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Add experimental API sqlite3_db_cacheflush().
FossilOrigin-Name: 65b86dc1fa4a57cc3cde86a820d9f848aa288a15
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dan
207
test/cacheflush.test
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207
test/cacheflush.test
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# 2011 November 16
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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 test cases for sqlite3_db_cacheflush API.
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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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set testprefix cacheflush
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test_set_config_pagecache 0 0
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# Run the supplied SQL on a copy of the database currently stored on
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# disk in file $dbfile.
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proc diskquery {dbfile sql} {
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forcecopy $dbfile dq.db
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sqlite3 dq dq.db
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set res [execsql $sql dq]
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dq close
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set res
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}
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# Simplest possible test.
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#
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do_execsql_test 1.1.0 {
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CREATE TABLE t1(a, b);
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INSERT INTO t1 VALUES(1, 2);
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BEGIN;
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INSERT INTO t1 VALUES(3, 4);
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}
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do_test 1.1.1 {
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diskquery test.db { SELECT * FROM t1 }
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} {1 2}
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do_test 1.1.2 {
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sqlite3_db_cacheflush db
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diskquery test.db { SELECT * FROM t1 }
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} {1 2 3 4}
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# Test that multiple pages may be flushed to disk.
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#
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do_execsql_test 1.2.0 {
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COMMIT;
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CREATE TABLE t2(a, b);
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BEGIN;
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INSERT INTO t1 VALUES(5, 6);
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INSERT INTO t2 VALUES('a', 'b');
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}
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do_test 1.2.1 {
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diskquery test.db {
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SELECT * FROM t1;
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SELECT * FROM t2;
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}
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} {1 2 3 4}
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do_test 1.2.2 {
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sqlite3_db_cacheflush db
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diskquery test.db {
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SELECT * FROM t1;
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SELECT * FROM t2;
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}
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} {1 2 3 4 5 6 a b}
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# Test that pages with nRef!=0 are not flushed to disk.
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#
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do_execsql_test 1.3.0 {
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COMMIT;
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CREATE TABLE t3(a, b);
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BEGIN;
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INSERT INTO t1 VALUES(7, 8);
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INSERT INTO t2 VALUES('c', 'd');
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INSERT INTO t3 VALUES('i', 'ii');
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}
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do_test 1.3.1 {
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diskquery test.db {
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SELECT * FROM t1;
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SELECT * FROM t2;
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SELECT * FROM t3;
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}
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} {1 2 3 4 5 6 a b}
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do_test 1.3.2 {
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db eval { SELECT a FROM t1 } {
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if {$a==3} {
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sqlite3_db_cacheflush db
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}
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}
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diskquery test.db {
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SELECT * FROM t1;
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SELECT * FROM t2;
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SELECT * FROM t3;
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}
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} {1 2 3 4 5 6 a b c d i ii}
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do_test 1.3.2 {
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sqlite3_db_cacheflush db
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diskquery test.db {
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SELECT * FROM t1;
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SELECT * FROM t2;
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SELECT * FROM t3;
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}
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} {1 2 3 4 5 6 7 8 a b c d i ii}
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# Check that SQLITE_BUSY is returned if pages cannot be flushed due to
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# conflicting read locks.
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#
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do_execsql_test 1.4.0 {
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COMMIT;
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BEGIN;
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INSERT INTO t1 VALUES(9, 10);
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}
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do_test 1.4.1 {
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sqlite3 db2 test.db
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db2 eval {
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BEGIN;
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SELECT * FROM t1;
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}
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diskquery test.db {
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SELECT * FROM t1;
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}
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} {1 2 3 4 5 6 7 8}
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do_test 1.4.2 {
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list [catch { sqlite3_db_cacheflush db } msg] $msg
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} {1 {database is locked}}
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do_test 1.4.3 {
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diskquery test.db {
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SELECT * FROM t1;
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}
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} {1 2 3 4 5 6 7 8}
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do_test 1.4.4 {
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db2 close
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sqlite3_db_cacheflush db
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diskquery test.db {
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SELECT * FROM t1;
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}
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} {1 2 3 4 5 6 7 8 9 10}
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do_execsql_test 1.4.5 { COMMIT }
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#-------------------------------------------------------------------------
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# Test that ATTACHed database caches are also flushed.
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#
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forcedelete test.db2
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do_execsql_test 2.1.0 {
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ATTACH 'test.db2' AS aux;
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CREATE TABLE aux.t4(x, y);
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INSERT INTO t4 VALUES('A', 'B');
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BEGIN;
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INSERT INTO t1 VALUES(11, 12);
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INSERT INTO t4 VALUES('C', 'D');
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}
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do_test 2.1.1 {
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diskquery test.db { SELECT * FROM t1; }
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} {1 2 3 4 5 6 7 8 9 10}
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do_test 2.1.2 {
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diskquery test.db2 { SELECT * FROM t4; }
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} {A B}
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do_test 2.1.3 {
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sqlite3_db_cacheflush db
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diskquery test.db { SELECT * FROM t1; }
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} {1 2 3 4 5 6 7 8 9 10 11 12}
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do_test 2.1.4 {
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sqlite3_db_cacheflush db
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diskquery test.db2 { SELECT * FROM t4; }
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} {A B C D}
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do_execsql_test 2.1.5 { COMMIT }
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# And that hitting an SQLITE_BUSY when flushing "main" does not stop
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# SQLite from going on to flush "aux".
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#
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do_execsql_test 2.2.0 {
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BEGIN;
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INSERT INTO t1 VALUES(13, 14);
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INSERT INTO t4 VALUES('E', 'F');
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}
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do_test 2.2.1 {
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diskquery test.db { SELECT * FROM t1; }
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} {1 2 3 4 5 6 7 8 9 10 11 12}
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do_test 2.2.2 {
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diskquery test.db2 { SELECT * FROM t4; }
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} {A B C D}
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do_test 2.2.3 {
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sqlite3 db2 test.db
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execsql {
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BEGIN;
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SELECT * FROM t1;
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} db2
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list [catch { sqlite3_db_cacheflush db } msg] $msg
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} {1 {database is locked}}
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do_test 2.2.4 {
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diskquery test.db { SELECT * FROM t1; }
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} {1 2 3 4 5 6 7 8 9 10 11 12}
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do_test 2.2.5 {
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diskquery test.db2 { SELECT * FROM t4; }
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} {A B C D E F}
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do_test 2.2.6 {
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db2 close
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sqlite3_db_cacheflush db
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diskquery test.db { SELECT * FROM t1; }
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} {1 2 3 4 5 6 7 8 9 10 11 12 13 14}
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do_execsql_test 2.2.7 { COMMIT }
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test_restore_config_pagecache
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finish_test
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