ABAP Select data from SAP table REAJ_PRESTAGE into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP REAJ_PRESTAGE 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_PRESTAGE. 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_PRESTAGE 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_PRESTAGE TYPE STANDARD TABLE OF REAJ_PRESTAGE,
      WA_REAJ_PRESTAGE TYPE REAJ_PRESTAGE,
      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_PRESTAGE> TYPE REAJ_PRESTAGE.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM REAJ_PRESTAGE
*  INTO TABLE @DATA(IT_REAJ_PRESTAGE2).
*--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_PRESTAGE INDEX 1 INTO DATA(WA_REAJ_PRESTAGE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<REAJ_PRESTAGE>-MANDT = 1.
<REAJ_PRESTAGE>-CEAPRESTGGUID = 1.
<REAJ_PRESTAGE>-EXPPOSGUID = 1.
<REAJ_PRESTAGE>-PRESTGNO = 1.
<REAJ_PRESTAGE>-INTRENO = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_REAJ_PRESTAGE-OBJNR, sy-vline,
  WA_REAJ_PRESTAGE-ADJMTAKE, sy-vline,
  WA_REAJ_PRESTAGE-ADJMDECLINED, sy-vline,
  WA_REAJ_PRESTAGE-ADJMREASON, sy-vline,
  WA_REAJ_PRESTAGE-ADJMREASONCEA, sy-vline,
  WA_REAJ_PRESTAGE-ADJMCOMMENT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_REAJ_PRESTAGE 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_PRESTAGE 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_PRESTAGE INTO WA_REAJ_PRESTAGE.


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

*Conversion exit ALPHA, internal->external for field ADJMREASONCEA
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_REAJ_PRESTAGE-ADJMREASONCEA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REAJ_PRESTAGE-ADJMREASONCEA.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field ACMEASUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_REAJ_PRESTAGE-ACMEASUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REAJ_PRESTAGE-ACMEASUNIT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field ARMEASUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_REAJ_PRESTAGE-ARMEASUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REAJ_PRESTAGE-ARMEASUNIT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field CONDTYPE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_REAJ_PRESTAGE-CONDTYPE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REAJ_PRESTAGE-CONDTYPE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field CONDTYPEMAIN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_REAJ_PRESTAGE-CONDTYPEMAIN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REAJ_PRESTAGE-CONDTYPEMAIN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field CONDTYPEREF
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_REAJ_PRESTAGE-CONDTYPEREF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REAJ_PRESTAGE-CONDTYPEREF.
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_PRESTAGE_STR, 
MANDT TYPE STRING,
CEAPRESTGGUID TYPE STRING,
EXPPOSGUID TYPE STRING,
PRESTGNO TYPE STRING,
INTRENO TYPE STRING,
OBJNR TYPE STRING,
ADJMTAKE TYPE STRING,
ADJMDECLINED TYPE STRING,
ADJMREASON TYPE STRING,
ADJMREASONCEA TYPE STRING,
ADJMCOMMENT TYPE STRING,
ACMEASVALUE TYPE STRING,
ACMEASUNIT TYPE STRING,
ARMEASVALUE TYPE STRING,
ARMEASUNIT TYPE STRING,
ADJMAMTRHYCALC TYPE STRING,
ADJMAMTRHYMOD TYPE STRING,
ADJMAMTRHYICALC TYPE STRING,
ADJMAMTRHYIMOD TYPE STRING,
ADJMFROMCALC TYPE STRING,
ADJMFROMMOD TYPE STRING,
CONDTYPE TYPE STRING,
CONDTYPEMAIN TYPE STRING,
CONDTYPEREF TYPE STRING,
RECGROUPGUID TYPE STRING,
ADJMRECSTEPNO TYPE STRING,
RECGENERATEEND TYPE STRING,
ENDFORPRESTGGUID TYPE STRING,
SUPCEAPRESTGGUID TYPE STRING,
ADJMPSSEQNO TYPE STRING,
ADJMBLOCKED TYPE STRING,
FDELETE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_REAJ_PRESTAGE_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_PRESTAGE_STR-MANDT sy-vline 
WA_REAJ_PRESTAGE_STR-CEAPRESTGGUID sy-vline 
WA_REAJ_PRESTAGE_STR-EXPPOSGUID sy-vline 
WA_REAJ_PRESTAGE_STR-PRESTGNO sy-vline 
WA_REAJ_PRESTAGE_STR-INTRENO sy-vline 
WA_REAJ_PRESTAGE_STR-OBJNR sy-vline 
WA_REAJ_PRESTAGE_STR-ADJMTAKE sy-vline 
WA_REAJ_PRESTAGE_STR-ADJMDECLINED sy-vline 
WA_REAJ_PRESTAGE_STR-ADJMREASON sy-vline 
WA_REAJ_PRESTAGE_STR-ADJMREASONCEA sy-vline 
WA_REAJ_PRESTAGE_STR-ADJMCOMMENT sy-vline 
WA_REAJ_PRESTAGE_STR-ACMEASVALUE sy-vline 
WA_REAJ_PRESTAGE_STR-ACMEASUNIT sy-vline 
WA_REAJ_PRESTAGE_STR-ARMEASVALUE sy-vline 
WA_REAJ_PRESTAGE_STR-ARMEASUNIT sy-vline 
WA_REAJ_PRESTAGE_STR-ADJMAMTRHYCALC sy-vline 
WA_REAJ_PRESTAGE_STR-ADJMAMTRHYMOD sy-vline 
WA_REAJ_PRESTAGE_STR-ADJMAMTRHYICALC sy-vline 
WA_REAJ_PRESTAGE_STR-ADJMAMTRHYIMOD sy-vline 
WA_REAJ_PRESTAGE_STR-ADJMFROMCALC sy-vline 
WA_REAJ_PRESTAGE_STR-ADJMFROMMOD sy-vline 
WA_REAJ_PRESTAGE_STR-CONDTYPE sy-vline 
WA_REAJ_PRESTAGE_STR-CONDTYPEMAIN sy-vline 
WA_REAJ_PRESTAGE_STR-CONDTYPEREF sy-vline 
WA_REAJ_PRESTAGE_STR-RECGROUPGUID sy-vline 
WA_REAJ_PRESTAGE_STR-ADJMRECSTEPNO sy-vline 
WA_REAJ_PRESTAGE_STR-RECGENERATEEND sy-vline 
WA_REAJ_PRESTAGE_STR-ENDFORPRESTGGUID sy-vline 
WA_REAJ_PRESTAGE_STR-SUPCEAPRESTGGUID sy-vline 
WA_REAJ_PRESTAGE_STR-ADJMPSSEQNO sy-vline 
WA_REAJ_PRESTAGE_STR-ADJMBLOCKED sy-vline 
WA_REAJ_PRESTAGE_STR-FDELETE sy-vline      INTO ld_text SEPARATED BY SPACE.

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