ABAP Select data from SAP table WVLBPOPRKEY into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WVLBPOPRKEY
*  INTO TABLE @DATA(IT_WVLBPOPRKEY2).
*--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_WVLBPOPRKEY INDEX 1 INTO DATA(WA_WVLBPOPRKEY2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WVLBPOPRKEY>-EBELN = 1.
<WVLBPOPRKEY>-BANFN = 1.
<WVLBPOPRKEY>-LIFNR = 1.
<WVLBPOPRKEY>-WERKS = 1.
<WVLBPOPRKEY>-LTSNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WVLBPOPRKEY-EKORG, sy-vline,
  WA_WVLBPOPRKEY-EKGRP, sy-vline,
  WA_WVLBPOPRKEY-MATNR, sy-vline,
  WA_WVLBPOPRKEY-MATKL, sy-vline,
  WA_WVLBPOPRKEY-IDNLF, sy-vline,
  WA_WVLBPOPRKEY-MENGE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WVLBPOPRKEY 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_WVLBPOPRKEY 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_WVLBPOPRKEY INTO WA_WVLBPOPRKEY.


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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

*Conversion exit CUNIT, internal->external for field GEWEIN
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_WVLBPOPRKEY-GEWEIN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WVLBPOPRKEY-GEWEIN.
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_WVLBPOPRKEY_STR, 
EBELN TYPE STRING,
BANFN TYPE STRING,
LIFNR TYPE STRING,
WERKS TYPE STRING,
LTSNR TYPE STRING,
EKORG TYPE STRING,
EKGRP TYPE STRING,
MATNR TYPE STRING,
MATKL TYPE STRING,
IDNLF TYPE STRING,
MENGE TYPE STRING,
MEINS 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,
KONNR TYPE STRING,
KTPNR TYPE STRING,
KMEINH TYPE STRING,
KUMREZ TYPE STRING,
KUMREN TYPE STRING,
I_POSNR TYPE STRING,
SUBMI TYPE STRING,
BSART TYPE STRING,
DAILY_FORECAST TYPE STRING,
QTYONHND TYPE STRING,
QTYONORD TYPE STRING,
CURWEKSA TYPE STRING,
RGOFCOV TYPE STRING,
CURODVAL TYPE STRING,
CURODVOL TYPE STRING,
CURODWGT TYPE STRING,
LGRAD TYPE STRING,
WAERS TYPE STRING,
VOLEH TYPE STRING,
GEWEI TYPE STRING,
BSTME TYPE STRING,
MHDHB TYPE STRING,
CURODWGTN TYPE STRING,
GEWEIN TYPE STRING,
CURODPUN TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WVLBPOPRKEY_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_WVLBPOPRKEY_STR-EBELN sy-vline 
WA_WVLBPOPRKEY_STR-BANFN sy-vline 
WA_WVLBPOPRKEY_STR-LIFNR sy-vline 
WA_WVLBPOPRKEY_STR-WERKS sy-vline 
WA_WVLBPOPRKEY_STR-LTSNR sy-vline 
WA_WVLBPOPRKEY_STR-EKORG sy-vline 
