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# 2011 November 16
#
# 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 test cases for sqlite3_db_cacheflush API.
#
set testdir [file dirname $argv0]
source $testdir/tester.tcl
set testprefix cacheflush
test_set_config_pagecache 0 0
# Run the supplied SQL on a copy of the database currently stored on
# disk in file $dbfile.
proc diskquery {dbfile sql} {
forcecopy $dbfile dq.db
sqlite3 dq dq.db
set res [execsql $sql dq]
dq close
set res
}
# Simplest possible test.
#
do_execsql_test 1.1.0 {
CREATE TABLE t1(a, b);
INSERT INTO t1 VALUES(1, 2);
BEGIN;
INSERT INTO t1 VALUES(3, 4);
}
do_test 1.1.1 {
diskquery test.db { SELECT * FROM t1 }
} {1 2}
do_test 1.1.2 {
sqlite3_db_cacheflush db
diskquery test.db { SELECT * FROM t1 }
} {1 2 3 4}
# Test that multiple pages may be flushed to disk.
#
do_execsql_test 1.2.0 {
COMMIT;
CREATE TABLE t2(a, b);
BEGIN;
INSERT INTO t1 VALUES(5, 6);
INSERT INTO t2 VALUES('a', 'b');
}
do_test 1.2.1 {
diskquery test.db {
SELECT * FROM t1;
SELECT * FROM t2;
}
} {1 2 3 4}
do_test 1.2.2 {
sqlite3_db_cacheflush db
diskquery test.db {
SELECT * FROM t1;
SELECT * FROM t2;
}
} {1 2 3 4 5 6 a b}
# Test that pages with nRef!=0 are not flushed to disk.
#
do_execsql_test 1.3.0 {
COMMIT;
CREATE TABLE t3(a, b);
BEGIN;
INSERT INTO t1 VALUES(7, 8);
INSERT INTO t2 VALUES('c', 'd');
INSERT INTO t3 VALUES('i', 'ii');
}
do_test 1.3.1 {
diskquery test.db {
SELECT * FROM t1;
SELECT * FROM t2;
SELECT * FROM t3;
}
} {1 2 3 4 5 6 a b}
do_test 1.3.2 {
db eval { SELECT a FROM t1 } {
if {$a==3} {
sqlite3_db_cacheflush db
}
}
diskquery test.db {
SELECT * FROM t1;
SELECT * FROM t2;
SELECT * FROM t3;
}
} {1 2 3 4 5 6 a b c d i ii}
do_test 1.3.2 {
sqlite3_db_cacheflush db
diskquery test.db {
SELECT * FROM t1;
SELECT * FROM t2;
SELECT * FROM t3;
}
} {1 2 3 4 5 6 7 8 a b c d i ii}
# Check that SQLITE_BUSY is returned if pages cannot be flushed due to
# conflicting read locks.
#
do_execsql_test 1.4.0 {
COMMIT;
BEGIN;
INSERT INTO t1 VALUES(9, 10);
}
do_test 1.4.1 {
sqlite3 db2 test.db
db2 eval {
BEGIN;
SELECT * FROM t1;
}
diskquery test.db {
SELECT * FROM t1;
}
} {1 2 3 4 5 6 7 8}
do_test 1.4.2 {
list [catch { sqlite3_db_cacheflush db } msg] $msg
} {1 {database is locked}}
do_test 1.4.3 {
diskquery test.db {
SELECT * FROM t1;
}
} {1 2 3 4 5 6 7 8}
do_test 1.4.4 {
db2 close
sqlite3_db_cacheflush db
diskquery test.db {
SELECT * FROM t1;
}
} {1 2 3 4 5 6 7 8 9 10}
do_execsql_test 1.4.5 { COMMIT }
#-------------------------------------------------------------------------
# Test that ATTACHed database caches are also flushed.
#
forcedelete test.db2
do_execsql_test 2.1.0 {
ATTACH 'test.db2' AS aux;
CREATE TABLE aux.t4(x, y);
INSERT INTO t4 VALUES('A', 'B');
BEGIN;
INSERT INTO t1 VALUES(11, 12);
INSERT INTO t4 VALUES('C', 'D');
