ABAP Select data from SAP table WVLBARTICLES into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WVLBARTICLES
*  INTO TABLE @DATA(IT_WVLBARTICLES2).
*--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_WVLBARTICLES INDEX 1 INTO DATA(WA_WVLBARTICLES2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WVLBARTICLES>-LIFNR = 1.
<WVLBARTICLES>-WERKS = 1.
<WVLBARTICLES>-MATNR = 1.
<WVLBARTICLES>-LTSNR = 1.
<WVLBARTICLES>-EKORG = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WVLBARTICLES-MATKL, sy-vline,
  WA_WVLBARTICLES-IDNLF, sy-vline,
  WA_WVLBARTICLES-NETPR, sy-vline,
  WA_WVLBARTICLES-PLIFZ, sy-vline,
  WA_WVLBARTICLES-KAUTB, sy-vline,
  WA_WVLBARTICLES-LGRAD, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WVLBARTICLES 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_WVLBARTICLES 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_WVLBARTICLES INTO WA_WVLBARTICLES.


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

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_WVLBARTICLES-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WVLBARTICLES-MATNR.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit MATN1, internal->external for field SATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_WVLBARTICLES-SATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WVLBARTICLES-SATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_WVLBARTICLES-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WVLBARTICLES-MATNR.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

