FM：POSTING_INTERFACE_CLEARING
目的：财务分别做预收款和开 billing，需要后续做清账对冲 DZ 和 RV。
逻辑：由于只需要模拟人工 F-32 做清账，只需要根据 XBLNR 找到借贷方进行对冲即可，因此程序非常简单，核心传递的值为 it_ftclear-selfd。由于 VF01 开票中已经做了拆分增强，所以 Billing 的金额和 DZ 的金额是无法对应上的，因此无法采用标准自动清账配置，必须开发实现。
函数：POSTING_INTERFACE_CLEARING；POSTING_INTERFACE_CLEARING 并非纯函数，本质上是调用 BDC。
清账逻辑：取出RV、DZ、DG，将 XBLNR 字段相同的行组合在一起，清账。处理异常，事务代码：F-32。
- SE16 查询表 BSAD 按 BUKRS、AUGBL、GJAHR 查询，可查询到清账凭证行及原始行信息
FORM frm_create_ab.
*重点需要解决的两个问题：1. 清账函数的使用；
* 2. 清账数据的准备（按照公司业务逻辑）.
DATA: it_blntab TYPE TABLE OF blntab WITH HEADER LINE,
it_ftclear TYPE TABLE OF ftclear WITH HEADER LINE,
it_ftpost TYPE TABLE OF ftpost WITH HEADER LINE,
it_fttax TYPE TABLE OF fttax WITH HEADER LINE.
DATA: lt_bsad_clearing TYPE TABLE OF bsad WITH HEADER LINE. "客户未清项表"
DATA: lt_kunnr TYPE TABLE OF zthy_ecc_kunnr WITH HEADER LINE.
DATA: lv_ftclear_agbuk TYPE bukrs. "清账公司代码"
"每次处理一个客户的清账业务."
*宏.
*SELFD = Field Name from the Document Index
*SELVON = Input Field for Search Criterion for Selecting Open Items.
DEFINE populate_ftclear.
it_ftclear-agkoa = &1. "科目类型"
it_ftclear-agbuk = &2. "公司代码"
it_ftclear-xnops = 'X'. "标准未清项目"
it_ftclear-AGUMS = 'A'. "特别总账未清项目"
it_ftclear-selfd = 'XBLNR'. "凭证索引中的字段名(使用该字段搜索用来做对冲的借贷方)"
it_ftclear-selvon = &3. "Input Field for Search Criterion for Selecting Open Items"
append it_ftclear.
END-OF-DEFINITION.
DEFINE populate_ftpost.
it_ftpost-stype = &1. "K为header，P为item"
it_ftpost-count = &2. "凭证抬头或行项目的计数器(记帐界面)"
it_ftpost-fnam = &3. "BDC 字段名"
it_ftpost-fval = &4. "BDC 字段值"
append it_ftpost.
END-OF-DEFINITION.
*1.Start of call transaction: SHDB.
CALL FUNCTION 'POSTING_INTERFACE_START'
EXPORTING
i_client = sy-mandt
i_function = 'C' "B= BDC, C= Call Trans"
i_mode = 'N' "N – no screen, A – all screen, E – Error"
i_update = 'S' "S: 数据更新完成后执行下一个操作"
i_keep = 'X' "用于已处理会话的队列删除标志"
i_user = sy-uname
EXCEPTIONS
client_incorrect = 1
function_invalid = 2
group_name_missing = 3
mode_invalid = 4
update_invalid = 5
OTHERS = 6.
IF sy-subrc <> 0.
* Implement suitable error handling here
ENDIF.
*2.Fill data for SHDB.
populate_ftclear 'D' '1000' 'SA00012090'. "调用两次，一次借方，一次贷方."
*每执行一次添加一条清账行项目.如果借贷方分录不是正好等于两条，则应使用loop追加清账条目.
populate_ftpost: 'K' 1 'BKPF-BUKRS' '1000',
'K' 1 'BKPF-BLART' 'AB',
'K' 1 'BKPF-BLDAT' sy-datum,
'K' 1 'BKPF-BUDAT' sy-datum,
'K' 1 'BKPF-XBLNR' 'SA00012090', "清账参考号"
'K' 1 'BKPF-WAERS' 'CNY'.
