ABAP Select data from SAP table REA42 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP REA42 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 REA42. 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 REA42 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_REA42 TYPE STANDARD TABLE OF REA42,
      WA_REA42 TYPE REA42,
      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: <REA42> TYPE REA42.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_REA42.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM REA42
  INTO TABLE IT_REA42.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM REA42
*  INTO TABLE @DATA(IT_REA422).
*--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_REA42 INDEX 1 INTO DATA(WA_REA422).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_REA42 ASSIGNING <REA42>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<REA42>-MANDT = 1.
<REA42>-PORTION = 1.
<REA42>-PORTIONTXT = 1.
<REA42>-PORTIONDAT = 1.
<REA42>-ABLEINH = 1.

ENDLOOP.

LOOP AT IT_REA42 INTO WA_REA42.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_REA42-ABLEINHTXT, sy-vline,
  WA_REA42-ABLEINHDAT, sy-vline,
  WA_REA42-TERMVON, sy-vline,
  WA_REA42-TERMBIS, sy-vline,
  WA_REA42-ABSZYK, sy-vline,
  WA_REA42-ABSKZ1, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_REA42 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_REA42 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_REA42 INTO WA_REA42.


*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_REA42_STR, 
MANDT TYPE STRING,
PORTION TYPE STRING,
PORTIONTXT TYPE STRING,
PORTIONDAT TYPE STRING,
ABLEINH TYPE STRING,
ABLEINHTXT TYPE STRING,
ABLEINHDAT TYPE STRING,
TERMVON TYPE STRING,
TERMBIS TYPE STRING,
ABSZYK TYPE STRING,
ABSKZ1 TYPE STRING,
ABSKZ2 TYPE STRING,
ABSKZ3 TYPE STRING,
ABSKZ4 TYPE STRING,
ABSKZ5 TYPE STRING,
ABSLE TYPE STRING,
ABSLL TYPE STRING,
ABSLM TYPE STRING,
ABSTAG TYPE STRING,
DAUER1 TYPE STRING,
DAUER2 TYPE STRING,
DAUER3 TYPE STRING,
DAUER4 TYPE STRING,
DAUER5 TYPE STRING,
DAUER6 TYPE STRING,
DAUER7 TYPE STRING,
KUM1 TYPE STRING,
KUM2 TYPE STRING,
KUM3 TYPE STRING,
KUM4 TYPE STRING,
KUM5 TYPE STRING,
KUM6 TYPE STRING,
KUM7 TYPE STRING,
ABLEINHDA2 TYPE STRING,
PORTIONDA2 TYPE STRING,
VKLASSE TYPE STRING,
SPARTYP TYPE STRING,
ANZABSL TYPE STRING,
MUSTER TYPE STRING,
ABSTERMIN TYPE STRING,
ABSZYKLEN TYPE STRING,
SATZART TYPE STRING,
GENERELL TYPE STRING,
VERTRAGSKL TYPE STRING,
SPARTENTYP TYPE STRING,
HMODUS TYPE STRING,
VMODUS TYPE STRING,
AMODUS TYPE STRING,
PORTION_DY TYPE STRING,
ABLEINH_DY TYPE STRING,
GENEREL_DY TYPE STRING,
PORTSCHLUE TYPE STRING,
ABLHSCHLUE TYPE STRING,
GENRSCHLUE TYPE STRING,
RAHMEN1 TYPE STRING,
RAHMEN2 TYPE STRING,
RAHMEN3 TYPE STRING,
RAHMEN4 TYPE STRING,
ALLGTEXT TYPE STRING,
ALLGTEXT2 TYPE STRING,
ABPKAR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_REA42_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_REA42_STR-MANDT sy-vline 
WA_REA42_STR-PORTION sy-vline 
WA_REA42_STR-PORTIONTXT sy-vline 
WA_REA42_STR-PORTIONDAT sy-vline 
WA_REA42_STR-ABLEINH sy-vline 
WA_REA42_STR-ABLEINHTXT sy-vline 
WA_REA42_STR-ABLEINHDAT sy-vline 
WA_REA42_STR-TERMVON sy-vline 
WA_REA42_STR-TERMBIS sy-vline 
WA_REA42_STR-ABSZYK sy-vline 
WA_REA42_STR-ABSKZ1 sy-vline 
WA_REA42_STR-ABSKZ2 sy-vline 
WA_REA42_STR-ABSKZ3 sy-vline 
WA_REA42_STR-ABSKZ4 sy-vline 
WA_REA42_STR-ABSKZ5 sy-vline 
WA_REA42_STR-ABSLE sy-vline 
WA_REA42_STR-ABSLL sy-vline 
WA_REA42_STR-ABSLM sy-vline 
WA_REA42_STR-ABSTAG sy-vline 
WA_REA42_STR-DAUER1 sy-vline 
WA_REA42_STR-DAUER2 sy-vline 
WA_REA42_STR-DAUER3 sy-vline 
WA_REA42_STR-DAUER4 sy-vline 
WA_REA42_STR-DAUER5 sy-vline 
WA_REA42_STR-DAUER6 sy-vline 
WA_REA42_STR-DAUER7 sy-vline 
WA_REA42_STR-KUM1 sy-vline 
WA_REA42_STR-KUM2 sy-vline 
WA_REA42_STR-KUM3 sy-vline 
WA_REA42_STR-KUM4 sy-vline 
WA_REA42_STR-KUM5 sy-vline 
WA_REA42_STR-KUM6 sy-vline 
WA_REA42_STR-KUM7 sy-vline 
WA_REA42_STR-ABLEINHDA2 sy-vline 
WA_REA42_STR-PORTIONDA2 sy-vline 
WA_REA42_STR-VKLASSE sy-vline 
WA_REA42_STR-SPARTYP sy-vline 
WA_REA42_STR-ANZABSL sy-vline 
WA_REA42_STR-MUSTER sy-vline 
WA_REA42_STR-ABSTERMIN sy-vline 
WA_REA42_STR-ABSZYKLEN sy-vline 
WA_REA42_STR-SATZART sy-vline 
WA_REA42_STR-GENERELL sy-vline 
WA_REA42_STR-VERTRAGSKL sy-vline 
WA_REA42_STR-SPARTENTYP sy-vline 
WA_REA42_STR-HMODUS sy-vline 
WA_REA42_STR-VMODUS sy-vline 
WA_REA42_STR-AMODUS sy-vline 
WA_REA42_STR-PORTION_DY sy-vline 
WA_REA42_STR-ABLEINH_DY sy-vline 
WA_REA42_STR-GENEREL_DY sy-vline 
WA_REA42_STR-PORTSCHLUE sy-vline 
WA_REA42_STR-ABLHSCHLUE sy-vline 
WA_REA42_STR-GENRSCHLUE sy-vline 
WA_REA42_STR-RAHMEN1 sy-vline 
WA_REA42_STR-RAHMEN2 sy-vline 
WA_REA42_STR-RAHMEN3 sy-vline 
WA_REA42_STR-RAHMEN4 sy-vline 
WA_REA42_STR-ALLGTEXT sy-vline 
WA_REA42_STR-ALLGTEXT2 sy-vline 
WA_REA42_STR-ABPKAR sy-vline      INTO ld_text SEPARATED BY SPACE.

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