Need to retrieve this required data

Question

i've a master detail form
i have query screen that user should fill its items & then press button (Extract)that will leads it to execute the whole query query go_block(master) execute query ;
the parameters is divided in to two parts some is compared in the master query & the others is in the detail query
but when i choose fill the parameter of the detail & press extract it retrieves all the master & doesnot retrieve the details while it should retrieve the coressponding master with the requested detail

Answer 1

Let your parameter block items be param_11 -for doc number, param_12 -for customer no for master block
and param_21 - for container number and param22 -for container type for detail block
Your where clause for master block should be
Where (doc_no = :param_11 or :param_11 is null)
and (cust_no = :param_12 or :param_12 is null)
and exists (select 1 from detail_Table
Where doc_no = detail_Doc_no /*relation between master and detail*/
and (detail_container_no = :param_21 or :param_21 is null)
and (detail_container_type = :param_22 or :param_22 is null)
.....etc for all parameters belongs to detail
)If you have set the relation b/w master and detail perfectly, then i dont think you require any where clause for detail block