1、1SAP動態內表與動態SQL技術動態內表的創建2當程序運行時才能確定內表的結構，我們就需要用到動態內表。動態內表的創建一般有兩種方法：1. 使用類CL_ALV_TABLE_CREATE的方法CREATE_DYNAMIC_TABLE；2. 使用RTTI(Run Time Type Services)：CL_ABAP_TABLEDESCRCL_ALV_TABLE_CREATE3使用CL_ALV_TABLE_CREATE創建動態內表：1. 定義動態內表的數據類型type-pools: slis. field-symbols: type standard table, ” 內表指針 , ” 工作區 .

2、 ” 字段data: dy_table type ref to data, dy_line type ref to data, ” 行 wa_fcat type lvc_s_fcat, ” 列結構 it_fcat type lvc_t_fcat. CL_ALV_TABLE_CREATE42. 定義列結構動態內表表結構的定義必須使用表結構與tabletype:lvc_t_fcat一樣的內表.clear wa_fcat. wa_fcat-fieldname = MATNR. wa_fcat-datatype =CHAR. wa_fcat-intlen = 18. append wa_fcat to

3、 it_fcat. clear wa_fcat. wa_fcat-fieldname = MAKTX. wa_fcat-datatype = CHAR. wa_fcat-intlen = 40. append wa_fcat to it_fcat. CL_ALV_TABLE_CREATE53. 創建內表call method cl_alv_table_create=create_dynamic_table exporting it_fieldcatalog = it_fcat importing ep_table = dy_table. assign dy_table-* to . creat

4、e data dy_line like line of . assign dy_line-* to .動態內表的操作6獲取內表的行指針；獲取指定的字段；讀/寫指定字段的值；read table assigning index 1.if sy-subrc = 0. assign component MATNR of structure to . if sy-subrc = 0. write:/ . endif.endif.RTTI7定義數據類型DATA: CL_STRUTYPE REF TO CL_ABAP_STRUCTDESCR, CL_TABL TYPE REF TO CL_ABAP_TAB

5、LEDESCR, CL_HANDLE TYPE REF TO DATA, WA_COMPONENTS TYPE ABAP_COMPONENTDESCR, IT_COMPONENTS TYPE ABAP_COMPONENT_TAB.DATA: IT_CELLSTABTYPE LVC_T_STYL, WA_CELLSTABTYPE LVC_S_STYL.FIELD-SYMBOLS: TYPE STANDARD TABLE , TYPE ANY, TYPE LVC_T_STYL.使用cl_alv_table_create=create_dynamic_table動態創建內表的時候，如果是Deep S

6、tructure的結構的內表，程序Dump。這時就需要使用RTTI來創建。RTTI82. 定義列結構CLEAR: COMPDESC.WA_COMPONENTS-TYPE ?= CL_ABAP_DATADESCR=DESCRIBE_BY_NAME( EKPO-MATNR ).WA_COMPONENTS-NAME = MATNR.APPEND WA_COMPONENTS TO IT_COMPONENTS.WA_COMPONENTS-TYPE ?= CL_ABAP_DATADESCR=DESCRIBE_BY_NAME( EKPO-MENGE ).WA_COMPONENTS-NAME = MENGE.

7、APPEND WA_COMPONENTS TO IT_COMPONENTS.WA_COMPONENTS-TYPE ?= CL_ABAP_TYPEDESCR=DESCRIBE_BY_DATA( CELLSTAB ).WA_COMPONENTS-NAME = CELLSTAB.APPEND WA_COMPONENTS TO IT_COMPONENTS.RTTI93. 創建內表CL_STRU = CL_ABAP_STRUCTDESCR=CREATE( COMPONENTS ).CL_TABL= CL_ABAP_TABLEDESCR=CREATE( CL_STRU ).CREATE DATA CL_H

8、ANDLE TYPE HANDLE CL_TABL.ASSIGN CL_HANDLE-* TO .4. 操作SELECT * FROM ekpo INTO CORRESPONDING FIELDS OF TABLE UP TO 10 ROWS.WA_CELLSTAB-FIELDNAME = MENGE.WA_CELLSTAB-STYLE = CL_GUI_ALV_GRID=MC_STYLE_ENABLED.INSERT WA_CELLSTAB INTO TABLE IT_CELLSTAB.LOOP AT ASSIGNING .ASSIGN COMPONENT CELLSTAB OF STRUCTURE TO . = IT_CELLSTAB.ENDLOOP.動態SQL10SELECT (column_s