/trunk/test/shared6.test |
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# 2009 April 01 |
# |
# 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: shared6.test,v 1.4 2009/06/05 17:09:12 drh Exp $ |
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set testdir [file dirname $argv0] |
source $testdir/tester.tcl |
ifcapable !shared_cache { finish_test ; return } |
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do_test shared6-1.1.1 { |
execsql { |
CREATE TABLE t1(a, b); |
CREATE TABLE t2(c, d); |
CREATE TABLE t3(e, f); |
} |
db close |
} {} |
do_test shared6-1.1.2 { |
set ::enable_shared_cache [sqlite3_enable_shared_cache 1] |
sqlite3_enable_shared_cache |
} {1} |
|
do_test shared6-1.1.3 { |
sqlite3 db1 test.db |
sqlite3 db2 test.db |
} {} |
|
# Exclusive shared-cache locks. Test the following: |
# |
# 1.2.1: If [db1] has an exclusive lock, [db2] cannot read. |
# 1.2.2: If [db1] has an exclusive lock, [db1] can read. |
# 1.2.3: If [db1] has a non-exclusive write-lock, [db2] can read. |
# |
do_test shared6-1.2.1 { |
execsql { SELECT * FROM t1 } db2 ;# Cache a compiled statement |
execsql { BEGIN EXCLUSIVE } db1 |
catchsql { SELECT * FROM t1 } db2 ;# Execute the cached compiled statement |
} {1 {database table is locked}} |
do_test shared6-1.2.2 { |
execsql { SELECT * FROM t1 } db1 |
} {} |
do_test shared6-1.2.3 { |
execsql { |
COMMIT; |
BEGIN; |
INSERT INTO t2 VALUES(3, 4); |
} db1 |
execsql { SELECT * FROM t1 } db2 |
} {} |
do_test shared6-1.2.X { |
execsql { COMMIT } db1 |
} {} |
|
# Regular shared-cache locks. Verify the following: |
# |
# 1.3.1: If [db1] has a write-lock on t1, [db1] can read from t1. |
# 1.3.2: If [db1] has a write-lock on t1, [db2] can read from t2. |
# 1.3.3: If [db1] has a write-lock on t1, [db2] cannot read from t1. |
# 1.3.4: If [db1] has a write-lock on t1, [db2] cannot write to t1. |
# 1.3.5: If [db1] has a read-lock on t1, [db2] can read from t1. |
# 1.3.6: If [db1] has a read-lock on t1, [db2] cannot write to t1. |
# |
do_test shared6-1.3.1 { |
execsql { |
BEGIN; |
INSERT INTO t1 VALUES(1, 2); |
} db1 |
execsql { SELECT * FROM t1 } db1 |
} {1 2} |
do_test shared6-1.3.2 { |
execsql { SELECT * FROM t2 } db2 |
} {3 4} |
do_test shared6-1.3.3 { |
catchsql { SELECT * FROM t1 } db2 |
} {1 {database table is locked: t1}} |
do_test shared6-1.3.4 { |
catchsql { INSERT INTO t2 VALUES(1, 2) } db2 |
} {1 {database table is locked}} |
do_test shared6-1.3.5 { |
execsql { |
COMMIT; |
BEGIN; |
SELECT * FROM t1; |
} db1 |
execsql { SELECT * FROM t1 } db2 |
} {1 2} |
do_test shared6-1.3.5 { |
catchsql { INSERT INTO t1 VALUES(5, 6) } db2 |
} {1 {database table is locked: t1}} |
do_test shared6-1.3.X { |
execsql { COMMIT } db1 |
} {} |
|
# Read-uncommitted mode. |
# |
# For these tests, connection [db2] is in read-uncommitted mode. |
# |
# 1.4.1: If [db1] has a write-lock on t1, [db2] can still read from t1. |
# 1.4.2: If [db1] has a write-lock on the db schema (sqlite_master table), |
# [db2] cannot read from the schema. |
# 1.4.3: If [db1] has a read-lock on t1, [db2] cannot write to t1. |
# |
do_test shared6-1.4.1 { |
execsql { PRAGMA read_uncommitted = 1 } db2 |
execsql { |
BEGIN; |
INSERT INTO t1 VALUES(5, 6); |
} db1 |
execsql { SELECT * FROM t1 } db2 |
} {1 2 5 6} |
do_test shared6-1.4.2 { |
execsql { CREATE TABLE t4(a, b) } db1 |
