Pimcore\Model\Element\Tag\Listing\Dao::loadIdList PHP Method

    public function loadIdList()
    {
        $tagsIds = $this->db->fetchCol("SELECT id FROM tags" . $this->getCondition() . $this->getGroupBy() . $this->getOrder() . $this->getOffsetLimit(), $this->model->getConditionVariables());
        return $tagsIds;
    }