_listTables example

    public function listTables(bool $constrainByPrefix = false)
    {
        if (isset($this->dataCache['table_names']) && $this->dataCache['table_names']) {
            return $constrainByPrefix
                ? preg_grep("/^{$this->DBPrefix}/", $this->dataCache['table_names'])
                : $this->dataCache['table_names'];
        }

        $sql = $this->_listTables($constrainByPrefix);

        if ($sql === false) {
            if ($this->DBDebug) {
                throw new DatabaseException('This feature is not available for the database you are using.');
            }

            return false;
        }

        $this->dataCache['table_names'] = [];