ABAP Select data from SAP table VAKE_ERRO into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM VAKE_ERRO
*  INTO TABLE @DATA(IT_VAKE_ERRO2).
*--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_VAKE_ERRO INDEX 1 INTO DATA(WA_VAKE_ERRO2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<VAKE_ERRO>-KVEWE = 1.
<VAKE_ERRO>-KOTABNR = 1.
<VAKE_ERRO>-KAPPL = 1.
<VAKE_ERRO>-KSCHL = 1.
<VAKE_ERRO>-VAKEY = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_VAKE_ERRO-DATBI, sy-vline,
  WA_VAKE_ERRO-MSGID, sy-vline,
  WA_VAKE_ERRO-MSGTY, sy-vline,
  WA_VAKE_ERRO-MSGNO, sy-vline,
  WA_VAKE_ERRO-MSGV1, sy-vline,
  WA_VAKE_ERRO-MSGV2, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_VAKE_ERRO 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_VAKE_ERRO 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_VAKE_ERRO INTO WA_VAKE_ERRO.


*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 KOTAB, internal->external for field KOTABNR
CALL FUNCTION 'CONVERSION_EXIT_KOTAB_OUTPUT'
  EXPORTING
    input =                      WA_VAKE_ERRO-KOTABNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VAKE_ERRO-KOTABNR.
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_VAKE_ERRO_STR, 
KVEWE TYPE STRING,
KOTABNR TYPE STRING,
KAPPL TYPE STRING,
KSCHL TYPE STRING,
VAKEY TYPE STRING,
DATBI TYPE STRING,
MSGID TYPE STRING,
MSGTY TYPE STRING,
MSGNO TYPE STRING,
MSGV1 TYPE STRING,
MSGV2 TYPE STRING,
MSGV3 TYPE STRING,
MSGV4 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_VAKE_ERRO_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_VAKE_ERRO_STR-KVEWE sy-vline 
WA_VAKE_ERRO_STR-KOTABNR sy-vline 
WA_VAKE_ERRO_STR-KAPPL sy-vline 
WA_VAKE_ERRO_STR-KSCHL sy-vline 
WA_VAKE_ERRO_STR-VAKEY sy-vline 
WA_VAKE_ERRO_STR-DATBI sy-vline 
WA_VAKE_ERRO_STR-MSGID sy-vline 
WA_VAKE_ERRO_STR-MSGTY sy-vline 
WA_VAKE_ERRO_STR-MSGNO sy-vline 
WA_VAKE_ERRO_STR-MSGV1 sy-vline 
WA_VAKE_ERRO_STR-MSGV2 sy-vline 
WA_VAKE_ERRO_STR-MSGV3 sy-vline 
WA_VAKE_ERRO_STR-MSGV4 sy-vline      INTO ld_text SEPARATED BY SPACE.

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