# 2011 May 09
#
# 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.
#
#***********************************************************************
#
# This file contains tests for using WAL databases in read-only mode.
#
set testdir [file dirname $argv0]
source $testdir/tester.tcl
source $testdir/lock_common.tcl
set ::testprefix walro
# These tests are only going to work on unix.
#
if {$::tcl_platform(platform) != "unix"} {
finish_test
return
}
# And only if the build is WAL-capable.
#
ifcapable !wal {
finish_test
return
}
do_multiclient_test tn {
# Close all connections and delete the database.
#
code1 { db close }
code2 { db2 close }
code3 { db3 close }
forcedelete test.db
forcedelete walro
# Do not run tests with the connections in the same process.
#
if {$tn==2} continue
foreach c {code1 code2 code3} {
$c {
sqlite3_shutdown
sqlite3_config_uri 1
}
}
file mkdir walro
do_test 1.1.1 {
code2 { sqlite3 db2 test.db }
sql2 {
PRAGMA auto_vacuum = 0;
PRAGMA journal_mode = WAL;
CREATE TABLE t1(x, y);
INSERT INTO t1 VALUES('a', 'b');
}
file exists test.db-shm
} {1}
do_test 1.1.2 {
file attributes test.db-shm -permissions r--r--r--
code1 { sqlite3 db file:test.db?readonly_shm=1 }
} {}
do_test 1.1.3 { sql1 "SELECT * FROM t1" } {a b}
do_test 1.1.4 { sql2 "INSERT INTO t1 VALUES('c', 'd')" } {}
do_test 1.1.5 { sql1 "SELECT * FROM t1" } {a b c d}
# Check that the read-only connection cannot write or checkpoint the db.
#
do_test 1.1.6 {
csql1 "INSERT INTO t1 VALUES('e', 'f')"
} {1 {attempt to write a readonly database}}
do_test 1.1.7 {
csql1 "PRAGMA wal_checkpoint"
} {1 {attempt to write a readonly database}}
do_test 1.1.9 { sql2 "INSERT INTO t1 VALUES('e', 'f')" } {}
do_test 1.1.10 { sql1 "SELECT * FROM t1" } {a b c d e f}
do_test 1.1.11 {
sql2 {
INSERT INTO t1 VALUES('g', 'h');
PRAGMA wal_checkpoint;
}
set {} {}
} {}
do_test 1.1.12 { sql1 "SELECT * FROM t1" } {a b c d e f g h}
do_test 1.1.13 { sql2 "INSERT INTO t1 VALUES('i', 'j')" } {}
do_test 1.2.1 {
code2 { db2 close }
code1 { db close }
list [file exists test.db-wal] [file exists test.db-shm]
} {1 1}
do_test 1.2.2 {
code1 { sqlite3 db file:test.db?readonly_shm=1 }
list [catch { sql1 { SELECT * FROM t1 } } msg] $msg
} {0 {a b c d e f g h i j}}
do_test 1.2.3 {
code1 { db close }
file attributes test.db-shm -permissions rw-r--r--
hexio_write test.db-shm 0 01020304
file attributes test.db-shm -permissions r--r--r--
code1 { sqlite3 db file:test.db?readonly_shm=1 }
csql1 { SELECT * FROM t1 }
} {0 {a b c d e f g h i j}}
do_test 1.2.4 {
code1 { sqlite3_extended_errcode db }
} {SQLITE_OK}
do_test 1.2.5 {
file attributes test.db-shm -permissions rw-r--r--
code2 { sqlite3 db2 test.db }
sql2 "SELECT * FROM t1"
} {a b c d e f g h i j}
file attributes test.db-shm -permissions r--r--r--
do_test 1.2.6 { sql1 "SELECT * FROM t1" } {a b c d e f g h i j}
do_test 1.2.7 {
sql2 {
PRAGMA wal_checkpoint;
INSERT INTO t1 VALUES('k', 'l');
