ABAP Select data from SAP table WAKL3 into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP WAKL3 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 WAKL3. 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 WAKL3 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_WAKL3 TYPE STANDARD TABLE OF WAKL3,
      WA_WAKL3 TYPE WAKL3,
      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: <WAKL3> TYPE WAKL3.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_WAKL3.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM WAKL3
  INTO TABLE IT_WAKL3.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WAKL3
*  INTO TABLE @DATA(IT_WAKL32).
*--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_WAKL3 INDEX 1 INTO DATA(WA_WAKL32).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_WAKL3 ASSIGNING <WAKL3>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WAKL3>-NAME1 = 1.
<WAKL3>-CLASS = 1.
<WAKL3>-MAKTX = 1.
<WAKL3>-KLART = 1.
<WAKL3>-MANDT = 1.

ENDLOOP.

LOOP AT IT_WAKL3 INTO WA_WAKL3.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WAKL3-AKTNR, sy-vline,
  WA_WAKL3-ARTNR, sy-vline,
  WA_WAKL3-MEBME, sy-vline,
  WA_WAKL3-KUNNR, sy-vline,
  WA_WAKL3-CLINT, sy-vline,
  WA_WAKL3-WALNR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WAKL3 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_WAKL3 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_WAKL3 INTO WA_WAKL3.


