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 file is testing for correct handling of I/O errors
13 # such as writes failing because the disk is full.
15 # The tests in this file use special facilities that are only
16 # available in the SQLite test fixture.
18 # $Id: ioerr2.test,v 1.12 2009/06/05 17:09:12 drh Exp $
20 set testdir [file dirname $argv0]
21 source $testdir/tester.tcl
23 ifcapable !integrityck {
30 PRAGMA cache_size = 10;
31 PRAGMA default_cache_size = 10;
32 CREATE TABLE t1(a, b, PRIMARY KEY(a, b));
33 INSERT INTO t1 VALUES(randstr(400,400),randstr(400,400));
34 INSERT INTO t1 SELECT randstr(400,400), randstr(400,400) FROM t1; -- 2
35 INSERT INTO t1 SELECT randstr(400,400), randstr(400,400) FROM t1; -- 4
36 INSERT INTO t1 SELECT randstr(400,400), randstr(400,400) FROM t1; -- 8
37 INSERT INTO t1 SELECT randstr(400,400), randstr(400,400) FROM t1; -- 16
38 INSERT INTO t1 SELECT randstr(400,400), randstr(400,400) FROM t1; -- 32
42 set ::cksum [execsql {SELECT md5sum(a, b) FROM t1}]
43 proc check_db {testname} {
45 # Make sure no I/O errors are simulated in this proc.
46 set ::sqlite_io_error_hit 0
47 set ::sqlite_io_error_persist 0
48 set ::sqlite_io_error_pending 0
50 # Run an integrity-check. If "disk I/O error" is returned, the
51 # pager must be in error state. In this case open a new database
52 # connection. Otherwise, try a ROLLBACK, in case a transaction
54 set rc [catch {execsql {PRAGMA integrity_check}} msg]
55 if {$rc && ($msg eq "disk I/O error" || $msg eq "database is locked")} {
60 if {$rc || $msg ne "ok"} {
63 catch {execsql ROLLBACK}
66 # Check that the database checksum is still $::cksum, and that
67 # the integrity-check passes.
68 set ck [execsql {SELECT md5sum(a, b) FROM t1}]
69 do_test ${testname}.cksum [list set ck $ck] $::cksum
70 integrity_check ${testname}.integrity
71 do_test ${testname}.refcnt {
72 lindex [sqlite3_pager_refcounts db] 0
79 PRAGMA cache_size = 10;
80 PRAGMA default_cache_size = 10;
82 DELETE FROM t1 WHERE (oid%7)==0;
83 INSERT INTO t1 SELECT randstr(400,400), randstr(400,400)
84 WHERE (random()%7)==0;
85 UPDATE t1 SET a = randstr(400,400), b = randstr(400,400)
86 WHERE (random()%7)==0;
90 foreach bPersist [list 0 1] {
92 for {set ::N 1} {$::go} {incr ::N} {
95 set ::sqlite_io_error_hit 0
96 set ::sqlite_io_error_persist $bPersist
97 set ::sqlite_io_error_pending $::N
99 foreach {::go res} [catchsql $sql] {}
100 check_db ioerr2-3.$bPersist.$::N
103 foreach bPersist [list 0 1] {
105 for {set ::N 1} {$::go} {incr ::N} {
106 set ::sqlite_io_error_hit 0
107 set ::sqlite_io_error_persist $bPersist
108 set ::sqlite_io_error_pending $::N
110 foreach {::go res} [catchsql $sql] {}
111 check_db ioerr2-4.[expr {$bPersist+2}].$::N
115 # When this test was written, an IO error within the UPDATE statement caused
116 # a rollback, which tripped all read-cursors, causing the outer SELECT to
117 # fail with "abort due to ROLLBACK". Now, the loop continues until the UPDATE
118 # is run successfully. At this point the next IO error occurs within the
119 # SELECT - throwing the "disk I/O error" that the test case now expects.
123 CREATE TABLE t2 AS SELECT * FROM t1;
124 PRAGMA temp_store = memory;
126 set ::sqlite_io_error_persist 0
129 for {set ::N 2} {$::N<200} {incr ::N} {
130 db eval {SELECT * FROM t1 WHERE rowid IN (1, 5, 10, 15, 20)} {
131 set ::sqlite_io_error_hit 0
132 set ::sqlite_io_error_pending $::N
133 set sql {UPDATE t2 SET b = randstr(400,400)}
134 foreach {::go res} [catchsql $sql] {}
139 } {1 {disk I/O error}} ;# used to be "{1 {abort due to ROLLBACK}}"
141 if {$::tcl_platform(platform) == "unix"} {
142 # Cause the call to xAccess used by [pragma temp_store_directory] to
143 # determine if the specified directory is writable to fail. This causes
144 # SQLite to report "not a writable directory", which is probably the
148 set ::sqlite_io_error_hit 0
149 set ::sqlite_io_error_pending 1
150 catchsql {PRAGMA temp_store_directory = '/tmp/'}
151 } {1 {not a writable directory}}
154 do_ioerr_test ioerr2-7 -persist 0 -sqlprep {
155 PRAGMA cache_size = 10;
156 PRAGMA auto_vacuum = 1;
157 CREATE TABLE ab(a, b);
158 CREATE TABLE de(d, e);
159 INSERT INTO ab VALUES(1, randstr(200,200));
160 INSERT INTO ab SELECT a+1, randstr(200,200) FROM ab;
161 INSERT INTO ab SELECT a+2, randstr(200,200) FROM ab;
162 INSERT INTO ab SELECT a+4, randstr(200,200) FROM ab;
163 INSERT INTO ab SELECT a+8, randstr(200,200) FROM ab;
164 INSERT INTO ab SELECT a+16, randstr(200,200) FROM ab;
165 INSERT INTO ab SELECT a+32, randstr(200,200) FROM ab;
166 INSERT INTO ab SELECT a+64, randstr(200,200) FROM ab;
167 INSERT INTO de SELECT * FROM ab;
170 UPDATE ab SET b = randstr(200,200);
171 UPDATE de SET e = randstr(200,200) WHERE d = (SELECT max(d) FROM de);