/trunk/test/tkt2854.test |
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# 2007 December 20 |
# |
# The author disclaims copyright to this source code. In place of |
# a legal notice, here is a blessing: |
# |
# May you do good and not evil. |
# May you find forgiveness for yourself and forgive others. |
# May you share freely, never taking more than you give. |
# |
#*********************************************************************** |
# |
# $Id: tkt2854.test,v 1.4 2009/03/16 13:19:36 danielk1977 Exp $ |
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set testdir [file dirname $argv0] |
source $testdir/tester.tcl |
db close |
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ifcapable !shared_cache { |
finish_test |
return |
} |
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set ::enable_shared_cache [sqlite3_enable_shared_cache 1] |
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# Open 3 database connections. Connection "db" and "db2" share a cache. |
# Connection "db3" has its own cache. |
# |
do_test tkt2854-1.1 { |
sqlite3 db test.db |
sqlite3 db2 test.db |
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# This is taken from shared.test. The Windows VFS expands |
# ./test.db (and test.db) to be the same thing so the path |
# matches and they share a cache. By changing the case |
# for Windows platform, we get around this and get a separate |
# connection. |
if {$::tcl_platform(platform)=="unix"} { |
sqlite3 db3 ./test.db |
} else { |
sqlite3 db3 TEST.DB |
} |
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db eval { |
CREATE TABLE abc(a, b, c); |
} |
} {} |
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# Check that an exclusive lock cannot be obtained if some other |
# shared-cache connection has a read-lock on a table. |
# |
do_test tkt2854-1.2 { |
execsql { |
BEGIN; |
SELECT * FROM abc; |
} db2 |
} {} |
do_test tkt2854-1.3 { |
catchsql { BEGIN EXCLUSIVE } db |
} {1 {database table is locked}} |
do_test tkt2854-1.4 { |
execsql { SELECT * FROM abc } db3 |
} {} |
do_test tkt2854-1.5 { |
catchsql { INSERT INTO abc VALUES(1, 2, 3) } db3 |
} {1 {database is locked}} |
do_test tkt2854-1.6 { |
execsql { COMMIT } db2 |
} {} |
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# Check that an exclusive lock prevents other shared-cache users from |
# starting a transaction. |
# |
do_test tkt2854-1.7 { |
set ::DB2 [sqlite3_connection_pointer db2] |
set ::STMT1 [sqlite3_prepare $DB2 "SELECT * FROM abc" -1 TAIL] |
set ::STMT2 [sqlite3_prepare $DB2 "BEGIN EXCLUSIVE" -1 TAIL] |
set ::STMT3 [sqlite3_prepare $DB2 "BEGIN IMMEDIATE" -1 TAIL] |
set ::STMT4 [sqlite3_prepare $DB2 "BEGIN" -1 TAIL] |
set ::STMT5 [sqlite3_prepare $DB2 "COMMIT" -1 TAIL] |
execsql { BEGIN EXCLUSIVE } db |
} {} |
do_test tkt2854-1.8 { |
catchsql { BEGIN EXCLUSIVE } db2 |
} {1 {database schema is locked: main}} |
do_test tkt2854-1.9 { |
catchsql { BEGIN IMMEDIATE } db2 |
} {1 {database schema is locked: main}} |
do_test tkt2854-1.10 { |
# This fails because the schema of main cannot be verified. |
catchsql { BEGIN } db2 |
} {1 {database schema is locked: main}} |
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# Check that an exclusive lock prevents other shared-cache users from |
# reading the database. Use stored statements so that the error occurs |
# at the b-tree level, not the schema level. |
# |
do_test tkt2854-1.11 { |
list [sqlite3_step $::STMT1] [sqlite3_finalize $::STMT1] |
} {SQLITE_ERROR SQLITE_LOCKED} |
do_test tkt2854-1.12 { |
list [sqlite3_step $::STMT2] [sqlite3_finalize $::STMT2] |
} {SQLITE_ERROR SQLITE_LOCKED} |
do_test tkt2854-1.13 { |
list [sqlite3_step $::STMT3] [sqlite3_finalize $::STMT3] |
} {SQLITE_ERROR SQLITE_LOCKED} |
do_test tkt2854-1.14 { |
# A regular "BEGIN" doesn't touch any databases. So it succeeds. |
list [sqlite3_step $::STMT4] [sqlite3_finalize $::STMT4] |
} {SQLITE_DONE SQLITE_OK} |
do_test tkt2854-1.15 { |
# As does a COMMIT. |
list [sqlite3_step $::STMT5] [sqlite3_finalize $::STMT5] |
} {SQLITE_DONE SQLITE_OK} |
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# Try to read the database using connection "db3" (which does not share |
# a cache with "db"). The database should be locked. |
do_test tkt2854-1.16 { |
catchsql { SELECT * FROM abc } db3 |
} {1 {database is locked}} |
do_test tkt2854-1.17 { |
execsql { COMMIT } db |
} {} |
do_test tkt2854-1.18 { |
execsql { SELECT * FROM abc } db2 |
} {} |
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# Check that if an attempt to obtain an exclusive lock fails because an |
# attached db cannot be locked, the internal exclusive flag used by |
# shared-cache users is correctly cleared. |
do_test tkt2854-1.19 { |
file delete -force test2.db test2.db-journal |
sqlite3 db4 test2.db |
execsql { CREATE TABLE def(d, e, f) } db4 |
execsql { ATTACH 'test2.db' AS aux } db |
} {} |
do_test tkt2854-1.20 { |
execsql {BEGIN IMMEDIATE} db4 |
catchsql {BEGIN EXCLUSIVE} db |
} {1 {database table is locked}} |
do_test tkt2854-1.21 { |
execsql {SELECT * FROM abc} db2 |
} {} |
|
db close |
db2 close |
db3 close |
db4 close |
sqlite3_enable_shared_cache $::enable_shared_cache |
finish_test |