Merge pull request #50563 from nextcloud/backport/50530/stable29

Author: provokateurin

core/Command/Db/ConvertType.php

@@ -177,13 +177,6 @@ protected function readPassword(InputInterface $input, OutputInterface $output)
 	}
 
 	protected function execute(InputInterface $input, OutputInterface $output): int {
-		// WARNING:
-		// Leave in place until #45257 is addressed to prevent data loss (hopefully in time for the next maintenance release)
-		//
-		throw new \InvalidArgumentException(
-			'This command is temporarily disabled (until the next maintenance release).'
-		);
-
 		$this->validateInput($input, $output);
 		$this->readPassword($input, $output);
 
@@ -251,7 +244,7 @@ protected function createSchema(Connection $fromDB, Connection $toDB, InputInter
 
 	protected function getToDBConnection(InputInterface $input, OutputInterface $output) {
 		$type = $input->getArgument('type');
-		$connectionParams = $this->connectionFactory->createConnectionParams();
+		$connectionParams = $this->connectionFactory->createConnectionParams(type: $type);
 		$connectionParams = array_merge($connectionParams, [
 			'host' => $input->getArgument('hostname'),
 			'user' => $input->getArgument('username'),

lib/private/DB/ConnectionFactory.php

@@ -120,7 +120,7 @@ public function getConnection(string $type, array $additionalConnectionParams):
 		$normalizedType = $this->normalizeType($type);
 		$eventManager = new EventManager();
 		$eventManager->addEventSubscriber(new SetTransactionIsolationLevel());
-		$connectionParams = $this->createConnectionParams('', $additionalConnectionParams);
+		$connectionParams = $this->createConnectionParams('', $additionalConnectionParams, $type);
 		switch ($normalizedType) {
 			case 'pgsql':
 				// pg_connect used by Doctrine DBAL does not support URI notation (enclosed in brackets)
@@ -187,12 +187,10 @@ public function isValidType($type) {
 
 	/**
 	 * Create the connection parameters for the config
-	 *
-	 * @param string $configPrefix
-	 * @return array
 	 */
-	public function createConnectionParams(string $configPrefix = '', array $additionalConnectionParams = []) {
-		$type = $this->config->getValue('dbtype', 'sqlite');
+	public function createConnectionParams(string $configPrefix = '', array $additionalConnectionParams = [], ?string $type = null) {
+		// use provided type or if null use type from config
+		$type = $type ?? $this->config->getValue('dbtype', 'sqlite');
 
 		$connectionParams = array_merge($this->getDefaultConnectionParams($type), [
 			'user' => $this->config->getValue($configPrefix . 'dbuser', $this->config->getValue('dbuser', '')),
@@ -224,7 +222,7 @@ public function createConnectionParams(string $configPrefix = '', array $additio
 			'tablePrefix' => $connectionParams['tablePrefix']
 		];
 
-		if ($this->config->getValue('mysql.utf8mb4', false)) {
+		if ($type === 'mysql' && $this->config->getValue('mysql.utf8mb4', false)) {
 			$connectionParams['defaultTableOptions'] = [
 				'collate' => 'utf8mb4_bin',
 				'charset' => 'utf8mb4',