ABAP——value和reduce_abap reduce-优快云博客

本文链接：https://blog.youkuaiyun.com/weixin_42559610/article/details/115131186

本文介绍了REDUCE函数在循环插入内表和物料号分组中的使用，展示了VALUE用于循环赋值和数据筛选的过程。重点讲解了如何通过这些函数进行数据处理和信息整合。

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REDUCE:循环插入内表

  LOOP AT lt_zmmt0183 INTO DATA(ls_zmmt0183).
    rang_matkl[] = VALUE #( BASE rang_matkl[] ( sign = 'I' option = 'EQ' low = ls_zmmt0183-matkl ) ).
  ENDLOOP.

      <gs_out>-message
                  =  REDUCE string( INIT x TYPE string
                                      FOR wa IN <gs_out>-messages[]
                                      NEXT x = x && ';' && wa-message ).

REDUCE:根据物料号分组，把分组内的物料号串联给另一个内表的字段。

  LOOP AT gt_out ASSIGNING FIELD-SYMBOL(<fs_out>) GROUP BY <fs_out>-matnr.
    READ TABLE gt_out_temp INTO DATA(gs_out_temp) WITH KEY matnr = <fs_out>-matnr.
    gs_out_temp-lifnr_all
                =  REDUCE string( INIT x TYPE string
                                    FOR wa IN GROUP <fs_out>
                                    NEXT x = x  && wa-lifnr && ';').
    MODIFY gt_out_temp FROM gs_out_temp TRANSPORTING lifnr_all
            WHERE matnr = gs_out_temp-matnr.
  ENDLOOP.

VALUE:循环赋值

      LOOP AT lt_cdpos INTO DATA(ls_cdpos).
        so_matnr[] = VALUE #( BASE so_matnr[] ( sign = 'I' option = 'EQ' low = ls_cdpos-objectid ) ).
        len = strlen( ls_cdpos-tabkey ) - 4.
        so_werks[] = VALUE #( BASE so_werks[] ( sign = 'I' option = 'EQ' low = ls_cdpos-tabkey+len(4) ) ).
      ENDLOOP.

VALUE:定义工作区并省略read操作

        SELECT matnr,
               bstrf
          FROM marc
          INTO TABLE @DATA(lt_marc)
          FOR ALL ENTRIES IN @gt_po_out
          WHERE matnr = @gt_po_out-matnr.
          
      LOOP AT gt_po_out ASSIGNING FIELD-SYMBOL(<ls_po_out>).
        DATA(ls_marc) = VALUE #( lt_marc[ matnr = <ls_po_out>-matnr ] OPTIONAL ).
      ENDLOOP.

VALIE：直接赋值

  so_werks[] = VALUE #( ( sign = 'E' option = 'EQ' low = '1067' ) ( sign = 'E' option = 'EQ' low = '1069' )  ).