ABAP Select data from SAP table V_USEG into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM V_USEG
*  INTO TABLE @DATA(IT_V_USEG2).
*--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_V_USEG INDEX 1 INTO DATA(WA_V_USEG2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<V_USEG>-MANDT = 1.
<V_USEG>-UBLNR = 1.
<V_USEG>-UBJAHR = 1.
<V_USEG>-UZEIL = 1.
<V_USEG>-UPSTA = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_V_USEG-BUKRS, sy-vline,
  WA_V_USEG-BWKEY, sy-vline,
  WA_V_USEG-WERKS, sy-vline,
  WA_V_USEG-LGORT, sy-vline,
  WA_V_USEG-BWTAR, sy-vline,
  WA_V_USEG-MATNR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_V_USEG 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_V_USEG 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_V_USEG INTO WA_V_USEG.


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

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

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

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

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

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

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

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

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

*Conversion exit ALPHA, internal->external for field MBLNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_V_USEG-MBLNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_USEG-MBLNR.
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_V_USEG_STR, 
MANDT TYPE STRING,
UBLNR TYPE STRING,
UBJAHR TYPE STRING,
UZEIL TYPE STRING,
UPSTA TYPE STRING,
BUKRS TYPE STRING,
BWKEY TYPE STRING,
WERKS TYPE STRING,
LGORT TYPE STRING,
BWTAR TYPE STRING,
MATNR TYPE STRING,
MATBF TYPE STRING,
PV_GRUND TYPE STRING,
BUDAT TYPE STRING,
VPDAT TYPE STRING,
ENDPR TYPE STRING,
VPNEU TYPE STRING,
VPALT TYPE STRING,
VWAER TYPE STRING,
VRKPE TYPE STRING,
VRKME TYPE STRING,
AKTNR TYPE STRING,
VKLAB_OLD TYPE STRING,
VKLABN_OLD TYPE STRING,
VKSAL_OLD TYPE STRING,
VKSALN_OLD TYPE STRING,
VKSAD TYPE STRING,
VKSADN TYPE STRING,
HWAER TYPE STRING,
ERFMG TYPE STRING,
MENGE TYPE STRING,
LBKUM TYPE STRING,
MEINS TYPE STRING,
UMVKZ TYPE STRING,
UMVKN TYPE STRING,
SPANN TYPE STRING,
EKPA TYPE STRING,
EKPN TYPE STRING,
SALK3_OLD TYPE STRING,
WRBTR TYPE STRING,
SHKZG TYPE STRING,
XIVNE TYPE STRING,
ERDAT TYPE STRING,
ERNAM TYPE STRING,
AEDAT TYPE STRING,
AENAM TYPE STRING,
UBSTA TYPE STRING,
BELNR TYPE STRING,
MBLNR TYPE STRING,
UAKT TYPE STRING,
SALES_VAL_SIGN TYPE STRING,
AFFECT_COST_VAL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_V_USEG_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_V_USEG_STR-MANDT sy-vline 
WA_V_USEG_STR-UBLNR sy-vline 
WA_V_USEG_STR-UBJAHR sy-vline 
WA_V_USEG_STR-UZEIL sy-vline 
WA_V_USEG_STR-UPSTA sy-vline 
WA_V_USEG_STR-BUKRS sy-vline 
WA_V_USEG_STR-BWKEY sy-vline 
WA_V_USEG_STR-WERKS sy-vline 
WA_V_USEG_STR-LGORT sy-vline 
WA_V_USEG_STR-BWTAR sy-vline 
WA_V_USEG_STR-MATNR sy-vline 
WA_V_USEG_STR-MATBF sy-vline 
WA_V_USEG_STR-PV_GRUND sy-vline 
WA_V_USEG_STR-BUDAT sy-vline 
WA_V_USEG_STR-VPDAT sy-vline 
WA_V_USEG_STR-ENDPR sy-vline 
WA_V_USEG_STR-VPNEU sy-vline 
WA_V_USEG_STR-VPALT sy-vline 
WA_V_USEG_STR-VWAER sy-vline 
WA_V_USEG_STR-VRKPE sy-vline 
WA_V_USEG_STR-VRKME sy-vline 
WA_V_USEG_STR-AKTNR sy-vline 
WA_V_USEG_STR-VKLAB_OLD sy-vline 
WA_V_USEG_STR-VKLABN_OLD sy-vline 
WA_V_USEG_STR-VKSAL_OLD sy-vline 
WA_V_USEG_STR-VKSALN_OLD sy-vline 
WA_V_USEG_STR-VKSAD sy-vline 
WA_V_USEG_STR-VKSADN sy-vline 
WA_V_USEG_STR-HWAER sy-vline 
WA_V_USEG_STR-ERFMG sy-vline 
WA_V_USEG_STR-MENGE sy-vline 
WA_V_USEG_STR-LBKUM sy-vline 
WA_V_USEG_STR-MEINS sy-vline 
WA_V_USEG_STR-UMVKZ sy-vline 
WA_V_USEG_STR-UMVKN sy-vline 
WA_V_USEG_STR-SPANN sy-vline 
WA_V_USEG_STR-EKPA sy-vline 
WA_V_USEG_STR-EKPN sy-vline 
WA_V_USEG_STR-SALK3_OLD sy-vline 
WA_V_USEG_STR-WRBTR sy-vline 
WA_V_USEG_STR-SHKZG sy-vline 
WA_V_USEG_STR-XIVNE sy-vline 
WA_V_USEG_STR-ERDAT sy-vline 
WA_V_USEG_STR-ERNAM sy-vline 
WA_V_USEG_STR-AEDAT sy-vline 
WA_V_USEG_STR-AENAM sy-vline 
WA_V_USEG_STR-UBSTA sy-vline 
WA_V_USEG_STR-BELNR sy-vline 
WA_V_USEG_STR-MBLNR sy-vline 
WA_V_USEG_STR-UAKT sy-vline 
WA_V_USEG_STR-SALES_VAL_SIGN sy-vline 
WA_V_USEG_STR-AFFECT_COST_VAL sy-vline      INTO ld_text SEPARATED BY SPACE.

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