Unable to fetch data using control-blocks

Question

Hi,
I have created two non base table text items(from_date, to_date) and if values are not entered from front end i.e. null then hadrcoded in pre_query trigger to default values as from_date (system date-present month-last year) and to_date(system date-present month-present year).when i have pressed the fetch button without giving values to from_date and to_date,it is retrieving data in default period,which i ahave hardcoded in PRE_QUERY trigger.But even i enter values dynamically from front end and when ever i press fetch button ,it is retrieving data in default period instead giving data in specified duration what i have entered dynamically from front end. i.e. it is not accepting values what i have entered.
any one please help me.
oracle forms 10g version:10.1.2.0.2
Thanks and Regards
Ram

Answer 1

hi,
Thanks for ur feedback.
here query is executed. My problem is,unable to fetch data in specified period,what i have entered dynamically.Even i entered dynamically,it is fetching data in default period(Which i have hardcoded in PRE_QUERY).
below code is ,what i have hardcoded in PRE_QUERY
:GLOBAL.DFROMDT := NULL;
:GLOBAL.DTODT := NULL;
IF :HEADER_BLOCK.NBTFROMDT is NULL THEN
SELECT TO_DATE('10'||'/'||TO_CHAR(ADD_MONTHS(SYSDATE,-1),'MM')||'/'||
TO_CHAR(ADD_MONTHS(SYSDATE,-12),'YYYY'),'DD/MM/YYYY')
INTO :HEADER_BLOCK.NBTFROMDT FROM SYS.DUAL ;
END IF;
IF :HEADER_BLOCK.NBTTODT IS NULL THEN           
     SELECT SYSDATE INTO :HEADER_BLOCK.NBTTODT
     FROM SYS.DUAL;
END IF;
IF :HEADER_BLOCK.NBTFROMDT IS NOT NULL
OR :HEADER_BLOCK.NBTTODT IS NOT NULL THEN
:GLOBAL.DFROMDT := :HEADER_BLOCK.NBTFROMDT;
:GLOBAL.DTODT := :HEADER_BLOCK.NBTTODT;
END IF;
IF :DETAIL_BLOCK.nbtFjdDrCrInd IS NOT NULL THEN
     svWhere_String := 'WHERE FJH_VCHR_DT BETWEEN '''||nvl(:GLOBAL.DFROMDT,TO_DATE(:GLOBAL.DFROMDT,'DD/MM/YYYY'))||''' AND '||
''''||NVL(:GLOBAL.DTODT,TO_DATE(SYSDATE,'DD/MM/YYYY'))||''')';
     Set_Block_Property('DETAIL_BLOCK',DEFAULT_WHERE,svWhere_String);
ELSE
     Set_Block_Property('DETAIL_BLOCK',DEFAULT_WHERE,' ');
END IF;