ABAP中的like和like行有什么区别？

Question

我有一个疑问.我可以知道ABAP LIKE与LIKE LINE OFABAP 之间的区别是什么？我在某个地方看到了宣布工作区域的声明.

wa LIKE it_one
wa LIKE LINE OF it_one

Answer 1

LIKE LINE OF 表示变量将是表格行类型.

LIKE 表示该变量与该关键字后面的变量完全相同.

例

TYPES: BEGIN OF t_my_example_structure,
    my_example_field1 TYPE i,
    my_example_field2 TYPE n,
  END OF t_my_example_structure.

TYPES tt_my_example_structure TYPE STANDARD TABLE OF t_my_example_structure.

DATA: l_tab_my_example TYPE tt_my_example_structure.

* has structure of row of l_tab_my_example so in this case t_my_example_structure.
DATA: l_str_my_example LIKE LINE OF l_tab_my_example.

* is exactly the same table type as l_tab_my_example so in this case tt_my_example_structure.
DATA: l_tab_like_my_example LIKE l_tab_my_example.

* I use it often for LOOP AT <tab> ASSIGNING <fs>.
FIELD-SYMBOLS: <fs_str_my_example> LIKE LINE OF l_tab_my_example.