ABAP Select data from SAP table APICABN into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM APICABN
*  INTO TABLE @DATA(IT_APICABN2).
*--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_APICABN INDEX 1 INTO DATA(WA_APICABN2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<APICABN>-ATUDF = 1.
<APICABN>-ANZST = 1.
<APICABN>-ANZDZ = 1.
<APICABN>-ATKLE = 1.
<APICABN>-ATDEX = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_APICABN-ATDIM, sy-vline,
  WA_APICABN-ATSCH, sy-vline,
  WA_APICABN-ATVOR, sy-vline,
  WA_APICABN-EINH2, sy-vline,
  WA_APICABN-ATMST, sy-vline,
  WA_APICABN-ATKLA, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_APICABN 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_APICABN 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_APICABN INTO WA_APICABN.


*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_APICABN-DOKNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_APICABN-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_APICABN_STR, 
ATUDF TYPE STRING,
ANZST TYPE STRING,
ANZDZ TYPE STRING,
ATKLE TYPE STRING,
ATDEX TYPE STRING,
ATDIM TYPE STRING,
ATSCH TYPE STRING,
ATVOR TYPE STRING,
EINH2 TYPE STRING,
ATMST TYPE STRING,
ATKLA TYPE STRING,
ATERF TYPE STRING,
ATBEW TYPE STRING,
ATINT TYPE STRING,
ATFOD TYPE STRING,
ATVSC TYPE STRING,
ATWRD TYPE STRING,
ATINP TYPE STRING,
ATVIE TYPE STRING,
DOKAR TYPE STRING,
DOKNR TYPE STRING,
DOKVR TYPE STRING,
DOKTL TYPE STRING,
AUSWAHLMGE TYPE STRING,
ATGLA TYPE STRING,END OF T_EKKO_STR.
DATA: WA_APICABN_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_APICABN_STR-ATUDF sy-vline 
WA_APICABN_STR-ANZST sy-vline 
WA_APICABN_STR-ANZDZ sy-vline 
WA_APICABN_STR-ATKLE sy-vline 
WA_APICABN_STR-ATDEX sy-vline 
WA_APICABN_STR-ATDIM sy-vline 
WA_APICABN_STR-ATSCH sy-vline 
WA_APICABN_STR-ATVOR sy-vline 
WA_APICABN_STR-EINH2 sy-vline 
WA_APICABN_STR-ATMST sy-vline 
WA_APICABN_STR-ATKLA sy-vline 
WA_APICABN_STR-ATERF sy-vline 
WA_APICABN_STR-ATBEW sy-vline 
WA_APICABN_STR-ATINT sy-vline 
WA_APICABN_STR-ATFOD sy-vline 
WA_APICABN_STR-ATVSC sy-vline 
WA_APICABN_STR-ATWRD sy-vline 
WA_APICABN_STR-ATINP sy-vline 
WA_APICABN_STR-ATVIE sy-vline 
WA_APICABN_STR-DOKAR sy-vline 
WA_APICABN_STR-DOKNR sy-vline 
WA_APICABN_STR-DOKVR sy-vline 
WA_APICABN_STR-DOKTL sy-vline 
WA_APICABN_STR-AUSWAHLMGE sy-vline 
WA_APICABN_STR-ATGLA sy-vline      INTO ld_text SEPARATED BY SPACE.

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