Issue with the query

Question

Hi Friends,
I am having a problem with this query. The query is to fetch all the elements for the employees. The elements that need to be fetched are set up in the flex sets.
In the table fnd_flex_values there are columns start_date_active and end_date_active fields and these are null. In the below query when I use the condition
and trunc(sysdate) between NVL(ffv.start_Date_active,TO_DATE('01-JAN-1951','DD-MON-YYYY')) and NVL(ffv.end_Date_active,TO_DATE('31-DEC-4712','DD-MON-YYYY'))
the query fetches the results in 5seconds
but when I replace the same query with the statement
and to_date(to_char(ppa.date_earned,'DD-MON-YYYY'),'DD-MON-YYYY') between NVL(ffv.start_Date_active,TO_DATE('01-JAN-1951','DD-MON-YYYY')) and NVL(ffv.end_Date_active,TO_DATE('31-DEC-4712','DD-MON-YYYY'))
the query takes a lot of time. Infact it gets timed out
Columns start_date_active and end_date_active fields are date type. Can anyone say what is the issue with this query
When I give the sysdate instead of ppa.date_earned date
select papf.person_id, papf.full_name, papf.employee_number
,petf.element_name, pivf.name,
prrv.result_value, ppa.date_earned,ppa.effective_date, to_char(ppa.date_earned,'DD-MON-YYYY') date_earned, paaf.assignment_id, petf.effective_start_date
,petf.effective_end_date, ffv.*
from per_all_people_f papf
,per_all_assignments_f paaf
,pay_payroll_actions ppa
,pay_assignment_actions paa
,pay_element_types_f petf
,pay_input_values_f pivf
,pay_run_results prr
,pay_run_result_values prrv
,per_person_type_usages_f pptuf
,per_person_types ppt
,fnd_flex_values ffv
,fnd_flex_value_sets ffvs
where 1=1
and papf.person_id = paaf.person_id
and trunc(ppa.date_earned) between trunc(papf.effective_start_date) and trunc(papf.effective_end_date)
and trunc(ppa.date_earned) between trunc(paaf.effective_start_date) and trunc(paaf.effective_end_date)
and paa.assignment_id = paaf.assignment_id
and paa.action_status='C'
and ppa.payroll_id = 61
--and ppa.consolidation_set_id = 108
and ppa.payroll_action_id = paa.payroll_action_id
and prr.assignment_action_id = paa.assignment_action_id
and prr.element_type_id = petf.element_type_id
-- and trunc(ppa.date_earned) between trunc(petf.effective_start_date) and trunc(petf.effective_end_date)
and trunc(sysdate) between petf.effective_start_date and petf.effective_end_date
and prrv.run_result_id = prr.run_result_id
and prrv.input_value_id = pivf.input_value_id
and     prr.status in ('P','PA')
and pivf.name ='Pay Value'
and ppa.date_earned between pivf.effective_start_date and pivf.effective_end_date
and ppa.time_period_id=145
and paaf.person_id = pptuf.person_id
and pptuf.person_type_id = ppt.person_type_id
and ppt.user_person_type = nvl('Employee',ppt.user_person_type)
and trunc(ppa.date_earned) between pptuf.effective_start_date and pptuf.effective_end_date
and petf.element_name = ffv.flex_value
and ffv.flex_value_set_id = ffvs.flex_value_set_id
and ffv.enabled_flag ='Y'
and ffvs.flex_value_set_name='GROUP_ELEMENTS'
and trunc(sysdate) between NVL(ffv.start_Date_active,TO_DATE('01-JAN-1951','DD-MON-YYYY')) and NVL(ffv.end_Date_active,TO_DATE('31-DEC-4712','DD-MON-YYYY'))
-- and trunc(ppa.effective_date) between nvl(ffv.start_Date_active,trunc(ppa.effective_date)) and NVL(ffv.end_Date_active,trunc(ppa.effective_date))
-- and to_date(to_char(ppa.date_earned,'DD-MON-YYYY'),'DD-MON-YYYY') between NVL(ffv.start_Date_active,TO_DATE('01-JAN-1951','DD-MON-YYYY')) and
order by ffv.parent_flex_value_low, papf.employee_number;
Thanks

Answer 1

ʃʃp wrote:
/* Formatted on 2012/06/11 13:34 (Formatter Plus v4.8.8) */
SELECT DISTINCT fr_ir_code, fr_fc_code1, product1, param_rep_prd, no_of_links_start_ir, no_of_supps_start_ir
           FROM comm_exst_rp_comit_aggr_irview
          WHERE fr_ir_code = 'AS01'
            AND srta_period = 2
            AND srta_year = 2011
            AND param_rep_prd = '2011-2'
            AND DECODE (:bind_variable, 'All', 1, 0) = DECODE (:bind_variable, 'All', 1, 1)
       GROUP BY fr_ir_code, fr_fc_code1, product1, param_rep_prd, no_of_links_start_ir, no_of_supps_start_ir
UNION
SELECT DISTINCT fr_ir_code, fr_fc_code1, product1, param_rep_prd, no_of_links_start_irda AS no_of_links_start_ir,
                no_of_supps_start__irda AS no_of_supps_start_ir
           FROM comm_exst_rp_comit_aggr_irview
          WHERE fr_ir_code = 'AS01'
            AND srta_period = 2
            AND srta_year = 2011
            AND param_rep_prd = '2011-2'
            AND da_status = 'N'
            AND DECODE (:bind_variable, 'All', 1, 0) = DECODE (:bind_variable, 'All', 0, 0)
       GROUP BY fr_ir_code, fr_fc_code1, product1, param_rep_prd, no_of_links_start_irda, no_of_supps_start__irdaYes Union is one of the best solutions for handling two queries.
As per my understanding DECODE function use is:
DECODE (value,<if this value>,<return this value>,
<if this value>,<return this value>,
<otherwise this value>)
But I am little bit jumbled for understanding below two lines in the query..
1)
AND DECODE (:bind_variable, 'All', 1, 0) = DECODE (:bind_variable, 'All', 1, 1)
2)
AND DECODE (:bind_variable, 'All', 1, 0) = DECODE (:bind_variable, 'All', 0, 0)Can you please tell me how the comparision is done using DECODE function?