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| 1 # 2009 April 20 |
| 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 # |
| 12 # Test cases inspired by ticket #3811. Tests to make sure that |
| 13 # the journal_mode can only be changed at appropriate times and that |
| 14 # all reported changes are effective. |
| 15 # |
| 16 # $Id: jrnlmode3.test,v 1.5 2009/04/20 17:43:03 drh Exp $ |
| 17 |
| 18 set testdir [file dirname $argv0] |
| 19 source $testdir/tester.tcl |
| 20 |
| 21 ifcapable {!pager_pragmas} { |
| 22 finish_test |
| 23 return |
| 24 } |
| 25 |
| 26 # |
| 27 # Verify that journal_mode=OFF works as long as it occurs before the first |
| 28 # transaction, even if locking_mode=EXCLUSIVE is enabled. The behavior if |
| 29 # journal_mode is changed after the first transaction is undefined and hence |
| 30 # untested. |
| 31 # |
| 32 do_test jrnlmode3-1.1 { |
| 33 db eval { |
| 34 PRAGMA journal_mode=OFF; |
| 35 PRAGMA locking_mode=EXCLUSIVE; |
| 36 CREATE TABLE t1(x); |
| 37 INSERT INTO t1 VALUES(1); |
| 38 SELECT * FROM t1; |
| 39 } |
| 40 } {off exclusive 1} |
| 41 do_test jrnlmode3-1.2 { |
| 42 db eval { |
| 43 BEGIN; |
| 44 INSERT INTO t1 VALUES(2); |
| 45 ROLLBACK; |
| 46 SELECT * FROM t1; |
| 47 } |
| 48 } {1} |
| 49 |
| 50 db close |
| 51 file delete -force test.db test.db-journal |
| 52 sqlite3 db test.db |
| 53 |
| 54 do_test jrnlmode3-2.1 { |
| 55 db eval { |
| 56 PRAGMA locking_mode=EXCLUSIVE; |
| 57 PRAGMA journal_mode=OFF; |
| 58 CREATE TABLE t1(x); |
| 59 INSERT INTO t1 VALUES(1); |
| 60 SELECT * FROM t1; |
| 61 } |
| 62 } {exclusive off 1} |
| 63 do_test jrnlmode3-2.2 { |
| 64 db eval { |
| 65 BEGIN; |
| 66 INSERT INTO t1 VALUES(2); |
| 67 ROLLBACK; |
| 68 SELECT * FROM t1; |
| 69 } |
| 70 } {1} |
| 71 |
| 72 # Test cases to verify that we can move from any journal_mode |
| 73 # to any other, as long as we are not in a transaction. Verify |
| 74 # that we cannot change journal_mode while a transaction is active. |
| 75 # |
| 76 set all_journal_modes {delete persist truncate memory off} |
| 77 set cnt 0 |
| 78 foreach fromjmode $all_journal_modes { |
| 79 foreach tojmode $all_journal_modes { |
| 80 |
| 81 # Skip the no-change cases |
| 82 if {$fromjmode==$tojmode} continue |
| 83 incr cnt |
| 84 |
| 85 # Start with a fresh database connection an empty database file. |
| 86 # |
| 87 db close |
| 88 file delete -force test.db test.db-journal |
| 89 sqlite3 db test.db |
| 90 |
| 91 # Initialize the journal mode. |
| 92 # |
| 93 do_test jrnlmode3-3.$cnt.1-($fromjmode-to-$tojmode) { |
| 94 db eval "PRAGMA journal_mode = $fromjmode;" |
| 95 } $fromjmode |
| 96 |
| 97 # Verify that the initial journal mode takes. |
| 98 # |
| 99 do_test jrnlmode3-3.$cnt.2 { |
| 100 db eval {PRAGMA main.journal_mode} |
| 101 } $fromjmode |
| 102 |
| 103 # Start a transaction and try to change the journal mode within |
| 104 # the transaction. This should fail. |
| 105 # |
| 106 do_test jrnlmode3-3.$cnt.3 { |
| 107 db eval { |
| 108 CREATE TABLE t1(x); |
| 109 BEGIN; |
| 110 INSERT INTO t1 VALUES($cnt); |
| 111 } |
| 112 db eval "PRAGMA journal_mode=$tojmode" |
| 113 } $fromjmode |
| 114 |
| 115 # Rollback the transaction. |
| 116 # |
| 117 do_test jrnlmode3-3.$cnt.4 { |
| 118 db eval { |
| 119 ROLLBACK; |
| 120 SELECT * FROM t1; |
| 121 } |
| 122 } {} |
| 123 |
| 124 # Now change the journal mode again. This time the new mode |
| 125 # should take. |
| 126 # |
| 127 do_test jrnlmode3-3.$cnt.5 { |
| 128 db eval "PRAGMA journal_mode=$tojmode" |
| 129 } $tojmode |
| 130 |
| 131 # Do a the transaction. Verify that the rollback occurred |
| 132 # if journal_mode!=OFF. |
| 133 # |
| 134 do_test jrnlmode3-3.$cnt.6 { |
| 135 db eval { |
| 136 DROP TABLE IF EXISTS t1; |
| 137 CREATE TABLE t1(x); |
| 138 BEGIN; |
| 139 INSERT INTO t1 VALUES(1); |
| 140 } |
| 141 db eval ROLLBACK |
| 142 db eval { |
| 143 SELECT * FROM t1; |
| 144 } |
| 145 } {} |
| 146 } |
| 147 } |
| 148 |
| 149 finish_test |
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