ABAP Select data from SAP table ILMDVLVISITITEM into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ILMDVLVISITITEM
*  INTO TABLE @DATA(IT_ILMDVLVISITITEM2).
*--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_ILMDVLVISITITEM INDEX 1 INTO DATA(WA_ILMDVLVISITITEM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ILMDVLVISITITEM>-MANDT = 1.
<ILMDVLVISITITEM>-LASTMILEVISITITEMUUID = 1.
<ILMDVLVISITITEM>-LASTMILEVISITUUID = 1.
<ILMDVLVISITITEM>-LASTMILEVISITLISTUUID = 1.
<ILMDVLVISITITEM>-LASTMILEVISITITEMID = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ILMDVLVISITITEM-LASTMILEVISITITEMEXTUUID, sy-vline,
  WA_ILMDVLVISITITEM-LASTMILEVISITITEMCATEGORY, sy-vline,
  WA_ILMDVLVISITITEM-LASTMILEVISITITEMDURATION, sy-vline,
  WA_ILMDVLVISITITEM-LASTMILEVISITITEMDESCRIPTION, sy-vline,
  WA_ILMDVLVISITITEM-LASTMILEVISITITEMPRIORITY, sy-vline,
  WA_ILMDVLVISITITEM-LASTMILEVISITITEMSTATUS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ILMDVLVISITITEM 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_ILMDVLVISITITEM 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_ILMDVLVISITITEM INTO WA_ILMDVLVISITITEM.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_ILMDVLVISITITEM_STR, 
MANDT TYPE STRING,
LASTMILEVISITITEMUUID TYPE STRING,
LASTMILEVISITUUID TYPE STRING,
LASTMILEVISITLISTUUID TYPE STRING,
LASTMILEVISITITEMID TYPE STRING,
LASTMILEVISITITEMEXTUUID TYPE STRING,
LASTMILEVISITITEMCATEGORY TYPE STRING,
LASTMILEVISITITEMDURATION TYPE STRING,
LASTMILEVISITITEMDESCRIPTION TYPE STRING,
LASTMILEVISITITEMPRIORITY TYPE STRING,
LASTMILEVISITITEMSTATUS TYPE STRING,
LASTMILEVISITITEMACTDRIVERID TYPE STRING,
SALESORGANIZATION TYPE STRING,
DISTRIBUTIONCHANNEL TYPE STRING,
DIVISION TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ILMDVLVISITITEM_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_ILMDVLVISITITEM_STR-MANDT sy-vline 
WA_ILMDVLVISITITEM_STR-LASTMILEVISITITEMUUID sy-vline 
WA_ILMDVLVISITITEM_STR-LASTMILEVISITUUID sy-vline 
WA_ILMDVLVISITITEM_STR-LASTMILEVISITLISTUUID sy-vline 
WA_ILMDVLVISITITEM_STR-LASTMILEVISITITEMID sy-vline 
WA_ILMDVLVISITITEM_STR-LASTMILEVISITITEMEXTUUID sy-vline 
WA_ILMDVLVISITITEM_STR-LASTMILEVISITITEMCATEGORY sy-vline 
WA_ILMDVLVISITITEM_STR-LASTMILEVISITITEMDURATION sy-vline 
WA_ILMDVLVISITITEM_STR-LASTMILEVISITITEMDESCRIPTION sy-vline 
WA_ILMDVLVISITITEM_STR-LASTMILEVISITITEMPRIORITY sy-vline 
WA_ILMDVLVISITITEM_STR-LASTMILEVISITITEMSTATUS sy-vline 
WA_ILMDVLVISITITEM_STR-LASTMILEVISITITEMACTDRIVERID sy-vline 
WA_ILMDVLVISITITEM_STR-SALESORGANIZATION sy-vline 
WA_ILMDVLVISITITEM_STR-DISTRIBUTIONCHANNEL sy-vline 
WA_ILMDVLVISITITEM_STR-DIVISION sy-vline      INTO ld_text SEPARATED BY SPACE.

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