SAP VAAMPL ABAP Select data from SAP table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM VAAMPL
*  INTO TABLE @DATA(IT_VAAMPL2).
*--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_VAAMPL INDEX 1 INTO DATA(WA_VAAMPL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<VAAMPL>-MANDT = 1.
<VAAMPL>-BMATN = 1.
<VAAMPL>-AMPNR = 1.
<VAAMPL>-EMATN = 1.
<VAAMPL>-MFRNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_VAAMPL-WERKS, sy-vline,
  WA_VAAMPL-DATUV, sy-vline,
  WA_VAAMPL-DATUB, sy-vline,
  WA_VAAMPL-REVLV, sy-vline,
  WA_VAAMPL-AMPSP, sy-vline,
  WA_VAAMPL-REOAM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_VAAMPL 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_VAAMPL 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_VAAMPL INTO WA_VAAMPL.


*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 BMATN
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_VAAMPL-BMATN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VAAMPL-BMATN.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit NUMCV, internal->external for field REVLV
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_VAAMPL-REVLV
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VAAMPL-REVLV.
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_VAAMPL_STR, 
MANDT TYPE STRING,
BMATN TYPE STRING,
AMPNR TYPE STRING,
EMATN TYPE STRING,
MFRNR TYPE STRING,
WERKS TYPE STRING,
DATUV TYPE STRING,
DATUB TYPE STRING,
REVLV TYPE STRING,
AMPSP TYPE STRING,
REOAM TYPE STRING,
ERDAT TYPE STRING,
ERNAM TYPE STRING,
KZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_VAAMPL_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_VAAMPL_STR-MANDT sy-vline 
WA_VAAMPL_STR-BMATN sy-vline 
WA_VAAMPL_STR-AMPNR sy-vline 
WA_VAAMPL_STR-EMATN sy-vline 
WA_VAAMPL_STR-MFRNR sy-vline 
WA_VAAMPL_STR-WERKS sy-vline 
WA_VAAMPL_STR-DATUV sy-vline 
WA_VAAMPL_STR-DATUB sy-vline 
WA_VAAMPL_STR-REVLV sy-vline 
WA_VAAMPL_STR-AMPSP sy-vline 
WA_VAAMPL_STR-REOAM sy-vline 
WA_VAAMPL_STR-ERDAT sy-vline 
WA_VAAMPL_STR-ERNAM sy-vline 
WA_VAAMPL_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.

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