1# 2010 November 1 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 file is testing that WAL databases may be accessed without 13# using the xShm primitives if the connection is in exclusive-mode. 14# 15 16set testdir [file dirname $argv0] 17source $testdir/tester.tcl 18set testprefix walnoshm 19ifcapable !wal {finish_test ; return } 20 21db close 22testvfs tvfsshm 23testvfs tvfs -default 1 -iversion 1 24sqlite3 db test.db 25 26#-------------------------------------------------------------------------- 27# Test that when using a version 1 VFS, a database can only be converted 28# to WAL mode after setting locking_mode=EXCLUSIVE. Also, test that if a 29# WAL database is opened using heap-memory for the WAL index, the connection 30# cannot change back to locking_mode=NORMAL while the database is still in 31# WAL mode. 32# 33do_execsql_test 1.1 { 34 CREATE TABLE t1(x, y); 35 INSERT INTO t1 VALUES(1, 2); 36} 37 38do_execsql_test 1.2 { 39 PRAGMA journal_mode = WAL; 40 SELECT * FROM t1; 41} {delete 1 2} 42do_test 1.3 { file exists test.db-wal } {0} 43 44do_execsql_test 1.4 { 45 PRAGMA locking_mode = exclusive; 46 PRAGMA journal_mode = WAL; 47 SELECT * FROM t1; 48} {exclusive wal 1 2} 49do_test 1.5 { file exists test.db-wal } {1} 50 51do_execsql_test 1.6 { INSERT INTO t1 VALUES(3, 4) } 52 53do_execsql_test 1.7 { 54 PRAGMA locking_mode = normal; 55} {exclusive} 56do_execsql_test 1.8 { 57 PRAGMA journal_mode = delete; 58 PRAGMA main.locking_mode; 59} {delete exclusive} 60do_execsql_test 1.9 { 61 PRAGMA locking_mode = normal; 62} {normal} 63do_execsql_test 1.10 { 64 SELECT * FROM t1; 65} {1 2 3 4} 66do_test 1.11 { file exists test.db-wal } {0} 67 68#------------------------------------------------------------------------- 69# 70# 2.1.*: Test that a connection using a version 1 VFS can open a WAL database 71# and convert it to rollback mode if it is set to use 72# locking_mode=exclusive. 73# 74# 2.2.*: Test that if the exclusive lock cannot be obtained while attempting 75# the above, the operation fails and the WAL file is not opened. 76# 77do_execsql_test 2.1.1 { 78 CREATE TABLE t2(x, y); 79 INSERT INTO t2 VALUES('a', 'b'); 80 INSERT INTO t2 VALUES('c', 'd'); 81} 82do_execsql_test 2.1.2 { 83 PRAGMA locking_mode = exclusive; 84 PRAGMA journal_mode = WAL; 85 INSERT INTO t2 VALUES('e', 'f'); 86 INSERT INTO t2 VALUES('g', 'h'); 87} {exclusive wal} 88 89do_test 2.1.3 { 90 forcecopy test.db test2.db 91 forcecopy test.db-wal test2.db-wal 92 sqlite3 db2 test2.db 93 catchsql { SELECT * FROM t2 } db2 94} {1 {unable to open database file}} 95do_test 2.1.4 { 96 catchsql { PRAGMA journal_mode = delete } db2 97} {1 {unable to open database file}} 98do_test 2.1.5 { 99 execsql { 100 PRAGMA locking_mode = exclusive; 101 PRAGMA journal_mode = delete; 102 SELECT * FROM t2; 103 } db2 104} {exclusive delete a b c d e f g h} 105 106do_test 2.2.1 { 107 forcecopy test.db test2.db 108 forcecopy test.db-wal test2.db-wal 109 sqlite3 db3 test2.db -vfs tvfsshm 110 sqlite3 db2 test2.db 111 execsql { SELECT * FROM t2 } db3 112} {a b c d e f g h} 113 114do_test 2.2.2 { 115 execsql { PRAGMA locking_mode = exclusive } db2 116 catchsql { PRAGMA journal_mode = delete } db2 117} {1 {database is locked}} 118 119do_test 2.2.3 { 120 # This is to test that [db2] is not holding a PENDING lock (which can 121 # happen when an attempt to obtain an EXCLUSIVE lock fails). 122 sqlite3 db4 test2.db -vfs tvfsshm 123 execsql { SELECT * FROM t2 } db4 124} {a b c d e f g h} 125 126do_test 2.2.4 { 127 catchsql { SELECT * FROM t2 } db2 128} {1 {database is locked}} 129 130do_test 2.2.5 { 131 db4 close 132 sqlite3 db4 test2.db -vfs tvfsshm 133 execsql { SELECT * FROM t2 } db4 134} {a b c d e f g h} 135 136do_test 2.2.6 { 137 db3 close 138 db4 close 139 execsql { SELECT * FROM t2 } db2 140} {a b c d e f g h} 141 142db2 close 143db close 144 145#------------------------------------------------------------------------- 146# 147# 3.1: Test that if locking_mode=EXCLUSIVE is set after the wal file is 148# opened, it is possible to drop back to locking_mode=NORMAL. 149# 150# 3.2: Test that if locking_mode=EXCLUSIVE is set before the wal file is 151# opened, it is not. 152# 153do_test 3.1 { 154 sqlite3 db test.db -vfs tvfsshm 155 execsql { 156 SELECT * FROM t1; 157 PRAGMA locking_mode = EXCLUSIVE; 158 INSERT INTO t1 VALUES(5, 6); 159 PRAGMA locking_mode = NORMAL; 160 INSERT INTO t1 VALUES(7, 8); 161 } 162 sqlite3 db2 test.db -vfs tvfsshm 163 execsql { SELECT * FROM t1 } db2 164} {1 2 3 4 5 6 7 8} 165db close 166db2 close 167do_test 3.2 { 168 sqlite3 db test.db -vfs tvfsshm 169 execsql { 170 PRAGMA locking_mode = EXCLUSIVE; 171 INSERT INTO t1 VALUES(9, 10); 172 PRAGMA locking_mode = NORMAL; 173 INSERT INTO t1 VALUES(11, 12); 174 } 175 sqlite3 db2 test.db -vfs tvfsshm 176 catchsql { SELECT * FROM t1 } db2 177} {1 {database is locked}} 178db close 179db2 close 180 181tvfs delete 182tvfsshm delete 183 184finish_test 185