/**
* Handles request for ROLLBACK.
*
* @param string $sql_query SQL query(s)
*
* @return void
*/
function PMA_handleRollbackRequest($sql_query)
{
$sql_delimiter = $_REQUEST['sql_delimiter'];
$queries = explode($sql_delimiter, $sql_query);
$error = false;
$error_msg = __('Only INSERT, UPDATE, DELETE and REPLACE ' . 'SQL queries containing transactional engine tables can be rolled back.');
foreach ($queries as $sql_query) {
if (empty($sql_query)) {
continue;
}
// Check each query for ROLLBACK support.
if (!PMA_checkIfRollbackPossible($sql_query)) {
$global_error = $GLOBALS['dbi']->getError();
if ($global_error) {
$error = $global_error;
} else {
$error = $error_msg;
}
break;
}
}
if ($error) {
unset($_REQUEST['rollback_query']);
$response = PMA_Response::getInstance();
$message = PMA_Message::rawError($error);
$response->addJSON('message', $message);
exit;
} else {
// If everything fine, START a transaction.
$GLOBALS['dbi']->query('START TRANSACTION');
}
}
/**
* Test for PMA_checkIfRollbackPossible
*
* @return void
*/
function testPMACheckIfRollbackPossible()
{
$GLOBALS['db'] = 'PMA';
//mock DBI
$dbi = $this->getMockBuilder('PMA\\libraries\\DatabaseInterface')->disableOriginalConstructor()->getMock();
// List of Transactional Engines.
$transactional_engines = array('INNODB', 'FALCON', 'NDB', 'INFINIDB', 'TOKUDB', 'XTRADB', 'SEQUENCE', 'BDB');
$check_query = 'SELECT `ENGINE` FROM `information_schema`.`tables` ' . 'WHERE `table_name` = "%s" ' . 'AND `table_schema` = "%s" ' . 'AND UPPER(`engine`) IN ("' . implode('", "', $transactional_engines) . '")';
$check_table_query = 'SELECT * FROM `%s`.`%s` ' . 'LIMIT 1';
$dbi->expects($this->at(0))->method('tryQuery')->with(sprintf($check_table_query, 'PMA', 'table_1'))->will($this->returnValue(array('table')));
$dbi->expects($this->at(1))->method('tryQuery')->with(sprintf($check_query, 'table_1', 'PMA'))->will($this->returnValue(true));
$dbi->expects($this->at(2))->method('numRows')->will($this->returnValue(1));
$dbi->expects($this->at(3))->method('tryQuery')->with(sprintf($check_table_query, 'PMA', 'table_2'))->will($this->returnValue(array('table')));
$dbi->expects($this->at(4))->method('tryQuery')->with(sprintf($check_query, 'table_2', 'PMA'))->will($this->returnValue(true));
$dbi->expects($this->at(5))->method('numRows')->will($this->returnValue(1));
$GLOBALS['dbi'] = $dbi;
$sql_query = 'UPDATE `table_1` AS t1, `table_2` t2 ' . 'SET `table_1`.`id` = `table_2`.`id` ' . 'WHERE 1';
$this->assertEquals(true, PMA_checkIfRollbackPossible($sql_query));
}