５、样例代码及说明
TABLES SPFLI.
SELECT-OPTIONS S_CARR FOR SPFLI-CARRID.

TYPE-POOLS: RSDS, RSFS.

DATA: CALLBACK TYPE TABLE OF LDBCB,
　　    CALLBACK_WA LIKE LINE OF CALLBACK.

DATA: SELTAB TYPE TABLE OF RSPARAMS,
      SELTAB_WA LIKE LINE OF SELTAB.

DATA: TEXPR TYPE RSDS_TEXPR,
      FSEL  TYPE RSFS_FIELDS.

    *设置需要回调的数据节点和回调对应的子程序
    CALLBACK_WA-LDBNODE     = 'SPFLI'.
    CALLBACK_WA-GET         = 'X'.
    CALLBACK_WA-GET_LATE    = 'X'.
    CALLBACK_WA-CB_PROG     = SY-REPID.
    CALLBACK_WA-CB_FORM     = 'CALLBACK_SPFLI'.
    APPEND CALLBACK_WA TO CALLBACK.

    CLEAR CALLBACK_WA.
    CALLBACK_WA-LDBNODE     = 'SFLIGHT'.
    CALLBACK_WA-GET         = 'X'.
    CALLBACK_WA-CB_PROG     = SY-REPID.
    CALLBACK_WA-CB_FORM     = 'CALLBACK_SFLIGHT'.
    APPEND CALLBACK_WA TO CALLBACK.

    *设置对应的选择屏幕的参数的传入值
    SELTAB_WA-KIND = 'S'.
    SELTAB_WA-SELNAME = 'CARRID'.

    LOOP AT S_CARR.
    MOVE-CORRESPONDING S_CARR TO SELTAB_WA.
    APPEND SELTAB_WA TO SELTAB.
    ENDLOOP.

    *调用函数
CALL FUNCTION 'LDB_PROCESS'
     EXPORTING
          LDBNAME                     = 'F1S'
          VARIANT                     = ' '
          EXPRESSIONS                 = TEXPR
          FIELD_SELECTION             = FSEL
     TABLES
          CALLBACK                    = CALLBACK
          SELECTIONS                  = SELTAB
     EXCEPTIONS
          LDB_NOT_REENTRANT           = 1
          LDB_INCORRECT               = 2
          LDB_ALREADY_RUNNING         = 3
          LDB_ERROR                   = 4
          LDB_SELECTIONS_ERROR        = 5
          LDB_SELECTIONS_NOT_ACCEPTED = 6
          VARIANT_NOT_EXISTENT        = 7
          VARIANT_OBSOLETE            = 8
          VARIANT_ERROR               = 9
          FREE_SELECTIONS_ERROR       = 10
          CALLBACK_NO_EVENT           = 11
          CALLBACK_NODE_DUPLICATE     = 12
          OTHERS                      = 13.

IF SY-SUBRC <> 0.
  WRITE: 'Exception with SY-SUBRC', SY-SUBRC.
ENDIF.

*SPFLI节点对应的回调处理函数
FORM CALLBACK_SPFLI USING NAME  TYPE LDBN-LDBNODE
                          WA    TYPE SPFLI
                          EVT   TYPE C
                          CHECK TYPE C.
  CASE EVT.
   WHEN 'G'.
      WRITE: / WA-CARRID, WA-CONNID, WA-CITYFROM, WA-CITYTO.
      ULINE.
    WHEN 'L'.
      ULINE.
  ENDCASE.
ENDFORM.

*SFIGHT节点对应的回调处理函数
FORM CALLBACK_SFLIGHT USING NAME  TYPE LDBN-LDBNODE
                            WA    TYPE SFLIGHT
                            EVT   TYPE C
                            CHECK TYPE C.
  WRITE: / WA-FLDATE, WA-SEATSOCC, WA-SEATSMAX.
ENDFORM.

    注意：通过'LDB_PROCESS'函数访问逻辑数据库时，请不要在程序属性里绑定逻辑数据库，否则会出LDB_ALREADY_RUNNING错误。