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

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

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

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

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

*Conversion exit ALPHA, internal->external for field INFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_WVLBARTICLES-INFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WVLBARTICLES-INFNR.
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_WVLBARTICLES_STR, 
LIFNR TYPE STRING,
WERKS TYPE STRING,
MATNR TYPE STRING,
LTSNR TYPE STRING,
EKORG TYPE STRING,
MATKL TYPE STRING,
IDNLF TYPE STRING,
NETPR TYPE STRING,
PLIFZ TYPE STRING,
KAUTB TYPE STRING,
LGRAD TYPE STRING,
EKGRP TYPE STRING,
MEINS TYPE STRING,
ATTYP TYPE STRING,
SATNR TYPE STRING,
WMAKG TYPE STRING,
MHDHB TYPE STRING,
REGULAR_STOCK TYPE STRING,
PROMO_STOCK TYPE STRING,
PRICE TYPE STRING,
RELIF TYPE STRING,
DAILY_FORECAST TYPE STRING,
END_DATE_T0 TYPE STRING,
END_DATE_T1 TYPE STRING,
END_DATE_T2 TYPE STRING,
NUM_FKDAY_T0 TYPE STRING,
NUM_FKDAY_T1 TYPE STRING,
NUM_FKDAY_T2 TYPE STRING,
SALE_STOCK_T0 TYPE STRING,
SALE_STOCK_T1 TYPE STRING,
SALE_STOCK_T2 TYPE STRING,
R_ITEM TYPE STRING,
MATNR TYPE STRING,
MENGE TYPE STRING,
OLDMG TYPE STRING,
MEINS TYPE STRING,
WERKS TYPE STRING,
AKTNR TYPE STRING,
LGORT TYPE STRING,
WAERS TYPE STRING,
BPUMZ TYPE STRING,
BPUMN TYPE STRING,
UMREZ TYPE STRING,
UMREN TYPE STRING,
PREIS TYPE STRING,
LAENG TYPE STRING,
BREIT TYPE STRING,
HOEHE TYPE STRING,
MEABM TYPE STRING,
VOLUM TYPE STRING,
VOLEH TYPE STRING,
BRGEW TYPE STRING,
GEWEI TYPE STRING,
NTGEW TYPE STRING,
EKORG TYPE STRING,
INFNR TYPE STRING,
UEBPO TYPE STRING,
UPVOR TYPE STRING,
EBELN TYPE STRING,
EBELP TYPE STRING,
STAPO TYPE STRING,
ATTYP TYPE STRING,
DONT_CALC TYPE STRING,
NO_KONNR_CHECK TYPE STRING,
KONNR TYPE STRING,
KTPNR TYPE STRING,
KMEINH TYPE STRING,
KUMREZ TYPE STRING,
KUMREN TYPE STRING,
PERKZ TYPE STRING,
PERIV TYPE STRING,
INFNR TYPE STRING,
DISMM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WVLBARTICLES_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_WVLBARTICLES_STR-LIFNR sy-vline 
WA_WVLBARTICLES_STR-WERKS sy-vline 
WA_WVLBARTICLES_STR-MATNR sy-vline 
WA_WVLBARTICLES_STR-LTSNR sy-vline 
WA_WVLBARTICLES_STR-EKORG sy-vline 
WA_WVLBARTICLES_STR-MATKL sy-vline 
WA_WVLBARTICLES_STR-IDNLF sy-vline 
WA_WVLBARTICLES_STR-NETPR sy-vline 
WA_WVLBARTICLES_STR-PLIFZ sy-vline 
WA_WVLBARTICLES_STR-KAUTB sy-vline 
WA_WVLBARTICLES_STR-LGRAD sy-vline 
WA_WVLBARTICLES_STR-EKGRP sy-vline 
WA_WVLBARTICLES_STR-MEINS sy-vline 
WA_WVLBARTICLES_STR-ATTYP sy-vline 
WA_WVLBARTICLES_STR-SATNR sy-vline 
WA_WVLBARTICLES_STR-WMAKG sy-vline 
WA_WVLBARTICLES_STR-MHDHB sy-vline 
WA_WVLBARTICLES_STR-REGULAR_STOCK sy-vline 
WA_WVLBARTICLES_STR-PROMO_STOCK sy-vline 
WA_WVLBARTICLES_STR-PRICE sy-vline 
WA_WVLBARTICLES_STR-RELIF sy-vline 
WA_WVLBARTICLES_STR-DAILY_FORECAST sy-vline 
WA_WVLBARTICLES_STR-END_DATE_T0 sy-vline 
WA_WVLBARTICLES_STR-END_DATE_T1 sy-vline 
WA_WVLBARTICLES_STR-END_DATE_T2 sy-vline 
WA_WVLBARTICLES_STR-NUM_FKDAY_T0 sy-vline 
WA_WVLBARTICLES_STR-NUM_FKDAY_T1 sy-vline 
WA_WVLBARTICLES_STR-NUM_FKDAY_T2 sy-vline 
WA_WVLBARTICLES_STR-SALE_STOCK_T0 sy-vline 
WA_WVLBARTICLES_STR-SALE_STOCK_T1 sy-vline 
WA_WVLBARTICLES_STR-SALE_STOCK_T2 sy-vline 
WA_WVLBARTICLES_STR-R_ITEM sy-vline 
WA_WVLBARTICLES_STR-MATNR sy-vline 
WA_WVLBARTICLES_STR-MENGE sy-vline 
WA_WVLBARTICLES_STR-OLDMG sy-vline 
WA_WVLBARTICLES_STR-MEINS sy-vline 
WA_WVLBARTICLES_STR-WERKS sy-vline 
WA_WVLBARTICLES_STR-AKTNR sy-vline 
WA_WVLBARTICLES_STR-LGORT sy-vline 
WA_WVLBARTICLES_STR-WAERS sy-vline 
WA_WVLBARTICLES_STR-BPUMZ sy-vline 
WA_WVLBARTICLES_STR-BPUMN sy-vline 
WA_WVLBARTICLES_STR-UMREZ sy-vline 
WA_WVLBARTICLES_STR-UMREN sy-vline 
WA_WVLBARTICLES_STR-PREIS sy-vline 
WA_WVLBARTICLES_STR-LAENG sy-vline 
WA_WVLBARTICLES_STR-BREIT sy-vline 
WA_WVLBARTICLES_STR-HOEHE sy-vline 
WA_WVLBARTICLES_STR-MEABM sy-vline 
WA_WVLBARTICLES_STR-VOLUM sy-vline 
WA_WVLBARTICLES_STR-VOLEH sy-vline 
WA_WVLBARTICLES_STR-BRGEW sy-vline 
WA_WVLBARTICLES_STR-GEWEI sy-vline 
WA_WVLBARTICLES_STR-NTGEW sy-vline 
WA_WVLBARTICLES_STR-EKORG sy-vline 
WA_WVLBARTICLES_STR-INFNR sy-vline 
WA_WVLBARTICLES_STR-UEBPO sy-vline 
WA_WVLBARTICLES_STR-UPVOR sy-vline 
WA_WVLBARTICLES_STR-EBELN sy-vline 
WA_WVLBARTICLES_STR-EBELP sy-vline 
WA_WVLBARTICLES_STR-STAPO sy-vline 
WA_WVLBARTICLES_STR-ATTYP sy-vline 
WA_WVLBARTICLES_STR-DONT_CALC sy-vline 
WA_WVLBARTICLES_STR-NO_KONNR_CHECK sy-vline 
WA_WVLBARTICLES_STR-KONNR sy-vline 
WA_WVLBARTICLES_STR-KTPNR sy-vline 
WA_WVLBARTICLES_STR-KMEINH sy-vline 
WA_WVLBARTICLES_STR-KUMREZ sy-vline 
WA_WVLBARTICLES_STR-KUMREN sy-vline 
WA_WVLBARTICLES_STR-PERKZ sy-vline 
WA_WVLBARTICLES_STR-PERIV sy-vline 
WA_WVLBARTICLES_STR-INFNR sy-vline 
WA_WVLBARTICLES_STR-DISMM sy-vline      INTO ld_text SEPARATED BY SPACE.

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