ABAP Select data from SAP table P01VA_KA into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP P01VA_KA 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 P01VA_KA. 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 P01VA_KA 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_P01VA_KA TYPE STANDARD TABLE OF P01VA_KA,
      WA_P01VA_KA TYPE P01VA_KA,
      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: <P01VA_KA> TYPE P01VA_KA.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_P01VA_KA.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM P01VA_KA
  INTO TABLE IT_P01VA_KA.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM P01VA_KA
*  INTO TABLE @DATA(IT_P01VA_KA2).
*--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_P01VA_KA INDEX 1 INTO DATA(WA_P01VA_KA2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_P01VA_KA ASSIGNING <P01VA_KA>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<P01VA_KA>-MANDT = 1.
<P01VA_KA>-PERNR = 1.
<P01VA_KA>-ANFDT = 1.
<P01VA_KA>-OBJPS = 1.
<P01VA_KA>-HANSP = 1.

ENDLOOP.

LOOP AT IT_P01VA_KA INTO WA_P01VA_KA.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_P01VA_KA-UAANW, sy-vline,
  WA_P01VA_KA-ENDDA, sy-vline,
  WA_P01VA_KA-BEGDA, sy-vline,
  WA_P01VA_KA-LGART, sy-vline,
  WA_P01VA_KA-ANWRT, sy-vline,
  WA_P01VA_KA-DKKAP, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_P01VA_KA 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_P01VA_KA 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_P01VA_KA INTO WA_P01VA_KA.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_P01VA_KA_STR, 
MANDT TYPE STRING,
PERNR TYPE STRING,
ANFDT TYPE STRING,
OBJPS TYPE STRING,
HANSP TYPE STRING,
UAANW TYPE STRING,
ENDDA TYPE STRING,
BEGDA TYPE STRING,
LGART TYPE STRING,
ANWRT TYPE STRING,
DKKAP TYPE STRING,
WAERS TYPE STRING,
EDDAT TYPE STRING,
GREKA TYPE STRING,
RELRE TYPE STRING,
RUECK TYPE STRING,
BTZNR TYPE STRING,
REKLA TYPE STRING,
RESVF TYPE STRING,END OF T_EKKO_STR.
DATA: WA_P01VA_KA_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_P01VA_KA_STR-MANDT sy-vline 
WA_P01VA_KA_STR-PERNR sy-vline 
WA_P01VA_KA_STR-ANFDT sy-vline 
WA_P01VA_KA_STR-OBJPS sy-vline 
WA_P01VA_KA_STR-HANSP sy-vline 
WA_P01VA_KA_STR-UAANW sy-vline 
WA_P01VA_KA_STR-ENDDA sy-vline 
WA_P01VA_KA_STR-BEGDA sy-vline 
WA_P01VA_KA_STR-LGART sy-vline 
WA_P01VA_KA_STR-ANWRT sy-vline 
WA_P01VA_KA_STR-DKKAP sy-vline 
WA_P01VA_KA_STR-WAERS sy-vline 
WA_P01VA_KA_STR-EDDAT sy-vline 
WA_P01VA_KA_STR-GREKA sy-vline 
WA_P01VA_KA_STR-RELRE sy-vline 
WA_P01VA_KA_STR-RUECK sy-vline 
WA_P01VA_KA_STR-BTZNR sy-vline 
WA_P01VA_KA_STR-REKLA sy-vline 
WA_P01VA_KA_STR-RESVF sy-vline      INTO ld_text SEPARATED BY SPACE.

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