abap - 不用循环计算总计和小计？

Question

我开始学习新的 abap。但我有问题。我想在不使用“LOOP”和“AT”语句的情况下进行如下结果输出。

我有这样的内部表:

Category Amount
    AAA     10
    AAA     20
    BBB     30
    CCC     40
    CCC     50
    CCC     60

我需要将输出显示为:

Category Amount
    AAA       10
    AAA       20
    SUBTOTAL  30
    BBB       30
    SUBTOTAL  30
    CCC       40
    CCC       50
    CCC       60
    SUBTOTAL  150
    TOTAL     210

有人可以帮忙吗？

Answer 1

如果您的问题是关于如何使用构造函数表达式 (ABAP >= 7.40) 构建内部表(在内存中)，而不是将其呈现在屏幕上或假脱机文件中(总计和小计是 ALV 中集成的功能)并且易于使用)，那么这是一种方法(此处使用 ASSERT 来表明最终值符合预期):

TYPES : BEGIN OF ty_line,
          category TYPE string,
          amount   TYPE decfloat16,
        END OF ty_line,
        ty_lines TYPE STANDARD TABLE OF ty_line WITH DEFAULT KEY.

DATA(gt_main) = VALUE ty_lines( ( category = 'AAA' amount = 10 )
                                ( category = 'AAA' amount = 20 )
                                ( category = 'BBB' amount = 30 )
                                ( category = 'CCC' amount = 40 )
                                ( category = 'CCC' amount = 50 )
                                ( category = 'CCC' amount = 60 ) ).

DATA(lt_display) = VALUE ty_lines(
        ( LINES OF VALUE #(
              FOR GROUPS <g> OF <line> IN gt_main
              GROUP BY ( category = <line>-category )
              ( LINES OF VALUE #( FOR <line2> IN GROUP <g> ( <line2> ) ) )
              ( category = 'SUBTOTAL'
                amount = REDUCE #( INIT subtotal TYPE ty_line-amount
                                   FOR <line2> IN GROUP <g>
                                   NEXT subtotal = subtotal + <line2>-amount ) ) ) )
        ( category = 'TOTAL'
          amount = REDUCE #( INIT total TYPE ty_line-amount
                             FOR <line> IN gt_main
                             NEXT total = total + <line>-amount ) ) ).

ASSERT lt_display = VALUE ty_lines( ( category = 'AAA'      amount = 10 )
                                    ( category = 'AAA'      amount = 20 )
                                    ( category = 'SUBTOTAL' amount = 30 )
                                    ( category = 'BBB'      amount = 30 )
                                    ( category = 'SUBTOTAL' amount = 30 )
                                    ( category = 'CCC'      amount = 40 )
                                    ( category = 'CCC'      amount = 50 )
                                    ( category = 'CCC'      amount = 60 )
                                    ( category = 'SUBTOTAL' amount = 150 )
                                    ( category = 'TOTAL'    amount = 210 ) ).