*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 AKTNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_WAKL3-AKTNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WAKL3-AKTNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field ARTNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_WAKL3-ARTNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WAKL3-ARTNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEBME
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_WAKL3-MEBME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WAKL3-MEBME.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KUNNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_WAKL3-KUNNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WAKL3-KUNNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LIFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_WAKL3-LIFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WAKL3-LIFNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field EXTLI
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_WAKL3-EXTLI
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WAKL3-EXTLI.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field VABGM
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_WAKL3-VABGM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WAKL3-VABGM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEBPR
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_WAKL3-MEBPR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WAKL3-MEBPR.
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_WAKL3_STR, 
NAME1 TYPE STRING,
CLASS TYPE STRING,
MAKTX TYPE STRING,
KLART TYPE STRING,
MANDT TYPE STRING,
AKTNR TYPE STRING,
ARTNR TYPE STRING,
MEBME TYPE STRING,
KUNNR TYPE STRING,
CLINT TYPE STRING,
WALNR TYPE STRING,
AKTHE TYPE STRING,
ERLIS TYPE STRING,
GENLI TYPE STRING,
VKORG TYPE STRING,
VTWEG TYPE STRING,
SPART TYPE STRING,
EKORG TYPE STRING,
EKGRP TYPE STRING,
LIFNR TYPE STRING,
LIFTY TYPE STRING,
VZWRK TYPE STRING,
INFWK TYPE STRING,
VZEKO TYPE STRING,
VZVKO TYPE STRING,
VZVTW TYPE STRING,
VZSPA TYPE STRING,
EXTLI TYPE STRING,
BZQFI TYPE STRING,
BEKTB TYPE STRING,
BEKTV TYPE STRING,
ABDTB TYPE STRING,
RUDAB TYPE STRING,
RUDAV TYPE STRING,
RUSTB TYPE STRING,
RUSTV TYPE STRING,
BESTB TYPE STRING,
BESTV TYPE STRING,
AENDB TYPE STRING,
AENDV TYPE STRING,
PLEKP TYPE STRING,
WAEEK TYPE STRING,
PLVKP TYPE STRING,
WAELA TYPE STRING,
EKDAB TYPE STRING,
EKDBI TYPE STRING,
VKDAB TYPE STRING,
VKDBI TYPE STRING,
SPANE TYPE STRING,
SPABR TYPE STRING,
AUFSG TYPE STRING,
VSPAN TYPE STRING,
VSPAB TYPE STRING,
VAUFS TYPE STRING,
VABGM TYPE STRING,
VABGP TYPE STRING,
PARKZ TYPE STRING,
EPEIN TYPE STRING,
VZEPE TYPE STRING,
VPEIN TYPE STRING,
MEBPR TYPE STRING,
ERNAM TYPE STRING,
ERDAT TYPE STRING,
AENAM TYPE STRING,
AEDAT TYPE STRING,
LIGEN TYPE STRING,
AUGEN TYPE STRING,
VKGEN TYPE STRING,
EKGEN TYPE STRING,
BEGEB TYPE STRING,
BEGEV TYPE STRING,
BEDEB TYPE STRING,
BEDEV TYPE STRING,
RELIF TYPE STRING,
ADGEN TYPE STRING,
WMNGE TYPE STRING,
AUFME TYPE STRING,
PABBM TYPE STRING,
MIAMG TYPE STRING,
EKPNN TYPE STRING,
VKPNN TYPE STRING,
ECKPKZ TYPE STRING,
PAUFME TYPE STRING,
ALIVO TYPE STRING,
ALIBI TYPE STRING,
EPRGR TYPE STRING,
NVKP TYPE STRING,
SPGRU TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WAKL3_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_WAKL3_STR-NAME1 sy-vline 
WA_WAKL3_STR-CLASS sy-vline 
WA_WAKL3_STR-MAKTX sy-vline 
WA_WAKL3_STR-KLART sy-vline 
WA_WAKL3_STR-MANDT sy-vline 
WA_WAKL3_STR-AKTNR sy-vline 
WA_WAKL3_STR-ARTNR sy-vline 
WA_WAKL3_STR-MEBME sy-vline 
WA_WAKL3_STR-KUNNR sy-vline 
WA_WAKL3_STR-CLINT sy-vline 
WA_WAKL3_STR-WALNR sy-vline 
WA_WAKL3_STR-AKTHE sy-vline 
WA_WAKL3_STR-ERLIS sy-vline 
WA_WAKL3_STR-GENLI sy-vline 
WA_WAKL3_STR-VKORG sy-vline 
WA_WAKL3_STR-VTWEG sy-vline 
WA_WAKL3_STR-SPART sy-vline 
WA_WAKL3_STR-EKORG sy-vline 
WA_WAKL3_STR-EKGRP sy-vline 
WA_WAKL3_STR-LIFNR sy-vline 
WA_WAKL3_STR-LIFTY sy-vline 
WA_WAKL3_STR-VZWRK sy-vline 
WA_WAKL3_STR-INFWK sy-vline 
WA_WAKL3_STR-VZEKO sy-vline 
WA_WAKL3_STR-VZVKO sy-vline 
WA_WAKL3_STR-VZVTW sy-vline 
WA_WAKL3_STR-VZSPA sy-vline 
WA_WAKL3_STR-EXTLI sy-vline 
WA_WAKL3_STR-BZQFI sy-vline 
WA_WAKL3_STR-BEKTB sy-vline 
WA_WAKL3_STR-BEKTV sy-vline 
WA_WAKL3_STR-ABDTB sy-vline 
WA_WAKL3_STR-RUDAB sy-vline 
WA_WAKL3_STR-RUDAV sy-vline 
WA_WAKL3_STR-RUSTB sy-vline 
WA_WAKL3_STR-RUSTV sy-vline 
WA_WAKL3_STR-BESTB sy-vline 
WA_WAKL3_STR-BESTV sy-vline 
WA_WAKL3_STR-AENDB sy-vline 
WA_WAKL3_STR-AENDV sy-vline 
WA_WAKL3_STR-PLEKP sy-vline 
WA_WAKL3_STR-WAEEK sy-vline 
WA_WAKL3_STR-PLVKP sy-vline 
WA_WAKL3_STR-WAELA sy-vline 
WA_WAKL3_STR-EKDAB sy-vline 
WA_WAKL3_STR-EKDBI sy-vline 
WA_WAKL3_STR-VKDAB sy-vline 
WA_WAKL3_STR-VKDBI sy-vline 
WA_WAKL3_STR-SPANE sy-vline 
WA_WAKL3_STR-SPABR sy-vline 
WA_WAKL3_STR-AUFSG sy-vline 
WA_WAKL3_STR-VSPAN sy-vline 
WA_WAKL3_STR-VSPAB sy-vline 
WA_WAKL3_STR-VAUFS sy-vline 
WA_WAKL3_STR-VABGM sy-vline 
WA_WAKL3_STR-VABGP sy-vline 
WA_WAKL3_STR-PARKZ sy-vline 
WA_WAKL3_STR-EPEIN sy-vline 
WA_WAKL3_STR-VZEPE sy-vline 
WA_WAKL3_STR-VPEIN sy-vline 
WA_WAKL3_STR-MEBPR sy-vline 
WA_WAKL3_STR-ERNAM sy-vline 
WA_WAKL3_STR-ERDAT sy-vline 
WA_WAKL3_STR-AENAM sy-vline 
WA_WAKL3_STR-AEDAT sy-vline 
WA_WAKL3_STR-LIGEN sy-vline 
WA_WAKL3_STR-AUGEN sy-vline 
WA_WAKL3_STR-VKGEN sy-vline 
WA_WAKL3_STR-EKGEN sy-vline 
WA_WAKL3_STR-BEGEB sy-vline 
WA_WAKL3_STR-BEGEV sy-vline 
WA_WAKL3_STR-BEDEB sy-vline 
WA_WAKL3_STR-BEDEV sy-vline 
WA_WAKL3_STR-RELIF sy-vline 
WA_WAKL3_STR-ADGEN sy-vline 
WA_WAKL3_STR-WMNGE sy-vline 
WA_WAKL3_STR-AUFME sy-vline 
WA_WAKL3_STR-PABBM sy-vline 
WA_WAKL3_STR-MIAMG sy-vline 
WA_WAKL3_STR-EKPNN sy-vline 
WA_WAKL3_STR-VKPNN sy-vline 
WA_WAKL3_STR-ECKPKZ sy-vline 
WA_WAKL3_STR-PAUFME sy-vline 
WA_WAKL3_STR-ALIVO sy-vline 
WA_WAKL3_STR-ALIBI sy-vline 
WA_WAKL3_STR-EPRGR sy-vline 
WA_WAKL3_STR-NVKP sy-vline 
WA_WAKL3_STR-SPGRU sy-vline      INTO ld_text SEPARATED BY SPACE.

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