ABAP Select data from SAP table REAJ_PARAM_FREE into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM REAJ_PARAM_FREE
*  INTO TABLE @DATA(IT_REAJ_PARAM_FREE2).
*--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_REAJ_PARAM_FREE INDEX 1 INTO DATA(WA_REAJ_PARAM_FREE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<REAJ_PARAM_FREE>-CONTRACTTYPE = 1.
<REAJ_PARAM_FREE>-USAGETYPE = 1.
<REAJ_PARAM_FREE>-CONDTYPE = 1.
<REAJ_PARAM_FREE>-CARRYOVERCT = 1.
<REAJ_PARAM_FREE>-VALUEPERCENT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_REAJ_PARAM_FREE-VALUEABSINC, sy-vline,
  WA_REAJ_PARAM_FREE-VALUEABSOLUTE, sy-vline,
  WA_REAJ_PARAM_FREE-VALUEREFER, sy-vline,
  WA_REAJ_PARAM_FREE-DIFFREFE, sy-vline,
  WA_REAJ_PARAM_FREE-TAKEVALUE, sy-vline,
  WA_REAJ_PARAM_FREE-NEWCOND, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_REAJ_PARAM_FREE 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_REAJ_PARAM_FREE 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_REAJ_PARAM_FREE INTO WA_REAJ_PARAM_FREE.


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

*Conversion exit ALPHA, internal->external for field CARRYOVERCT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_REAJ_PARAM_FREE-CARRYOVERCT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REAJ_PARAM_FREE-CARRYOVERCT.
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_REAJ_PARAM_FREE_STR, 
CONTRACTTYPE TYPE STRING,
USAGETYPE TYPE STRING,
CONDTYPE TYPE STRING,
CARRYOVERCT TYPE STRING,
VALUEPERCENT TYPE STRING,
VALUEABSINC TYPE STRING,
VALUEABSOLUTE TYPE STRING,
VALUEREFER TYPE STRING,
DIFFREFE TYPE STRING,
TAKEVALUE TYPE STRING,
NEWCOND TYPE STRING,
CURRENCY TYPE STRING,
DIFFCURR TYPE STRING,
FREQUENCY TYPE STRING,
FREQUENCYUNIT TYPE STRING,
DIFFRHYT TYPE STRING,
CALCRULE TYPE STRING,
CALCRULEPARA1 TYPE STRING,
CALCRULEPARA2 TYPE STRING,
DIFFCALC TYPE STRING,
CONDPURPOSEEXT TYPE STRING,
ALLCOND TYPE STRING,END OF T_EKKO_STR.
DATA: WA_REAJ_PARAM_FREE_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_REAJ_PARAM_FREE_STR-CONTRACTTYPE sy-vline 
WA_REAJ_PARAM_FREE_STR-USAGETYPE sy-vline 
WA_REAJ_PARAM_FREE_STR-CONDTYPE sy-vline 
WA_REAJ_PARAM_FREE_STR-CARRYOVERCT sy-vline 
WA_REAJ_PARAM_FREE_STR-VALUEPERCENT sy-vline 
WA_REAJ_PARAM_FREE_STR-VALUEABSINC sy-vline 
WA_REAJ_PARAM_FREE_STR-VALUEABSOLUTE sy-vline 
WA_REAJ_PARAM_FREE_STR-VALUEREFER sy-vline 
WA_REAJ_PARAM_FREE_STR-DIFFREFE sy-vline 
WA_REAJ_PARAM_FREE_STR-TAKEVALUE sy-vline 
WA_REAJ_PARAM_FREE_STR-NEWCOND sy-vline 
WA_REAJ_PARAM_FREE_STR-CURRENCY sy-vline 
WA_REAJ_PARAM_FREE_STR-DIFFCURR sy-vline 
WA_REAJ_PARAM_FREE_STR-FREQUENCY sy-vline 
WA_REAJ_PARAM_FREE_STR-FREQUENCYUNIT sy-vline 
WA_REAJ_PARAM_FREE_STR-DIFFRHYT sy-vline 
WA_REAJ_PARAM_FREE_STR-CALCRULE sy-vline 
WA_REAJ_PARAM_FREE_STR-CALCRULEPARA1 sy-vline 
WA_REAJ_PARAM_FREE_STR-CALCRULEPARA2 sy-vline 
WA_REAJ_PARAM_FREE_STR-DIFFCALC sy-vline 
WA_REAJ_PARAM_FREE_STR-CONDPURPOSEEXT sy-vline 
WA_REAJ_PARAM_FREE_STR-ALLCOND sy-vline      INTO ld_text SEPARATED BY SPACE.

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