**由于根据参考号(XBLNR)自动搜索清账的方式进行清账，因此行项目级别均不需要传值.
** 'P' 1 'RF05A-NEWBS' '17',
* 'P' 1 'RF05A-NEWBS' '18', "通过FB05进行预收和应收对冲清账时，记账码为18（手工做F-32为17）
* 'P' 1 'RF05A-NEWUM' '', "Special G/L indicator"
** 'P' 1 'BSEG-HKONT' '0011220001',
* 'P' 1 'BSEG-KUNNR' '0011000000', "统驭科目"
** 'P' 1 'BSEG-WRBTR' '347.09', "程序根据搜索条件自动搜出金额，无需指定"
* 'P' 1 'BSEG-ZFBDT' sy-datum,
* 'P' 1 'BSEG-SGTXT' '清账测试'.
populate_ftpost: 'K' 2 'BKPF-BUKRS' '1000',
'K' 2 'BKPF-BLART' 'AB',
'K' 2 'BKPF-BLDAT' sy-datum,
'K' 2 'BKPF-BUDAT' sy-datum,
'K' 2 'BKPF-XBLNR' 'SA00012090', "清账参考号.
'K' 2 'BKPF-WAERS' 'CNY'.
**由于根据参考号(XBLNR)自动搜索清账的方式进行清账，因此行项目级别均不需要传值.
* 'P' 2 'RF05A-NEWBS' '09',
* 'P' 2 'RF05A-NEWUM' 'A', "Special G/L indicator."
** 'P' 2 'BSEG-HKONT' '0022030001',
* 'P' 2 'BSEG-KUNNR' '0011000000', "统驭科目"
** 'P' 2 'BSEG-WRBTR' '347.09', "程序根据搜索条件自动搜出金额，无需指定"
* 'P' 2 'BSEG-ZFBDT' sy-datum,
* 'P' 2 'BSEG-SGTXT' '清账测试'.
*3.Process BDC.
*每次只能传入一个清账分录.
*AUGLV Purpose
*AUSGZAHL Outgoing payment
*EINGZAHL Incoming payment
*GUTSCHRI Credit memo(W为承兑汇票，可能比较特殊)
*UMBUCHNG Transfer posting with clearing
CALL FUNCTION 'POSTING_INTERFACE_CLEARING' "Post with clearing (FB05) using internal posting interface
EXPORTING
i_auglv = 'AUSGZAHL' " t041a-auglv Clearing Transaction
i_tcode = 'FB05' " sy-tcode Transaction code
i_sgfunct = space " rfipi-sgfunct Different FUNCT function
IMPORTING
e_msgid = sy-msgid " sy-msgid Message ID
e_msgno = sy-msgno " sy-msgno Message number
e_msgty = sy-msgty " sy-msgty Message category
e_msgv1 = sy-msgv1 " sy-msgv1 Message variable 1
e_msgv2 = sy-msgv2 " sy-msgv2 Message variable 2
e_msgv3 = sy-msgv3 " sy-msgv3 Message variable 3
e_msgv4 = sy-msgv4 " sy-msgv4 Message variable 4
TABLES
t_blntab = it_blntab " blntab Table of the document numbers
t_ftclear = it_ftclear " ftclear Clearing data
t_ftpost = it_ftpost " ftpost Document header and item data
t_fttax = it_fttax " fttax Taxes
EXCEPTIONS
clearing_procedure_invalid = 1
clearing_procedure_missing = 2
table_t041a_empty = 3
transaction_code_invalid = 4
amount_format_error = 5
too_many_line_items = 6
company_code_invalid = 7
screen_not_found = 8
no_authorization = 9
OTHERS = 10.
IF sy-subrc EQ 0.
"清账成功，清账凭证信息存储在it_blntab中.
ELSE.
"清账失败，查看importing中的消息.
ENDIF.
*4.After bdc processing.
CALL FUNCTION 'POSTING_INTERFACE_END'
EXPORTING
i_bdcimmed = 'X'
EXCEPTIONS
session_not_processable = 1
OTHERS = 2.
*5.log record.
ENDFORM.