ABAP Select data from SAP table AKKPCOM into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM AKKPCOM
*  INTO TABLE @DATA(IT_AKKPCOM2).
*--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_AKKPCOM INDEX 1 INTO DATA(WA_AKKPCOM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<AKKPCOM>-LCNUM = 1.
<AKKPCOM>-AKKTP = 1.
<AKKPCOM>-AKART = 1.
<AKKPCOM>-BUKRS = 1.
<AKKPCOM>-KUNNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_AKKPCOM-WAEMP, sy-vline,
  WA_AKKPCOM-WRTAK, sy-vline,
  WA_AKKPCOM-WAERS, sy-vline,
  WA_AKKPCOM-EUPRZ, sy-vline,
  WA_AKKPCOM-ZTERM, sy-vline,
  WA_AKKPCOM-DATAA, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_AKKPCOM 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_AKKPCOM 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_AKKPCOM INTO WA_AKKPCOM.


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

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

*Conversion exit ALPHA, internal->external for field WAEMP
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_AKKPCOM-WAEMP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_AKKPCOM-WAEMP.
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_AKKPCOM_STR, 
LCNUM TYPE STRING,
AKKTP TYPE STRING,
AKART TYPE STRING,
BUKRS TYPE STRING,
KUNNR TYPE STRING,
WAEMP TYPE STRING,
WRTAK TYPE STRING,
WAERS TYPE STRING,
EUPRZ TYPE STRING,
ZTERM TYPE STRING,
DATAA TYPE STRING,
DATAI TYPE STRING,
DATAJ TYPE STRING,
DATAO TYPE STRING,
DATAY TYPE STRING,
DATAH TYPE STRING,
DATXA TYPE STRING,
ANYTG TYPE STRING,
INCO1 TYPE STRING,
INCO2 TYPE STRING,
AUTLF TYPE STRING,
ATRSI TYPE STRING,
AKKST TYPE STRING,END OF T_EKKO_STR.
DATA: WA_AKKPCOM_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_AKKPCOM_STR-LCNUM sy-vline 
WA_AKKPCOM_STR-AKKTP sy-vline 
WA_AKKPCOM_STR-AKART sy-vline 
WA_AKKPCOM_STR-BUKRS sy-vline 
WA_AKKPCOM_STR-KUNNR sy-vline 
WA_AKKPCOM_STR-WAEMP sy-vline 
WA_AKKPCOM_STR-WRTAK sy-vline 
WA_AKKPCOM_STR-WAERS sy-vline 
WA_AKKPCOM_STR-EUPRZ sy-vline 
WA_AKKPCOM_STR-ZTERM sy-vline 
WA_AKKPCOM_STR-DATAA sy-vline 
WA_AKKPCOM_STR-DATAI sy-vline 
WA_AKKPCOM_STR-DATAJ sy-vline 
WA_AKKPCOM_STR-DATAO sy-vline 
WA_AKKPCOM_STR-DATAY sy-vline 
WA_AKKPCOM_STR-DATAH sy-vline 
WA_AKKPCOM_STR-DATXA sy-vline 
WA_AKKPCOM_STR-ANYTG sy-vline 
WA_AKKPCOM_STR-INCO1 sy-vline 
WA_AKKPCOM_STR-INCO2 sy-vline 
WA_AKKPCOM_STR-AUTLF sy-vline 
WA_AKKPCOM_STR-ATRSI sy-vline 
WA_AKKPCOM_STR-AKKST sy-vline      INTO ld_text SEPARATED BY SPACE.

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