继承CL_GUI_ALV_GRID类 types:beginofts_merge, begintypei, endtypei, endofts_merge. types:ty_t_mergetypetableofts_merge. types:beginofts_col_merge, rowtypei, col_mergetypety_t_merge, endofts_col_merge. types:ty_t_colmergetypetableofts_col_merge. types:beginofts_row_merge, coltypei, row_mergetypety...