out to 4GB in size. Then clear the file-size field in the
31 # db header. This will cause SQLite to assume that the first 4GB of pages
32 # are actually in use and new pages will be appended to the file.
35 if {[catch {fake_big_file 4096 [get_pwd]/test.db} msg]} {
36 puts "**** Unable to create a file larger than 4096 MB. *****"
40 hexio_write test.db 28 00000000
44 } [expr 14 + 4096 * (1<<20)]
46 # Now insert a large row. The overflow pages will be located past the 4GB
47 # boundary. Then, after opening and closing the database, test that the row
48 # can be read back in.
50 set str [string repeat k 30000]
53 execsql { INSERT INTO t1 VALUES(3, $str) }
56 db one { SELECT b FROM t1 WHERE a = 3 }