150 lines
3.5 KiB
Plaintext
150 lines
3.5 KiB
Plaintext
# 2009 April 20
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#
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# The author disclaims copyright to this source code. In place of
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# a legal notice, here is a blessing:
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#
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# May you do good and not evil.
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# May you find forgiveness for yourself and forgive others.
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# May you share freely, never taking more than you give.
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#
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#***********************************************************************
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#
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# Test cases inspired by ticket #3811. Tests to make sure that
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# the journal_mode can only be changed at appropriate times and that
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# all reported changes are effective.
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#
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# $Id: jrnlmode3.test,v 1.5 2009/04/20 17:43:03 drh Exp $
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set testdir [file dirname $argv0]
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source $testdir/tester.tcl
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ifcapable {!pager_pragmas} {
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finish_test
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return
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}
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#
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# Verify that journal_mode=OFF works as long as it occurs before the first
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# transaction, even if locking_mode=EXCLUSIVE is enabled. The behavior if
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# journal_mode is changed after the first transaction is undefined and hence
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# untested.
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#
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do_test jrnlmode3-1.1 {
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db eval {
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PRAGMA journal_mode=OFF;
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PRAGMA locking_mode=EXCLUSIVE;
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CREATE TABLE t1(x);
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INSERT INTO t1 VALUES(1);
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SELECT * FROM t1;
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}
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} {off exclusive 1}
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do_test jrnlmode3-1.2 {
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db eval {
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BEGIN;
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INSERT INTO t1 VALUES(2);
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ROLLBACK;
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SELECT * FROM t1;
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}
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} {1}
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db close
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forcedelete test.db test.db-journal
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sqlite3 db test.db
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do_test jrnlmode3-2.1 {
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db eval {
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PRAGMA locking_mode=EXCLUSIVE;
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PRAGMA journal_mode=OFF;
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CREATE TABLE t1(x);
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INSERT INTO t1 VALUES(1);
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SELECT * FROM t1;
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}
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} {exclusive off 1}
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do_test jrnlmode3-2.2 {
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db eval {
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BEGIN;
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INSERT INTO t1 VALUES(2);
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ROLLBACK;
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SELECT * FROM t1;
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}
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} {1}
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# Test cases to verify that we can move from any journal_mode
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# to any other, as long as we are not in a transaction. Verify
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# that we cannot change journal_mode while a transaction is active.
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#
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set all_journal_modes {delete persist truncate memory off}
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set cnt 0
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foreach fromjmode $all_journal_modes {
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foreach tojmode $all_journal_modes {
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# Skip the no-change cases
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if {$fromjmode==$tojmode} continue
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incr cnt
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# Start with a fresh database connection an empty database file.
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#
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db close
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forcedelete test.db test.db-journal
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sqlite3 db test.db
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# Initialize the journal mode.
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#
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do_test jrnlmode3-3.$cnt.1-($fromjmode-to-$tojmode) {
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db eval "PRAGMA journal_mode = $fromjmode;"
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} $fromjmode
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# Verify that the initial journal mode takes.
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#
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do_test jrnlmode3-3.$cnt.2 {
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db eval {PRAGMA main.journal_mode}
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} $fromjmode
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# Start a transaction and try to change the journal mode within
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# the transaction. This should fail.
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#
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do_test jrnlmode3-3.$cnt.3 {
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db eval {
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CREATE TABLE t1(x);
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BEGIN;
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INSERT INTO t1 VALUES($cnt);
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}
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db eval "PRAGMA journal_mode=$tojmode"
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} $fromjmode
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# Rollback the transaction.
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#
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do_test jrnlmode3-3.$cnt.4 {
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db eval {
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ROLLBACK;
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SELECT * FROM t1;
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}
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} {}
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# Now change the journal mode again. This time the new mode
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# should take.
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#
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do_test jrnlmode3-3.$cnt.5 {
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db eval "PRAGMA journal_mode=$tojmode"
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} $tojmode
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# Do a the transaction. Verify that the rollback occurred
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# if journal_mode!=OFF.
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#
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do_test jrnlmode3-3.$cnt.6 {
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db eval {
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DROP TABLE IF EXISTS t1;
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CREATE TABLE t1(x);
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BEGIN;
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INSERT INTO t1 VALUES(1);
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}
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db eval ROLLBACK
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db eval {
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SELECT * FROM t1;
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}
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} {}
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}
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}
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finish_test
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