ABAP Select data from SAP table WZRE_AB_DOC_VIEW into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WZRE_AB_DOC_VIEW
*  INTO TABLE @DATA(IT_WZRE_AB_DOC_VIEW2).
*--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_WZRE_AB_DOC_VIEW INDEX 1 INTO DATA(WA_WZRE_AB_DOC_VIEW2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WZRE_AB_DOC_VIEW>-WBELN = 1.
<WZRE_AB_DOC_VIEW>-XBLNR = 1.
<WZRE_AB_DOC_VIEW>-ZUONR = 1.
<WZRE_AB_DOC_VIEW>-BEZEI_LIFRE = 1.
<WZRE_AB_DOC_VIEW>-BEZEI_LNRZB = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WZRE_AB_DOC_VIEW-NETWRD, sy-vline,
  WA_WZRE_AB_DOC_VIEW-BRTWRD, sy-vline,
  WA_WZRE_AB_DOC_VIEW-WAERL, sy-vline,
  WA_WZRE_AB_DOC_VIEW-ZBD1TD, sy-vline,
  WA_WZRE_AB_DOC_VIEW-ZBD1PD, sy-vline,
  WA_WZRE_AB_DOC_VIEW-ZBD2TD, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WZRE_AB_DOC_VIEW 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_WZRE_AB_DOC_VIEW 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_WZRE_AB_DOC_VIEW INTO WA_WZRE_AB_DOC_VIEW.


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

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

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

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

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

*Conversion exit ALPHA, internal->external for field KUNRG
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_WZRE_AB_DOC_VIEW-KUNRG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WZRE_AB_DOC_VIEW-KUNRG.
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_WZRE_AB_DOC_VIEW_STR, 
WBELN TYPE STRING,
XBLNR TYPE STRING,
ZUONR TYPE STRING,
BEZEI_LIFRE TYPE STRING,
BEZEI_LNRZB TYPE STRING,
NETWRD TYPE STRING,
BRTWRD TYPE STRING,
WAERL TYPE STRING,
ZBD1TD TYPE STRING,
ZBD1PD TYPE STRING,
ZBD2TD TYPE STRING,
ZBD2PD TYPE STRING,
ZBD3TD TYPE STRING,
RFBSK_TEXT TYPE STRING,
FKSTO TYPE STRING,
LFAKS TYPE STRING,
BEZEI_KUNRE TYPE STRING,
BEZEI_KUNRG TYPE STRING,
ERDAT TYPE STRING,
ERZET TYPE STRING,
ERNAM TYPE STRING,
AEDAT TYPE STRING,
WFDAT TYPE STRING,
BLDAT TYPE STRING,
ZTERMD TYPE STRING,
VALTGD TYPE STRING,
VALDTD TYPE STRING,
LIFRE TYPE STRING,
LNRZB TYPE STRING,
KUNRE TYPE STRING,
KUNRG TYPE STRING,
RFBSK TYPE STRING,
BACK_DAYS TYPE STRING,
MAX_HITS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WZRE_AB_DOC_VIEW_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_WZRE_AB_DOC_VIEW_STR-WBELN sy-vline 
WA_WZRE_AB_DOC_VIEW_STR-XBLNR sy-vline 
WA_WZRE_AB_DOC_VIEW_STR-ZUONR sy-vline 
WA_WZRE_AB_DOC_VIEW_STR-BEZEI_LIFRE sy-vline 
WA_WZRE_AB_DOC_VIEW_STR-BEZEI_LNRZB sy-vline 
WA_WZRE_AB_DOC_VIEW_STR-NETWRD sy-vline 
WA_WZRE_AB_DOC_VIEW_STR-BRTWRD sy-vline 
WA_WZRE_AB_DOC_VIEW_STR-WAERL sy-vline 
WA_WZRE_AB_DOC_VIEW_STR-ZBD1TD sy-vline 
WA_WZRE_AB_DOC_VIEW_STR-ZBD1PD sy-vline 
WA_WZRE_AB_DOC_VIEW_STR-ZBD2TD sy-vline 
WA_WZRE_AB_DOC_VIEW_STR-ZBD2PD sy-vline 
WA_WZRE_AB_DOC_VIEW_STR-ZBD3TD sy-vline 
WA_WZRE_AB_DOC_VIEW_STR-RFBSK_TEXT sy-vline 
WA_WZRE_AB_DOC_VIEW_STR-FKSTO sy-vline 
WA_WZRE_AB_DOC_VIEW_STR-LFAKS sy-vline 
WA_WZRE_AB_DOC_VIEW_STR-BEZEI_KUNRE sy-vline 
WA_WZRE_AB_DOC_VIEW_STR-BEZEI_KUNRG sy-vline 
WA_WZRE_AB_DOC_VIEW_STR-ERDAT sy-vline 
WA_WZRE_AB_DOC_VIEW_STR-ERZET sy-vline 
WA_WZRE_AB_DOC_VIEW_STR-ERNAM sy-vline 
WA_WZRE_AB_DOC_VIEW_STR-AEDAT sy-vline 
WA_WZRE_AB_DOC_VIEW_STR-WFDAT sy-vline 
WA_WZRE_AB_DOC_VIEW_STR-BLDAT sy-vline 
WA_WZRE_AB_DOC_VIEW_STR-ZTERMD sy-vline 
WA_WZRE_AB_DOC_VIEW_STR-VALTGD sy-vline 
WA_WZRE_AB_DOC_VIEW_STR-VALDTD sy-vline 
WA_WZRE_AB_DOC_VIEW_STR-LIFRE sy-vline 
WA_WZRE_AB_DOC_VIEW_STR-LNRZB sy-vline 
WA_WZRE_AB_DOC_VIEW_STR-KUNRE sy-vline 
WA_WZRE_AB_DOC_VIEW_STR-KUNRG sy-vline 
WA_WZRE_AB_DOC_VIEW_STR-RFBSK sy-vline 
WA_WZRE_AB_DOC_VIEW_STR-BACK_DAYS sy-vline 
WA_WZRE_AB_DOC_VIEW_STR-MAX_HITS sy-vline      INTO ld_text SEPARATED BY SPACE.

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