ABAP面试问题及侧重点

ABAP面试

1.简单的Report包括哪些东西

2.Dialog 逻辑流以及相应的处理内容

3.用过的几种增强方式：怎么找增强

4.接口和函数的使用，一般遇到自己不会的函数怎么处理

5.关联查询：INNER JOIN 与 LEFT JOIN 与 FOR ALL ENTRIES IN各用在什么情况

ABAP基础：报表，功能，增强，接口，数据处理及性能优化（不管内部还是外部，均需了解）

REPORT:1)数据定义；定义内表，结构，选择屏幕

2)数据处理；包括屏幕数据检查，数据查询，内表数据处理等

3)数据显示；定义字段目录，布局，特殊设置，CALL FM(习惯用REUSE_ALV_GRID_DISPLAY_LVC，LVC后期兼容和修改方便，也可以替代OO alv )

DIALOG:这是SAP的精华之一，不懂DIALOG，不入SAP门。

1)PBO;数据显示前处理，循环数据显示处理；循环之后无效修改和处理

2)PAI;表行，字段处理，更新表行；事件处理

增强：出口，BADI，隐式（常用的三种）；前两种可以用程序找（下篇文章），也可以找到程序对应的包，然后包里搜；隐式增强就是触发事件，DEBUG找地方加代码。

接口：就是查询，处理。。。都会的

查询：INNER 和LEFT，right是且与或的关系，确定都有的INNER,不确定有的，LEFT,RIGHT。文本表不建议关联，适合单独查。

FOR ALL ENTRIES IN使用前最好对关键字排重，非空检查；内表超过10万不建议使用。

常规的性能优化：先查，后处理，LOOP下面尽量不用SELECT和LOOP，READ TABLE 要二分法排序；内表查询确定字段以及顺序，CORRESPONDING FIELDS使用时字段不要多。

考的都是基本的东西，考学习面，学习深度，学习能力，以及对SAP的认识和自己的思维逻辑能力

附简单查询代码：凭证明细报表

*&---------------------------------------------------------------------*
*& Report  ZFIR025
*&
*&---------------------------------------------------------------------*
*&
*&DESC :凭证明细表
*
*&AUTHOR: LY
*&
*&DATE:20160721
*&
*&
*&CHANGE LIST
*&  C  DEVK901712            2016.07.21 08:11:04 LIYUAN
*&  C   DEVK901869            2016.08.22 15:37:14 LIYUAN 增加本币金额
*&---------------------------------------------------------------------*

REPORT ZFIR025.

TABLES:BKPF,BSEG,SKAT.

TYPES:BEGIN OF TY_SHOW,
        MONAT  TYPE BKPF-MONAT,
        BUDAT  TYPE BKPF-BUDAT,
        BELNR  TYPE BKPF-BELNR,
        BUKRS  TYPE BKPF-BUKRS,
        BKTXT  TYPE BKPF-BKTXT,
        GJAHR  TYPE BKPF-GJAHR,
        BLART  TYPE BKPF-BLART,
        WAERS  TYPE BKPF-WAERS,
        USNAM  TYPE BKPF-USNAM,
        AWKEY  TYPE BKPF-AWKEY,
        HKONT  TYPE BSEG-HKONT,
        KUNNR  TYPE BSEG-KUNNR,
        LIFNR  TYPE BSEG-LIFNR,
        KOSTL  TYPE BSEG-KOSTL,
        FKBER  TYPE BSEG-FKBER,
        WRBTR  TYPE BSEG-WRBTR,
        WRBTRS TYPE BSEG-WRBTR,
        WRBTRH TYPE BSEG-WRBTR,
        SHKZG  TYPE BSEG-SHKZG,
        MATNR  TYPE BSEG-MATNR,
        XNEGP  TYPE BSEG-XNEGP,
        RSTGR  TYPE BSEG-RSTGR, "原因代码
        TXT40  TYPE T053S-TXT40, "原因代码文本
        LTEXT  TYPE CSKT-LTEXT, "成本中心文本
        DMBTR  TYPE BSEG-DMBTR,
        DMBTRS TYPE BSEG-DMBTR,
        DMBTRH TYPE BSEG-DMBTR,
        TXT50  TYPE SKAT-TXT50,
        GSBER  TYPE BSEG-GSBER,
      END OF TY_SHOW,
      BEGIN OF TY_T053S,
        RSTGR TYPE BSEG-RSTGR, "原因代码
        BUKRS TYPE BSEG-BUKRS, "原因代码
        TXT40 TYPE T053S-TXT40, "原因代码文本
      END OF TY_T053S,
      BEGIN OF TY_CSKT,
        KOSTL TYPE BSEG-KOSTL, "原因代码
        LTEXT TYPE CSKT-LTEXT, "原因代码文本
      END OF TY_CSKT.

