我是 ABAP 的新手,我正在使用 FM 'REUSE_ALV_FIELDCATALOG_MERGE' 和 'REUSE_ALV_GRID_DISPLAY' 创建 ALV。
IT_MARD
当我使用过时的发生 0定义定义内部表时,它正在工作 。但是当我使用type standard table
. 您能否解释一下这两个定义之间的区别以及为什么它在后一种情况下不起作用。以下是代码。
REPORT ztest_fieldcatalog3.
TYPE-POOLS:slis.
*Semi Automatic Fieldcatalog Generation.
*DATA: BEGIN OF IT_MARD OCCURS 0,
* MATNR LIKE MARD-MATNR,
* WERKS LIKE MARD-WERKS, ""
* LGORT LIKE MARD-LGORT,
* PSTAT LIKE MARD-PSTAT,
* END OF IT_MARD.
TYPES: BEGIN OF ty_mard,
matnr type mard-matnr,
werks type mard-werks,
lgort type mard-lgort,
pstat type mard-pstat,
END OF ty_mard.
DATA: IT_MARD TYPE STANDARD TABLE OF ty_mard.
"Use function module create Fieldcat.
DATA:l_program TYPE sy-repid VALUE sy-repid.
DATA:i_fieldcat TYPE slis_t_fieldcat_alv.
SELECT matnr
werks
lgort
pstat
FROM mard
INTO CORRESPONDING FIELDS OF TABLE it_mard
UP TO 100 ROWS.
CALL FUNCTION 'REUSE_ALV_FIELDCATALOG_MERGE'
EXPORTING
i_program_name = l_program
i_internal_tabname = 'IT_MARD'
i_inclname = l_program
i_bypassing_buffer = 'X'
CHANGING
ct_fieldcat = i_fieldcat[].
IF sy-subrc <> 0.
MESSAGE ID sy-msgid TYPE sy-msgty NUMBER sy-msgno
WITH sy-msgv1 sy-msgv2 sy-msgv3 sy-msgv4.
ENDIF.
"Call ALV and pass fieldcatalog and data
CALL FUNCTION 'REUSE_ALV_GRID_DISPLAY'
EXPORTING
i_callback_program = l_program
it_fieldcat = i_fieldcat
TABLES
t_outtab = it_mard.
IF sy-subrc <> 0.
MESSAGE ID sy-msgid TYPE sy-msgty NUMBER sy-msgno
WITH sy-msgv1 sy-msgv2 sy-msgv3 sy-msgv4.
ENDIF.