ABAP动态内表运用

     REPORT  ztest.  
      
    DATA: BEGIN OF wa_ets,  
          vbeln     LIKE lips-vbeln,  
          posnr     LIKE lips-posnr,  
    END OF wa_ets.  
      
    DATA:  
         l_fname    LIKE dd03l-fieldname,  
         typedesr   TYPE REF TO cl_abap_typedescr,  
         gt_comp    TYPE cl_abap_structdescr=>component_table,  
         gs_comp    LIKE LINE OF gt_comp,  
         is_comp    TYPE abap_componentdescr,  
         it_comp    TYPE abap_component_tab,  
         cl_stru    TYPE REF TO cl_abap_structdescr,  
         c2_stru    TYPE REF TO cl_abap_structdescr,  
         cl_tabl    TYPE REF TO cl_abap_tabledescr,  
         c2_tabl    TYPE REF TO cl_abap_tabledescr,  
         cl_handle  TYPE REF TO data,  
         c2_handle  TYPE REF TO data,  
         cl_st      TYPE REF TO data,  
         c2_st      TYPE REF TO data,  
         c3_st      TYPE REF TO data,  
         key        TYPE abap_keydescr_tab.  
      
    FIELD-SYMBOLS: <gt_itab>    TYPE ANY TABLE ,  
                   <it_itab>    TYPE ANY TABLE ,  
                   <fs1>        TYPE ANY,  
                   <fs2>,  
                   <fs3>,  
                   <fs4>,  
                   <fs5>,  
                   <gs_struc>   TYPE ANY.  
      
      DATA: BEGIN OF gt_field OCCURS 0,  
         kopos(2)    TYPE n,  
         fieldname   LIKE dd03l-fieldname,  
         rollname    LIKE dd03l-rollname,  
         ref_table   LIKE dd03l-tabname,  
         ref_field   LIKE dd03l-fieldname,  
         key         TYPE c,  
      END OF gt_field.  
    **  
      DATA: it_field LIKE STANDARD TABLE OF gt_field WITH HEADER LINE.  
      
      gt_field-fieldname  = 'VBELN'.  
      gt_field-rollname   = 'VBELN_VL'.  
      gt_field-ref_table  = 'LIPS'.  
      gt_field-ref_field  = 'VBELN'.  
      APPEND gt_field.  
      MOVE gt_field   TO it_field.  
      APPEND it_field.  
      
      gt_field-fieldname  = 'POSNR'.  
      gt_field-rollname   = 'POSNR_VL'.  
      gt_field-ref_table  = 'LIPS'.  
      gt_field-ref_field  = 'POSNR'.  
      APPEND gt_field.  
      CLEAR gt_field.  
      gt_field-fieldname  = 'BRGEW'.  
      gt_field-rollname   = 'GSGEW'.  
      gt_field-ref_table  = 'LIPS'.  
      gt_field-ref_field  = 'BRGEW'.  
      APPEND gt_field.  
      MOVE gt_field   TO it_field.  
      APPEND it_field.  
      gt_field-fieldname  = 'VOLUM'.  
      gt_field-rollname   = 'VOLUM'.  
      gt_field-ref_table  = 'LIPS'.  
      gt_field-ref_field  = 'VOLUM'.  
      APPEND gt_field.  
      MOVE gt_field   TO it_field.  
      APPEND it_field.  
      .  
      LOOP AT gt_field.  
        CLEAR: gs_comp, l_fname.  
        CLEAR l_fname.  
        CONCATENATE gt_field-ref_table '-' gt_field-ref_field INTO l_fname.  
        is_comp-name   = gt_field-fieldname.  
        "is_comp-type  ?= cl_abap_elemdescr=>describe_by_name( gt_field-rollname ).  
        is_comp-type  ?= cl_abap_datadescr=>describe_by_name( l_fname ).  
        APPEND is_comp  TO it_comp.  
      ENDLOOP.  
      cl_stru = cl_abap_structdescr=>create( it_comp ).  
    **  
      APPEND 'VBELN' TO key.  
      cl_tabl = cl_abap_tabledescr=>create( p_line_type  = cl_stru  
                                            p_table_kind = cl_abap_tabledescr=>tablekind_sorted  
                                           " p_unique     = abap_true  
                                            p_key        = key ).  
      APPEND 'POSNR' TO key.  
      c2_tabl = cl_abap_tabledescr=>create( p_line_type  = cl_stru  
                                            p_table_kind = cl_abap_tabledescr=>tablekind_hashed  
                                            p_unique     = abap_true  
                                            p_key        = key ).  
      CREATE DATA cl_handle TYPE HANDLE cl_tabl.  
      CREATE DATA c2_handle TYPE HANDLE c2_tabl.  
      CREATE DATA cl_st     TYPE HANDLE cl_stru.  
      CREATE DATA c2_st     TYPE HANDLE cl_stru.  
      CREATE DATA c3_st     TYPE HANDLE cl_stru.  
      ASSIGN cl_handle->*   TO <gt_itab>.  
      ASSIGN c2_handle->*   TO <it_itab>.  
      ASSIGN cl_st->*       TO <fs1>.  
      ASSIGN c2_st->*       TO <fs3>.  
      ASSIGN c3_st->*       TO <fs5>.  
      
      ASSIGN COMPONENT 'VBELN' OF STRUCTURE <fs1> TO <fs2>.  
      <fs2> = '0080021838'.  
      ASSIGN COMPONENT 'POSNR' OF STRUCTURE <fs1> TO <fs2>.  
      <fs2> = '000030'.  
    **  
      SELECT * FROM lips  
               INTO CORRESPONDING FIELDS OF TABLE <gt_itab> UP TO 10 ROWS  
               ORDER BY vbeln posnr.  
      LOOP AT <gt_itab> INTO <fs3>.  
        ASSIGN COMPONENT 'POSNR' OF STRUCTURE <fs3> TO <fs4>.  
        CLEAR <fs4>.  
        COLLECT <fs3> INTO <it_itab>.  
      ENDLOOP.  
      DELETE ADJACENT DUPLICATES FROM <gt_itab>.  
      READ TABLE <gt_itab> FROM <fs1> TRANSPORTING NO FIELDS.  
      IF sy-subrc = 0.  
        WRITE:/ 'SSSS'.  
      ENDIF.  
      c2_stru ?= cl_abap_structdescr=>describe_by_data( wa_ets ).  
      gt_comp = c2_stru->get_components( ).