LDB doubt

Question

REPORT  yjsample4                               .
tables : bsik, t001.
START-OF-SELECTION.
GET BSIK.
  IF bsik IS NOT INITIAL.
    APPEND bsik TO g_t_bsik.
  ENDIF.
END-OF-SELECTION.
  SELECT * FROM bsik INTO TABLE g_t_bsik1 WHERE lifnr IN kd_lifnr.
  LOOP AT g_t_bsik.
    cnt = cnt + 1.
    WRITE:/ cnt, g_t_bsik-bukrs, g_t_bsik-belnr.
  ENDLOOP.
In above program attributes please assign LDB name as KDF and keep break point at REPORT  yjsample4  . If we go through debugging mode it is going into three function modules and doing some validations and giving the records in output. which are not same if we select the same from   SELECT * FROM bsik INTO TABLE g_t_bsik1 WHERE lifnr IN kd_lifnr.
Can any body help me. What is happennig? I need to remove LDB(Avoiding LDB usage) and need to replace with SELECT statement...

Answer 1

Hi
KDF is Vendor Database.
Note
The report SAPDBKDF controls access to the vendor data base from a Financial Accounting point of view. Since the program only contains physical accesss routines for the logical data base, it cannot be started separately.
Technical documentation
In the standard system, a basic selection screen (screen number 1000) and 4 screen variants are delivered for the logical data base SAPDBKDF. The basic selection screen contains all available data base selections. If you make changes to data base selections (for example, defining a new selection parameter or extending the vendor number to 10 characters), then this screen is regenerated automatically by the system. It can then be used immediately by all reports that use the logical data base DDF. Screen variants are available in reporting by entering the screen number in the attributes.
Available fields
The available fields on a screen are indicated with an 'X'.
                  Selection screen variant
Field name          1000 900 901 902 903
Vendor number         X   X   X   X   X
Company code          X   X   X   X   X
Fiscal year           X   X   X   X
Key date of OIs       X   X
Clearing date         X       X
Table selection
In order to improve performance, individual tables can be excluded from selection. The following fields can be set in the application report at the time of INITIALIZATION or at the START OF SELECTION:
B0SG-XAGSL (blank as a default): if this field is set, then only A and B segments are read; in this case, only A segments for which there are no B segments are selected - this is normally not the case.
B0SG-XBNKL ('X' as a default): if this field is left blank, then the bank data is not read.
B0SG-XSTDL ('X' as a default): if this field is left blank, then the tax data is not read.
B0SG-XMNDL ('X' as a default): if this field is left blank, then the dunning data is not read.
Authorization checks
account type authorization (F_BKPF_KOA)
company code authorization (F_LFA1_BUK, F_BKPF_BUK)
account authorization (F_LFA1_BEK)