ABAP Select data from SAP table RKEA3 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RKEA3 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 RKEA3. 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 RKEA3 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_RKEA3 TYPE STANDARD TABLE OF RKEA3,
      WA_RKEA3 TYPE RKEA3,
      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: <RKEA3> TYPE RKEA3.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RKEA3.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RKEA3
  INTO TABLE IT_RKEA3.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RKEA3
*  INTO TABLE @DATA(IT_RKEA32).
*--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_RKEA3 INDEX 1 INTO DATA(WA_RKEA32).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RKEA3 ASSIGNING <RKEA3>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RKEA3>-MANDT = 1.
<RKEA3>-ERKRS = 1.
<RKEA3>-ERKRS_BZ = 1.
<RKEA3>-RERKRS = 1.
<RKEA3>-SYSTP = 1.

ENDLOOP.

LOOP AT IT_RKEA3 INTO WA_RKEA3.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RKEA3-SYSTP_SAP, sy-vline,
  WA_RKEA3-SYSTP_CUS, sy-vline,
  WA_RKEA3-BRANC, sy-vline,
  WA_RKEA3-PATYPE, sy-vline,
  WA_RKEA3-PA_TYPE_1, sy-vline,
  WA_RKEA3-PA_TYPE_2, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RKEA3 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_RKEA3 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_RKEA3 INTO WA_RKEA3.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_RKEA3_STR, 
MANDT TYPE STRING,
ERKRS TYPE STRING,
ERKRS_BZ TYPE STRING,
RERKRS TYPE STRING,
SYSTP TYPE STRING,
SYSTP_SAP TYPE STRING,
SYSTP_CUS TYPE STRING,
BRANC TYPE STRING,
PATYPE TYPE STRING,
PA_TYPE_1 TYPE STRING,
PA_TYPE_2 TYPE STRING,
PSL_SET TYPE STRING,
PSL_GEN TYPE STRING,
TBSTA TYPE STRING,
TBSTA_MAX TYPE STRING,
EXIDB TYPE STRING,
EXIDA TYPE STRING,
EXIMDA TYPE STRING,
ENSTA TYPE STRING,
ENSTA_2 TYPE STRING,
ATRSTA TYPE STRING,
BLOCKF TYPE STRING,
BLK1 TYPE STRING,
BLK2 TYPE STRING,
BLK4 TYPE STRING,
BLK8 TYPE STRING,
BLK16 TYPE STRING,
BLKEND TYPE STRING,
FLGATR TYPE STRING,
FLGSTR TYPE STRING,
FLGDSTR TYPE STRING,
FLGDENV TYPE STRING,
FLGDCUS TYPE STRING,
FLGCURR TYPE STRING,
FLGOMOD TYPE STRING,
FLGMOD TYPE STRING,
OKCOD TYPE STRING,
DISP TYPE STRING,
MODI TYPE STRING,
INSE TYPE STRING,
DELE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RKEA3_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_RKEA3_STR-MANDT sy-vline 
WA_RKEA3_STR-ERKRS sy-vline 
WA_RKEA3_STR-ERKRS_BZ sy-vline 
WA_RKEA3_STR-RERKRS sy-vline 
WA_RKEA3_STR-SYSTP sy-vline 
WA_RKEA3_STR-SYSTP_SAP sy-vline 
WA_RKEA3_STR-SYSTP_CUS sy-vline 
WA_RKEA3_STR-BRANC sy-vline 
WA_RKEA3_STR-PATYPE sy-vline 
WA_RKEA3_STR-PA_TYPE_1 sy-vline 
WA_RKEA3_STR-PA_TYPE_2 sy-vline 
WA_RKEA3_STR-PSL_SET sy-vline 
WA_RKEA3_STR-PSL_GEN sy-vline 
WA_RKEA3_STR-TBSTA sy-vline 
WA_RKEA3_STR-TBSTA_MAX sy-vline 
WA_RKEA3_STR-EXIDB sy-vline 
WA_RKEA3_STR-EXIDA sy-vline 
WA_RKEA3_STR-EXIMDA sy-vline 
WA_RKEA3_STR-ENSTA sy-vline 
WA_RKEA3_STR-ENSTA_2 sy-vline 
WA_RKEA3_STR-ATRSTA sy-vline 
WA_RKEA3_STR-BLOCKF sy-vline 
WA_RKEA3_STR-BLK1 sy-vline 
WA_RKEA3_STR-BLK2 sy-vline 
WA_RKEA3_STR-BLK4 sy-vline 
WA_RKEA3_STR-BLK8 sy-vline 
WA_RKEA3_STR-BLK16 sy-vline 
WA_RKEA3_STR-BLKEND sy-vline 
WA_RKEA3_STR-FLGATR sy-vline 
WA_RKEA3_STR-FLGSTR sy-vline 
WA_RKEA3_STR-FLGDSTR sy-vline 
WA_RKEA3_STR-FLGDENV sy-vline 
WA_RKEA3_STR-FLGDCUS sy-vline 
WA_RKEA3_STR-FLGCURR sy-vline 
WA_RKEA3_STR-FLGOMOD sy-vline 
WA_RKEA3_STR-FLGMOD sy-vline 
WA_RKEA3_STR-OKCOD sy-vline 
WA_RKEA3_STR-DISP sy-vline 
WA_RKEA3_STR-MODI sy-vline 
WA_RKEA3_STR-INSE sy-vline 
WA_RKEA3_STR-DELE sy-vline      INTO ld_text SEPARATED BY SPACE.

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