创建动态内表

一、根据表名创建内表

1. 程序代码：

   "复杂方式
   SELECTION-SCREEN BEGIN OF BLOCK b1 WITH FRAME TITLE TEXT-001.
   PARAMETERS:p_tab TYPE string.
   SELECTION-SCREEN END OF BLOCK b1.
   
   DATA:lr_struct TYPE REF TO data,
        lr_table  TYPE REF TO data.
   FIELD-SYMBOLS:<fs_table>  TYPE ANY TABLE,
                 <fs_struct> TYPE any.
   "RTTS
   DATA(lo_struct) = CAST  cl_abap_structdescr( cl_abap_structdescr=>describe_by_name( p_tab ) ).
   DATA(lo_table) = cl_abap_tabledescr=>create( lo_struct ).
   "反射机制
   CREATE DATA lr_struct TYPE HANDLE lo_struct.
   CREATE DATA lr_table  TYPE HANDLE lo_table.
   "引用访问
   ASSIGN lr_struct->* TO <fs_struct>.
   ASSIGN lr_table->*  TO <fs_table>.
   
   "DATA(lv_where) =  'SPRAS EQ 1'.
   SELECT *
    FROM (p_tab)
    INTO TABLE @<fs_table>
      UP TO 10 ROWS.
   "WHERE (lv_where) .
   
   cl_demo_output=>display_data( <fs_table> ).
   
   “简单方式
   DATA:ref_table TYPE REF TO data.
   DATA:lv_where TYPE string.
   FIELD-SYMBOLS:<fs_table> TYPE ANY TABLE.
   
   PARAMETERS:p_tab TYPE dd02l-tabname OBLIGATORY DEFAULT 'TJ02T'.
   
   "创建表
   CREATE DATA ref_table TYPE TABLE OF (p_tab).
   ASSIGN ref_table->* TO <fs_table>.
   
   lv_where =  'SPRAS EQ 1'.
   SELECT *
    FROM (p_tab)
    INTO TABLE @<fs_table>
      UP TO 10 ROWS
   WHERE (lv_where) .
   
   cl_demo_output=>display_data( <fs_table> ).
   

2. 展示结果：

   
   

二、根据Fieldcat创建内表

1. 程序代码：

   *&---------------------------------------------------------------------*
   *& Report ZDMEO_001
   *&---------------------------------------------------------------------*
   *&
   *&---------------------------------------------------------------------*
   REPORT zdmeo_001.
   
   *&------------------------------------------------*
   *                alv陪ボ
   *&------------------------------------------------*
   DATA: gt_fcat TYPE lvc_t_fcat,
         gs_fcat TYPE lvc_s_fcat.
   DATA: gt_layo TYPE lvc_s_layo.
   DATA: gt_table TYPE REF TO data.
   
   FIELD-SYMBOLS:<fs_tab> TYPE ANY TABLE.
   FIELD-SYMBOLS: <fs_table> TYPE STANDARD TABLE,
                  <fs_wa>    TYPE any,
                  <fs_field> TYPE any.
   
   PERFORM frm_set_fcat."设置Fieldcat
   PERFORM frm_create_dynamic_tab."创建动态内表
   PERFORM frm_set_data."设置值
   PERFORM frm_insert_fcat."插入Fieldcat
   ASSIGN <fs_table> TO <fs_tab>."将动态内表1的数据复制到内表2
   PERFORM frm_create_dynamic_tab."创建动态内表
   MOVE-CORRESPONDING <fs_tab> TO <fs_table>."将值赋值回来
   PERFORM frm_set_data.
   BREAK-POINT.
   "设置Fieldcat
   FORM frm_create_row USING pv_name TYPE c
                                pv_row  TYPE i
                                pv_txt  TYPE c
                                pv_out  TYPE i
                                pv_edit TYPE c
                                pv_no_zero TYPE c
                                pv_tabname TYPE c.
     gs_fcat-fieldname = pv_name.
     gs_fcat-col_pos   = pv_row.
     gs_fcat-coltext   = pv_txt.
     gs_fcat-outputlen = pv_out.
     gs_fcat-edit      = pv_edit.
     gs_fcat-no_zero = pv_no_zero.
     gs_fcat-tabname = pv_tabname.
     APPEND gs_fcat TO gt_fcat.
     CLEAR: gs_fcat.
   ENDFORM. " FRM_CREATE_ROW
   
   FORM frm_create_dynamic_tab .
   *&------承笆篈ず---------
     CALL METHOD cl_alv_table_create=>create_dynamic_table
       EXPORTING
         it_fieldcatalog           = gt_fcat
       IMPORTING
         ep_table                  = gt_table
       EXCEPTIONS
         generate_subpool_dir_full = 1
         OTHERS                    = 2.
     IF sy-subrc = 0.
       CASE sy-subrc.
         WHEN 1.
         WHEN 2.
         WHEN OTHERS.
       ENDCASE.
     ENDIF.
     ASSIGN gt_table->* TO <fs_table>.
   ENDFORM.
   
   FORM frm_set_fcat .
     PERFORM frm_create_row USING  'ZBOX' 1 '' '' '' '' ''.
     PERFORM frm_create_row USING  'PBDNR' 2 TEXT-006  '10' '' 'X' 'PBIM'."
     PERFORM frm_create_row USING  'BERID' 3 TEXT-005  '10' '' 'X' ''."
     PERFORM frm_create_row USING  'Z_CUSNO' 4 TEXT-039  '10' '' 'X' ''."
     PERFORM frm_create_row USING  'KDMAT' 5 TEXT-013  '35' '' 'X' 'KNMT'."
     PERFORM frm_create_row USING  'MATNR' 6 TEXT-014  '18' '' 'X' 'MAKT'."
     PERFORM frm_create_row USING  'MAKTX' 7 TEXT-032  '40' '' 'X' 'MAKT'."
     PERFORM frm_create_row USING  'PLNMG' 8 TEXT-030  '15' '' 'X' ''."
     PERFORM frm_create_row USING  'PDATU' 9 TEXT-031  '6' '' 'X' ''."
   ENDFORM.
   
   FORM frm_insert_fcat .
     PERFORM frm_create_row USING  'C_RESULT' 2 TEXT-008 '1' '' '' ''."
     PERFORM frm_create_row USING  'Z_SIGN' 3 TEXT-036 '20' '' '' ''."
     PERFORM frm_create_row USING  'C_MESSAGE' 4 TEXT-009 '40' '' '' ''."
   ENDFORM.
   *&---------------------------------------------------------------------*
   *& Form frm_set_data
   *&---------------------------------------------------------------------*
   *& text
   *&---------------------------------------------------------------------*
   *& -->  p1        text
   *& <--  p2        text
   *&---------------------------------------------------------------------*
   FORM frm_set_data .
     DATA: lv_line TYPE REF TO data.
     CREATE DATA lv_line LIKE LINE OF <fs_table>.
     ASSIGN lv_line->* TO <fs_wa>.
   
     "给字段赋值.
     ASSIGN COMPONENT 'PBDNR' OF STRUCTURE <fs_wa> TO <fs_field>.
     CLEAR <fs_field>.
     <fs_field> = '12394'.
   
     APPEND <fs_wa> TO <fs_table>.
     CLEAR <fs_wa>.
   ENDFORM.
   

2. 执行结果：