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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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