ABAP Select data from SAP table VVIS_SLST into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM VVIS_SLST
*  INTO TABLE @DATA(IT_VVIS_SLST2).
*--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_VVIS_SLST INDEX 1 INTO DATA(WA_VVIS_SLST2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<VVIS_SLST>-NO = 1.
<VVIS_SLST>-WEH = 1.
<VVIS_SLST>-GRU = 1.
<VVIS_SLST>-GEB = 1.
<VVIS_SLST>-MEH = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_VVIS_SLST-MIV, sy-vline,
  WA_VVIS_SLST-VWV, sy-vline,
  WA_VVIS_SLST-BEW, sy-vline,
  WA_VVIS_SLST-XMIV, sy-vline,
  WA_VVIS_SLST-XVWV, sy-vline,
  WA_VVIS_SLST-ZLS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_VVIS_SLST 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_VVIS_SLST 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_VVIS_SLST INTO WA_VVIS_SLST.


*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 SPDEV, internal->external for field PRI_DEST
CALL FUNCTION 'CONVERSION_EXIT_SPDEV_OUTPUT'
  EXPORTING
    input =                      WA_VVIS_SLST-PRI_DEST
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VVIS_SLST-PRI_DEST.
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_VVIS_SLST_STR, 
NO TYPE STRING,
WEH TYPE STRING,
GRU TYPE STRING,
GEB TYPE STRING,
MEH TYPE STRING,
MIV TYPE STRING,
VWV TYPE STRING,
BEW TYPE STRING,
XMIV TYPE STRING,
XVWV TYPE STRING,
ZLS TYPE STRING,
WEP TYPE STRING,
FREE1 TYPE STRING,
FREE2 TYPE STRING,
FREE3 TYPE STRING,
BTGFM TYPE STRING,
PRI_DEST TYPE STRING,
PRI_NAME TYPE STRING,
PRI_IMM TYPE STRING,
PRI_KEEP TYPE STRING,
PRI_NEWLID TYPE STRING,
PRI_NOKEEP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_VVIS_SLST_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_VVIS_SLST_STR-NO sy-vline 
WA_VVIS_SLST_STR-WEH sy-vline 
WA_VVIS_SLST_STR-GRU sy-vline 
WA_VVIS_SLST_STR-GEB sy-vline 
WA_VVIS_SLST_STR-MEH sy-vline 
WA_VVIS_SLST_STR-MIV sy-vline 
WA_VVIS_SLST_STR-VWV sy-vline 
WA_VVIS_SLST_STR-BEW sy-vline 
WA_VVIS_SLST_STR-XMIV sy-vline 
WA_VVIS_SLST_STR-XVWV sy-vline 
WA_VVIS_SLST_STR-ZLS sy-vline 
WA_VVIS_SLST_STR-WEP sy-vline 
WA_VVIS_SLST_STR-FREE1 sy-vline 
WA_VVIS_SLST_STR-FREE2 sy-vline 
WA_VVIS_SLST_STR-FREE3 sy-vline 
WA_VVIS_SLST_STR-BTGFM sy-vline 
WA_VVIS_SLST_STR-PRI_DEST sy-vline 
WA_VVIS_SLST_STR-PRI_NAME sy-vline 
WA_VVIS_SLST_STR-PRI_IMM sy-vline 
WA_VVIS_SLST_STR-PRI_KEEP sy-vline 
WA_VVIS_SLST_STR-PRI_NEWLID sy-vline 
WA_VVIS_SLST_STR-PRI_NOKEEP sy-vline      INTO ld_text SEPARATED BY SPACE.

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