ABAP Select data from SAP table BKK84 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP BKK84 table and store it within an internal table, including using the newer @DATA inline declaration methods. It also shows you various ways to process this data using ABAP work area, inline declaration or field symbols including executing all the relevant CONVERSION_EXIT routines specific to BKK84. See here for more generic Select statement tips.

Sometimes data within SAP is stored within the database table in a different format to what it is displayed to the user. These input/output conversation FM routines are what translates the data between the two formats.

There is also a full declaration of the BKK84 table where each field has a char/string type for you to simply copy and paste. This allows you to use processing that is only available to these field types such as the CONCATENATE statement.

DATA: IT_BKK84 TYPE STANDARD TABLE OF BKK84,
      WA_BKK84 TYPE BKK84,
      GD_STR TYPE STRING.

DATA: lo_typedescr type REF TO cl_abap_typedescr.
DATA: lv_fieldname type fieldname.

FIELD-SYMBOLS: <FIELD> TYPE any.
FIELD-SYMBOLS: <BKK84> TYPE BKK84.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_BKK84.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM BKK84
  INTO TABLE IT_BKK84.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM BKK84
*  INTO TABLE @DATA(IT_BKK842).
*--Further methods of using ABAP code to  select data from SAP database tables

*You can also declare the header/work area using the in-line DATA declaration method
READ TABLE IT_BKK84 INDEX 1 INTO DATA(WA_BKK842).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_BKK84 ASSIGNING <BKK84>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<BKK84>-MANDT = 1.
<BKK84>-BKKRS = 1.
<BKK84>-ACNUM_INT = 1.
<BKK84>-COND = 1.
<BKK84>-VALIDFROM = 1.

ENDLOOP.

LOOP AT IT_BKK84 INTO WA_BKK84.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_BKK84-VALIDTO, sy-vline,
  WA_BKK84-CONDCATG, sy-vline,
  WA_BKK84-CONDDIF, sy-vline,
  WA_BKK84-CONDDIF_V1, sy-vline,
  WA_BKK84-CONDDIF_2, sy-vline,
  WA_BKK84-CONDDIF_V2, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_BKK84 you want to display...

  WRITE:/ sy-uline.
* Aternatively use generic code to Write field values (and NAME) to screen report
  DO.
    ASSIGN COMPONENT sy-index OF STRUCTURE wa_BKK84 TO <field>.
    IF sy-subrc <> 0. EXIT. ENDIF.
    WRITE:/ 'Field Value', <field>, sy-vline.
    gd_str = <field> .
    lo_typedescr ?= CL_ABAP_DATADESCR=>DESCRIBE_BY_DATA( <field> ).
    lv_fieldname = lo_typedescr->GET_RELATIVE_NAME( ).
    WRITE:/ 'Field Name', lv_fieldname.
  ENDDO.

  
*Redo loop but convert all fields from internal to out value  
LOOP AT IT_BKK84 INTO WA_BKK84.


*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Convert all fields to display/output versions using conversion routines
  PERFORM convert_all_field_values CHANGING wa_EKKO.
	 
ENDLOOP.

  
*&---------------------------------------------------------------------*
*& Form convert_all_field_values
*&---------------------------------------------------------------------*
FORM convert_all_field_values CHANGING p_EKKO LIKE wa_EKKO.
DATA: ld_input(1000) TYPE c, ld_output(1000) TYPE C.

