hello, please help me,

The code below does not give its childs.

	​	​
 query = ("""             
	​	​	​SELECT
                    ROW_NUMBER() OVER (ORDER BY mw.id)as id,
                    mp.customer_code as partner_code, 
                    mp.name as ordername, 
                    mp.origin as origin,
                    mwc.name as workcenter,
                    mp.product_qty_with_tolerance                     
                from
                	​sale_order AS so
                     	​INNER JOIN mrp_production AS mp ON so.name = mp.origin
	​	​	​		​​LEFT JOIN mrp_workorder AS mw ON mw.production_id = mp.id
                    	​	​LEFT JOIN mrp_workcenter AS mwc ON mw.workcenter_id = mwc.id 
                                       
	​	​	​	​where so.state != 'cancel' and  so.partner_id = %d  """% docs.partner_id[0].id)