直接修改内表某个字段值
gs_excel-aiab_msg = '模拟成功'. MODIFY gt_excel FROM gs_excel TRANSPORTING aiab_msg WHERE bukrs = <fs_head>-bukrs AND anln1 = <fs_head>-anln1 AND anln2 = <fs_head>-anln2.
gs_excel-aiab_msg = '模拟成功'. MODIFY gt_excel FROM gs_excel TRANSPORTING aiab_msg WHERE bukrs = <fs_head>-bukrs AND anln1 = <fs_head>-anln1 AND anln2 = <fs_head>-anln2.