ABAP Select data from SAP table VKKK_EPOSTEN into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM VKKK_EPOSTEN
*  INTO TABLE @DATA(IT_VKKK_EPOSTEN2).
*--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_VKKK_EPOSTEN INDEX 1 INTO DATA(WA_VKKK_EPOSTEN2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<VKKK_EPOSTEN>-RBART = 1.
<VKKK_EPOSTEN>-RBZNR = 1.
<VKKK_EPOSTEN>-VKONT = 1.
<VKKK_EPOSTEN>-GPART = 1.
<VKKK_EPOSTEN>-BUKRS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_VKKK_EPOSTEN-ANDPA, sy-vline,
  WA_VKKK_EPOSTEN-RATPL, sy-vline,
  WA_VKKK_EPOSTEN-PRATP, sy-vline,
  WA_VKKK_EPOSTEN-PSAMM, sy-vline,
  WA_VKKK_EPOSTEN-SAMMR, sy-vline,
  WA_VKKK_EPOSTEN-VARNR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_VKKK_EPOSTEN 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_VKKK_EPOSTEN 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_VKKK_EPOSTEN INTO WA_VKKK_EPOSTEN.


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

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

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

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

*Conversion exit ALPHA, internal->external for field INSOBJECT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VKKK_EPOSTEN-INSOBJECT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VKKK_EPOSTEN-INSOBJECT.
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_VKKK_EPOSTEN_STR, 
RBART TYPE STRING,
RBZNR TYPE STRING,
VKONT TYPE STRING,
GPART TYPE STRING,
BUKRS TYPE STRING,
ANDPA TYPE STRING,
RATPL TYPE STRING,
PRATP TYPE STRING,
PSAMM TYPE STRING,
SAMMR TYPE STRING,
VARNR TYPE STRING,
XZAHL TYPE STRING,
XAWAP TYPE STRING,
XAWOP TYPE STRING,
PGMID TYPE STRING,
STAKZ TYPE STRING,
STAKA TYPE STRING,
STAKB TYPE STRING,
STAKG TYPE STRING,
STAKP TYPE STRING,
STAKR TYPE STRING,
STAKS TYPE STRING,
STAKZ_Z TYPE STRING,
SZAHL TYPE STRING,
XSUMM TYPE STRING,
SRVAR TYPE STRING,
INSOBJECT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_VKKK_EPOSTEN_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_VKKK_EPOSTEN_STR-RBART sy-vline 
WA_VKKK_EPOSTEN_STR-RBZNR sy-vline 
WA_VKKK_EPOSTEN_STR-VKONT sy-vline 
WA_VKKK_EPOSTEN_STR-GPART sy-vline 
WA_VKKK_EPOSTEN_STR-BUKRS sy-vline 
WA_VKKK_EPOSTEN_STR-ANDPA sy-vline 
WA_VKKK_EPOSTEN_STR-RATPL sy-vline 
WA_VKKK_EPOSTEN_STR-PRATP sy-vline 
WA_VKKK_EPOSTEN_STR-PSAMM sy-vline 
WA_VKKK_EPOSTEN_STR-SAMMR sy-vline 
WA_VKKK_EPOSTEN_STR-VARNR sy-vline 
WA_VKKK_EPOSTEN_STR-XZAHL sy-vline 
WA_VKKK_EPOSTEN_STR-XAWAP sy-vline 
WA_VKKK_EPOSTEN_STR-XAWOP sy-vline 
WA_VKKK_EPOSTEN_STR-PGMID sy-vline 
WA_VKKK_EPOSTEN_STR-STAKZ sy-vline 
WA_VKKK_EPOSTEN_STR-STAKA sy-vline 
WA_VKKK_EPOSTEN_STR-STAKB sy-vline 
WA_VKKK_EPOSTEN_STR-STAKG sy-vline 
WA_VKKK_EPOSTEN_STR-STAKP sy-vline 
WA_VKKK_EPOSTEN_STR-STAKR sy-vline 
WA_VKKK_EPOSTEN_STR-STAKS sy-vline 
WA_VKKK_EPOSTEN_STR-STAKZ_Z sy-vline 
WA_VKKK_EPOSTEN_STR-SZAHL sy-vline 
WA_VKKK_EPOSTEN_STR-XSUMM sy-vline 
WA_VKKK_EPOSTEN_STR-SRVAR sy-vline 
WA_VKKK_EPOSTEN_STR-INSOBJECT sy-vline      INTO ld_text SEPARATED BY SPACE.

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