ABAP Select data from SAP table VWSAMOUNT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM VWSAMOUNT
*  INTO TABLE @DATA(IT_VWSAMOUNT2).
*--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_VWSAMOUNT INDEX 1 INTO DATA(WA_VWSAMOUNT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<VWSAMOUNT>-WEBETR = 1.
<VWSAMOUNT>-BEBETR = 1.
<VWSAMOUNT>-WZBETR = 1.
<VWSAMOUNT>-BZBETR = 1.
<VWSAMOUNT>-BHWBETR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_VWSAMOUNT-WBBETR, sy-vline,
  WA_VWSAMOUNT-BBBETR, sy-vline,
  WA_VWSAMOUNT-WPRICE, sy-vline,
  WA_VWSAMOUNT-WSBETR, sy-vline,
  WA_VWSAMOUNT-KZWKURS, sy-vline,
  WA_VWSAMOUNT-KHWKURS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_VWSAMOUNT 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_VWSAMOUNT 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_VWSAMOUNT INTO WA_VWSAMOUNT.


*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 EXCRT, internal->external for field KZWKURS
CALL FUNCTION 'CONVERSION_EXIT_EXCRT_OUTPUT'
  EXPORTING
    input =                      WA_VWSAMOUNT-KZWKURS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VWSAMOUNT-KZWKURS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit EXCRT, internal->external for field KHWKURS
CALL FUNCTION 'CONVERSION_EXIT_EXCRT_OUTPUT'
  EXPORTING
    input =                      WA_VWSAMOUNT-KHWKURS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VWSAMOUNT-KHWKURS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit EXCRT, internal->external for field KBWKURS
CALL FUNCTION 'CONVERSION_EXIT_EXCRT_OUTPUT'
  EXPORTING
    input =                      WA_VWSAMOUNT-KBWKURS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VWSAMOUNT-KBWKURS.
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_VWSAMOUNT_STR, 
WEBETR TYPE STRING,
BEBETR TYPE STRING,
WZBETR TYPE STRING,
BZBETR TYPE STRING,
BHWBETR TYPE STRING,
WBBETR TYPE STRING,
BBBETR TYPE STRING,
WPRICE TYPE STRING,
WSBETR TYPE STRING,
KZWKURS TYPE STRING,
KHWKURS TYPE STRING,
SKHWFIX TYPE STRING,
KBWKURS TYPE STRING,
DVALUT TYPE STRING,
DZTERM TYPE STRING,
DBESTAND TYPE STRING,
SSIGN TYPE STRING,
BUKRS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_VWSAMOUNT_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_VWSAMOUNT_STR-WEBETR sy-vline 
WA_VWSAMOUNT_STR-BEBETR sy-vline 
WA_VWSAMOUNT_STR-WZBETR sy-vline 
WA_VWSAMOUNT_STR-BZBETR sy-vline 
WA_VWSAMOUNT_STR-BHWBETR sy-vline 
WA_VWSAMOUNT_STR-WBBETR sy-vline 
WA_VWSAMOUNT_STR-BBBETR sy-vline 
WA_VWSAMOUNT_STR-WPRICE sy-vline 
WA_VWSAMOUNT_STR-WSBETR sy-vline 
WA_VWSAMOUNT_STR-KZWKURS sy-vline 
WA_VWSAMOUNT_STR-KHWKURS sy-vline 
WA_VWSAMOUNT_STR-SKHWFIX sy-vline 
WA_VWSAMOUNT_STR-KBWKURS sy-vline 
WA_VWSAMOUNT_STR-DVALUT sy-vline 
WA_VWSAMOUNT_STR-DZTERM sy-vline 
WA_VWSAMOUNT_STR-DBESTAND sy-vline 
WA_VWSAMOUNT_STR-SSIGN sy-vline 
WA_VWSAMOUNT_STR-BUKRS sy-vline      INTO ld_text SEPARATED BY SPACE.

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