}
set {} {}
} {}
do_test 1.2.8 { sql1 "SELECT * FROM t1" } {a b c d e f g h i j k l}
# Now check that if the readonly_shm option is not supplied, or if it
# is set to zero, it is not possible to connect to the database without
# read-write access to the shm.
#
# UPDATE: os_unix.c now opens the *-shm file in readonly mode
# automatically.
#
do_test 1.3.1 {
code1 { db close }
code1 { sqlite3 db test.db }
csql1 { SELECT * FROM t1 }
} {0 {a b c d e f g h i j k l}}
# Also test that if the -shm file can be opened for read/write access,
# it is not if readonly_shm=1 is present in the URI.
do_test 1.3.2.1 {
code1 { db close }
code2 { db2 close }
file exists test.db-shm
} {0}
do_test 1.3.2.2 {
code1 { sqlite3 db file:test.db?readonly_shm=1 }
csql1 { SELECT * FROM sqlite_master }
} {1 {unable to open database file}}
do_test 1.3.2.3 {
code1 { db close }
close [open test.db-shm w]
file attributes test.db-shm -permissions r--r--r--
code1 { sqlite3 db file:test.db?readonly_shm=1 }
csql1 { SELECT * FROM t1 }
} {0 {a b c d e f g h i j k l}}
do_test 1.3.2.4 {
code1 { sqlite3_extended_errcode db }
} {SQLITE_OK}
#-----------------------------------------------------------------------
# Test cases 1.4.* check that checkpoints and log wraps don't prevent
# read-only connections from reading the database.
do_test 1.4.1 {
code1 { db close }
forcedelete test.db-shm
file exists test.db-shm
} {0}
# Open one read-only and one read-write connection. Write some data
# and then run a checkpoint using the read-write connection. Then
# check the read-only connection can still read.
do_test 1.4.2 {
code1 { sqlite3 db file:test.db?readonly_shm=1 }
code2 { sqlite3 db2 test.db }
csql2 {
INSERT INTO t1 VALUES(1, 2);
INSERT INTO t1 VALUES(3, 4);
INSERT INTO t1 VALUES(5, 6);
PRAGMA wal_checkpoint;
}
} {0 {0 3 3}}
do_test 1.4.3 {
csql1 { SELECT * FROM t1 }
} {0 {a b c d e f g h i j k l 1 2 3 4 5 6}}
# Using the read-write connection, open a transaction and write lots
# of data - causing a cache spill and a log wrap. Then check that the
# read-only connection can still read the database.
do_test 1.4.4.1 {
csql2 {
PRAGMA cache_size = 10;
BEGIN;
CREATE TABLE t2(x, y);
INSERT INTO t2 VALUES('abc', 'xyz');
INSERT INTO t2 SELECT x||y, y||x FROM t2;
INSERT INTO t2 SELECT x||y, y||x FROM t2;
INSERT INTO t2 SELECT x||y, y||x FROM t2;
INSERT INTO t2 SELECT x||y, y||x FROM t2;
INSERT INTO t2 SELECT x||y, y||x FROM t2;
INSERT INTO t2 SELECT x||y, y||x FROM t2;
INSERT INTO t2 SELECT x||y, y||x FROM t2;
INSERT INTO t2 SELECT x||y, y||x FROM t2;
INSERT INTO t2 SELECT x||y, y||x FROM t2;
}
file size test.db-wal
} [expr {[nonzero_reserved_bytes]?148848:147800}]
do_test 1.4.4.2 {
csql1 { SELECT * FROM t1 }
} {0 {a b c d e f g h i j k l 1 2 3 4 5 6}}
do_test 1.4.4.3 {
csql2 COMMIT
csql1 { SELECT count(*) FROM t2 }
} {0 512}
do_test 1.4.5 {
code2 { db2 close }
code1 { db close }
} {}
}
forcedelete test.db
#-----------------------------------------------------------------------
# Test cases 2.* check that a read-only connection may read the
# database file while a checkpoint operation is ongoing.
#
do_multiclient_test tn {
# Close all connections and delete the database.
#
code1 { db close }
code2 { db2 close }
code3 { db3 close }
forcedelete test.db
forcedelete walro
# Do not run tests with the connections in the same process.
#
if {$tn==2} continue
foreach c {code1 code2 code3} {
$c {
sqlite3_shutdown
sqlite3_config_uri 1
}
}
proc tv_hook {x file args} {
if {[file tail $file]=="test.db-wal"} {
do_test 2.1.2 {
code2 { sqlite3 db2 file:test.db?readonly_shm=1 }
csql2 { SELECT count(*) FROM t2 }
} {0 4}
do_test 2.1.3 {
code2 { db2 close }
} {}
}
}
do_test 2.1.1 {
testvfs tv -default 1 -fullshm 1
tv script tv_hook
tv filter {}
code1 { sqlite3 db test.db }
csql1 {
PRAGMA auto_vacuum = 0;
PRAGMA journal_mode = WAL;
BEGIN;
CREATE TABLE t2(x, y);
INSERT INTO t2 VALUES('abc', 'xyz');
INSERT INTO t2 SELECT x||y, y||x FROM t2;
INSERT INTO t2 SELECT x||y, y||x FROM t2;
COMMIT;
}
} {0 wal}
tv filter xSync
set res [csql1 { PRAGMA wal_checkpoint }]
do_test 2.1.4 { set res } {0 {0 2 2}}
do_test 2.1.5 {
code1 { db close }
code1 { tv delete }
} {}
}
finish_test