ABAP Select data from SAP table BUFFER_VIAK25 into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

Below is a number of ABAP code snippets to demonstrate how to select data from SAP BUFFER_VIAK25 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 BUFFER_VIAK25. 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 BUFFER_VIAK25 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_BUFFER_VIAK25 TYPE STANDARD TABLE OF BUFFER_VIAK25,
      WA_BUFFER_VIAK25 TYPE BUFFER_VIAK25,
      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: <BUFFER_VIAK25> TYPE BUFFER_VIAK25.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_BUFFER_VIAK25.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM BUFFER_VIAK25
  INTO TABLE IT_BUFFER_VIAK25.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM BUFFER_VIAK25
*  INTO TABLE @DATA(IT_BUFFER_VIAK252).
*--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_BUFFER_VIAK25 INDEX 1 INTO DATA(WA_BUFFER_VIAK252).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_BUFFER_VIAK25 ASSIGNING <BUFFER_VIAK25>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<BUFFER_VIAK25>-MANDT = 1.
<BUFFER_VIAK25>-BUKRS = 1.
<BUFFER_VIAK25>-SWENR = 1.
<BUFFER_VIAK25>-SNKSL = 1.
<BUFFER_VIAK25>-SEMPSL = 1.

ENDLOOP.

LOOP AT IT_BUFFER_VIAK25 INTO WA_BUFFER_VIAK25.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_BUFFER_VIAK25-DPERBEG, sy-vline,
  WA_BUFFER_VIAK25-NPERSOND, sy-vline,
  WA_BUFFER_VIAK25-DPEREND, sy-vline,
  WA_BUFFER_VIAK25-OBJNR, sy-vline,
  WA_BUFFER_VIAK25-ABRVAR, sy-vline,
  WA_BUFFER_VIAK25-DABRECHN, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_BUFFER_VIAK25 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_BUFFER_VIAK25 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_BUFFER_VIAK25 INTO WA_BUFFER_VIAK25.


*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 SWENR, internal->external for field SWENR
CALL FUNCTION 'CONVERSION_EXIT_SWENR_OUTPUT'
  EXPORTING
    input =                      WA_BUFFER_VIAK25-SWENR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BUFFER_VIAK25-SWENR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field SNKSL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_BUFFER_VIAK25-SNKSL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BUFFER_VIAK25-SNKSL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field SEMPSL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_BUFFER_VIAK25-SEMPSL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BUFFER_VIAK25-SEMPSL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field NAJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_BUFFER_VIAK25-NAJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BUFFER_VIAK25-NAJAHR.
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_BUFFER_VIAK25_STR, 
MANDT TYPE STRING,
BUKRS TYPE STRING,
SWENR TYPE STRING,
SNKSL TYPE STRING,
SEMPSL TYPE STRING,
DPERBEG TYPE STRING,
NPERSOND TYPE STRING,
DPEREND TYPE STRING,
OBJNR TYPE STRING,
ABRVAR TYPE STRING,
DABRECHN TYPE STRING,
DPEROEFF TYPE STRING,
DPERSCHL TYPE STRING,
NAJAHR TYPE STRING,
BEINHNET TYPE STRING,
BEINHBRT TYPE STRING,
VVABBLN TYPE STRING,
PAUSFW TYPE STRING,
PVWHON TYPE STRING,
HOARECH TYPE STRING,
HOVVABBLN TYPE STRING,
NOT_FOUND TYPE STRING,END OF T_EKKO_STR.
DATA: WA_BUFFER_VIAK25_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_BUFFER_VIAK25_STR-MANDT sy-vline 
WA_BUFFER_VIAK25_STR-BUKRS sy-vline 
WA_BUFFER_VIAK25_STR-SWENR sy-vline 
WA_BUFFER_VIAK25_STR-SNKSL sy-vline 
WA_BUFFER_VIAK25_STR-SEMPSL sy-vline 
WA_BUFFER_VIAK25_STR-DPERBEG sy-vline 
WA_BUFFER_VIAK25_STR-NPERSOND sy-vline 
WA_BUFFER_VIAK25_STR-DPEREND sy-vline 
WA_BUFFER_VIAK25_STR-OBJNR sy-vline 
WA_BUFFER_VIAK25_STR-ABRVAR sy-vline 
WA_BUFFER_VIAK25_STR-DABRECHN sy-vline 
WA_BUFFER_VIAK25_STR-DPEROEFF sy-vline 
WA_BUFFER_VIAK25_STR-DPERSCHL sy-vline 
WA_BUFFER_VIAK25_STR-NAJAHR sy-vline 
WA_BUFFER_VIAK25_STR-BEINHNET sy-vline 
WA_BUFFER_VIAK25_STR-BEINHBRT sy-vline 
WA_BUFFER_VIAK25_STR-VVABBLN sy-vline 
WA_BUFFER_VIAK25_STR-PAUSFW sy-vline 
WA_BUFFER_VIAK25_STR-PVWHON sy-vline 
WA_BUFFER_VIAK25_STR-HOARECH sy-vline 
WA_BUFFER_VIAK25_STR-HOVVABBLN sy-vline 
WA_BUFFER_VIAK25_STR-NOT_FOUND sy-vline      INTO ld_text SEPARATED BY SPACE.

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