*Conversion exit ALPHA, internal->external for field ACNUM_INT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_BKK84-ACNUM_INT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BKK84-ACNUM_INT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit INVDT, internal->external for field VALIDFROM
CALL FUNCTION 'CONVERSION_EXIT_INVDT_OUTPUT'
  EXPORTING
    input =                      WA_BKK84-VALIDFROM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BKK84-VALIDFROM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit INVDT, internal->external for field VALIDTO
CALL FUNCTION 'CONVERSION_EXIT_INVDT_OUTPUT'
  EXPORTING
    input =                      WA_BKK84-VALIDTO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BKK84-VALIDTO.
WRITE:/ 'New Value:', ld_input.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_BKK84_STR, 
MANDT TYPE STRING,
BKKRS TYPE STRING,
ACNUM_INT TYPE STRING,
COND TYPE STRING,
VALIDFROM TYPE STRING,
VALIDTO TYPE STRING,
CONDCATG TYPE STRING,
CONDDIF TYPE STRING,
CONDDIF_V1 TYPE STRING,
CONDDIF_2 TYPE STRING,
CONDDIF_V2 TYPE STRING,
CURR TYPE STRING,
INTMET TYPE STRING,
STGMETH TYPE STRING,
STGBASIS TYPE STRING,
CALCTYP TYPE STRING,
FLGFROMTO TYPE STRING,
FLGADDDEBI TYPE STRING,
CONDTIME TYPE STRING,
CONDTIME_U TYPE STRING,
TIMEPROPCALC TYPE STRING,
FREECOUNT TYPE STRING,
EXEMPTLIM TYPE STRING,
FLGLOCKED TYPE STRING,
SORTF TYPE STRING,
USEDTILL TYPE STRING,
XSURCHARGE TYPE STRING,
SROUND TYPE STRING,
PRUNIT TYPE STRING,
ADINTMET TYPE STRING,
XZEROLIM TYPE STRING,
CRUSER TYPE STRING,
CRDATE TYPE STRING,
CRTIME TYPE STRING,
CHGUSER TYPE STRING,
CHGDATE TYPE STRING,
CHGTIME TYPE STRING,
RELUSER TYPE STRING,
RELDATE TYPE STRING,
RELTIME TYPE STRING,
X_DUEDATE TYPE STRING,
X_VD_DUEDATE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_BKK84_STR type T_EKKO_STR.

DATA: ld_text TYPE string.

LOOP AT IT_EKKO INTO WA_EKKO.
  MOVE-CORRESPONDING wa_EKKO TO WA_EKKO_STR.
  CONCATENATE: sy-vline
WA_BKK84_STR-MANDT sy-vline 
WA_BKK84_STR-BKKRS sy-vline 
WA_BKK84_STR-ACNUM_INT sy-vline 
WA_BKK84_STR-COND sy-vline 
WA_BKK84_STR-VALIDFROM sy-vline 
WA_BKK84_STR-VALIDTO sy-vline 
WA_BKK84_STR-CONDCATG sy-vline 
WA_BKK84_STR-CONDDIF sy-vline 
WA_BKK84_STR-CONDDIF_V1 sy-vline 
WA_BKK84_STR-CONDDIF_2 sy-vline 
WA_BKK84_STR-CONDDIF_V2 sy-vline 
WA_BKK84_STR-CURR sy-vline 
WA_BKK84_STR-INTMET sy-vline 
WA_BKK84_STR-STGMETH sy-vline 
WA_BKK84_STR-STGBASIS sy-vline 
WA_BKK84_STR-CALCTYP sy-vline 
WA_BKK84_STR-FLGFROMTO sy-vline 
WA_BKK84_STR-FLGADDDEBI sy-vline 
WA_BKK84_STR-CONDTIME sy-vline 
WA_BKK84_STR-CONDTIME_U sy-vline 
WA_BKK84_STR-TIMEPROPCALC sy-vline 
WA_BKK84_STR-FREECOUNT sy-vline 
WA_BKK84_STR-EXEMPTLIM sy-vline 
WA_BKK84_STR-FLGLOCKED sy-vline 
WA_BKK84_STR-SORTF sy-vline 
WA_BKK84_STR-USEDTILL sy-vline 
WA_BKK84_STR-XSURCHARGE sy-vline 
WA_BKK84_STR-SROUND sy-vline 
WA_BKK84_STR-PRUNIT sy-vline 
WA_BKK84_STR-ADINTMET sy-vline 
WA_BKK84_STR-XZEROLIM sy-vline 
WA_BKK84_STR-CRUSER sy-vline 
WA_BKK84_STR-CRDATE sy-vline 
WA_BKK84_STR-CRTIME sy-vline 
WA_BKK84_STR-CHGUSER sy-vline 
WA_BKK84_STR-CHGDATE sy-vline 
WA_BKK84_STR-CHGTIME sy-vline 
WA_BKK84_STR-RELUSER sy-vline 
WA_BKK84_STR-RELDATE sy-vline 
WA_BKK84_STR-RELTIME sy-vline 
WA_BKK84_STR-X_DUEDATE sy-vline 
WA_BKK84_STR-X_VD_DUEDATE sy-vline      INTO ld_text SEPARATED BY SPACE.

*Add any further fields from structure WA_EKKO_STR you want to CONCATENATE...
ENDLOOP.
ENDFORM.