我使用ACDOCA、BSID、MARA和MAKT此类表创建了一个 ABAP CDS 视图。现在我的 CDS 视图包含客户列表以及他们的未完成 (FI) 文档。
针对这些客户、FI 文档和某些更多参数，我在自定义表中维护某些数据。
现在使用左外连接，我想将此 CDS 视图与自定义表连接起来。现在的问题是这个连接就像内部连接一样工作，所以如果我的自定义表是空白的，我的输出显示没有值，而它应该显示 CDS 视图，并且自定义表字段为空白。
现在基于网上类似的问题，我做了研究，发现了一些有用的点：
右表上的所有条件最多包含在 ON 连接条件中
尝试从右侧自定义表中包含空值。
尝试在连接条件上仅使用一个参数来查看结果（仍然作为内部连接工作）
这是我完整的选择语句，其中：
ZPD1是我的 ABAP CDS 视图ACDOCA，BSDI... 表ZPD_HSL是用于客户明智 GL 金额计算的 ABAP CDS 视图。ZFI_PDRATE_MAP是我的自定义表，其中包含客户/FI 文档组合的费率。
这个声明中可能有什么失误？
SELECT
FROM ZPD1( PBUKRS = @BUKRS-LOW ,
POSTFROM = @COL_DATE-LOW ,
POSTTO = @COL_DATE-HIGH ) AS A
LEFT OUTER JOIN ZFI_PDRATE_MAP AS F
ON A~PROD_CATEGORY = F~PROD_CATEGORY
AND A~OD_DATE GE F~POST_DT_FROM
AND A~OD_DATE LE F~POST_DT_TO
AND F~COL_DT_FROM GE @COL_DATE-LOW
AND F~COL_DT_TO LE @COL_DATE-HIGH
AND F~SALES_OFFICE = @VKBUR-LOW
AND CASE WHEN A~ARREAR_DAYS <= 0 THEN 'NOD'
WHEN A~ARREAR_DAYS > 0 THEN 'OD'
END = F~OD
INNER JOIN KNA1 AS H
ON H~KUNNR = A~KUNNR
INNER JOIN TVKBT AS I
ON I~VKBUR = F~SALES_OFFICE
AND I~SPRAS = @SY-LANGU
LEFT OUTER JOIN SKAT AS J
ON J~SAKNR = A~HKONT
AND J~SPRAS = 'E'
AND J~KTOPL = '1000'
LEFT OUTER JOIN MAKT AS K
ON K~MATNR = A~MATNR
AND K~SPRAS = 'E'
LEFT OUTER JOIN T001W AS L
ON L~WERKS = A~WERKS
FIELDS
A~RBUKRS AS BUKRS,
A~KUNNR,
H~NAME1,
F~SALES_OFFICE,
I~BEZEI,
A~BELNR AS COL_BELNR,
A~GJAHR AS COL_GJAHR,
A~HSL AS COL_AMT,
A~BUDAT AS COL_DATE,
A~KEY_DATE AS KEY_OS_DATE,
A~OD_DOC AS OS_BELNR,
A~OD_YR AS OS_GJAHR,
A~BLART ,
A~OD_DATE AS OS_DATE,
CASE WHEN A~SHKZG = 'H' THEN CAST( A~WRBTR * -1 AS CURR( 12, 2 ) )
ELSE A~WRBTR
END AS OS_AMT ,
A~DUE_DATE,
A~ARREAR_DAYS,
CASE WHEN A~ARREAR_DAYS <= 0 THEN 'NOD'
WHEN A~ARREAR_DAYS > 0 THEN 'OD'
ELSE ' '
END AS OD_IND,
A~HKONT,
J~TXT50,
A~PROD_CATEGORY,
A~MATNR,
K~MAKTX,
A~WERKS ,
L~NAME1,
A~BWTAR,
A~PROFIT_CENTRE AS PRCTR,
COALESCE( F~PD_RATE , 0 ) AS RATE,
0 AS PD_AMT,
CASE WHEN A~ARREAR_DAYS > 0 THEN
CAST(
DIVISION(
( CAST( A~WRBTR * F~PD_RATE AS CURR( 15 ,2 ) ) ) ,
100 ,
3 )
AS CURR( 15, 2 ) )
* -1
ELSE
DIVISION(
( CAST( A~WRBTR * F~PD_RATE AS CURR( 15 , 2 ) ) ) ,
100 ,
3 )
END AS ITEM_PD_AMT, "DISCOUNT_RATE,
0 AS ITEM_PD_AMT1,
A~MAIN_TYPE
WHERE A~KUNNR IN @KUNNR
AND NOT EXISTS (
SELECT *
FROM ZFI_PAYMENT_DISC
WHERE BELNR = A~BELNR
AND GJAHR = A~GJAHR
AND BUKRS = A~RBUKRS
AND SALES_OFFICE = @VKBUR-LOW
AND A~KUNNR IN @KUNNR
AND OS_BELNR EQ A~OD_DOC )
AND A~ARREAR_DAYS <= @OD
AND ( F~COL_AMT_FROM LE (
SELECT SUM( COLLECT )
FROM ZPD_HSL( BUKRS = @BUKRS-LOW ,
BUDATFROM = @COL_DATE-LOW ,
BUDATO = @COL_DATE-HIGH )
WHERE KUNNR = A~KUNNR )
AND F~COL_AMT_TO GE (
SELECT SUM( COLLECT )
FROM ZPD_HSL( BUKRS = @BUKRS-LOW ,
BUDATFROM = @COL_DATE-LOW ,
BUDATO = @COL_DATE-HIGH )
WHERE KUNNR = A~KUNNR )
)
ORDER BY A~KUNNR, A~BELNR ,A~DUE_DATE ASCENDING
INTO TABLE @PROV_POST.