如何解决确定 LOOP AT ... GROUP BY 中的最后一组?
我正在 LOOP AT ... GROUP BY 语句中寻找与 A LAST 语句等效的语句。
我使用 group by 进行循环,出于性能原因,当一定数量的记录累积到内部表中时,我每隔几组执行一次调用方法。但是如果我在最后一组,我想添加一个额外的条件来在循环结束时运行这个调用。
下面我写了一段模拟我的问题的可执行代码,我想在退出循环之前处理我的最后一个材料。
constants: processing_size_threshold type i value 10.
types: begin of ty_material,material_num type c length 3,end of ty_material.
data: materials type standard table of ty_material,materials_bom type standard table of ty_material.
materials = value #( for i = 1 then i + 1 while i <= 3
( material_num = conv #( i ) ) ).
loop at materials reference into data(material_grp) group by material_grp->material_num.
loop at group material_grp reference into data(material).
materials_bom = value #( base materials_bom (
lines of value #( for j = 1 then j + 1 while j <= 5
( material_num = |{ material->material_num }{ j }| ) ) ) ).
endloop.
"The 2nd condition of this IF is what I'm not able to figure out,I need material 3 BOM to be processed here
if lines( materials_bom ) >= processing_size_threshold. "or group_num = last_group.
"me->process_boms(materials_bom).
clear materials_bom.
endif.
endloop.
解决方法
首先:最好是放置 real-world examples,而不是像您那样放置充满随机数字嗡嗡声的无意义表格。那样你可能会得到错误的答案。
如果您只想处理最后一组,您可以使用 GROUP INDEX:
SELECT matnr AS matno
FROM vbap UP TO 100 ROWS
INTO TABLE @DATA(materials)
ORDER BY matnr.
TYPES: ty_mats LIKE materials.
DATA: bom LIKE materials.
DATA(uniques) = lines( VALUE ty_mats( FOR GROUPS value OF <line> IN materials GROUP BY ( matno = <line>-matno ) WITHOUT MEMBERS ( value ) ) ).
LOOP AT materials REFERENCE INTO DATA(refmat) GROUP BY ( id = refmat->matno size = GROUP SIZE gi = GROUP INDEX ) ASCENDING REFERENCE INTO DATA(group_ref).
CHECK group_ref->*-gi = uniques.
bom = VALUE ty_mats( BASE bom FOR <mat> IN GROUP group_ref ( matno = <mat>-matno ) ).
me->process_boms( bom ). "<--here comes the drums
ENDLOOP.
注意:表格必须按 INDEX 排序才能显示正确的值。
在这个片段中使用了非常简单的方法:首先我们计算唯一组的总数,然后检查每个组索引是否是最后一个。
请注意,数据集中最后的内容仅取决于排序顺序,因此您很容易得到不准确的值以满足您的要求。
,你是这个意思吗?sy-tabix
当前循环索引可能会有所帮助。
否则,您可能需要先计算组数。
constants: processing_size_threshold type i value 10.
types: begin of ty_material,material_num type c length 3,end of ty_material.
data: materials type standard table of ty_material,materials_bom type standard table of ty_material.
materials = value #( for i = 1 then i + 1 while i <= 3
( material_num = conv #( i ) ) ).
loop at materials reference into data(material_grp) group by material_grp->material_num.
loop at group material_grp reference into data(material).
materials_bom = value #( base materials_bom (
lines of value #( for j = 1 then j + 1 while j <= 5
( material_num = |{ material->material_num }{ j }| ) ) ) ).
endloop.
"The 2nd condition of this IF is what I'm not able to figure out,I need material 3 BOM to be processed here
if lines( materials_bom ) >= processing_size_threshold
or lines( materials ) = sy-tabix.
"me->process_boms(materials_bom).
clear materials_bom.
endif.
endloop.
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