ABAP Select data from SAP table PXVAF into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PXVAF
*  INTO TABLE @DATA(IT_PXVAF2).
*--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_PXVAF INDEX 1 INTO DATA(WA_PXVAF2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PXVAF>-URZEI = 1.
<PXVAF>-ZEILE = 1.
<PXVAF>-MATNR = 1.
<PXVAF>-WERKS = 1.
<PXVAF>-XSTRU = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PXVAF-XHEAD, sy-vline,
  WA_PXVAF-ATTYP, sy-vline,
  WA_PXVAF-XWROB, sy-vline,
  WA_PXVAF-SHKZG, sy-vline,
  WA_PXVAF-KZUML, sy-vline,
  WA_PXVAF-XVKBW, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PXVAF 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_PXVAF 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_PXVAF INTO WA_PXVAF.


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

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

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

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

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

*Conversion exit MATN1, internal->external for field UMMAB
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_PXVAF-UMMAB
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PXVAF-UMMAB.
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_PXVAF_STR, 
URZEI TYPE STRING,
ZEILE TYPE STRING,
MATNR TYPE STRING,
WERKS TYPE STRING,
XSTRU TYPE STRING,
XHEAD TYPE STRING,
ATTYP TYPE STRING,
XWROB TYPE STRING,
SHKZG TYPE STRING,
KZUML TYPE STRING,
XVKBW TYPE STRING,
BUDAT TYPE STRING,
MENGE TYPE STRING,
MEINS TYPE STRING,
ERFMG TYPE STRING,
ERFME TYPE STRING,
WRBTR TYPE STRING,
EXWRT TYPE STRING,
UMVKW TYPE STRING,
UMVKA TYPE STRING,
VKWRT TYPE STRING,
VKWRA TYPE STRING,
EXVKW TYPE STRING,
WAERS TYPE STRING,
BUKRS TYPE STRING,
BWKEY TYPE STRING,
BWTAR TYPE STRING,
LGORT TYPE STRING,
VKSAL TYPE STRING,
VKLAB TYPE STRING,
LBKUM TYPE STRING,
UMMAT TYPE STRING,
UMWRK TYPE STRING,
UMBAR TYPE STRING,
UMBWK TYPE STRING,
UMXVK TYPE STRING,
UMWAE TYPE STRING,
UMLGO TYPE STRING,
UMBUK TYPE STRING,
UMLBK TYPE STRING,
MATBF TYPE STRING,
UMMAB TYPE STRING,
UMREZ TYPE STRING,
UMREN TYPE STRING,
XNSVR TYPE STRING,
ERGZE TYPE STRING,
XSTBW TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PXVAF_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_PXVAF_STR-URZEI sy-vline 
WA_PXVAF_STR-ZEILE sy-vline 
WA_PXVAF_STR-MATNR sy-vline 
WA_PXVAF_STR-WERKS sy-vline 
WA_PXVAF_STR-XSTRU sy-vline 
WA_PXVAF_STR-XHEAD sy-vline 
WA_PXVAF_STR-ATTYP sy-vline 
WA_PXVAF_STR-XWROB sy-vline 
WA_PXVAF_STR-SHKZG sy-vline 
WA_PXVAF_STR-KZUML sy-vline 
WA_PXVAF_STR-XVKBW sy-vline 
WA_PXVAF_STR-BUDAT sy-vline 
WA_PXVAF_STR-MENGE sy-vline 
WA_PXVAF_STR-MEINS sy-vline 
WA_PXVAF_STR-ERFMG sy-vline 
WA_PXVAF_STR-ERFME sy-vline 
WA_PXVAF_STR-WRBTR sy-vline 
WA_PXVAF_STR-EXWRT sy-vline 
WA_PXVAF_STR-UMVKW sy-vline 
WA_PXVAF_STR-UMVKA sy-vline 
WA_PXVAF_STR-VKWRT sy-vline 
WA_PXVAF_STR-VKWRA sy-vline 
WA_PXVAF_STR-EXVKW sy-vline 
WA_PXVAF_STR-WAERS sy-vline 
WA_PXVAF_STR-BUKRS sy-vline 
WA_PXVAF_STR-BWKEY sy-vline 
WA_PXVAF_STR-BWTAR sy-vline 
WA_PXVAF_STR-LGORT sy-vline 
WA_PXVAF_STR-VKSAL sy-vline 
WA_PXVAF_STR-VKLAB sy-vline 
WA_PXVAF_STR-LBKUM sy-vline 
WA_PXVAF_STR-UMMAT sy-vline 
WA_PXVAF_STR-UMWRK sy-vline 
WA_PXVAF_STR-UMBAR sy-vline 
WA_PXVAF_STR-UMBWK sy-vline 
WA_PXVAF_STR-UMXVK sy-vline 
WA_PXVAF_STR-UMWAE sy-vline 
WA_PXVAF_STR-UMLGO sy-vline 
WA_PXVAF_STR-UMBUK sy-vline 
WA_PXVAF_STR-UMLBK sy-vline 
WA_PXVAF_STR-MATBF sy-vline 
WA_PXVAF_STR-UMMAB sy-vline 
WA_PXVAF_STR-UMREZ sy-vline 
WA_PXVAF_STR-UMREN sy-vline 
WA_PXVAF_STR-XNSVR sy-vline 
WA_PXVAF_STR-ERGZE sy-vline 
WA_PXVAF_STR-XSTBW sy-vline      INTO ld_text SEPARATED BY SPACE.

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