ABAP Help Document(6):2.1ABAP程序类型

2.Program structure

2.1ABAP程序类型

1. Executable program，可执行程序，使用SUBMIT,dynpro,使用Tcode执行selection screen,不能再Function Module中使用；

2. Class pool，类，使用Call，只能在Method中使用；

3. Function group or function pool，使用CALL FUNCTION执行；

4. Interface pool，接口；

5. Module pool，使用Tcode执行的dynpro；

6. Subroutine pool，子程序；

7. Type group or type pool，数据类型；

程序类型声明

1. REPORT；

2.PROGRAM;

3.FUNCTION POOL;

4.CLASS POOL;

5.INTERFACE POOL;

6. TYPE POOL;

示例1：

"function pool
FORM f_program_type_function.
  "Function Group
  "Function Pool命名规则
  "LXXXTOP,定义数据
  "LXXXDxx,定义本地class
  "LXXXUxx,function module实现；
  "LXXXPxx,本地class,method实现；
  "LXXXOxx,PBOmodule;
  "LXXXIxx,PAImodule;
  "LXXXExx,Event block;
  "LXXXFxx,子程序subroutine;
    
* Function group SAPLABAP_DOCU is structured from include programs. 
*
* *&---------------------------------------------------------------------* 
**&  Function Group SAPLABAP_DOCU 
**&---------------------------------------------------------------------* 
*
*INCLUDE labap_docutop.               " Global Declarations 
*
*INCLUDE labap_docue00.               " Load of Program 
*
*INCLUDE labap_docuuxx.               " Function Modules 
*
*INCLUDE labap_docuo01.               " PBO Modules 
*
*INCLUDE labap_docui01.               " PAI Modules 
*
*INCLUDE labap_docue01.               " Handling of Runtime-Events</ 
*
*INCLUDE labap_docup01.               " Class implementations 
*INCLUDE labap_docup02. 
*INCLUDE labap_docup03. 
*INCLUDE labap_docup04.  
*
*The function group includes the top include in the first place; it contains the FUNCTION-POOL statement and other include programs for data and class declarations: 
*
* *&---------------------------------------------------------------------* 
**&  Include           LABAP_DOCUTOP 
**&---------------------------------------------------------------------* 
*
*FUNCTION-POOL abap_docu. 
*
*INCLUDE labap_docud00.               " Global Data for Screens 
*
*INCLUDE labap_docud01.               " Classes for Docu Display 

ENDFORM.

示例2：

"程序类型
FORM f_program_type_report.
  "Report程序
  "语法:
*  REPORT rep [list_options]
*           [MESSAGE-ID mid]
*           [DEFINING DATABASE ldb]
*           [REDUCED FUNCTIONALITY].
  "[list_options]
  "[NO STANDARD PAGE HEADING],系统变量：sy-wtitl = 'N'；
  "[LINE-SIZE width],系统变量：sy-linsz,最大值1023，默认为0；
  "[LINE-COUNT page_lines[(footer_lines)]]，系统变量：sy-linct，0~60000；
  "示例：REPORT z_report LINE-COUNT 65(8) LINE-SIZE 132.

  "DEFINING DATABASE ldb
  "定义逻辑数据库
  "MESSAGE-ID mid
  "message id,指定程序使用message,message class表:T100
  "REDUCED FUNCTIONALITY ,只用于subroutine pools，应用于PROGRAM

  "Program程序
  "语法：
*  PROGRAM prog [list_options]
*             [MESSAGE-ID mid]
*             [REDUCED FUNCTIONALITY].
  "[list_options]忽略，[REDUCED FUNCTIONALITY]只在subroutine pools有效

ENDFORM.

示例3：

"语法：
  "CLASS-POOL [MESSAGE-ID id]. 
  
  "语法：
  "INTERFACE-POOL.

示例4：

  "语法：
  "TYPE-POOL tpool.