RawSql example

    public function upsert($set = null, ?bool $escape = null)
    {
        // if set() has been used merge QBSet with binds and then setData()         if ($set === null && ! is_array(current($this->QBSet))) {
            $set = [];

            foreach ($this->QBSet as $field => $value) {
                $k = trim($field, $this->db->escapeChar);
                // use binds if available else use QBSet value but with RawSql to avoid escape                 $set[$k] = isset($this->binds[$k]) ? $this->binds[$k][0] : new RawSql($value);
            }

            $this->binds = [];

            $this->resetRun([
                'QBSet'  => [],
                'QBKeys' => [],
            ]);

            $this->setData($set, true); // unescaped items are RawSql now         } elseif ($set !== null) {