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关于创建动态内表

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https://www.cnblogs.com/jiangzhengjun/p/4264644.html 看了阁下这篇博文,亲自试了一下,创建动态内表的时候,反射出来的动态内表字段长度翻倍了。代码36 37行经打断点发现出了问题。麻烦看到时给个回复,谢谢。

 1 *&---------------------------------------------------------------------*
 2 *& Report  ZCHENH022
 3 *&
 4 *&---------------------------------------------------------------------*
 5 *&
 6 *&
 7 *&---------------------------------------------------------------------*
 8 
 9 REPORT zchenh022.
10 TYPE-POOLS:   abap.
11 FIELD-SYMBOLS:<dyn_table> TYPE STANDARD TABLE,
12               <dyn_wa>,
13               <dyn_field>.
14 DATA: dy_table TYPE REF TO data,
15       dy_line  TYPE REF TO data,
16       xfc      TYPE        lvc_s_fcat,
17       ifc      TYPE        lvc_t_fcat.
18 SELECTION-SCREEN BEGIN OF BLOCK b1 WITH FRAME.
19 PARAMETERS: p_table(30)  TYPE c DEFAULT 'T001'.
20 SELECTION-SCREEN END OF BLOCK b1.
21 
22 START-OF-SELECTION.
23   PERFORM get_structure.
24   PERFORM create_dynamic_itab.
25   PERFORM get_data.
26   PERFORM write_out.
27 *&--------------------------------------------------------------------*
28 *&      Form  get_structure
29 *&--------------------------------------------------------------------*
30 *       text
31 *---------------------------------------------------------------------*
32 FORM get_structure.
33   DATA: idetails      TYPE        abap_compdescr_tab,
34         xdetails      TYPE        abap_compdescr.
35   DATA: ref_table_des TYPE REF TO cl_abap_structdescr.
36   ref_table_des ?= cl_abap_typedescr=>describe_by_name( p_table ).
37 
38   idetails[] = ref_table_des->components[].
39   LOOP AT idetails INTO xdetails.
40     CLEAR xfc.
41     xfc-fieldname = xdetails-name.
42     xfc-datatype  = xdetails-type_kind.
43     xfc-inttype   = xdetails-type_kind.
44     xfc-intlen    = xdetails-length.
45     xfc-decimals  = xdetails-decimals.
46     APPEND xfc TO ifc.
47   ENDLOOP.
48 ENDFORM.                    "get_structure
49 *&--------------------------------------------------------------------*
50 *&      Form  create_dynamic_itab
51 *&--------------------------------------------------------------------*
52 *       text
53 *---------------------------------------------------------------------*
54 FORM create_dynamic_itab.
55   CALL METHOD cl_alv_table_create=>create_dynamic_table
56     EXPORTING
57       it_fieldcatalog = ifc
58     IMPORTING
59       ep_table        = dy_table.
60   ASSIGN dy_table->* TO <dyn_table>.
61   CREATE DATA dy_line LIKE LINE OF <dyn_table>.
62   ASSIGN dy_line->* TO <dyn_wa>.
63 ENDFORM.                    "create_dynamic_itab
64 *&--------------------------------------------------------------------*
65 *&      Form  get_data
66 *&--------------------------------------------------------------------*
67 *       text
68 *---------------------------------------------------------------------*
69 FORM get_data.
70   SELECT * INTO TABLE <dyn_table> FROM (p_table).
71 ENDFORM.                    "get_data
72 *&--------------------------------------------------------------------*
73 *&      Form  write_out
74 *&--------------------------------------------------------------------*
75 *       text
76 *---------------------------------------------------------------------*
77 FORM write_out.
78   LOOP AT <dyn_table> INTO <dyn_wa>.
79     DO.
80       ASSIGN COMPONENT sy-index OF STRUCTURE <dyn_wa> TO <dyn_field>.
81       IF sy-subrc <> 0.
82         EXIT.
83       ENDIF.
84       IF sy-index = 1.
85         WRITE:/ <dyn_field>.
86       ELSE.
87         WRITE: <dyn_field>.
88       ENDIF.
89     ENDDO.
90   ENDLOOP.
91 ENDFORM.                    "write_out
Lovemywx2的主页 Lovemywx2 | 菜鸟二级 | 园豆:202
提问于:2018-05-30 13:47
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所有回答(1)
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字段长度翻倍是啥意思?

ref_table_des->components[].这个修改成这个试试,我没有这样直接取它的成员变量,我一般是这样用的:

ref_table_des->get_components( ).

江正军 | 园豆:202 (菜鸟二级) | 2018-05-30 20:37

字段长度翻倍的意思是:代码的第44行: xfc-intlen = xdetails-length. 这个反射出来的长度与数据库底表中的长度不同,阁下可以试试。

支持(0) 反对(0) Lovemywx2 | 园豆:202 (菜鸟二级) | 2018-09-25 14:06
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