}
do_test 2.1.1 {
diskquery test.db { SELECT * FROM t1; }
} {1 2 3 4 5 6 7 8 9 10}
do_test 2.1.2 {
diskquery test.db2 { SELECT * FROM t4; }
} {A B}
do_test 2.1.3 {
sqlite3_db_cacheflush db
diskquery test.db { SELECT * FROM t1; }
} {1 2 3 4 5 6 7 8 9 10 11 12}
do_test 2.1.4 {
sqlite3_db_cacheflush db
diskquery test.db2 { SELECT * FROM t4; }
} {A B C D}
do_execsql_test 2.1.5 { COMMIT }
# And that hitting an SQLITE_BUSY when flushing "main" does not stop
# SQLite from going on to flush "aux".
#
do_execsql_test 2.2.0 {
BEGIN;
INSERT INTO t1 VALUES(13, 14);
INSERT INTO t4 VALUES('E', 'F');
}
do_test 2.2.1 {
diskquery test.db { SELECT * FROM t1; }
} {1 2 3 4 5 6 7 8 9 10 11 12}
do_test 2.2.2 {
diskquery test.db2 { SELECT * FROM t4; }
} {A B C D}
do_test 2.2.3 {
sqlite3 db2 test.db
execsql {
BEGIN;
SELECT * FROM t1;
} db2
list [catch { sqlite3_db_cacheflush db } msg] $msg
} {1 {database is locked}}
do_test 2.2.4 {
diskquery test.db { SELECT * FROM t1; }
} {1 2 3 4 5 6 7 8 9 10 11 12}
do_test 2.2.5 {
diskquery test.db2 { SELECT * FROM t4; }
} {A B C D E F}
do_test 2.2.6 {
db2 close
sqlite3_db_cacheflush db
diskquery test.db { SELECT * FROM t1; }
} {1 2 3 4 5 6 7 8 9 10 11 12 13 14}
do_execsql_test 2.2.7 { COMMIT }
#-------------------------------------------------------------------------
# Test that nothing terrible happens if sqlite3_db_cacheflush() is
# called on an in-memory database.
#
do_test 3.0 {
db close
sqlite3 db :memory:
db eval {
CREATE TABLE t1(x PRIMARY KEY);
CREATE TABLE t2(y PRIMARY KEY);
BEGIN;
INSERT INTO t1 VALUES(randomblob(100));
INSERT INTO t2 VALUES(randomblob(100));
INSERT INTO t1 VALUES(randomblob(100));
INSERT INTO t2 VALUES(randomblob(100));
}
sqlite3_db_cacheflush db
} {}
do_execsql_test 3.1 { PRAGMA integrity_check } ok
do_execsql_test 3.2 { COMMIT }
do_execsql_test 3.3 { PRAGMA integrity_check } ok
do_execsql_test 3.4 {
SELECT count(*) FROM t1;
SELECT count(*) FROM t2;
} {2 2}
#-------------------------------------------------------------------------
# Test that calling sqlite3_db_cacheflush() does not interfere with
# savepoint transactions.
#
do_test 4.0 {
reset_db
execsql {
CREATE TABLE ta(a, aa);
CREATE TABLE tb(b, bb);
INSERT INTO ta VALUES('a', randomblob(500));
INSERT INTO tb VALUES('b', randomblob(500));
BEGIN;
UPDATE ta SET a = 'A';
SAVEPOINT one;
UPDATE tb SET b = 'B';
}
sqlite3_db_cacheflush db
diskquery test.db {
SELECT a FROM ta;
SELECT b FROM tb;
}
} {A B}
do_test 4.1 {
execsql {
ROLLBACK TO one;
}
sqlite3_db_cacheflush db
diskquery test.db {
SELECT a FROM ta;
SELECT b FROM tb;
}
} {A b}
do_test 4.2 {
execsql {
INSERT INTO tb VALUES('c', randomblob(10));
INSERT INTO tb VALUES('d', randomblob(10));
INSERT INTO tb VALUES('e', randomblob(10));
}
sqlite3_db_cacheflush db
diskquery test.db {
SELECT a FROM ta;
SELECT b FROM tb;
}
} {A b c d e}
do_test 4.3 {
execsql {
SAVEPOINT two;
UPDATE tb SET b = upper(b);
}
sqlite3_db_cacheflush db
diskquery test.db {
SELECT a FROM ta;
SELECT b FROM tb;
}
} {A B C D E}
do_test 4.4 {
execsql {
ROLLBACK TO two;
}
sqlite3_db_cacheflush db
diskquery test.db {
SELECT a FROM ta;
SELECT b FROM tb;
}
} {A b c d e}
do_test 4.4 {
execsql {
ROLLBACK TO one;
}
sqlite3_db_cacheflush db
diskquery test.db {
SELECT a FROM ta;
SELECT b FROM tb;
}
} {A b}
do_test 4.5 {
execsql {
ROLLBACK;
SELECT a FROM ta;
SELECT b FROM tb;
}
} {a b}
test_restore_config_pagecache
finish_test
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