f12ba66cf8
read-only and proceed as if the readonly_shm=1 URI option were specified. FossilOrigin-Name: ba718754fa5ab8596cb84b751051de98afa2706fe6c5df39ad6d925d790719ee
301 lines
8.0 KiB
Plaintext
301 lines
8.0 KiB
Plaintext
# 2011 May 09
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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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# This file contains tests for using WAL databases in read-only mode.
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#
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set testdir [file dirname $argv0]
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source $testdir/tester.tcl
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source $testdir/lock_common.tcl
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set ::testprefix walro
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# These tests are only going to work on unix.
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#
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if {$::tcl_platform(platform) != "unix"} {
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finish_test
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return
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}
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# And only if the build is WAL-capable.
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#
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ifcapable !wal {
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finish_test
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return
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}
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do_multiclient_test tn {
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# Close all connections and delete the database.
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#
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code1 { db close }
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code2 { db2 close }
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code3 { db3 close }
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forcedelete test.db
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forcedelete walro
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# Do not run tests with the connections in the same process.
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#
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if {$tn==2} continue
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foreach c {code1 code2 code3} {
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$c {
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sqlite3_shutdown
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sqlite3_config_uri 1
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}
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}
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file mkdir walro
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do_test 1.1.1 {
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code2 { sqlite3 db2 test.db }
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sql2 {
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PRAGMA auto_vacuum = 0;
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PRAGMA journal_mode = WAL;
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CREATE TABLE t1(x, y);
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INSERT INTO t1 VALUES('a', 'b');
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}
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file exists test.db-shm
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} {1}
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do_test 1.1.2 {
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file attributes test.db-shm -permissions r--r--r--
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code1 { sqlite3 db file:test.db?readonly_shm=1 }
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} {}
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do_test 1.1.3 { sql1 "SELECT * FROM t1" } {a b}
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do_test 1.1.4 { sql2 "INSERT INTO t1 VALUES('c', 'd')" } {}
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do_test 1.1.5 { sql1 "SELECT * FROM t1" } {a b c d}
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# Check that the read-only connection cannot write or checkpoint the db.
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#
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do_test 1.1.6 {
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csql1 "INSERT INTO t1 VALUES('e', 'f')"
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} {1 {attempt to write a readonly database}}
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do_test 1.1.7 {
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csql1 "PRAGMA wal_checkpoint"
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} {1 {attempt to write a readonly database}}
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do_test 1.1.9 { sql2 "INSERT INTO t1 VALUES('e', 'f')" } {}
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do_test 1.1.10 { sql1 "SELECT * FROM t1" } {a b c d e f}
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do_test 1.1.11 {
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sql2 {
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INSERT INTO t1 VALUES('g', 'h');
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PRAGMA wal_checkpoint;
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}
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set {} {}
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} {}
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do_test 1.1.12 { sql1 "SELECT * FROM t1" } {a b c d e f g h}
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do_test 1.1.13 { sql2 "INSERT INTO t1 VALUES('i', 'j')" } {}
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do_test 1.2.1 {
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code2 { db2 close }
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code1 { db close }
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list [file exists test.db-wal] [file exists test.db-shm]
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} {1 1}
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do_test 1.2.2 {
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code1 { sqlite3 db file:test.db?readonly_shm=1 }
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list [catch { sql1 { SELECT * FROM t1 } } msg] $msg
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} {0 {a b c d e f g h i j}}
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do_test 1.2.3 {
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code1 { db close }
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file attributes test.db-shm -permissions rw-r--r--
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hexio_write test.db-shm 0 01020304
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file attributes test.db-shm -permissions r--r--r--
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code1 { sqlite3 db file:test.db?readonly_shm=1 }
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csql1 { SELECT * FROM t1 }
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} {0 {a b c d e f g h i j}}
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do_test 1.2.4 {
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code1 { sqlite3_extended_errcode db }
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} {SQLITE_OK}
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do_test 1.2.5 {
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file attributes test.db-shm -permissions rw-r--r--
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code2 { sqlite3 db2 test.db }
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sql2 "SELECT * FROM t1"
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} {a b c d e f g h i j}
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file attributes test.db-shm -permissions r--r--r--
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do_test 1.2.6 { sql1 "SELECT * FROM t1" } {a b c d e f g h i j}
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do_test 1.2.7 {
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sql2 {
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PRAGMA wal_checkpoint;
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INSERT INTO t1 VALUES('k', 'l');
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}
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set {} {}
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} {}
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do_test 1.2.8 { sql1 "SELECT * FROM t1" } {a b c d e f g h i j k l}
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# Now check that if the readonly_shm option is not supplied, or if it
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# is set to zero, it is not possible to connect to the database without
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# read-write access to the shm.
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#
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# UPDATE: os_unix.c now opens the *-shm file in readonly mode
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# automatically.
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#
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do_test 1.3.1 {
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code1 { db close }
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code1 { sqlite3 db test.db }
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csql1 { SELECT * FROM t1 }
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} {0 {a b c d e f g h i j k l}}
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# Also test that if the -shm file can be opened for read/write access,
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# it is not if readonly_shm=1 is present in the URI.