WA_WVLBPOPRKEY_STR-EKGRP sy-vline 
WA_WVLBPOPRKEY_STR-MATNR sy-vline 
WA_WVLBPOPRKEY_STR-MATKL sy-vline 
WA_WVLBPOPRKEY_STR-IDNLF sy-vline 
WA_WVLBPOPRKEY_STR-MENGE sy-vline 
WA_WVLBPOPRKEY_STR-MEINS sy-vline 
WA_WVLBPOPRKEY_STR-R_ITEM sy-vline 
WA_WVLBPOPRKEY_STR-MATNR sy-vline 
WA_WVLBPOPRKEY_STR-MENGE sy-vline 
WA_WVLBPOPRKEY_STR-OLDMG sy-vline 
WA_WVLBPOPRKEY_STR-MEINS sy-vline 
WA_WVLBPOPRKEY_STR-WERKS sy-vline 
WA_WVLBPOPRKEY_STR-AKTNR sy-vline 
WA_WVLBPOPRKEY_STR-LGORT sy-vline 
WA_WVLBPOPRKEY_STR-WAERS sy-vline 
WA_WVLBPOPRKEY_STR-BPUMZ sy-vline 
WA_WVLBPOPRKEY_STR-BPUMN sy-vline 
WA_WVLBPOPRKEY_STR-UMREZ sy-vline 
WA_WVLBPOPRKEY_STR-UMREN sy-vline 
WA_WVLBPOPRKEY_STR-PREIS sy-vline 
WA_WVLBPOPRKEY_STR-LAENG sy-vline 
WA_WVLBPOPRKEY_STR-BREIT sy-vline 
WA_WVLBPOPRKEY_STR-HOEHE sy-vline 
WA_WVLBPOPRKEY_STR-MEABM sy-vline 
WA_WVLBPOPRKEY_STR-VOLUM sy-vline 
WA_WVLBPOPRKEY_STR-VOLEH sy-vline 
WA_WVLBPOPRKEY_STR-BRGEW sy-vline 
WA_WVLBPOPRKEY_STR-GEWEI sy-vline 
WA_WVLBPOPRKEY_STR-NTGEW sy-vline 
WA_WVLBPOPRKEY_STR-EKORG sy-vline 
WA_WVLBPOPRKEY_STR-INFNR sy-vline 
WA_WVLBPOPRKEY_STR-UEBPO sy-vline 
WA_WVLBPOPRKEY_STR-UPVOR sy-vline 
WA_WVLBPOPRKEY_STR-EBELN sy-vline 
WA_WVLBPOPRKEY_STR-EBELP sy-vline 
WA_WVLBPOPRKEY_STR-STAPO sy-vline 
WA_WVLBPOPRKEY_STR-ATTYP sy-vline 
WA_WVLBPOPRKEY_STR-DONT_CALC sy-vline 
WA_WVLBPOPRKEY_STR-KONNR sy-vline 
WA_WVLBPOPRKEY_STR-KTPNR sy-vline 
WA_WVLBPOPRKEY_STR-KMEINH sy-vline 
WA_WVLBPOPRKEY_STR-KUMREZ sy-vline 
WA_WVLBPOPRKEY_STR-KUMREN sy-vline 
WA_WVLBPOPRKEY_STR-I_POSNR sy-vline 
WA_WVLBPOPRKEY_STR-SUBMI sy-vline 
WA_WVLBPOPRKEY_STR-BSART sy-vline 
WA_WVLBPOPRKEY_STR-DAILY_FORECAST sy-vline 
WA_WVLBPOPRKEY_STR-QTYONHND sy-vline 
WA_WVLBPOPRKEY_STR-QTYONORD sy-vline 
WA_WVLBPOPRKEY_STR-CURWEKSA sy-vline 
WA_WVLBPOPRKEY_STR-RGOFCOV sy-vline 
WA_WVLBPOPRKEY_STR-CURODVAL sy-vline 
WA_WVLBPOPRKEY_STR-CURODVOL sy-vline 
WA_WVLBPOPRKEY_STR-CURODWGT sy-vline 
WA_WVLBPOPRKEY_STR-LGRAD sy-vline 
WA_WVLBPOPRKEY_STR-WAERS sy-vline 
WA_WVLBPOPRKEY_STR-VOLEH sy-vline 
WA_WVLBPOPRKEY_STR-GEWEI sy-vline 
WA_WVLBPOPRKEY_STR-BSTME sy-vline 
WA_WVLBPOPRKEY_STR-MHDHB sy-vline 
WA_WVLBPOPRKEY_STR-CURODWGTN sy-vline 
WA_WVLBPOPRKEY_STR-GEWEIN sy-vline 
WA_WVLBPOPRKEY_STR-CURODPUN sy-vline      INTO ld_text SEPARATED BY SPACE.

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