ABAP Select data from SAP table REA66 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP REA66 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 REA66. 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 REA66 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_REA66 TYPE STANDARD TABLE OF REA66,
      WA_REA66 TYPE REA66,
      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: <REA66> TYPE REA66.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_REA66.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM REA66
  INTO TABLE IT_REA66.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM REA66
*  INTO TABLE @DATA(IT_REA662).
*--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_REA66 INDEX 1 INTO DATA(WA_REA662).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_REA66 ASSIGNING <REA66>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<REA66>-SUBSPARTE = 1.
<REA66>-VERTRAG = 1.
<REA66>-ANPASSEN = 1.
<REA66>-AKTSUBNR = 1.
<REA66>-ABSLBETRAG = 1.

ENDLOOP.

LOOP AT IT_REA66 INTO WA_REA66.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_REA66-RESBETRAG, sy-vline,
  WA_REA66-FAELBETRS, sy-vline,
  WA_REA66-NAENDBTRS, sy-vline,
  WA_REA66-EINANFBERS, sy-vline,
  WA_REA66-VORAUSZBTS, sy-vline,
  WA_REA66-ANPBETRS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_REA66 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_REA66 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_REA66 INTO WA_REA66.


*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 VERTRAG
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_REA66-VERTRAG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REA66-VERTRAG.
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_REA66_STR, 
SUBSPARTE TYPE STRING,
VERTRAG TYPE STRING,
ANPASSEN TYPE STRING,
AKTSUBNR TYPE STRING,
ABSLBETRAG TYPE STRING,
RESBETRAG TYPE STRING,
FAELBETRS TYPE STRING,
NAENDBTRS TYPE STRING,
EINANFBERS TYPE STRING,
VORAUSZBTS TYPE STRING,
ANPBETRS TYPE STRING,
GBANPFAK TYPE STRING,
FREMDAUF TYPE STRING,
ABSBETRG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_REA66_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_REA66_STR-SUBSPARTE sy-vline 
WA_REA66_STR-VERTRAG sy-vline 
WA_REA66_STR-ANPASSEN sy-vline 
WA_REA66_STR-AKTSUBNR sy-vline 
WA_REA66_STR-ABSLBETRAG sy-vline 
WA_REA66_STR-RESBETRAG sy-vline 
WA_REA66_STR-FAELBETRS sy-vline 
WA_REA66_STR-NAENDBTRS sy-vline 
WA_REA66_STR-EINANFBERS sy-vline 
WA_REA66_STR-VORAUSZBTS sy-vline 
WA_REA66_STR-ANPBETRS sy-vline 
WA_REA66_STR-GBANPFAK sy-vline 
WA_REA66_STR-FREMDAUF sy-vline 
WA_REA66_STR-ABSBETRG sy-vline      INTO ld_text SEPARATED BY SPACE.

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