ABAP Select data from SAP table VIAK05 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 VIAK05 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 VIAK05. 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 VIAK05 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_VIAK05 TYPE STANDARD TABLE OF VIAK05,
      WA_VIAK05 TYPE VIAK05,
      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: <VIAK05> TYPE VIAK05.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_VIAK05.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM VIAK05
  INTO TABLE IT_VIAK05.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM VIAK05
*  INTO TABLE @DATA(IT_VIAK052).
*--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_VIAK05 INDEX 1 INTO DATA(WA_VIAK052).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_VIAK05 ASSIGNING <VIAK05>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<VIAK05>-MANDT = 1.
<VIAK05>-BUKRS = 1.
<VIAK05>-SWENR = 1.
<VIAK05>-SNKSL = 1.
<VIAK05>-SEMPSL = 1.

ENDLOOP.

LOOP AT IT_VIAK05 INTO WA_VIAK05.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_VIAK05-DGUELEMP, sy-vline,
  WA_VIAK05-STATUSAE, sy-vline,
  WA_VIAK05-SETNAME, sy-vline,
  WA_VIAK05-RERF, sy-vline,
  WA_VIAK05-DERF, sy-vline,
  WA_VIAK05-TERF, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_VIAK05 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_VIAK05 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_VIAK05 INTO WA_VIAK05.


*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_VIAK05-SWENR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VIAK05-SWENR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field SNKSL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VIAK05-SNKSL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VIAK05-SNKSL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field SEMPSL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VIAK05-SEMPSL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VIAK05-SEMPSL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field STEILNME
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VIAK05-STEILNME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VIAK05-STEILNME.
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_VIAK05_STR, 
MANDT TYPE STRING,
BUKRS TYPE STRING,
SWENR TYPE STRING,
SNKSL TYPE STRING,
SEMPSL TYPE STRING,
DGUELEMP TYPE STRING,
STATUSAE TYPE STRING,
SETNAME TYPE STRING,
RERF TYPE STRING,
DERF TYPE STRING,
TERF TYPE STRING,
REHER TYPE STRING,
RBEAR TYPE STRING,
DBEAR TYPE STRING,
TBEAR TYPE STRING,
RBHER TYPE STRING,
RSPOID TYPE STRING,
STEILNME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_VIAK05_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_VIAK05_STR-MANDT sy-vline 
WA_VIAK05_STR-BUKRS sy-vline 
WA_VIAK05_STR-SWENR sy-vline 
WA_VIAK05_STR-SNKSL sy-vline 
WA_VIAK05_STR-SEMPSL sy-vline 
WA_VIAK05_STR-DGUELEMP sy-vline 
WA_VIAK05_STR-STATUSAE sy-vline 
WA_VIAK05_STR-SETNAME sy-vline 
WA_VIAK05_STR-RERF sy-vline 
WA_VIAK05_STR-DERF sy-vline 
WA_VIAK05_STR-TERF sy-vline 
WA_VIAK05_STR-REHER sy-vline 
WA_VIAK05_STR-RBEAR sy-vline 
WA_VIAK05_STR-DBEAR sy-vline 
WA_VIAK05_STR-TBEAR sy-vline 
WA_VIAK05_STR-RBHER sy-vline 
WA_VIAK05_STR-RSPOID sy-vline 
WA_VIAK05_STR-STEILNME sy-vline      INTO ld_text SEPARATED BY SPACE.

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