Custom Search Screen Question

Question

I have a search screen where the user can enter multiple search criteria fields and click 'FIND' button.
Below is the code behind the find button. As you can see if the use doesn't enter any of the search criteria
then it is supposed to get all the records in the block BLI_DATA (this is a db block built on a view of a table).
At the bottom of the BLI_DATA screen, there are two buttons 'OPEN' and 'CANCEL' (these belong to a diff. block called
BLI_DATA_ACTION). Open opens up the record selected in BLI_DATA. Cancel cancels out of this and takes back
to the search screen. That scenario works ok. Else if the user enters any of the criteria, then the dynamic where
gets the required records. That works too.
What is not working is, if I enter say state = 'LA' in the first pass and click find, it gets
me the records for LA. Then if I click'CANCEL'and come back to the search screen, remove all the search criteria
and now click 'FIND' in the 2nd pass, it still gets me the LA information.
Code behind the FIND button
DECLARE
  v_where varchar2(1000):=null;
  v_orderby varchar2(1000):='BLI_ID';
  al_id ALERT;
  al_button NUMBER;
BEGIN     
IF :BLI_SEARCH.BLI_STATE IS NULL AND :BLI_SEARCH.BLI_STORE_TYPE IS NULL
    AND :BLI_SEARCH.BLI_COUNTY IS NULL AND :BLI_SEARCH.BLI_COUNTY_NAME IS NULL
    AND :BLI_SEARCH.CITY IS NULL AND :BLI_SEARCH.GEO_IND IS NULL
    AND :BLI_SEARCH.BLI_PLAT_LEASE IS NULL AND :BLI_SEARCH.FORM_DATE_FROM IS NULL
    AND :BLI_SEARCH.BLI_LEASE_DATE_FROM IS NULL AND :BLI_SEARCH.FORM_DATE_TO IS NULL 
    AND :BLI_SEARCH.BLI_LEASE_DATE_TO IS NULL THEN
   --app_find.find('BLI_DATA');
   -- P_GET_BLI_DATA;
--   v_orderby:=':BLI_ID ASC';
--SET_BLOCK_PROPERTY('BLI_DATA',ORDER_BY,v_orderby);
  message('i am here' ||'-'|| :BLI_SEARCH.BLI_STATE);
  GO_BLOCK('BLI_DATA');
  Execute_Query(all_records);
  GO_BLOCK('BLI_DATA_ACTION');
  GO_ITEM('BLI_DATA_ACTION.OPEN'); 
ELSE
     v_where := 'WHERE state = nvl( ''' || :BLI_SEARCH.BLI_STATE ||''',state)
                                   and concept =  nvl( ''' || :BLI_SEARCH.BLI_STORE_TYPE ||''',concept)
                                   and county_type = nvl( ''' ||:BLI_SEARCH.BLI_COUNTY ||''' , county_type)
             and county_name = nvl( ''' || :BLI_SEARCH.BLI_COUNTY_NAME || ''', county_name)
             and city = nvl( ''' || :BLI_SEARCH.CITY || ''', city)
             and platform_lease = nvl( ''' || :BLI_SEARCH.BLI_PLAT_LEASE || ''', platform_lease)
             and geo_ind = nvl ( ''' || :BLI_SEARCH.GEO_IND || ''', geo_ind)
             and form_date >= nvl(to_date(''' || to_char(:BLI_SEARCH.FORM_DATE_FROM,'DD-MON-RR') || ''',''DD-MON-RR''),form_date)
                        and form_date <= nvl(to_date(''' || to_char(:BLI_SEARCH.FORM_DATE_TO,'DD-MON-RR') || ''',''DD-MON-RR''),form_date)
             and lease_date >= nvl(to_date(''' || to_char(:BLI_SEARCH.BLI_LEASE_DATE_FROM,'DD-MON-RR') || ''',''DD-MON-RR''),lease_date)
                        and lease_date <= nvl(to_date(''' || to_char(:BLI_SEARCH.BLI_LEASE_DATE_TO,'DD-MON-RR') || ''',''DD-MON-RR''),lease_date)';
SET_BLOCK_PROPERTY('BLI_DATA',DEFAULT_WHERE,v_where);
GO_BLOCK('BLI_DATA');
DO_KEY('execute_query');
message('i am here1 ' ||'-'|| :BLI_SEARCH.BLI_STATE);
IF :BLI_DATA.STATE IS NULL THEN
      al_id := Find_Alert('AOK');
     Set_Alert_Property(al_id, alert_message_text, 'No Records were found');
     al_button := Show_Alert(al_id);
     GO_BLOCK('BLI_SEARCH');
     GO_ITEM('BLI_SEARCH.BLI_STATE'); 
     RAISE FORM_TRIGGER_FAILURE;
ELSE
  GO_BLOCK('BLI_DATA_ACTION');
  GO_ITEM('BLI_DATA_ACTION.OPEN'); 
END IF;
END IF;
END;Code behind the CANCEL button:
GO_BLOCK('BLI_DATA');
CLEAR_BLOCK(NO_VALIDATE);
GO_BLOCK('BLI_SEARCH');
CLEAR_BLOCK(NO_VALIDATE);
:BLI_SEARCH.BLI_STATE :=NULL;
:BLI_SEARCH.BLI_STORE_TYPE:=NULL;
:BLI_SEARCH.BLI_COUNTY:=NULL;
:BLI_SEARCH.BLI_COUNTY_NAME:=NULL;
:BLI_SEARCH.CITY:=NULL;
:BLI_SEARCH.GEO_IND:=NULL;
:BLI_SEARCH.BLI_PLAT_LEASE:=NULL;
:BLI_SEARCH.FORM_DATE_FROM:=NULL;
:BLI_SEARCH.FORM_DATE_TO:=NULL;
:BLI_SEARCH.BLI_LEASE_DATE_FROM:=NULL;
:BLI_SEARCH.BLI_LEASE_DATE_TO:=NULL;
:BLI_SEARCH.BLI_LL_REF_CODE:=NULL;
:BLI_SEARCH.BLI_LOC_TYPE:=NULL;
:BLI_SEARCH.BLI_CLASSIFICATION:=NULL;
show_view('BLI_SEARCH');
GO_ITEM('BLI_SEARCH.BLI_STATE');
hide_view('BLI_DATA');When I remove all the search criteria in the 2nd pass, why does it still get the LA information?
Thanks,
Chiru
Edited by: Megastar_Chiru on Sep 21, 2010 9:44 AM

