php-src/ext/pdo_mysql/tests/pdo_mysql_rollback.phpt
Nikita Popov 7b9519a792 Fix inconsistency in PDO transaction state
This addresses an issue introduced by #4996 and reported in
https://bugs.php.net/bug.php?id=80260.

Now that PDO::inTransaction() reports the real transaction state
of the connection, there may be a mismatch with PDOs internal
transaction state (in_tcx). This is compounded by the fact that
MySQL performs implicit commits for DDL queries.

This patch fixes the issue by making beginTransaction/commit/rollBack
work on the real transaction state provided by the driver as well
(or falling back to in_tcx if the driver does not support it).

This does mean that writing something like

    $pdo->beginTransaction();
    $pdo->exec('CREATE DATABASE ...');
    $pdo->rollBack(); // <- illegal

will now result in an error, because the CREATE DATABASE already
committed the transaction. I believe this behavior is both correct
and desired -- otherwise, there is no indication that the code did
not behave correctly and the rollBack() was effectively ignored.
However, this is also a BC break.

Closes GH-6355.
2020-10-26 17:01:18 +01:00

100 lines
2.9 KiB
PHP

--TEST--
PDO::rollBack()
--SKIPIF--
<?php
require_once(__DIR__ . DIRECTORY_SEPARATOR . 'skipif.inc');
require_once(__DIR__ . DIRECTORY_SEPARATOR . 'mysql_pdo_test.inc');
MySQLPDOTest::skip();
$db = MySQLPDOTest::factory();
if (false == MySQLPDOTest::detect_transactional_mysql_engine($db))
die("skip Transactional engine not found");
?>
--FILE--
<?php
require_once(__DIR__ . DIRECTORY_SEPARATOR . 'mysql_pdo_test.inc');
$db = MySQLPDOTest::factory();
MySQLPDOTest::createTestTable($db, MySQLPDOTest::detect_transactional_mysql_engine($db));
$db->beginTransaction();
$row = $db->query('SELECT COUNT(*) AS _num FROM test')->fetch(PDO::FETCH_ASSOC);
$num = $row['_num'];
$db->query("INSERT INTO test(id, label) VALUES (100, 'z')");
$num++;
$row = $db->query('SELECT COUNT(*) AS _num FROM test')->fetch(PDO::FETCH_ASSOC);
if ($row['_num'] != $num)
printf("[001] INSERT has failed, test will fail\n");
$db->rollBack();
$num--;
$row = $db->query('SELECT COUNT(*) AS _num FROM test')->fetch(PDO::FETCH_ASSOC);
if ($row['_num'] != $num)
printf("[002] ROLLBACK has failed\n");
$db->beginTransaction();
$db->query("INSERT INTO test(id, label) VALUES (100, 'z')");
$db->query('DROP TABLE IF EXISTS test2');
$db->query('CREATE TABLE test2(id INT)');
$num++;
try {
$db->rollBack();
$failed = false;
} catch (PDOException $e) {
$failed = true;
}
if (!$failed) {
printf("[003] Rollback should have failed\n");
}
$db->query('DROP TABLE IF EXISTS test2');
$db->query('CREATE TABLE test2(id INT) ENGINE=MyISAM');
$db->beginTransaction();
$db->query('INSERT INTO test2(id) VALUES (1)');
$db->rollBack();
$row = $db->query('SELECT COUNT(*) AS _num FROM test2')->fetch(PDO::FETCH_ASSOC);
if ($row['_num'] != 1)
printf("[003] ROLLBACK should have no effect\n");
$db->query('DROP TABLE IF EXISTS test2');
$db->setAttribute(PDO::ATTR_AUTOCOMMIT, 1);
$db->beginTransaction();
$db->query('DELETE FROM test');
$db->rollBack();
var_dump($db->getAttribute(PDO::ATTR_AUTOCOMMIT));
$db->setAttribute(PDO::ATTR_AUTOCOMMIT, 0);
$db->beginTransaction();
$db->query('DELETE FROM test');
$db->rollBack();
var_dump($db->getAttribute(PDO::ATTR_AUTOCOMMIT));
$db->setAttribute(PDO::ATTR_AUTOCOMMIT, 1);
$db->beginTransaction();
$db->query('DELETE FROM test');
$db->commit();
var_dump($db->getAttribute(PDO::ATTR_AUTOCOMMIT));
$db->setAttribute(PDO::ATTR_AUTOCOMMIT, 0);
$db->beginTransaction();
$db->query('DELETE FROM test');
$db->commit();
var_dump($db->getAttribute(PDO::ATTR_AUTOCOMMIT));
print "done!";
?>
--CLEAN--
<?php
require __DIR__ . '/mysql_pdo_test.inc';
$db = MySQLPDOTest::factory();
$db->exec('DROP TABLE IF EXISTS test');
$db->exec('DROP TABLE IF EXISTS test2');
?>
--EXPECT--
int(1)
int(0)
int(1)
int(0)
done!