ABAP Select data from SAP table VKAEN_EXP into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM VKAEN_EXP
*  INTO TABLE @DATA(IT_VKAEN_EXP2).
*--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_VKAEN_EXP INDEX 1 INTO DATA(WA_VKAEN_EXP2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<VKAEN_EXP>-BUKRS = 1.
<VKAEN_EXP>-WERKS = 1.
<VKAEN_EXP>-LGORT = 1.
<VKAEN_EXP>-BWKEY = 1.
<VKAEN_EXP>-BWTAR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_VKAEN_EXP-MATNR, sy-vline,
  WA_VKAEN_EXP-BUDAT, sy-vline,
  WA_VKAEN_EXP-BELNR, sy-vline,
  WA_VKAEN_EXP-VKSAL_OLD, sy-vline,
  WA_VKAEN_EXP-VKSALN_OLD, sy-vline,
  WA_VKAEN_EXP-VKLABN, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_VKAEN_EXP 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_VKAEN_EXP 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_VKAEN_EXP INTO WA_VKAEN_EXP.


*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_VKAEN_EXP-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VKAEN_EXP-MATNR.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

*Conversion exit GJAHR, internal->external for field KJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_VKAEN_EXP-KJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VKAEN_EXP-KJAHR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PROF_COST_VAL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VKAEN_EXP-PROF_COST_VAL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VKAEN_EXP-PROF_COST_VAL.
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_VKAEN_EXP_STR, 
BUKRS TYPE STRING,
WERKS TYPE STRING,
LGORT TYPE STRING,
BWKEY TYPE STRING,
BWTAR TYPE STRING,
MATNR TYPE STRING,
BUDAT TYPE STRING,
BELNR TYPE STRING,
VKSAL_OLD TYPE STRING,
VKSALN_OLD TYPE STRING,
VKLABN TYPE STRING,
VKSALN TYPE STRING,
VKSALNN TYPE STRING,
HWAER TYPE STRING,
MENGE TYPE STRING,
LBKUM TYPE STRING,
MEINS TYPE STRING,
PV_GRUND TYPE STRING,
SPANN TYPE STRING,
EKPA TYPE STRING,
EKPN TYPE STRING,
PEINH TYPE STRING,
SALK3 TYPE STRING,
WRBTR TYPE STRING,
SELKZ_SOLL TYPE STRING,
SELKZ_HABE TYPE STRING,
SHKZG TYPE STRING,
WAART TYPE STRING,
ATTYP TYPE STRING,
VPRSV TYPE STRING,
KALN1 TYPE STRING,
PRBLNR TYPE STRING,
KJAHR TYPE STRING,
VKLAB_OLD TYPE STRING,
MLMAA TYPE STRING,
PROF_COST_VAL TYPE STRING,
PR_ORIG_VPNEU TYPE STRING,
PR_ORIG_VPALT TYPE STRING,
PR_ORIG_DET_NEW TYPE STRING,
PR_ORIG_DET_OLD TYPE STRING,
UAKT TYPE STRING,
SALES_VAL_SIGN TYPE STRING,
AFFECT_COST_VAL TYPE STRING,
XZERO_COUNT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_VKAEN_EXP_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_VKAEN_EXP_STR-BUKRS sy-vline 
WA_VKAEN_EXP_STR-WERKS sy-vline 
WA_VKAEN_EXP_STR-LGORT sy-vline 
WA_VKAEN_EXP_STR-BWKEY sy-vline 
WA_VKAEN_EXP_STR-BWTAR sy-vline 
WA_VKAEN_EXP_STR-MATNR sy-vline 
WA_VKAEN_EXP_STR-BUDAT sy-vline 
WA_VKAEN_EXP_STR-BELNR sy-vline 
WA_VKAEN_EXP_STR-VKSAL_OLD sy-vline 
WA_VKAEN_EXP_STR-VKSALN_OLD sy-vline 
WA_VKAEN_EXP_STR-VKLABN sy-vline 
WA_VKAEN_EXP_STR-VKSALN sy-vline 
WA_VKAEN_EXP_STR-VKSALNN sy-vline 
WA_VKAEN_EXP_STR-HWAER sy-vline 
WA_VKAEN_EXP_STR-MENGE sy-vline 
WA_VKAEN_EXP_STR-LBKUM sy-vline 
WA_VKAEN_EXP_STR-MEINS sy-vline 
WA_VKAEN_EXP_STR-PV_GRUND sy-vline 
WA_VKAEN_EXP_STR-SPANN sy-vline 
WA_VKAEN_EXP_STR-EKPA sy-vline 
WA_VKAEN_EXP_STR-EKPN sy-vline 
WA_VKAEN_EXP_STR-PEINH sy-vline 
WA_VKAEN_EXP_STR-SALK3 sy-vline 
WA_VKAEN_EXP_STR-WRBTR sy-vline 
WA_VKAEN_EXP_STR-SELKZ_SOLL sy-vline 
WA_VKAEN_EXP_STR-SELKZ_HABE sy-vline 
WA_VKAEN_EXP_STR-SHKZG sy-vline 
WA_VKAEN_EXP_STR-WAART sy-vline 
WA_VKAEN_EXP_STR-ATTYP sy-vline 
WA_VKAEN_EXP_STR-VPRSV sy-vline 
WA_VKAEN_EXP_STR-KALN1 sy-vline 
WA_VKAEN_EXP_STR-PRBLNR sy-vline 
WA_VKAEN_EXP_STR-KJAHR sy-vline 
WA_VKAEN_EXP_STR-VKLAB_OLD sy-vline 
WA_VKAEN_EXP_STR-MLMAA sy-vline 
WA_VKAEN_EXP_STR-PROF_COST_VAL sy-vline 
WA_VKAEN_EXP_STR-PR_ORIG_VPNEU sy-vline 
WA_VKAEN_EXP_STR-PR_ORIG_VPALT sy-vline 
WA_VKAEN_EXP_STR-PR_ORIG_DET_NEW sy-vline 
WA_VKAEN_EXP_STR-PR_ORIG_DET_OLD sy-vline 
WA_VKAEN_EXP_STR-UAKT sy-vline 
WA_VKAEN_EXP_STR-SALES_VAL_SIGN sy-vline 
WA_VKAEN_EXP_STR-AFFECT_COST_VAL sy-vline 
WA_VKAEN_EXP_STR-XZERO_COUNT sy-vline      INTO ld_text SEPARATED BY SPACE.

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