ABAP Select data from SAP table BKKC30 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP BKKC30 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 BKKC30. 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 BKKC30 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_BKKC30 TYPE STANDARD TABLE OF BKKC30,
      WA_BKKC30 TYPE BKKC30,
      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: <BKKC30> TYPE BKKC30.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_BKKC30.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM BKKC30
  INTO TABLE IT_BKKC30.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM BKKC30
*  INTO TABLE @DATA(IT_BKKC302).
*--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_BKKC30 INDEX 1 INTO DATA(WA_BKKC302).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_BKKC30 ASSIGNING <BKKC30>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<BKKC30>-MANDT = 1.
<BKKC30>-BKKRS = 1.
<BKKC30>-ACNUM_INT = 1.
<BKKC30>-FIKEY = 1.
<BKKC30>-CNT_POST = 1.

ENDLOOP.

LOOP AT IT_BKKC30 INTO WA_BKKC30.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_BKKC30-DATE_POST, sy-vline,
  WA_BKKC30-CRDAT, sy-vline,
  WA_BKKC30-CRTIM, sy-vline,
  WA_BKKC30-GLPROCESS, sy-vline,
  WA_BKKC30-GLACTION, sy-vline,
  WA_BKKC30-GLACCT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_BKKC30 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_BKKC30 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_BKKC30 INTO WA_BKKC30.


*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_BKKC30-ACNUM_INT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BKKC30-ACNUM_INT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field GLACCT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_BKKC30-GLACCT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BKKC30-GLACCT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field GLACCT_D
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_BKKC30-GLACCT_D
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BKKC30-GLACCT_D.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field GLACCT_C
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_BKKC30-GLACCT_C
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BKKC30-GLACCT_C.
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_BKKC30_STR, 
MANDT TYPE STRING,
BKKRS TYPE STRING,
ACNUM_INT TYPE STRING,
FIKEY TYPE STRING,
CNT_POST TYPE STRING,
DATE_POST TYPE STRING,
CRDAT TYPE STRING,
CRTIM TYPE STRING,
GLPROCESS TYPE STRING,
GLACTION TYPE STRING,
GLACCT TYPE STRING,
GSBER TYPE STRING,
GLACCT_D TYPE STRING,
GLACCT_C TYPE STRING,
BUSA_D TYPE STRING,
BUSA_C TYPE STRING,
BAL_OLD_CUR TYPE STRING,
BAL_OLD_AMNT TYPE STRING,
ACUR TYPE STRING,
A_AMOUNT TYPE STRING,
GLKEY TYPE STRING,
PSTYPE TYPE STRING,
GLACT TYPE STRING,
EXTRAKEY TYPE STRING,
BSPPNR TYPE STRING,
FIKEYC TYPE STRING,END OF T_EKKO_STR.
DATA: WA_BKKC30_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_BKKC30_STR-MANDT sy-vline 
WA_BKKC30_STR-BKKRS sy-vline 
WA_BKKC30_STR-ACNUM_INT sy-vline 
WA_BKKC30_STR-FIKEY sy-vline 
WA_BKKC30_STR-CNT_POST sy-vline 
WA_BKKC30_STR-DATE_POST sy-vline 
WA_BKKC30_STR-CRDAT sy-vline 
WA_BKKC30_STR-CRTIM sy-vline 
WA_BKKC30_STR-GLPROCESS sy-vline 
WA_BKKC30_STR-GLACTION sy-vline 
WA_BKKC30_STR-GLACCT sy-vline 
WA_BKKC30_STR-GSBER sy-vline 
WA_BKKC30_STR-GLACCT_D sy-vline 
WA_BKKC30_STR-GLACCT_C sy-vline 
WA_BKKC30_STR-BUSA_D sy-vline 
WA_BKKC30_STR-BUSA_C sy-vline 
WA_BKKC30_STR-BAL_OLD_CUR sy-vline 
WA_BKKC30_STR-BAL_OLD_AMNT sy-vline 
WA_BKKC30_STR-ACUR sy-vline 
WA_BKKC30_STR-A_AMOUNT sy-vline 
WA_BKKC30_STR-GLKEY sy-vline 
WA_BKKC30_STR-PSTYPE sy-vline 
WA_BKKC30_STR-GLACT sy-vline 
WA_BKKC30_STR-EXTRAKEY sy-vline 
WA_BKKC30_STR-BSPPNR sy-vline 
WA_BKKC30_STR-FIKEYC sy-vline      INTO ld_text SEPARATED BY SPACE.

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