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do_test 1.3.2.1 {
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code1 { db close }
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code2 { db2 close }
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file exists test.db-shm
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} {0}
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do_test 1.3.2.2 {
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code1 { sqlite3 db file:test.db?readonly_shm=1 }
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csql1 { SELECT * FROM sqlite_master }
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} {1 {unable to open database file}}
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do_test 1.3.2.3 {
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code1 { db close }
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close [open test.db-shm w]
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file attributes test.db-shm -permissions r--r--r--
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code1 { sqlite3 db file:test.db?readonly_shm=1 }
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csql1 { SELECT * FROM t1 }
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} {0 {a b c d e f g h i j k l}}
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do_test 1.3.2.4 {
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code1 { sqlite3_extended_errcode db }
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} {SQLITE_OK}
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#-----------------------------------------------------------------------
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# Test cases 1.4.* check that checkpoints and log wraps don't prevent
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# read-only connections from reading the database.
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do_test 1.4.1 {
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code1 { db close }
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forcedelete test.db-shm
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file exists test.db-shm
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} {0}
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# Open one read-only and one read-write connection. Write some data
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# and then run a checkpoint using the read-write connection. Then
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# check the read-only connection can still read.
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do_test 1.4.2 {
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code1 { sqlite3 db file:test.db?readonly_shm=1 }
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code2 { sqlite3 db2 test.db }
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csql2 {
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INSERT INTO t1 VALUES(1, 2);
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INSERT INTO t1 VALUES(3, 4);
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INSERT INTO t1 VALUES(5, 6);
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PRAGMA wal_checkpoint;
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}
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} {0 {0 3 3}}
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do_test 1.4.3 {
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csql1 { SELECT * FROM t1 }
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} {0 {a b c d e f g h i j k l 1 2 3 4 5 6}}
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# Using the read-write connection, open a transaction and write lots
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# of data - causing a cache spill and a log wrap. Then check that the
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# read-only connection can still read the database.
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do_test 1.4.4.1 {
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csql2 {
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PRAGMA cache_size = 10;
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BEGIN;
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CREATE TABLE t2(x, y);
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INSERT INTO t2 VALUES('abc', 'xyz');
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INSERT INTO t2 SELECT x||y, y||x FROM t2;
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INSERT INTO t2 SELECT x||y, y||x FROM t2;
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INSERT INTO t2 SELECT x||y, y||x FROM t2;
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INSERT INTO t2 SELECT x||y, y||x FROM t2;
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INSERT INTO t2 SELECT x||y, y||x FROM t2;
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INSERT INTO t2 SELECT x||y, y||x FROM t2;
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INSERT INTO t2 SELECT x||y, y||x FROM t2;
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INSERT INTO t2 SELECT x||y, y||x FROM t2;
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INSERT INTO t2 SELECT x||y, y||x FROM t2;
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}
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file size test.db-wal
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} [expr {[nonzero_reserved_bytes]?148848:147800}]
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do_test 1.4.4.2 {
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csql1 { SELECT * FROM t1 }
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} {0 {a b c d e f g h i j k l 1 2 3 4 5 6}}
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do_test 1.4.4.3 {
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csql2 COMMIT
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csql1 { SELECT count(*) FROM t2 }
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} {0 512}
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do_test 1.4.5 {
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code2 { db2 close }
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code1 { db close }
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} {}
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}
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forcedelete test.db
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#-----------------------------------------------------------------------
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# Test cases 2.* check that a read-only connection may read the
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# database file while a checkpoint operation is ongoing.
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#
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do_multiclient_test tn {
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# Close all connections and delete the database.
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#
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code1 { db close }
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code2 { db2 close }
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code3 { db3 close }
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forcedelete test.db
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forcedelete walro
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# Do not run tests with the connections in the same process.
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#
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if {$tn==2} continue
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foreach c {code1 code2 code3} {
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$c {
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sqlite3_shutdown
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sqlite3_config_uri 1
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}
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}
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proc tv_hook {x file args} {
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if {[file tail $file]=="test.db-wal"} {
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do_test 2.1.2 {
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code2 { sqlite3 db2 file:test.db?readonly_shm=1 }
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csql2 { SELECT count(*) FROM t2 }
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} {0 4}
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do_test 2.1.3 {
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code2 { db2 close }
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} {}
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}
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}
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do_test 2.1.1 {
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testvfs tv -default 1 -fullshm 1
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tv script tv_hook
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tv filter {}
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code1 { sqlite3 db test.db }
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csql1 {
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PRAGMA auto_vacuum = 0;
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PRAGMA journal_mode = WAL;
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BEGIN;
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CREATE TABLE t2(x, y);
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INSERT INTO t2 VALUES('abc', 'xyz');
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INSERT INTO t2 SELECT x||y, y||x FROM t2;
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INSERT INTO t2 SELECT x||y, y||x FROM t2;
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COMMIT;
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}
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} {0 wal}
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tv filter xSync
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set res [csql1 { PRAGMA wal_checkpoint }]
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do_test 2.1.4 { set res } {0 {0 2 2}}
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do_test 2.1.5 {
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code1 { db close }
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code1 { tv delete }
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} {}
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}
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finish_test
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