ABAP Select data from SAP table WR02D into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP WR02D 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 WR02D. 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 WR02D 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_WR02D TYPE STANDARD TABLE OF WR02D,
      WA_WR02D TYPE WR02D,
      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: <WR02D> TYPE WR02D.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_WR02D.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM WR02D
  INTO TABLE IT_WR02D.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WR02D
*  INTO TABLE @DATA(IT_WR02D2).
*--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_WR02D INDEX 1 INTO DATA(WA_WR02D2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_WR02D ASSIGNING <WR02D>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WR02D>-LOCNR = 1.
<WR02D>-BETRP = 1.
<WR02D>-REF_WKFIL = 1.
<WR02D>-REF_BUKRS = 1.
<WR02D>-REF_VKORG = 1.

ENDLOOP.

LOOP AT IT_WR02D INTO WA_WR02D.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WR02D-REF_VTWEG, sy-vline,
  WA_WR02D-REF_SPART, sy-vline,
  WA_WR02D-REF_BP, sy-vline,
  WA_WR02D-D0400, sy-vline,
  WA_WR02D-OK_CODE, sy-vline,
  WA_WR02D-SELKZ, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WR02D 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_WR02D 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_WR02D INTO WA_WR02D.


*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 REF_BP
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_WR02D-REF_BP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WR02D-REF_BP.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LIFNR_NEU
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_WR02D-LIFNR_NEU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WR02D-LIFNR_NEU.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KUNNR_NEU
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_WR02D-KUNNR_NEU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WR02D-KUNNR_NEU.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field SITE_BP
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_WR02D-SITE_BP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WR02D-SITE_BP.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KUNNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_WR02D-KUNNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WR02D-KUNNR.
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_WR02D_STR, 
LOCNR TYPE STRING,
BETRP TYPE STRING,
REF_WKFIL TYPE STRING,
REF_BUKRS TYPE STRING,
REF_VKORG TYPE STRING,
REF_VTWEG TYPE STRING,
REF_SPART TYPE STRING,
REF_BP TYPE STRING,
D0400 TYPE STRING,
OK_CODE TYPE STRING,
SELKZ TYPE STRING,
CHAR_LG_01 TYPE STRING,
PRIOT_TEXT TYPE STRING,
VLFKZ_TEXT TYPE STRING,
NLMATFB_TX TYPE STRING,
SEITE TYPE STRING,
DATAB TYPE STRING,
DATBI TYPE STRING,
REF_NAME1 TYPE STRING,
PUSH001 TYPE STRING,
PUSH002 TYPE STRING,
PUSH003 TYPE STRING,
LIFNR_NEU TYPE STRING,
KUNNR_NEU TYPE STRING,
WKFIL TYPE STRING,
KKOWK_TEXT TYPE STRING,
MATKL_LWRK TYPE STRING,
VLFKZ_LIST TYPE STRING,
LIGRD_TX TYPE STRING,
VTBFI_TEXT TYPE STRING,
SITE_BP TYPE STRING,
BP_GRP_SITE TYPE STRING,
BP_ROLEGROUPING TYPE STRING,
STORETYPE TYPE STRING,
DEP_STORE TYPE STRING,
CATEGORY TYPE STRING,
HIER_ID TYPE STRING,
KUNNR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WR02D_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_WR02D_STR-LOCNR sy-vline 
WA_WR02D_STR-BETRP sy-vline 
WA_WR02D_STR-REF_WKFIL sy-vline 
WA_WR02D_STR-REF_BUKRS sy-vline 
WA_WR02D_STR-REF_VKORG sy-vline 
WA_WR02D_STR-REF_VTWEG sy-vline 
WA_WR02D_STR-REF_SPART sy-vline 
WA_WR02D_STR-REF_BP sy-vline 
WA_WR02D_STR-D0400 sy-vline 
WA_WR02D_STR-OK_CODE sy-vline 
WA_WR02D_STR-SELKZ sy-vline 
WA_WR02D_STR-CHAR_LG_01 sy-vline 
WA_WR02D_STR-PRIOT_TEXT sy-vline 
WA_WR02D_STR-VLFKZ_TEXT sy-vline 
WA_WR02D_STR-NLMATFB_TX sy-vline 
WA_WR02D_STR-SEITE sy-vline 
WA_WR02D_STR-DATAB sy-vline 
WA_WR02D_STR-DATBI sy-vline 
WA_WR02D_STR-REF_NAME1 sy-vline 
WA_WR02D_STR-PUSH001 sy-vline 
WA_WR02D_STR-PUSH002 sy-vline 
WA_WR02D_STR-PUSH003 sy-vline 
WA_WR02D_STR-LIFNR_NEU sy-vline 
WA_WR02D_STR-KUNNR_NEU sy-vline 
WA_WR02D_STR-WKFIL sy-vline 
WA_WR02D_STR-KKOWK_TEXT sy-vline 
WA_WR02D_STR-MATKL_LWRK sy-vline 
WA_WR02D_STR-VLFKZ_LIST sy-vline 
WA_WR02D_STR-LIGRD_TX sy-vline 
WA_WR02D_STR-VTBFI_TEXT sy-vline 
WA_WR02D_STR-SITE_BP sy-vline 
WA_WR02D_STR-BP_GRP_SITE sy-vline 
WA_WR02D_STR-BP_ROLEGROUPING sy-vline 
WA_WR02D_STR-STORETYPE sy-vline 
WA_WR02D_STR-DEP_STORE sy-vline 
WA_WR02D_STR-CATEGORY sy-vline 
WA_WR02D_STR-HIER_ID sy-vline 
WA_WR02D_STR-KUNNR sy-vline      INTO ld_text SEPARATED BY SPACE.

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