catchsql { SELECT * FROM t1 } db2 |
} {1 {database table is locked}} |
do_test shared6-1.4.3 { |
execsql { |
COMMIT; |
BEGIN; |
SELECT * FROM t1; |
} db1 |
catchsql { INSERT INTO t1 VALUES(7, 8) } db2 |
} {1 {database table is locked: t1}} |
|
do_test shared6-1.X { |
db1 close |
db2 close |
} {} |
|
#------------------------------------------------------------------------- |
# The following tests - shared6-2.* - test that two database connections |
# that connect to the same file using different VFS implementations do |
# not share a cache. |
# |
if {$::tcl_platform(platform) eq "unix"} { |
do_test shared6-2.1 { |
sqlite3 db1 test.db -vfs unix |
sqlite3 db2 test.db -vfs unix |
sqlite3 db3 test.db -vfs unix-none |
sqlite3 db4 test.db -vfs unix-none |
} {} |
|
do_test shared6-2.2 { |
execsql { BEGIN; INSERT INTO t1 VALUES(9, 10); } db1 |
catchsql { SELECT * FROM t1 } db2 |
} {1 {database table is locked: t1}} |
do_test shared6-2.3 { |
execsql { SELECT * FROM t1 } db3 |
} {1 2 5 6} |
|
do_test shared6-2.3 { |
execsql { COMMIT } db1 |
execsql { BEGIN; INSERT INTO t1 VALUES(11, 12); } db3 |
catchsql { SELECT * FROM t1 } db4 |
} {1 {database table is locked: t1}} |
|
do_test shared6-2.4 { |
execsql { SELECT * FROM t1 } db1 |
} {1 2 5 6 9 10} |
|
do_test shared6-2.5 { |
execsql { COMMIT } db3 |
} {} |
|
do_test shared6-2.X { |
db1 close |
db2 close |
db3 close |
db4 close |
} {} |
} |
|
#------------------------------------------------------------------------- |
# Test that it is possible to open an exclusive transaction while |
# already holding a read-lock on the database file. And that it is |
# not possible if some other connection holds such a lock. |
# |
do_test shared6-3.1 { |
sqlite3 db1 test.db |
sqlite3 db2 test.db |
sqlite3 db3 test.db |
} {} |
db1 eval {SELECT * FROM t1} { |
# Within this block [db1] is holding a read-lock on t1. Test that |
# this means t1 cannot be written by [db2]. |
# |
do_test shared6-3.2 { |
catchsql { INSERT INTO t1 VALUES(1, 2) } db2 |
} {1 {database table is locked: t1}} |
|
do_test shared6-3.3 { |
execsql { BEGIN EXCLUSIVE } db1 |
} {} |
break |
} |
do_test shared6-3.4 { |
catchsql { SELECT * FROM t1 } db2 |
} {1 {database schema is locked: main}} |
do_test shared6-3.5 { |
execsql COMMIT db1 |
} {} |
db2 eval {SELECT * FROM t1} { |
do_test shared6-3.6 { |
catchsql { BEGIN EXCLUSIVE } db1 |
} {1 {database table is locked}} |
break |
} |
do_test shared6-3.7 { |
execsql { BEGIN } db1 |
execsql { BEGIN } db2 |
} {} |
db2 eval {SELECT * FROM t1} { |
do_test shared6-3.8 { |
catchsql { INSERT INTO t1 VALUES(1, 2) } db1 |
} {1 {database table is locked: t1}} |
break |
} |
do_test shared6-3.9 { |
execsql { BEGIN ; ROLLBACK } db3 |
} {} |
do_test shared6-3.10 { |
catchsql { SELECT * FROM t1 } db3 |
} {1 {database table is locked}} |
do_test shared6-3.X { |
db1 close |
db2 close |
db3 close |
} {} |
|
do_test shared6-4.1 { |
#file delete -force test.db test.db-journal |
sqlite3 db1 test.db |
sqlite3 db2 test.db |
|
set ::STMT [sqlite3_prepare_v2 db1 "SELECT * FROM t1" -1 DUMMY] |
execsql { CREATE TABLE t5(a, b) } db2 |
} {} |
do_test shared6-4.2 { |
sqlite3_finalize $::STMT |
} {SQLITE_OK} |
do_test shared6-4.X { |
|
db1 close |
db2 close |
} {} |
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sqlite3_enable_shared_cache $::enable_shared_cache |
finish_test |