xref: /sqlite-3.40.0/test/bigmmap.test (revision 1da477d3) 
1# 2017 August 07
2#
3# The author disclaims copyright to this source code.  In place of
4# a legal notice, here is a blessing:
5#
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.
9#
10#***********************************************************************
11# This file implements regression tests for SQLite library.  The
12# focus of this script testing the ability of SQLite to use mmap
13# to access files larger than 4GiB.
14#
15
16if {[file exists skip-big-file]} return
17if {$tcl_platform(os)=="Darwin"} return
18
19set testdir [file dirname $argv0]
20source $testdir/tester.tcl
21set testprefix bigmmap
22
23ifcapable !mmap||!vtab {
24  finish_test
25  return
26}
27
28set mmap_limit 0
29db eval {
30  SELECT compile_options AS x FROM pragma_compile_options
31  WHERE x LIKE 'max_mmap_size=%'
32} {
33  regexp {MAX_MMAP_SIZE=([0-9]*)} $x -> mmap_limit
34}
35if {$mmap_limit < [expr 8 * 1<<30]} {
36  puts "Skipping bigmmap.test - requires SQLITE_MAX_MMAP_SIZE >= 8G"
37  finish_test
38  return
39}
40
41
42#-------------------------------------------------------------------------
43# Create the database file roughly 8GiB in size. Most pages are unused,
44# except that there is a table and index clustered around each 1GiB
45# boundary.
46#
47do_execsql_test 1.0 {
48  PRAGMA page_size = 4096;
49  CREATE TABLE t0(a INTEGER PRIMARY KEY, b, c, UNIQUE(b, c));
50  WITH  s(i) AS ( SELECT 1 UNION ALL SELECT i+1 FROM s LIMIT 100 )
51  INSERT INTO t0 SELECT i, 't0', randomblob(800) FROM s;
52}
53
54for {set i 1} {$i < 8} {incr i} {
55  if {[catch {fake_big_file [expr $i*1024] [get_pwd]/test.db}]} {
56    puts "Cannot create ${i}MB sparse file"
57    finish_test
58    return
59  }
60  hexio_write test.db 28 [format %.8x [expr ($i*1024*1024*1024/4096) - 5]]
61
62  do_execsql_test 1.$i "
63    CREATE TABLE t$i (a INTEGER PRIMARY KEY, b, c, UNIQUE(b, c));
64    WITH  s(i) AS ( SELECT 1 UNION ALL SELECT i+1 FROM s LIMIT 100 )
65      INSERT INTO t$i SELECT i, 't$i', randomblob(800) FROM s;
66  "
67}
68
69#-------------------------------------------------------------------------
70# Check that data can be retrieved from the db with a variety of
71# configured mmap size limits.
72#
73for {set i 0} {$i < 9} {incr i} {
74
75  # Configure a memory mapping $i GB in size.
76  #
77  set val [expr $i*1024*1024*1024]
78  execsql "PRAGMA main.mmap_size = $val"
79  do_execsql_test 2.$i.0 {
80    PRAGMA main.mmap_size
81  } $val
82
83  for {set t 0} {$t < 8} {incr t} {
84    do_execsql_test 2.$i.$t.1 "
85      SELECT count(*) FROM t$t;
86      SELECT count(b || c) FROM t$t GROUP BY b;
87    " {100 100}
88
89    do_execsql_test 2.$i.$t.2 "
90      SELECT * FROM t$t AS o WHERE
91        NOT EXISTS( SELECT * FROM t$t AS i WHERE a=o.a AND +b=o.b AND +c=o.c )
92      ORDER BY b, c;
93    " {}
94
95    do_eqp_test 2.$i.$t.3 "
96      SELECT * FROM t$t AS o WHERE
97        NOT EXISTS( SELECT * FROM t$t AS i WHERE a=o.a AND +b=o.b AND +c=o.c )
98      ORDER BY b, c;
99    " [string map {"\n    " "\n"} "
100      QUERY PLAN
101      |--SCAN o USING COVERING INDEX sqlite_autoindex_t${t}_1
102      `--CORRELATED SCALAR SUBQUERY xxxxxx
103         `--SEARCH i USING INTEGER PRIMARY KEY (rowid=?)
104    "]
105  }
106}
107
108finish_test
109