甲骨文重複函數調用select和where子句

我有一個重複以下Oracle SQL查詢甲骨文重複函數調用select和where子句

select /*+ORDERED */ payr.payroll_name payroll_name, 
     nvl(papf.employee_number, papf.npw_number) employee_number, 
     nvl 
     (
      xxpay_util.safe_to_number 
      (
      xxpay_util_element.get_run_result 
      (
       p_business_group_id => paaf.business_group_id, -- in  number 
       p_payroll_id   => paaf.payroll_id,   -- in  number 
       p_payroll_action_id => null,      -- in  number, 
       p_start_period  => mon.real_month_start,  -- in  date 
       p_end_period   => mon.real_month_end,  -- in  date 
       p_element_name_regex => '^Disability Cover ER$', -- in  varchar2 '^Disability Cover ER Opt Out$' 
       p_input_value  => 'Pay Value',    -- in  varchar2 
       p_assignment_id  => paaf.assignment_id,  -- in  number 
       p_aggregation  => 'sum',     -- in  varchar2 
       p_round    => 2      -- in  number default 2 
      ) 
     ), 
      0 
     ) disability_benefit, 
     nvl 
     (
      xxpay_util.safe_to_number 
      (
      xxpay_util_element.get_run_result 
      (
       p_business_group_id => paaf.business_group_id, -- in  number 
       p_payroll_id   => paaf.payroll_id,   -- in  number 
       p_payroll_action_id => null,      -- in  number, 
       p_start_period  => mon.real_month_start,  -- in  date 
       p_end_period   => mon.real_month_end,  -- in  date 
       p_element_name_regex => '^Death Cover ER Opt Out$', -- in  varchar2 
       p_input_value  => 'Pay Value',    -- in  varchar2 
       p_assignment_id  => paaf.assignment_id,  -- in  number 
       p_aggregation  => 'sum',     -- in  varchar2 
       p_round    => 2      -- in  number default 2 
      ) 
     ), 
      0 
     ) death_cover, 
     nvl 
     (
      xxpay_util.safe_to_number 
      (
      xxpay_util_element.get_run_result 
      (
       p_business_group_id => paaf.business_group_id, -- in  number 
       p_payroll_id   => paaf.payroll_id,   -- in  number 
       p_payroll_action_id => null,      -- in  number, 
       p_start_period  => mon.real_month_start,  -- in  date 
       p_end_period   => mon.real_month_end,  -- in  date 
       p_element_name_regex => '^Funeral Cover ER$', -- in  varchar2 '^Funeral Cover ER Opt Out$' 
       p_input_value  => 'Pay Value',    -- in  varchar2 
       p_assignment_id  => paaf.assignment_id,  -- in  number 
       p_aggregation  => 'sum',     -- in  varchar2 
       p_round    => 2      -- in  number default 2 
      ) 
     ), 
      0 
     ) funeral_cover, 
     ppos.actual_termination_date termination_date  
from (
      select ptp.payroll_id, 
       min(ptp.start_date) real_month_start, 
       max(ptp.end_date) real_month_end 
      from per_time_periods ptp 
      where decode(ptp.prd_information_category, 'ZA', to_char(ptp.pay_advice_date, 'yyyymm'), to_char(ptp.regular_payment_date, 'yyyymm')) = '201612' 
      group by ptp.payroll_id 
     ) mon, 
     pay_all_payrolls_f   payr, 
     per_all_assignments_f  paaf, 
     per_periods_of_service  ppos, 
     per_people_f     papf, 
     per_business_groups   pbg, 
     hr_all_organization_units haou, 
     per_jobs      pj, 
     pay_cost_allocation_keyflex pcak  
where payr.payroll_id = mon.payroll_id 
and mon.real_month_end between payr.effective_start_date and payr.effective_end_date 
and paaf.payroll_id = mon.payroll_id 
and paaf.assignment_type = 'E' 
and paaf.primary_flag = 'Y' 
and paaf.effective_start_date = 
(
    select max(paaf2.effective_start_date) 
    from per_all_assignments_f paaf2 
    where paaf2.assignment_id = paaf.assignment_id 
    and paaf2.assignment_type = 'E' 
    and paaf2.primary_flag = 'Y' 
    and paaf2.payroll_id = mon.payroll_id 
    and mon.real_month_start <= paaf2.effective_end_date 
    and mon.real_month_end >= paaf2.effective_start_date 
) 
and ppos.period_of_service_id = paaf.period_of_service_id 
and mon.real_month_start <= nvl(ppos.actual_termination_date, to_date('31/12/4712', 'dd/mm/yyyy')) 
and mon.real_month_end >= ppos.date_start 
and papf.person_id = paaf.person_id 
and papf.effective_start_date = 
(
    select max(papf2.effective_start_date) 
    from per_all_people_f papf2 
    where papf2.person_id = paaf.person_id 
    and mon.real_month_start <= papf2.effective_end_date 
    and mon.real_month_end >= papf2.effective_start_date 
) 
and pbg.business_group_id = paaf.business_group_id 
and haou.organization_id (+) = paaf.organization_id 
and pj.job_id (+) = paaf.job_id 
