ABAP Select data from SAP table BIKLA into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM BIKLA
*  INTO TABLE @DATA(IT_BIKLA2).
*--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_BIKLA INDEX 1 INTO DATA(WA_BIKLA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<BIKLA>-STYPE = 1.
<BIKLA>-TCODE = 1.
<BIKLA>-KLART = 1.
<BIKLA>-CLASS = 1.
<BIKLA>-RCLAS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_BIKLA-RKLRT, sy-vline,
  WA_BIKLA-KLBEZ, sy-vline,
  WA_BIKLA-STATU, sy-vline,
  WA_BIKLA-KLAGR, sy-vline,
  WA_BIKLA-BGRKP, sy-vline,
  WA_BIKLA-BGRKL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_BIKLA 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_BIKLA 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_BIKLA INTO WA_BIKLA.


*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 DOKNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_BIKLA-DOKNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BIKLA-DOKNR.
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_BIKLA_STR, 
STYPE TYPE STRING,
TCODE TYPE STRING,
KLART TYPE STRING,
CLASS TYPE STRING,
RCLAS TYPE STRING,
RKLRT TYPE STRING,
KLBEZ TYPE STRING,
STATU TYPE STRING,
KLAGR TYPE STRING,
BGRKP TYPE STRING,
BGRKL TYPE STRING,
BGRSE TYPE STRING,
PRAUS TYPE STRING,
WAAUS TYPE STRING,
ERAUS TYPE STRING,
SICHT TYPE STRING,
VONDT TYPE STRING,
BISDT TYPE STRING,
DOKNR TYPE STRING,
DOKAR TYPE STRING,
DOKVR TYPE STRING,
DOKTL TYPE STRING,
ALLSP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_BIKLA_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_BIKLA_STR-STYPE sy-vline 
WA_BIKLA_STR-TCODE sy-vline 
WA_BIKLA_STR-KLART sy-vline 
WA_BIKLA_STR-CLASS sy-vline 
WA_BIKLA_STR-RCLAS sy-vline 
WA_BIKLA_STR-RKLRT sy-vline 
WA_BIKLA_STR-KLBEZ sy-vline 
WA_BIKLA_STR-STATU sy-vline 
WA_BIKLA_STR-KLAGR sy-vline 
WA_BIKLA_STR-BGRKP sy-vline 
WA_BIKLA_STR-BGRKL sy-vline 
WA_BIKLA_STR-BGRSE sy-vline 
WA_BIKLA_STR-PRAUS sy-vline 
WA_BIKLA_STR-WAAUS sy-vline 
WA_BIKLA_STR-ERAUS sy-vline 
WA_BIKLA_STR-SICHT sy-vline 
WA_BIKLA_STR-VONDT sy-vline 
WA_BIKLA_STR-BISDT sy-vline 
WA_BIKLA_STR-DOKNR sy-vline 
WA_BIKLA_STR-DOKAR sy-vline 
WA_BIKLA_STR-DOKVR sy-vline 
WA_BIKLA_STR-DOKTL sy-vline 
WA_BIKLA_STR-ALLSP sy-vline      INTO ld_text SEPARATED BY SPACE.

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