Answer 1

I had a similar requirement and I put it in a procedure like this.
PROCEDURE BUILD_WHERE_CLAUSE IS
  hold_clause varchar2(2000);
BEGIN
      -- check location code and add condition if it is not null
   IF :key_block.locn_code IS NOT NULL THEN
      hold_clause := hold_clause ||
      ' and (cwvcatr_locn_code = :key_block.locn_code)';
   END IF;
      -- check case type and add condition if it is not null
   IF :key_block.case_type IS NOT NULL THEN
      hold_clause := hold_clause ||
      ' and (cwvcatr_ctyp_code = :key_block.case_type)';
   END IF;
      -- check action code and add condition if it is not null
   IF :key_block.cwvatyp_code IS NOT NULL THEN
      hold_clause := hold_clause ||
      ' and (cwvcatr_cwvatyp_code = :key_block.cwvatyp_code)';
   END IF;
      -- check case assign day and add condition if it is not null
   IF :key_block.case_assn_day IS NOT NULL THEN
      hold_clause := hold_clause ||
      ' and (upper(cwvcatr_case_assn_day) = upper(:key_block.case_assn_day))';
   END IF;
      -- strip off initial 5 characters ' and '
   IF hold_clause IS NOT NULL THEN
      hold_clause := SUBSTR(hold_clause,6);
   END IF;
   -- Set the DEFAULT_WHERE to newly built WHERE clause
   SET_BLOCK_PROPERTY('CWVCATR_1_BLOCK',DEFAULT_WHERE,hold_clause);
      -- Set the ORDER_BY clause
      IF :key_block.sort_by = 'C' THEN
             SET_BLOCK_PROPERTY('CWVCATR_1_BLOCK',ORDER_BY,'cwvcatr_case_id');
      ELSE
             SET_BLOCK_PROPERTY('CWVCATR_1_BLOCK',ORDER_BY,'cwvcatr_assn_date');
      END IF;
END;So regardless of what user puts in parameters, the default where is set accordingly. If there is no parameter entered, it does not set anything. And if only one parameter is entered, only one condition is set and so on. This might be helpful in your case too.
Edited by: Zaafran Ahmed on Sep 21, 2010 10:49 AM