客户对账单本月欠款

create or replace function byamountfn
(
    customernum varchar2,
    startdate   date,
    enddate     date
) return char is
    v_amount          number;
    v_receipt_amount  number;
    refundamount      number;
    l_receive_amount1 number;
    l_receive_amount2 number;
    lastdebt          number;
    thisamount        number;
    thismoeny         number;
    upextendedamount  number;
begin
    ---------------------------**********得到上月欠款**************-------------------------------
    select sum(nvl(rct.extended_amount_tax, 0)) extended_amount --当前参数日期之前的所有货款
      into v_amount
      from (select ctl.customer_trx_line_id,
                   ct.customer_trx_id,
                   ct.initial_customer_trx_id,
                   ct.trx_number,
                   nvl(cux_ar_utl_pkg.get_trx_gl_date(ct.customer_trx_id),
                       ct.trx_date) trx_date,
                   ct.bill_to_customer_id,
                   nvl(ctl.gross_extended_amount, ctl.extended_amount) extended_amount_tax
              from ra_customer_trx_all       ct,
                   ra_customer_trx_lines_all ctl,
                   hz_parties                hpt,
                   hz_cust_accounts          hca,
                   ra_cust_trx_types_all     ctt,
                   mtl_units_of_measure      uom
             where ct.customer_trx_id = ctl.customer_trx_id
               and ct.org_id = ctl.org_id
               and ct.bill_to_customer_id = hca.cust_account_id
               and hca.party_id = hpt.party_id
               and ctt.cust_trx_type_id = ct.cust_trx_type_id
               and ctl.line_type != 'TAX'
               and ctt.type in ('INV', 'CM')
               and ctt.cust_trx_type_id !=
                   cux_ar_utl_pkg.get_return_commitment_type
                  --  AND ctt.NAME != 'SH-内销开帐'
               and ctl.uom_code = uom.uom_code(+)) rct
     where 1 = 1
       and rct.bill_to_customer_id =
           (select a.customer_id
              from ar_customers a
             where a.customer_number = customernum)
       and rct.trx_date <= startdate - 1;

    select sum(nvl(acr.functional_amount, 0)) --当前参数日期之前的所有应付款
      into v_receipt_amount
      from ar_cash_receipts_v acr
     where acr.gl_date <= startdate - 1
       and acr.state != 'REVERSED'
       and acr.customer_id =
           (select a.customer_id
              from ar_customers a
             where a.customer_number = customernum);

    select nvl(sum(araa.amount_applied), 0) --当前参数日期之前的所有退款
      into refundamount
      from ar_cash_receipt_history_all    acrh,
           ar_cash_receipts_all           acr,
           ar_receivable_applications_all araa
     where acrh.gl_date <= startdate - 1
       and acrh.status != 'REVERSED'
       and acr.cash_receipt_id = acrh.cash_receipt_id
       and acrh.cash_receipt_history_id = araa.cash_receipt_history_id
       and araa.applied_customer_trx_id is null
       and acrh.org_id = acr.org_id
       and araa.display = 'Y'
       and araa.status = 'ACTIVITY'
       and acr.pay_from_customer =
           (select a.customer_id
              from ar_customers a
             where a.customer_number = customernum);
    lastdebt := (v_amount - v_receipt_amount + refundamount); --小于当前日期之前的所有货款 减去 小于当前日期之前的所有应付帐款 加小于当前日期之前的所有退款=上月欠款
    ---------------------------***********本月货款**********------------------------------- 
    select nvl(sum(extended_amount), 0)
      into thisamount
      from (select ct.trx_number,
                   ct.trx_date,
                   decode(ctl.gross_extended_amount,
                          null,
                          ctl.extended_amount,
                          ctl.gross_extended_amount) as extended_amount
              from ra_customer_trx_all          ct,
                   ra_customer_trx_lines_all    ctl,
                   hz_parties                   hpt,
                   hz_cust_accounts             hca,
                   ra_cust_trx_types_all        ctt,
                   mtl_units_of_measure         uom,
                   ra_cust_trx_line_gl_dist_all rctl
             where ct.customer_trx_id = ctl.customer_trx_id
               and rctl.customer_trx_id = ct.customer_trx_id
               and 'REC' = rctl.account_class
               and 'Y' = rctl.latest_rec_flag
               and ct.org_id = ctl.org_id
               and ct.bill_to_customer_id = hca.cust_account_id
               and hca.party_id = hpt.party_id
               and ctt.cust_trx_type_id = ct.cust_trx_type_id
               and ctl.line_type != 'TAX'
               and ctt.type in ('INV', 'CM')
               and ctt.cust_trx_type_id !=
                   cux_ar_utl_pkg.get_return_commitment_type
                  -- AND ctt.NAME != 'SH-内销开帐'
               and ctl.uom_code = uom.uom_code(+)
               and to_char(rctl.gl_date, 'yyyy-mm-dd') between
                   to_char(startdate, 'YYYY-MM-DD') and
                   to_char(enddate, 'YYYY-MM-DD')
               and hca.account_number = customernum);
    ---------------------------**********本月回款************------------------------------- 
    select nvl(sum(acr.functional_amount), 0) --付款
      into l_receive_amount1
      from ar_cash_receipts_v acr
     where to_char(acr.gl_date, 'YYYY-MM-DD') between
           to_char(startdate, 'YYYY-MM-DD') and
           to_char(enddate, 'YYYY-MM-DD')
       and acr.state != 'REVERSED'
       and acr.customer_id =
           (select a.customer_id
              from ar_customers a
             where a.customer_number = customernum);
    select nvl(sum(araa.amount_applied), 0) --退款
      into l_receive_amount2
      from ar_cash_receipt_history_all    acrh,
           ar_cash_receipts_all           acr,
           ar_receivable_applications_all araa
     where to_char(acrh.gl_date, 'YYYY-MM-DD') between
           to_char(startdate, 'YYYY-MM-DD') and
           to_char(enddate, 'YYYY-MM-DD')
       and acrh.status != 'REVERSED'
       and acr.cash_receipt_id = acrh.cash_receipt_id
       and acrh.cash_receipt_history_id = araa.cash_receipt_history_id
       and araa.applied_customer_trx_id is null
       and acrh.org_id = acr.org_id
       and araa.display = 'Y'
       and araa.status = 'ACTIVITY'
       and acr.pay_from_customer =
           (select a.customer_id
              from ar_customers a
             where a.customer_number = customernum);
    thismoeny := (l_receive_amount1 - l_receive_amount2); --本月回款 = 本月应付帐款-本月退款
    ---------------------------**********本月欠款************-------------------------------              
    --本月欠款= 上月欠款+本月货款-本月回款          
    upextendedamount := (lastdebt + thisamount - thismoeny);
    return upextendedamount;
end;

cux_ar_utl_pkg.get_return_commitment_type

function get_return_commitment_type return number is
cursor csr_type is
select cust_trx_type_id from ra_cust_trx_types_all where name = 'SH-保证金退回'; retval number;
begin
open csr_type; fetch csr_type into retval; close csr_type; return nvl(retval, -1);
end;