xref: /sqlite-3.40.0/test/bigmmap.test (revision aeb4e6ee) 
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  fake_big_file [expr $i*1024] [get_pwd]/test.db
56  hexio_write test.db 28 [format %.8x [expr ($i*1024*1024*1024/4096) - 5]]
57
58  do_execsql_test 1.$i "
59    CREATE TABLE t$i (a INTEGER PRIMARY KEY, b, c, UNIQUE(b, c));
60    WITH  s(i) AS ( SELECT 1 UNION ALL SELECT i+1 FROM s LIMIT 100 )
61      INSERT INTO t$i SELECT i, 't$i', randomblob(800) FROM s;
62  "
63}
64
65#-------------------------------------------------------------------------
66# Check that data can be retrieved from the db with a variety of
67# configured mmap size limits.
68#
69for {set i 0} {$i < 9} {incr i} {
70
71  # Configure a memory mapping $i GB in size.
72  #
73  set val [expr $i*1024*1024*1024]
74  execsql "PRAGMA main.mmap_size = $val"
75  do_execsql_test 2.$i.0 {
76    PRAGMA main.mmap_size
77  } $val
78
79  for {set t 0} {$t < 8} {incr t} {
80    do_execsql_test 2.$i.$t.1 "
81      SELECT count(*) FROM t$t;
82      SELECT count(b || c) FROM t$t GROUP BY b;
83    " {100 100}
84
85    do_execsql_test 2.$i.$t.2 "
86      SELECT * FROM t$t AS o WHERE
87        NOT EXISTS( SELECT * FROM t$t AS i WHERE a=o.a AND +b=o.b AND +c=o.c )
88      ORDER BY b, c;
89    " {}
90
91    do_eqp_test 2.$i.$t.3 "
92      SELECT * FROM t$t AS o WHERE
93        NOT EXISTS( SELECT * FROM t$t AS i WHERE a=o.a AND +b=o.b AND +c=o.c )
94      ORDER BY b, c;
95    " [string map {"\n    " "\n"} "
96      QUERY PLAN
97      |--SCAN TABLE t$t AS o USING COVERING INDEX sqlite_autoindex_t${t}_1
98      `--CORRELATED SCALAR SUBQUERY xxxxxx
99         `--SEARCH TABLE t$t AS i USING INTEGER PRIMARY KEY (rowid=?)
100    "]
101  }
102}
103
104finish_test
105