ABAP Select data from SAP table VNEHC into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP VNEHC 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 VNEHC. 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 VNEHC 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_VNEHC TYPE STANDARD TABLE OF VNEHC,
      WA_VNEHC TYPE VNEHC,
      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: <VNEHC> TYPE VNEHC.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM VNEHC
*  INTO TABLE @DATA(IT_VNEHC2).
*--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_VNEHC INDEX 1 INTO DATA(WA_VNEHC2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<VNEHC>-MANDT = 1.
<VNEHC>-LNCRD = 1.
<VNEHC>-CRDTYPE = 1.
<VNEHC>-EXT_KEY1 = 1.
<VNEHC>-EXT_KEY2 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_VNEHC-PATNR, sy-vline,
  WA_VNEHC-ERUSR, sy-vline,
  WA_VNEHC-ERDAT, sy-vline,
  WA_VNEHC-ERTIM, sy-vline,
  WA_VNEHC-UPUSR, sy-vline,
  WA_VNEHC-UPDAT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_VNEHC 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_VNEHC 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_VNEHC INTO WA_VNEHC.


*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 PATNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VNEHC-PATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VNEHC-PATNR.
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_VNEHC_STR, 
MANDT TYPE STRING,
LNCRD TYPE STRING,
CRDTYPE TYPE STRING,
EXT_KEY1 TYPE STRING,
EXT_KEY2 TYPE STRING,
PATNR TYPE STRING,
ERUSR TYPE STRING,
ERDAT TYPE STRING,
ERTIM TYPE STRING,
UPUSR TYPE STRING,
UPDAT TYPE STRING,
UPTIM TYPE STRING,
STORN TYPE STRING,
DOCTYPE TYPE STRING,
MANUAL TYPE STRING,
READ_DATE TYPE STRING,
ONLINQOK TYPE STRING,
BEGDT TYPE STRING,
ENDDT TYPE STRING,
CARDVALID TYPE STRING,
CVUSR TYPE STRING,
CVDAT TYPE STRING,
CVTIM TYPE STRING,
EF_VERSION TYPE STRING,
CDATA TYPE STRING,
KZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_VNEHC_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_VNEHC_STR-MANDT sy-vline 
WA_VNEHC_STR-LNCRD sy-vline 
WA_VNEHC_STR-CRDTYPE sy-vline 
WA_VNEHC_STR-EXT_KEY1 sy-vline 
WA_VNEHC_STR-EXT_KEY2 sy-vline 
WA_VNEHC_STR-PATNR sy-vline 
WA_VNEHC_STR-ERUSR sy-vline 
WA_VNEHC_STR-ERDAT sy-vline 
WA_VNEHC_STR-ERTIM sy-vline 
WA_VNEHC_STR-UPUSR sy-vline 
WA_VNEHC_STR-UPDAT sy-vline 
WA_VNEHC_STR-UPTIM sy-vline 
WA_VNEHC_STR-STORN sy-vline 
WA_VNEHC_STR-DOCTYPE sy-vline 
WA_VNEHC_STR-MANUAL sy-vline 
WA_VNEHC_STR-READ_DATE sy-vline 
WA_VNEHC_STR-ONLINQOK sy-vline 
WA_VNEHC_STR-BEGDT sy-vline 
WA_VNEHC_STR-ENDDT sy-vline 
WA_VNEHC_STR-CARDVALID sy-vline 
WA_VNEHC_STR-CVUSR sy-vline 
WA_VNEHC_STR-CVDAT sy-vline 
WA_VNEHC_STR-CVTIM sy-vline 
WA_VNEHC_STR-EF_VERSION sy-vline 
WA_VNEHC_STR-CDATA sy-vline 
WA_VNEHC_STR-KZ sy-vline      INTO ld_text SEPARATED BY SPACE.

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