ABAP Select data from SAP table VIAJRECCOMP into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM VIAJRECCOMP
*  INTO TABLE @DATA(IT_VIAJRECCOMP2).
*--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_VIAJRECCOMP INDEX 1 INTO DATA(WA_VIAJRECCOMP2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<VIAJRECCOMP>-MANDT = 1.
<VIAJRECCOMP>-RECCOMPGUID = 1.
<VIAJRECCOMP>-PROCESSGUID = 1.
<VIAJRECCOMP>-INTRENO = 1.
<VIAJRECCOMP>-COMPGRPINTRENO = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_VIAJRECCOMP-BUKRS, sy-vline,
  WA_VIAJRECCOMP-COMPGRP, sy-vline,
  WA_VIAJRECCOMP-COMPADJM, sy-vline,
  WA_VIAJRECCOMP-USEAVERAGE, sy-vline,
  WA_VIAJRECCOMP-COMPMEAS, sy-vline,
  WA_VIAJRECCOMP-COMPUNIT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_VIAJRECCOMP 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_VIAJRECCOMP 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_VIAJRECCOMP INTO WA_VIAJRECCOMP.


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

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

*Conversion exit CUNIT, internal->external for field COMPUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_VIAJRECCOMP-COMPUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VIAJRECCOMP-COMPUNIT.
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_VIAJRECCOMP_STR, 
MANDT TYPE STRING,
RECCOMPGUID TYPE STRING,
PROCESSGUID TYPE STRING,
INTRENO TYPE STRING,
COMPGRPINTRENO TYPE STRING,
BUKRS TYPE STRING,
COMPGRP TYPE STRING,
COMPADJM TYPE STRING,
USEAVERAGE TYPE STRING,
COMPMEAS TYPE STRING,
COMPUNIT TYPE STRING,
CONDPURPOSE TYPE STRING,
INCLINTERN TYPE STRING,
ROOBJNR TYPE STRING,
UNITPRICE TYPE STRING,
CURRENCY TYPE STRING,
CONDVALUE TYPE STRING,
COMPMEASVALUE TYPE STRING,
COMPVALUEMEAS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_VIAJRECCOMP_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_VIAJRECCOMP_STR-MANDT sy-vline 
WA_VIAJRECCOMP_STR-RECCOMPGUID sy-vline 
WA_VIAJRECCOMP_STR-PROCESSGUID sy-vline 
WA_VIAJRECCOMP_STR-INTRENO sy-vline 
WA_VIAJRECCOMP_STR-COMPGRPINTRENO sy-vline 
WA_VIAJRECCOMP_STR-BUKRS sy-vline 
WA_VIAJRECCOMP_STR-COMPGRP sy-vline 
WA_VIAJRECCOMP_STR-COMPADJM sy-vline 
WA_VIAJRECCOMP_STR-USEAVERAGE sy-vline 
WA_VIAJRECCOMP_STR-COMPMEAS sy-vline 
WA_VIAJRECCOMP_STR-COMPUNIT sy-vline 
WA_VIAJRECCOMP_STR-CONDPURPOSE sy-vline 
WA_VIAJRECCOMP_STR-INCLINTERN sy-vline 
WA_VIAJRECCOMP_STR-ROOBJNR sy-vline 
WA_VIAJRECCOMP_STR-UNITPRICE sy-vline 
WA_VIAJRECCOMP_STR-CURRENCY sy-vline 
WA_VIAJRECCOMP_STR-CONDVALUE sy-vline 
WA_VIAJRECCOMP_STR-COMPMEASVALUE sy-vline 
WA_VIAJRECCOMP_STR-COMPVALUEMEAS sy-vline      INTO ld_text SEPARATED BY SPACE.

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