DATA:GT_SHOW TYPE TABLE OF TY_SHOW,
     GW_SHOW LIKE LINE OF GT_SHOW,
     GT_T053 TYPE TABLE OF TY_T053S,
     GW_T053 LIKE LINE OF GT_T053,
     GT_CSKT TYPE TABLE OF TY_CSKT,
     GW_CSKT LIKE LINE OF GT_CSKT.

DATA:GT_FIELDCAT TYPE LVC_T_FCAT.
DATA GS_FIELDCAT LIKE LINE OF GT_FIELDCAT.
DATA LS_LAYOUT TYPE LVC_S_LAYO.

DEFINE APPEND_FIELDCAT .
  CLEAR GS_FIELDCAT.
  GS_FIELDCAT-FIELDNAME = &.
  GS_FIELDCAT-SCRTEXT_L = &.
  GS_FIELDCAT-OUTPUTLEN = &.
  GS_FIELDCAT-NO_ZERO = &.
  APPEND GS_FIELDCAT TO GT_FIELDCAT.
END-OF-DEFINITION.

SELECTION-SCREEN:BEGIN OF BLOCK BLK01 WITH FRAME TITLE TEXT-.
SELECT-OPTIONS:S_BUKRS FOR BKPF-BUKRS DEFAULT ''.
SELECT-OPTIONS:S_GJAHR FOR BKPF-GJAHR DEFAULT SY-DATUM+().
SELECT-OPTIONS:S_MONAT FOR BKPF-MONAT DEFAULT SY-DATUM+().
SELECT-OPTIONS:S_BELNR FOR BKPF-BELNR.
SELECT-OPTIONS:S_HKONT FOR BSEG-HKONT.
SELECT-OPTIONS:S_KUNNR FOR BSEG-KUNNR.
SELECT-OPTIONS:S_LIFNR FOR BSEG-LIFNR.
SELECT-OPTIONS:S_KOSTL FOR BSEG-KOSTL.
SELECT-OPTIONS:S_BLART FOR BKPF-BLART.
SELECT-OPTIONS:S_BUDAT FOR BKPF-BUDAT.
SELECT-OPTIONS:S_GSBER FOR BSEG-GSBER.
SELECTION-SCREEN END OF BLOCK BLK01.

START-OF-SELECTION.
  PERFORM PRM_GET_DATA.
  PERFORM PRM_PROCE_DATA.
  PERFORM PRM_SET_FIELD.
  PERFORM PRM_SHOW.

*&---------------------------------------------------------------------*
*&      Form  PRM_GET_DATA
*&---------------------------------------------------------------------*
*       text
*----------------------------------------------------------------------*
*  -->  p1        text
*  <--  p2        text
*----------------------------------------------------------------------*
FORM PRM_GET_DATA .
  SELECT
          BKPF~MONAT"  TYPE BKPF-MONAT,
          BKPF~BUDAT"  TYPE BKPF-BUDAT,
          BKPF~BELNR"  TYPE BKPF-BELNR,
          BKPF~BUKRS"  TYPE BKPF-BUKRS,
          BKPF~BKTXT"  TYPE BKPF-BKTXT,
          BKPF~GJAHR"  TYPE BKPF-GJAHR,
          BKPF~BLART"  TYPE BKPF-BLART,
          BKPF~WAERS"  TYPE BKPF-WAERS,
          BKPF~USNAM"  TYPE BKPF-USNAM,
          BKPF~AWKEY"  TYPE BKPF-USNAM,
          BSEG~HKONT"  TYPE BSEG-HKONT,
          BSEG~KOSTL"  TYPE BSEG-HKONT,
          BSEG~KUNNR"  TYPE BSEG-HKONT,
          BSEG~LIFNR"  TYPE BSEG-HKONT,
          BSEG~FKBER"  TYPE BSEG-HKONT,
          BSEG~WRBTR"  TYPE BSEG-WRBTR,
          BSEG~MATNR"  TYPE BSEG-WRBTR,
          BSEG~SHKZG"  TYPE BSEG-WRBTR,
          BSEG~XNEGP"  TYPE BSEG-WRBTR,
          BSEG~RSTGR"  TYPE BSEG-RSTGR,
          BSEG~DMBTR
          SKAT~TXT50"  TYPE SKAT-TXT50,
          BSEG~GSBER
    INTO CORRESPONDING FIELDS OF TABLE GT_SHOW
    FROM BKPF
    INNER JOIN BSEG
    ON BKPF~BUKRS = BSEG~BUKRS
    AND BKPF~BELNR = BSEG~BELNR
    INNER JOIN SKAT
    ON BSEG~HKONT = SKAT~SAKNR
    AND SKAT~SPRAS = ''
    AND SKAT~KTOPL = ''
    WHERE BKPF~BUKRS IN S_BUKRS
    AND   BKPF~GJAHR IN S_GJAHR
    AND   BKPF~MONAT IN S_MONAT
    AND   BKPF~BELNR IN S_BELNR
    AND   BSEG~HKONT IN S_HKONT
    AND   BSEG~KUNNR IN S_KUNNR
    AND   BSEG~LIFNR IN S_LIFNR
    AND   BSEG~KOSTL IN S_KOSTL
    AND   BSEG~GSBER IN S_GSBER
    AND   BKPF~BLART IN S_BLART
    AND   BKPF~BUDAT IN S_BUDAT.

