Case or Decode in the Where clause

Question

Dear all,
My requirement is:
If user select other then "ALL"option from the LOV the following condition should be part of the where clause.
current_req_status = :block1.req_statusIf user select "ALL" from the lov no need to append the above condition in the where clause.
Please give me the sample code
select request_id,doc_name,doc_code,part_id,current_req_status from  test_table
where req_type = 'I'
and doc_code = :BLOCK1.doc_code
and  -- Here is the condition is changed based on
        the :BLOCK1.req_status(LOV).
     -- If user select other then  "All" option from
        this LOV the query append the below condition
        current_req_status = :block1.req_status
      -- Else no need append the above condition
         in the query where clause.Edited by: roots on Apr 10, 2012 9:31 AM
Edited by: roots on Apr 10, 2012 9:38 AM

Answer 1

Hi InoL,
In the database column not having "ALL" value inside. so the match does not return any values.
My LOV has "A1,A2,A3,A4,....ALL" . the database column having "A1,A2,A3,A4.......". here no "ALL" value.
So if user select "ALL" option from this LOV, that means select all vaules from the database (A1,A2,A3,A4......)..
If user select A1 from the lov the select query include only the matched
column values.from example,
select....
where  nvl(database_column,'X')= nvl(:Block1.LOV_value)If user select "ALL" option then no need for above condition in the where clause so that query returns all the rows from the database column.
hope I've clearly explain my requirement.
Thanks lot,
Roots.