/**
     * Get the mapping data: measure units
     *
     * @return array
     */
    public function getMeasureUnit()
    {
        $rows = Shopware()->Db()->query('
					SELECT
							C.id, CONCAT(C.description, " (", C.unit, ")") name,
							C.description, C.unit,
							IFNULL(PMC.plentyID, 0) plentyID
						FROM s_core_units C
						LEFT JOIN plenty_mapping_measure_unit PMC
							ON PMC.shopwareID = C.id
						ORDER BY C.description
				')->fetchAll();
        $plentyMU = PlentymarketsConfig::getInstance()->getItemMeasureUnits();
        foreach ($rows as &$row) {
            if ($row['plentyID']) {
                $row['plentyName'] = $plentyMU[$row['plentyID']]['name'];
            } else {
                if ($this->auto) {
                    $plentyUnits = PlentymarketsConfig::getInstance()->getItemMeasureUnits();
                    foreach ($plentyUnits as $plentyData) {
                        preg_match('/(.*?) \\((.*?)\\)/', $plentyData['name'], $matches);
                        if (!is_array($matches)) {
                            $name = $plentyData['name'];
                            $unit = '';
                        } else {
                            list($match, $name, $unit) = $matches;
                        }
                        $distance = levenshtein($row['description'], $name);
                        if ($row['unit'] == $unit || $distance <= 2) {
                            $row['plentyName'] = $plentyData['name'];
                            $row['plentyID'] = $plentyData['id'];
                            PlentymarketsMappingController::addMeasureUnit($row['id'], $plentyData['id']);
                            break;
                        }
                    }
                } else {
                    $row['plentyName'] = '';
                }
            }
        }
        return $rows;
    }