BDC is a method for transfer data in SAP. Data that you want it to be operated by BCD must have structure as bellows:

BDCDATA Structure

Field Name     Type        Description
PROGRAM        CHAR(40)    Program Name
DYNPRO         NUMC(4)     Screen No.
DYNBEGIN       CHAR(1)     Begin a screen (If yes then equal ’X’)
FNAM           CHAR(132)   Field Name
FVAL           CHAR(132)   Field Value

If you want to operate work area with internal table, you can operate follow on below statements:

• APPEND Statement: If you want to append work area to internal table, you can apply this statement.
  Example

DATA: lw_bkpf LIKE BKPF,
      it_bkpf TYPE TABLE OF BKPF WITH HEADER LINE.
...
...
APPEND lw_bkpf TO it_bkpf.

• COLLECT Statement: If attribute of character string is not equal with same field in your work area, this statement operate look like append statement. If attribute of character string is equal with same field in your work area, this statement operate add the value of numeric (P, F, I).
  Example

DATA: lw_bkpf LIKE BKPF,
      it_bkpf TYPE TABLE OF BKPF WITH HEADER LINE.
...
...
COLLECT lw_bkpf INTO it_bkpf.

• INSERT Statement: Insert statement is look like append statement, but you can specify the index that you want to insert.
  Example

DATA: lw_bkpf LIKE BKPF,
      it_bkpf TYPE TABLE OF BKPF WITH HEADER LINE.
...
...
INSERT lw_bkpf INTO it_bkpf INDEX 3.

• MODIFY Statement: You can modify the data line of internal table by this statement.
  Example

DATA: lw_bkpf LIKE BKPF,
      it_bkpf TYPE TABLE OF BKPF WITH HEADER LINE.
...
...
MODIFY it_bkpf INDEX 2 FROM lw_bkpf.

• DELETE Statement: You can delete the data line of internal table by this statement.
  Example

DATA: lw_bkpf LIKE BKPF,
      it_bkpf TYPE TABLE OF BKPF WITH HEADER LINE.
...
...
DELETE it_bkpf INDEX 2.
DELETE it_bkpf WITH KEY BELNR = ’1000000001’.

• READ Statement: You can access to the data line of internal table by this statement.
  Example

DATA: lw_bkpf LIKE BKPF,
      it_bkpf TYPE TABLE OF BKPF WITH HEADER LINE.
...
...
READ TABLE it_bkpf INDEX 2 INTO lw_bkpf.  

You can create field name in run time and assign the created name in your field-symbols by statement "ASSIGN ... TO ...".

Example

DATA: name(20),
      lv_check(1).

DATA: BEGIN OF itab OCCURS 0,
        fld1(4),
        fld2(4),
      END OF itab.
FIELD-SYMBOLS .
...
...
LOOP AT itab.
  IF lv_check = ’X’.
    name = ’ITAB-FLD1’.
  ELSE.
    name = ’ITAB-FLD2’.
  ENDIF.
  ASSIGN (name) TO .  

If you want to know how much the run time of your program by insert ABAP statement, you can insert command "GET RUN TIME" in the top and bottom of program block and minus two times.

Example

DATA: time1 TYPE I,
      time2 TYPE I,
      runtime TYPE I.
GET RUN TIME FIELD time1.
          .....
  ...program statement...
          .....
GET RUN TIME FIELD time2.
runtime = time2 - time1.

When you want to comment to your html file, the statement should be begin by "". Between your comment statement do not have "--".

Example

If you know year, month and fiscal year variant and you want to know the first date and end date of that period, you can apply function module "PERIOD_DAY_DETERMINE" in ABAP/4 to get them.

Example

CALL FUNCTION ’PERIOD_DAY_DETERMINE’
  EXPORTING
    I_GJAHR       =     ’2006’       "Year
    I_MONAT       =     ’01’         "Month
    I_PERIV       =     ’F2’         "Fiscal Year Variant

  IMPORTING
    E_FDAY        =     FIRST_DATE
    E_LDAY        =     END_DATE
  EXCEPTIONS