ABAP Select data from SAP table RKEA2 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RKEA2 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 RKEA2. 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 RKEA2 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_RKEA2 TYPE STANDARD TABLE OF RKEA2,
      WA_RKEA2 TYPE RKEA2,
      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: <RKEA2> TYPE RKEA2.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RKEA2.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RKEA2
  INTO TABLE IT_RKEA2.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RKEA2
*  INTO TABLE @DATA(IT_RKEA22).
*--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_RKEA2 INDEX 1 INTO DATA(WA_RKEA22).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RKEA2 ASSIGNING <RKEA2>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RKEA2>-ERKRS = 1.
<RKEA2>-BEZEK = 1.
<RKEA2>-STATUS = 1.
<RKEA2>-ABREG = 1.
<RKEA2>-ABL_TEXT = 1.

ENDLOOP.

LOOP AT IT_RKEA2 INTO WA_RKEA2.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RKEA2-FOLGE, sy-vline,
  WA_RKEA2-QFELD1, sy-vline,
  WA_RKEA2-QFELD2, sy-vline,
  WA_RKEA2-QFELD3, sy-vline,
  WA_RKEA2-ZFELD1, sy-vline,
  WA_RKEA2-ZFELD2, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RKEA2 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_RKEA2 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_RKEA2 INTO WA_RKEA2.


*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_RKEA2_STR, 
ERKRS TYPE STRING,
BEZEK TYPE STRING,
STATUS TYPE STRING,
ABREG TYPE STRING,
ABL_TEXT TYPE STRING,
FOLGE TYPE STRING,
QFELD1 TYPE STRING,
QFELD2 TYPE STRING,
QFELD3 TYPE STRING,
ZFELD1 TYPE STRING,
ZFELD2 TYPE STRING,
ZFELD3 TYPE STRING,
ZFELD4 TYPE STRING,
ZFELD5 TYPE STRING,
ZFELD6 TYPE STRING,
ZFELD7 TYPE STRING,
ZFELD8 TYPE STRING,
ZFELD9 TYPE STRING,
ZFELD10 TYPE STRING,
Q1TEXT TYPE STRING,
Q2TEXT TYPE STRING,
Q3TEXT TYPE STRING,
Z1TEXT TYPE STRING,
Z2TEXT TYPE STRING,
Z3TEXT TYPE STRING,
Z4TEXT TYPE STRING,
Z5TEXT TYPE STRING,
Z6TEXT TYPE STRING,
Z7TEXT TYPE STRING,
Z8TEXT TYPE STRING,
Z9TEXT TYPE STRING,
Z10TEXT TYPE STRING,
DAT1 TYPE STRING,
DAT2 TYPE STRING,
FIELDNAME TYPE STRING,
FIELDTEXT TYPE STRING,
DAT3 TYPE STRING,
DAT4 TYPE STRING,
GENTAB TYPE STRING,
Q1_TEXT TYPE STRING,
Q2_TEXT TYPE STRING,
FIELDTEXT2 TYPE STRING,
QFELD_VON TYPE STRING,
QFELD_BIS TYPE STRING,
PA_TYPE TYPE STRING,
PA_TYPE_1 TYPE STRING,
PA_TYPE_2 TYPE STRING,
PSL_SET TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RKEA2_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_RKEA2_STR-ERKRS sy-vline 
WA_RKEA2_STR-BEZEK sy-vline 
WA_RKEA2_STR-STATUS sy-vline 
WA_RKEA2_STR-ABREG sy-vline 
WA_RKEA2_STR-ABL_TEXT sy-vline 
WA_RKEA2_STR-FOLGE sy-vline 
WA_RKEA2_STR-QFELD1 sy-vline 
WA_RKEA2_STR-QFELD2 sy-vline 
WA_RKEA2_STR-QFELD3 sy-vline 
WA_RKEA2_STR-ZFELD1 sy-vline 
WA_RKEA2_STR-ZFELD2 sy-vline 
WA_RKEA2_STR-ZFELD3 sy-vline 
WA_RKEA2_STR-ZFELD4 sy-vline 
WA_RKEA2_STR-ZFELD5 sy-vline 
WA_RKEA2_STR-ZFELD6 sy-vline 
WA_RKEA2_STR-ZFELD7 sy-vline 
WA_RKEA2_STR-ZFELD8 sy-vline 
WA_RKEA2_STR-ZFELD9 sy-vline 
WA_RKEA2_STR-ZFELD10 sy-vline 
WA_RKEA2_STR-Q1TEXT sy-vline 
WA_RKEA2_STR-Q2TEXT sy-vline 
WA_RKEA2_STR-Q3TEXT sy-vline 
WA_RKEA2_STR-Z1TEXT sy-vline 
WA_RKEA2_STR-Z2TEXT sy-vline 
WA_RKEA2_STR-Z3TEXT sy-vline 
WA_RKEA2_STR-Z4TEXT sy-vline 
WA_RKEA2_STR-Z5TEXT sy-vline 
WA_RKEA2_STR-Z6TEXT sy-vline 
WA_RKEA2_STR-Z7TEXT sy-vline 
WA_RKEA2_STR-Z8TEXT sy-vline 
WA_RKEA2_STR-Z9TEXT sy-vline 
WA_RKEA2_STR-Z10TEXT sy-vline 
WA_RKEA2_STR-DAT1 sy-vline 
WA_RKEA2_STR-DAT2 sy-vline 
WA_RKEA2_STR-FIELDNAME sy-vline 
WA_RKEA2_STR-FIELDTEXT sy-vline 
WA_RKEA2_STR-DAT3 sy-vline 
WA_RKEA2_STR-DAT4 sy-vline 
WA_RKEA2_STR-GENTAB sy-vline 
WA_RKEA2_STR-Q1_TEXT sy-vline 
WA_RKEA2_STR-Q2_TEXT sy-vline 
WA_RKEA2_STR-FIELDTEXT2 sy-vline 
WA_RKEA2_STR-QFELD_VON sy-vline 
WA_RKEA2_STR-QFELD_BIS sy-vline 
WA_RKEA2_STR-PA_TYPE sy-vline 
WA_RKEA2_STR-PA_TYPE_1 sy-vline 
WA_RKEA2_STR-PA_TYPE_2 sy-vline 
WA_RKEA2_STR-PSL_SET sy-vline      INTO ld_text SEPARATED BY SPACE.

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