ABAP Select data from SAP table VEASTS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM VEASTS
*  INTO TABLE @DATA(IT_VEASTS2).
*--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_VEASTS INDEX 1 INTO DATA(WA_VEASTS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<VEASTS>-MANDT = 1.
<VEASTS>-ANLAGE = 1.
<VEASTS>-LOGIKZW = 1.
<VEASTS>-BIS = 1.
<VEASTS>-AB = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_VEASTS-ZWNABR, sy-vline,
  WA_VEASTS-GVERRECH, sy-vline,
  WA_VEASTS-TARIFART, sy-vline,
  WA_VEASTS-KONDIGR, sy-vline,
  WA_VEASTS-RABZUS, sy-vline,
  WA_VEASTS-PREISKLA, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_VEASTS 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_VEASTS 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_VEASTS INTO WA_VEASTS.


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

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

*Conversion exit ALPHA, internal->external for field PREISKLA
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VEASTS-PREISKLA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VEASTS-PREISKLA.
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_VEASTS_STR, 
MANDT TYPE STRING,
ANLAGE TYPE STRING,
LOGIKZW TYPE STRING,
BIS TYPE STRING,
AB TYPE STRING,
ZWNABR TYPE STRING,
GVERRECH TYPE STRING,
TARIFART TYPE STRING,
KONDIGR TYPE STRING,
RABZUS TYPE STRING,
PREISKLA TYPE STRING,
ERDAT TYPE STRING,
ERNAM TYPE STRING,
AEDAT TYPE STRING,
AENAM TYPE STRING,
ZWNSETTL TYPE STRING,
KZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_VEASTS_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_VEASTS_STR-MANDT sy-vline 
WA_VEASTS_STR-ANLAGE sy-vline 
WA_VEASTS_STR-LOGIKZW sy-vline 
WA_VEASTS_STR-BIS sy-vline 
WA_VEASTS_STR-AB sy-vline 
WA_VEASTS_STR-ZWNABR sy-vline 
WA_VEASTS_STR-GVERRECH sy-vline 
WA_VEASTS_STR-TARIFART sy-vline 
WA_VEASTS_STR-KONDIGR sy-vline 
WA_VEASTS_STR-RABZUS sy-vline 
WA_VEASTS_STR-PREISKLA sy-vline 
WA_VEASTS_STR-ERDAT sy-vline 
WA_VEASTS_STR-ERNAM sy-vline 
WA_VEASTS_STR-AEDAT sy-vline 
WA_VEASTS_STR-AENAM sy-vline 
WA_VEASTS_STR-ZWNSETTL sy-vline 
WA_VEASTS_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.