Classes/Compatibility/TYPO3v87/Service/CacheLowLevelCleaner.php
public function forceFlushDatabaseCacheTables()
    {
        // Get all table names from Default connection starting with 'cf_' and truncate them
        $connectionPool = GeneralUtility::makeInstance(ConnectionPool::class);
        $connection = $connectionPool->getConnectionByName('Default');
        $tableNames = $connection->getSchemaManager()->listTableNames();
        foreach ($tableNames as $tableName) {
            if ($tableName === 'cache_treelist' || strpos($tableName, 'cf_') === 0) {
                $connection->truncate($tableName);
            }
        }
        // Check tables on other connections
        $remappedTables = isset($GLOBALS['TYPO3_CONF_VARS']['DB']['TableMapping'])
            ? array_keys((array)$GLOBALS['TYPO3_CONF_VARS']['DB']['TableMapping'])
            : [];
        foreach ($remappedTables as $tableName) {
            if ($tableName === 'cache_treelist' || strpos($tableName, 'cf_') === 0) {
                $connectionPool->getConnectionForTable($tableName)->truncate($tableName);
            }
        }
    }
public function forceFlushDatabaseCacheTables()
    {
        // Get all table names from Default connection starting with 'cf_' and truncate them
        $connectionPool = GeneralUtility::makeInstance(ConnectionPool::class);
        $connection = $connectionPool->getConnectionByName('Default');
        $tableNames = $connection->getSchemaManager()->listTableNames();
        foreach ($tableNames as $tableName) {
            if ($tableName === 'cache_treelist' || strpos($tableName, 'cf_') === 0) {
                $connection->truncate($tableName);
            }
        }
        // Check tables on other connections
        $remappedTables = isset($GLOBALS['TYPO3_CONF_VARS']['DB']['TableMapping'])
            ? array_keys((array)$GLOBALS['TYPO3_CONF_VARS']['DB']['TableMapping'])
            : [];
        foreach ($remappedTables as $tableName) {
            if ($tableName === 'cache_treelist' || strpos($tableName, 'cf_') === 0) {
                $connectionPool->getConnectionForTable($tableName)->truncate($tableName);
            }
        }
    }
Truncate all DB tables prefixed with 'cf_'