ABAP Select data from SAP table BKK620 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP BKK620 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 BKK620. 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 BKK620 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_BKK620 TYPE STANDARD TABLE OF BKK620,
      WA_BKK620 TYPE BKK620,
      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: <BKK620> TYPE BKK620.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_BKK620.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM BKK620
  INTO TABLE IT_BKK620.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM BKK620
*  INTO TABLE @DATA(IT_BKK6202).
*--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_BKK620 INDEX 1 INTO DATA(WA_BKK6202).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_BKK620 ASSIGNING <BKK620>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<BKK620>-CLIENT = 1.
<BKK620>-TREENR = 1.
<BKK620>-DATE_FROM = 1.
<BKK620>-BKKRS = 1.
<BKK620>-ACCOUNT = 1.

ENDLOOP.

LOOP AT IT_BKK620 INTO WA_BKK620.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_BKK620-CURR, sy-vline,
  WA_BKK620-CLMINBLNCE, sy-vline,
  WA_BKK620-CLMAXBLNCE, sy-vline,
  WA_BKK620-CLBASICSUM, sy-vline,
  WA_BKK620-CLMINTRANS, sy-vline,
  WA_BKK620-CLPAYNOTE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_BKK620 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_BKK620 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_BKK620 INTO WA_BKK620.


*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 TREENR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_BKK620-TREENR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BKK620-TREENR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit INVDT, internal->external for field DATE_FROM
CALL FUNCTION 'CONVERSION_EXIT_INVDT_OUTPUT'
  EXPORTING
    input =                      WA_BKK620-DATE_FROM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BKK620-DATE_FROM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ACCOUNT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_BKK620-ACCOUNT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BKK620-ACCOUNT.
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_BKK620_STR, 
CLIENT TYPE STRING,
TREENR TYPE STRING,
DATE_FROM TYPE STRING,
BKKRS TYPE STRING,
ACCOUNT TYPE STRING,
CURR TYPE STRING,
CLMINBLNCE TYPE STRING,
CLMAXBLNCE TYPE STRING,
CLBASICSUM TYPE STRING,
CLMINTRANS TYPE STRING,
CLPAYNOTE TYPE STRING,
CLPAYNOTE1 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_BKK620_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_BKK620_STR-CLIENT sy-vline 
WA_BKK620_STR-TREENR sy-vline 
WA_BKK620_STR-DATE_FROM sy-vline 
WA_BKK620_STR-BKKRS sy-vline 
WA_BKK620_STR-ACCOUNT sy-vline 
WA_BKK620_STR-CURR sy-vline 
WA_BKK620_STR-CLMINBLNCE sy-vline 
WA_BKK620_STR-CLMAXBLNCE sy-vline 
WA_BKK620_STR-CLBASICSUM sy-vline 
WA_BKK620_STR-CLMINTRANS sy-vline 
WA_BKK620_STR-CLPAYNOTE sy-vline 
WA_BKK620_STR-CLPAYNOTE1 sy-vline      INTO ld_text SEPARATED BY SPACE.

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