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<?php
/**
* SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
* SPDX-FileCopyrightText: 2016 ownCloud, Inc.
* SPDX-License-Identifier: AGPL-3.0-only
*/
namespace OC\Repair;
use Doctrine\DBAL\Exception\DriverException;
use OCP\IConfig;
use OCP\IDBConnection;
use OCP\Migration\IOutput;
use OCP\Migration\IRepairStep;
use Psr\Log\LoggerInterface;
class Collation implements IRepairStep {
/** @var IConfig */
protected $config;
protected LoggerInterface $logger;
/** @var IDBConnection */
protected $connection;
/** @var bool */
protected $ignoreFailures;
/**
* @param bool $ignoreFailures
*/
public function __construct(
IConfig $config,
LoggerInterface $logger,
IDBConnection $connection,
$ignoreFailures
) {
$this->connection = $connection;
$this->config = $config;
$this->logger = $logger;
$this->ignoreFailures = $ignoreFailures;
}
public function getName() {
return 'Repair MySQL collation';
}
/**
* Fix mime types
*/
public function run(IOutput $output) {
if ($this->connection->getDatabaseProvider() !== IDBConnection::PLATFORM_MYSQL) {
$output->info('Not a mysql database -> nothing to do');
return;
}
$characterSet = $this->config->getSystemValueBool('mysql.utf8mb4', false) ? 'utf8mb4' : 'utf8';
$tables = $this->getAllNonUTF8BinTables($this->connection);
foreach ($tables as $table) {
$output->info("Change row format for $table ...");
$query = $this->connection->prepare('ALTER TABLE `' . $table . '` ROW_FORMAT = DYNAMIC;');
try {
$query->execute();
} catch (DriverException $e) {
// Just log this
$this->logger->error($e->getMessage(), ['exception' => $e]);
if (!$this->ignoreFailures) {
throw $e;
}
}
$output->info("Change collation for $table ...");
$query = $this->connection->prepare('ALTER TABLE `' . $table . '` CONVERT TO CHARACTER SET ' . $characterSet . ' COLLATE ' . $characterSet . '_bin;');
try {
$query->execute();
} catch (DriverException $e) {
// Just log this
$this->logger->error($e->getMessage(), ['exception' => $e]);
if (!$this->ignoreFailures) {
throw $e;
}
}
}
if (empty($tables)) {
$output->info('All tables already have the correct collation -> nothing to do');
}
}
/**
* @param IDBConnection $connection
* @return string[]
*/
protected function getAllNonUTF8BinTables(IDBConnection $connection) {
$dbName = $this->config->getSystemValueString('dbname');
$characterSet = $this->config->getSystemValueBool('mysql.utf8mb4', false) ? 'utf8mb4' : 'utf8';
// fetch tables by columns
$statement = $connection->executeQuery(
'SELECT DISTINCT(TABLE_NAME) AS `table`' .
' FROM INFORMATION_SCHEMA . COLUMNS' .
' WHERE TABLE_SCHEMA = ?' .
" AND (COLLATION_NAME <> '" . $characterSet . "_bin' OR CHARACTER_SET_NAME <> '" . $characterSet . "')" .
" AND TABLE_NAME LIKE '*PREFIX*%'",
[$dbName]
);
$rows = $statement->fetchAll();
$result = [];
foreach ($rows as $row) {
$result[$row['table']] = true;
}
// fetch tables by collation
$statement = $connection->executeQuery(
'SELECT DISTINCT(TABLE_NAME) AS `table`' .
' FROM INFORMATION_SCHEMA . TABLES' .
' WHERE TABLE_SCHEMA = ?' .
" AND TABLE_COLLATION <> '" . $characterSet . "_bin'" .
" AND TABLE_NAME LIKE '*PREFIX*%'",
[$dbName]
);
$rows = $statement->fetchAll();
foreach ($rows as $row) {
$result[$row['table']] = true;
}
return array_keys($result);
}
}
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