按索引

Question

如何为字段指定具有特定索引的值。 或者如果该字段不是初始值，我想更改此索引的值 示例：

TYPES : BEGIN OF itab,
         number1 type n,
endof itab.

lv_tabix = sy-tabix.

itab-number1 index lv-tabix = '1'.

Answer 1

检查句子MODIFY（itab）的帮助： https://help.sap.com/doc/abapdocu_750_index_htm/7.50/en-US/abapmodify_itab_single.htm

DATA: workarea TYPE your_type.

workarea-field = value.
"modifying for an index
MODIFY your_table INDEX your_index FROM workarea TRANSPORTING field.
"modifying for a condition
MODIFY your_table FROM workarea TRANSPORTING field WHERE your_condition.

或者你可以使用FIELD-SYMBOLS，就像Anton在我之前所指出的那样。

Answer 2

如果您使用的是最近的ABAP版本，请使用table expressions：

TRY. 

    itab[ lv-tabix ]-number1  = '1'.

 CATCH cx_sy_itab_line_not_found INTO DATA(exc). 
 cl_demo_output=>display( exc->get_text( ) ). 
ENDTRY. 

Answer 3

您应该按索引读取表并首先将目标行分配给字段符号：

READ TABLE {your itab} INDEX lv_tabix ASSIGNING FIELD-SYMBOL(<fs>).
<fs>-number1 = '1'.

根据您的服务器版本，可能需要单独的字段符号声明：

 FIELD-SYMBOLS <fs> TYPE {your table line type}

检查READ TABLE在线帮助https://help.sap.com/doc/abapdocu_752_index_htm/7.52/en-US/abapread_table_outdesc.htm#!ABAP_ALTERNATIVE_2@2@

Answer 4

此？

TYPES: begin OF ty_itab,
       number1 TYPE n,
END OF ty_itab.

DATA: itab TYPE TABLE OF ty_itab,
      wa_itab like line of itab,
      lv_tabix TYPE sy-tabix.

APPEND wa_itab TO itab.

lv_tabix = sy-tabix.
READ TABLE itab INTO wa_itab INDEX lv_tabix.
wa_itab-number1 = '1'.
MODIFY itab FROM wa_itab INDEX lv_tabix.

BREAK-POINT.