  IF GT_SHOW[] IS INITIAL.
    MESSAGE '无结果！' TYPE 'S' DISPLAY LIKE 'E'.
    LEAVE LIST-PROCESSING.
  ELSE.
    SELECT * INTO CORRESPONDING FIELDS OF TABLE GT_T053
      FROM T053S WHERE SPRAS = ''.

    SELECT * INTO CORRESPONDING FIELDS OF TABLE GT_CSKT
      FROM CSKT WHERE SPRAS = '' AND KOKRS = ''.
  ENDIF.
ENDFORM.
*&---------------------------------------------------------------------*
*&      Form  PRM_PROCE_DATA
*&---------------------------------------------------------------------*
*       text
*----------------------------------------------------------------------*
*  -->  p1        text
*  <--  p2        text
*----------------------------------------------------------------------*
FORM PRM_PROCE_DATA .
  DATA:GS_SHOW LIKE LINE OF GT_SHOW.

*  SORT GT_SHOW BY BUKRS GJAHR BELNR KUNNR DESCENDING LIFNR DESCENDING." HKONT DESCENDING.

  LOOP AT GT_SHOW INTO GW_SHOW.
*    IF GW_SHOW-XNEGP = 'X'.
*      GW_SHOW-DMBTR = GW_SHOW-DMBTR * -1.
*    ENDIF.
    IF GW_SHOW-HKONT = '' AND GW_SHOW-LIFNR IS INITIAL."应付暂估 带出供应商
      SELECT SINGLE LIFNR INTO GW_SHOW-LIFNR FROM BSEG WHERE BUKRS = GW_SHOW-BUKRS AND BELNR = GW_SHOW-BELNR AND GJAHR = GW_SHOW-GJAHR AND LIFNR <> ''.
    ENDIF.

    IF GW_SHOW-HKONT = '' AND GW_SHOW-KUNNR IS INITIAL."应付暂估 带出供应商
      SELECT SINGLE KUNNR INTO GW_SHOW-KUNNR FROM BSEG WHERE BUKRS = GW_SHOW-BUKRS AND BELNR = GW_SHOW-BELNR AND GJAHR = GW_SHOW-GJAHR AND KUNNR <> ''.
    ENDIF.
    IF GW_SHOW-SHKZG = 'S'.
      IF GW_SHOW-XNEGP = 'X'.
        GW_SHOW-DMBTRH = GW_SHOW-DMBTR.
        GW_SHOW-WRBTRH = GW_SHOW-WRBTR.
      ELSE.
        GW_SHOW-DMBTRS = GW_SHOW-DMBTR.
        GW_SHOW-WRBTRS = GW_SHOW-WRBTR.
      ENDIF.
*      GW_SHOW-DMBTRS = GW_SHOW-DMBTR.
    ELSEIF GW_SHOW-SHKZG = 'H'.

      IF GW_SHOW-XNEGP = 'X'.
        GW_SHOW-DMBTRS = GW_SHOW-DMBTR * -.
        GW_SHOW-WRBTRS = GW_SHOW-WRBTR * -.
      ELSE.
        GW_SHOW-DMBTRH = GW_SHOW-DMBTR * -.
        GW_SHOW-WRBTRH = GW_SHOW-WRBTR * -.
      ENDIF.

      GW_SHOW-DMBTR = GW_SHOW-DMBTR * -.
      GW_SHOW-WRBTR = GW_SHOW-WRBTR * -.
*      GW_SHOW-DMBTRH = GW_SHOW-DMBTR.
    ENDIF.

    READ TABLE GT_T053 INTO GW_T053 WITH KEY BUKRS = GW_SHOW-BUKRS RSTGR = GW_SHOW-RSTGR.
    IF SY-SUBRC = .
      GW_SHOW-TXT40 = GW_T053-TXT40.
    ENDIF.

