ABAP Select data from SAP table REAJ_PARAM_FREE_L 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_L 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_L. 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_L 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_L TYPE STANDARD TABLE OF REAJ_PARAM_FREE_L,
      WA_REAJ_PARAM_FREE_L TYPE REAJ_PARAM_FREE_L,
      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_L> TYPE REAJ_PARAM_FREE_L.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM REAJ_PARAM_FREE_L
*  INTO TABLE @DATA(IT_REAJ_PARAM_FREE_L2).
*--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_L INDEX 1 INTO DATA(WA_REAJ_PARAM_FREE_L2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<REAJ_PARAM_FREE_L>-CONTRACTTYPE = 1.
<REAJ_PARAM_FREE_L>-XCONTRACTTYPE = 1.
<REAJ_PARAM_FREE_L>-USAGETYPE = 1.
<REAJ_PARAM_FREE_L>-XUSAGETYPE = 1.
<REAJ_PARAM_FREE_L>-CONDTYPE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_REAJ_PARAM_FREE_L-XCONDTYPE, sy-vline,
  WA_REAJ_PARAM_FREE_L-CONDPURPOSEEXT, sy-vline,
  WA_REAJ_PARAM_FREE_L-XCONDPURPOSEEXT, sy-vline,
  WA_REAJ_PARAM_FREE_L-CARRYOVERCT, sy-vline,
  WA_REAJ_PARAM_FREE_L-XCARRYOVERCT, sy-vline,
  WA_REAJ_PARAM_FREE_L-VALUEPERCENT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_REAJ_PARAM_FREE_L 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_L 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_L INTO WA_REAJ_PARAM_FREE_L.


*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_L-CONDTYPE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REAJ_PARAM_FREE_L-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_L-CARRYOVERCT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REAJ_PARAM_FREE_L-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_L_STR, 
CONTRACTTYPE TYPE STRING,
XCONTRACTTYPE TYPE STRING,
USAGETYPE TYPE STRING,
XUSAGETYPE TYPE STRING,
CONDTYPE TYPE STRING,
XCONDTYPE TYPE STRING,
CONDPURPOSEEXT TYPE STRING,
XCONDPURPOSEEXT TYPE STRING,
CARRYOVERCT TYPE STRING,
XCARRYOVERCT TYPE STRING,
VALUEPERCENT TYPE STRING,
VALUEABSINC TYPE STRING,
VALUEABSOLUTE TYPE STRING,
VALUEREFER TYPE STRING,
XVALUEREFER TYPE STRING,
DIFFREFE TYPE STRING,
XDIFFREFE TYPE STRING,
TAKEVALUE TYPE STRING,
NEWCOND TYPE STRING,
CURRENCY TYPE STRING,
DIFFCURR TYPE STRING,
XDIFFCURR TYPE STRING,
FREQUENCY TYPE STRING,
FREQUENCYUNIT TYPE STRING,
XFREQUENCYUNIT TYPE STRING,
DIFFRHYT TYPE STRING,
XDIFFRHYT TYPE STRING,
CALCRULE TYPE STRING,
XCALCRULE TYPE STRING,
CALCRULEPARA1 TYPE STRING,
XCALCRULEPARA1 TYPE STRING,
CALCRULEPARA2 TYPE STRING,
XCALCRULEPARA2 TYPE STRING,
DIFFCALC TYPE STRING,
XDIFFCALC TYPE STRING,
COLORTAB TYPE STRING,
CELLTAB TYPE STRING,
DD_HANDLE_1 TYPE STRING,
DD_HANDLE_2 TYPE STRING,
DISABLE_PARA1 TYPE STRING,
DISABLE_PARA2 TYPE STRING,
ALLCOND TYPE STRING,END OF T_EKKO_STR.
DATA: WA_REAJ_PARAM_FREE_L_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_L_STR-CONTRACTTYPE sy-vline 
WA_REAJ_PARAM_FREE_L_STR-XCONTRACTTYPE sy-vline 
WA_REAJ_PARAM_FREE_L_STR-USAGETYPE sy-vline 
WA_REAJ_PARAM_FREE_L_STR-XUSAGETYPE sy-vline 
WA_REAJ_PARAM_FREE_L_STR-CONDTYPE sy-vline 
WA_REAJ_PARAM_FREE_L_STR-XCONDTYPE sy-vline 
WA_REAJ_PARAM_FREE_L_STR-CONDPURPOSEEXT sy-vline 
WA_REAJ_PARAM_FREE_L_STR-XCONDPURPOSEEXT sy-vline 
WA_REAJ_PARAM_FREE_L_STR-CARRYOVERCT sy-vline 
WA_REAJ_PARAM_FREE_L_STR-XCARRYOVERCT sy-vline 
WA_REAJ_PARAM_FREE_L_STR-VALUEPERCENT sy-vline 
WA_REAJ_PARAM_FREE_L_STR-VALUEABSINC sy-vline 
WA_REAJ_PARAM_FREE_L_STR-VALUEABSOLUTE sy-vline 
WA_REAJ_PARAM_FREE_L_STR-VALUEREFER sy-vline 
WA_REAJ_PARAM_FREE_L_STR-XVALUEREFER sy-vline 
WA_REAJ_PARAM_FREE_L_STR-DIFFREFE sy-vline 
WA_REAJ_PARAM_FREE_L_STR-XDIFFREFE sy-vline 
WA_REAJ_PARAM_FREE_L_STR-TAKEVALUE sy-vline 
WA_REAJ_PARAM_FREE_L_STR-NEWCOND sy-vline 
WA_REAJ_PARAM_FREE_L_STR-CURRENCY sy-vline 
WA_REAJ_PARAM_FREE_L_STR-DIFFCURR sy-vline 
WA_REAJ_PARAM_FREE_L_STR-XDIFFCURR sy-vline 
WA_REAJ_PARAM_FREE_L_STR-FREQUENCY sy-vline 
WA_REAJ_PARAM_FREE_L_STR-FREQUENCYUNIT sy-vline 
WA_REAJ_PARAM_FREE_L_STR-XFREQUENCYUNIT sy-vline 
WA_REAJ_PARAM_FREE_L_STR-DIFFRHYT sy-vline 
WA_REAJ_PARAM_FREE_L_STR-XDIFFRHYT sy-vline 
WA_REAJ_PARAM_FREE_L_STR-CALCRULE sy-vline 
WA_REAJ_PARAM_FREE_L_STR-XCALCRULE sy-vline 
WA_REAJ_PARAM_FREE_L_STR-CALCRULEPARA1 sy-vline 
WA_REAJ_PARAM_FREE_L_STR-XCALCRULEPARA1 sy-vline 
WA_REAJ_PARAM_FREE_L_STR-CALCRULEPARA2 sy-vline 
WA_REAJ_PARAM_FREE_L_STR-XCALCRULEPARA2 sy-vline 
WA_REAJ_PARAM_FREE_L_STR-DIFFCALC sy-vline 
WA_REAJ_PARAM_FREE_L_STR-XDIFFCALC sy-vline 
WA_REAJ_PARAM_FREE_L_STR-COLORTAB sy-vline 
WA_REAJ_PARAM_FREE_L_STR-CELLTAB sy-vline 
WA_REAJ_PARAM_FREE_L_STR-DD_HANDLE_1 sy-vline 
WA_REAJ_PARAM_FREE_L_STR-DD_HANDLE_2 sy-vline 
WA_REAJ_PARAM_FREE_L_STR-DISABLE_PARA1 sy-vline 
WA_REAJ_PARAM_FREE_L_STR-DISABLE_PARA2 sy-vline 
WA_REAJ_PARAM_FREE_L_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.