and pcak.cost_allocation_keyflex_id (+) = haou.cost_allocation_keyflex_id 
and 
(
    nvl 
    (
     xxpay_util.safe_to_number 
     (
     xxpay_util_element.get_run_result 
     (
      p_business_group_id => paaf.business_group_id, -- in  number 
      p_payroll_id   => paaf.payroll_id,   -- in  number 
      p_payroll_action_id => null,      -- in  number, 
      p_start_period  => mon.real_month_start,  -- in  date 
      p_end_period   => mon.real_month_end,  -- in  date 
      p_element_name_regex => '^Disability Cover ER$', -- in  varchar2 -- Disability Cover ER Opt Out 
      p_input_value  => 'Pay Value',    -- in  varchar2 
      p_assignment_id  => paaf.assignment_id,  -- in  number 
      p_aggregation  => 'sum',     -- in  varchar2 
      p_round    => 2      -- in  number default 2 
     ) 
    ), 
     0 
    ) 
    + 
    nvl 
    (
     xxpay_util.safe_to_number 
     (
     xxpay_util_element.get_run_result 
     (
      p_business_group_id => paaf.business_group_id, -- in  number 
      p_payroll_id   => paaf.payroll_id,   -- in  number 
      p_payroll_action_id => null,      -- in  number, 
      p_start_period  => mon.real_month_start,  -- in  date 
      p_end_period   => mon.real_month_end,  -- in  date 
      p_element_name_regex => '^Death Cover ER Opt Out$', -- in  varchar2 
      p_input_value  => 'Pay Value',    -- in  varchar2 
      p_assignment_id  => paaf.assignment_id,  -- in  number 
      p_aggregation  => 'sum',     -- in  varchar2 
      p_round    => 2      -- in  number default 2 
     ) 
    ), 
     0 
    ) 
    + 
    nvl 
    (
     xxpay_util.safe_to_number 
     (
     xxpay_util_element.get_run_result 
     (
      p_business_group_id => paaf.business_group_id, -- in  number 
      p_payroll_id   => paaf.payroll_id,   -- in  number 
      p_payroll_action_id => null,      -- in  number, 
      p_start_period  => mon.real_month_start,  -- in  date 
      p_end_period   => mon.real_month_end,  -- in  date 
      p_element_name_regex => '^Funeral Cover ER$', -- in  varchar2 -- Funeral Cover ER Opt Out 
      p_input_value  => 'Pay Value',    -- in  varchar2 
      p_assignment_id  => paaf.assignment_id,  -- in  number 
      p_aggregation  => 'sum',     -- in  varchar2 
      p_round    => 2      -- in  number default 2 
     ) 
    ), 
     0 
    ) 
) != 0 
and nvl 
     (
      xxpay_util_element.get_element_entry 
      (
      p_business_group_id => paaf.business_group_id, -- in  number 
      p_start_period  => mon.real_month_start,  -- in  date 
      p_end_period   => mon.real_month_end,  -- in  date 
      p_element_name_regex => '^Retirement Fund Opt In$', -- in  varchar2 
      p_input_value  => 'Opt In or Out',   -- in  varchar2 
      p_assignment_id  => paaf.assignment_id,  -- in  number 
      p_aggregation  => 'none',     -- in  varchar2 
      p_round    => 0      -- in  number default 2 
     ), 
      '$XXX$' 
     ) in ('NC', 'OUT') 
and exists 
(
    select 1 
    from pay_payroll_actions ppap, 
      pay_assignment_actions paap, 
      pay_action_interlocks pai, 
      pay_assignment_actions paar, 
      pay_payroll_actions ppar, 
      per_time_periods  ptp 
    where ppap.action_type in ('P', 'U') 
    and ppap.action_status = 'C' 
    and paap.payroll_action_id = ppap.payroll_action_id 
    and paap.action_status = 'C' 
    and pai.locking_action_id = paap.assignment_action_id 
    and paar.assignment_action_id = pai.locked_action_id 
    and ppar.payroll_action_id = paar.payroll_action_id 
    and ppar.action_type in ('R', 'Q') 
    and ptp.time_period_id = ppar.time_period_id 
    and decode(ptp.prd_information_category, 'ZA', to_char(ptp.pay_advice_date, 'yyyymm'), to_char(ptp.regular_payment_date, 'yyyymm')) = '201612' 
    and paap.assignment_id = paaf.assignment_id 
    and paar.assignment_id = paaf.assignment_id 
) 
order by pcak.segment2, papf.employee_number, paaf.assignment_number

有沒有辦法重寫查詢，以便該函數從SELECT子句（xxpay_util_element.get_run_result）調用where子句不重複，只調用一次？

來源

2017-02-06 Superdooperhero

你可以嘗試創建這個SQL作爲子查詢，並添加where子句中父查詢：

Select * from (
    select 
     xxpay_util_element.get_run_result as get_run_result_1, --only fetch values here 
      ....... 
    from ..... 

) 
where get_run_result_1 ......... --add where clause here

來源

2017-02-06 09:27:21 Vijay

奇怪的是它運行慢了許多作爲一個子查詢。我想這足夠聰明，首先消除加起來爲零的那些。 – Superdooperhero

這種方法不能可靠地工作。通過謂詞推送和其他Oracle優化器轉換，Oracle有可能會重新編寫查詢。如果沒有提示或特定功能，則不能保證內聯視圖會先運行。該查詢今天可能有效，但明天可能無法使用。 –

甲骨文重複函數調用select和where子句

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