    READ TABLE GT_CSKT INTO GW_CSKT WITH KEY KOSTL = GW_SHOW-KOSTL.
    IF SY-SUBRC = .
      GW_SHOW-LTEXT = GW_CSKT-LTEXT.
    ENDIF.

    MODIFY GT_SHOW FROM GW_SHOW.
    CLEAR:GW_SHOW.
  ENDLOOP.
ENDFORM.
*&---------------------------------------------------------------------*
*&      Form  PRM_SET_FIELD
*&---------------------------------------------------------------------*
*       text
*----------------------------------------------------------------------*
*  -->  p1        text
*  <--  p2        text
*----------------------------------------------------------------------*
FORM PRM_SET_FIELD .
  REFRESH GT_FIELDCAT.
  LS_LAYOUT-CWIDTH_OPT    = 'X'. "优化列宽选项是否设置
  LS_LAYOUT-ZEBRA                = 'X'.
*  ls_layout-box_fname        = 'SEL'.
  APPEND_FIELDCAT:'BUKRS'             '公司代码'                 'X',
                  'GJAHR'             '会计年度'                 'X',
                  'MONAT'             '会计期间'                 'X',
                  'BUDAT'             '过账日期'                 '',
                  'BELNR'             '凭证编号'                'X',
                  'AWKEY'             '凭证参考'                'X',
                  'BKTXT'             '摘要'                      '',
                  'HKONT'             '科目代码'                  'X',
                  'TXT50'             '科目名称'                  '',
                  'KUNNR'             '客户编号'                  '',
                  'LIFNR'             '供应商编号'                '',
                  'FKBER'             '功能范围'                  '',
                  'GSBER'             '业务范围'                  '',
                  'WAERS'             '币别'                      '',
                  'KOSTL'             '成本中心'                  'X',
                  'LTEXT'             '成本中心描述'              '',
                  'MATNR'             '物料编码'                  'X',
                  'RSTGR'             '原因代码'                   '',
                  'TXT40'             '原因代码描述'               '',
                  'WRBTR'             '原币金额'                  '',
                  'WRBTRS'            '原币借方金额'              '',
                  'WRBTRH'            '原币贷方金额'              '',
                  'DMBTR'             '本币金额'                  '',
                  'DMBTRS'            '本币借方金额'              '',
                  'DMBTRH'            '本币贷方金额'              '',
                  'USNAM'             '制单人'                    ''.
ENDFORM.
*&---------------------------------------------------------------------*
*&      Form  PRM_SHOW
*&---------------------------------------------------------------------*
*       text
*----------------------------------------------------------------------*
*  -->  p1        text
*  <--  p2        text
*----------------------------------------------------------------------*
FORM PRM_SHOW .
  DATA:LV_TITLE TYPE LVC_TITLE.

  DESCRIBE TABLE GT_SHOW LINES LV_TITLE.
  CONDENSE LV_TITLE NO-GAPS.

  CONCATENATE '结果共' LV_TITLE '条目！' INTO LV_TITLE.

  CALL FUNCTION 'REUSE_ALV_GRID_DISPLAY_LVC'
    EXPORTING
      I_CALLBACK_PROGRAM       = SY-REPID
      I_CALLBACK_PF_STATUS_SET = 'PRM_SET_STATUS'
      I_CALLBACK_USER_COMMAND  = 'PRM_USER_COMMAND'
      IS_LAYOUT_LVC            = LS_LAYOUT
      IT_FIELDCAT_LVC          = GT_FIELDCAT[]
      I_GRID_TITLE             = LV_TITLE
      I_DEFAULT                = 'X'
      I_SAVE                   = 'A'
    TABLES
      T_OUTTAB                 = GT_SHOW
    EXCEPTIONS
      PROGRAM_ERROR            =
      OTHERS                   = .
  IF SY-SUBRC <> .
  ENDIF.
ENDFORM.
FORM PRM_SET_STATUS USING RT_EXTAB TYPE SLIS_T_EXTAB.
  SET PF-STATUS 'ZSTAT'.
ENDFORM.
FORM PRM_USER_COMMAND USING P_UCOMM    LIKE SY-UCOMM
                        P_SELFIELD TYPE SLIS_SELFIELD.

  CHECK P_UCOMM = '&IC1'.

  READ TABLE GT_SHOW INTO GW_SHOW INDEX P_SELFIELD-TABINDEX.
  IF SY-SUBRC = .
    SET PARAMETER ID 'BLN' FIELD GW_SHOW-BELNR.
    SET PARAMETER ID 'BUK' FIELD GW_SHOW-BUKRS.
    SET PARAMETER ID 'GJR' FIELD GW_SHOW-GJAHR.

    CALL TRANSACTION 'FB03' AND SKIP FIRST SCREEN.
  ENDIF.
ENDFORM.