ABAP Select data from SAP table LTR2_DSCR_VEND into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP LTR2_DSCR_VEND 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 LTR2_DSCR_VEND. 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 LTR2_DSCR_VEND 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_LTR2_DSCR_VEND TYPE STANDARD TABLE OF LTR2_DSCR_VEND,
      WA_LTR2_DSCR_VEND TYPE LTR2_DSCR_VEND,
      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: <LTR2_DSCR_VEND> TYPE LTR2_DSCR_VEND.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_LTR2_DSCR_VEND.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM LTR2_DSCR_VEND
  INTO TABLE IT_LTR2_DSCR_VEND.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM LTR2_DSCR_VEND
*  INTO TABLE @DATA(IT_LTR2_DSCR_VEND2).
*--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_LTR2_DSCR_VEND INDEX 1 INTO DATA(WA_LTR2_DSCR_VEND2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_LTR2_DSCR_VEND ASSIGNING <LTR2_DSCR_VEND>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<LTR2_DSCR_VEND>-WS_GUID = 1.
<LTR2_DSCR_VEND>-LINE = 1.
<LTR2_DSCR_VEND>-LAND1 = 1.
<LTR2_DSCR_VEND>-ANRED = 1.
<LTR2_DSCR_VEND>-NAME1 = 1.

ENDLOOP.

LOOP AT IT_LTR2_DSCR_VEND INTO WA_LTR2_DSCR_VEND.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_LTR2_DSCR_VEND-NAME2, sy-vline,
  WA_LTR2_DSCR_VEND-NAME3, sy-vline,
  WA_LTR2_DSCR_VEND-NAME4, sy-vline,
  WA_LTR2_DSCR_VEND-ORT01, sy-vline,
  WA_LTR2_DSCR_VEND-ORT02, sy-vline,
  WA_LTR2_DSCR_VEND-PFACH, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_LTR2_DSCR_VEND 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_LTR2_DSCR_VEND 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_LTR2_DSCR_VEND INTO WA_LTR2_DSCR_VEND.


*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_LTR2_DSCR_VEND_STR, 
WS_GUID TYPE STRING,
LINE TYPE STRING,
LAND1 TYPE STRING,
ANRED TYPE STRING,
NAME1 TYPE STRING,
NAME2 TYPE STRING,
NAME3 TYPE STRING,
NAME4 TYPE STRING,
ORT01 TYPE STRING,
ORT02 TYPE STRING,
PFACH TYPE STRING,
PSTL2 TYPE STRING,
PSTLZ TYPE STRING,
REGIO TYPE STRING,
SORTL TYPE STRING,
STRAS TYPE STRING,
ADRNR TYPE STRING,
MCOD1 TYPE STRING,
MCOD2 TYPE STRING,
MCOD3 TYPE STRING,
STCD1 TYPE STRING,
STCD2 TYPE STRING,
TELBX TYPE STRING,
TELF1 TYPE STRING,
TELF2 TYPE STRING,
TELFX TYPE STRING,
TELTX TYPE STRING,
TELX1 TYPE STRING,
STCEG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_LTR2_DSCR_VEND_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_LTR2_DSCR_VEND_STR-WS_GUID sy-vline 
WA_LTR2_DSCR_VEND_STR-LINE sy-vline 
WA_LTR2_DSCR_VEND_STR-LAND1 sy-vline 
WA_LTR2_DSCR_VEND_STR-ANRED sy-vline 
WA_LTR2_DSCR_VEND_STR-NAME1 sy-vline 
WA_LTR2_DSCR_VEND_STR-NAME2 sy-vline 
WA_LTR2_DSCR_VEND_STR-NAME3 sy-vline 
WA_LTR2_DSCR_VEND_STR-NAME4 sy-vline 
WA_LTR2_DSCR_VEND_STR-ORT01 sy-vline 
WA_LTR2_DSCR_VEND_STR-ORT02 sy-vline 
WA_LTR2_DSCR_VEND_STR-PFACH sy-vline 
WA_LTR2_DSCR_VEND_STR-PSTL2 sy-vline 
WA_LTR2_DSCR_VEND_STR-PSTLZ sy-vline 
WA_LTR2_DSCR_VEND_STR-REGIO sy-vline 
WA_LTR2_DSCR_VEND_STR-SORTL sy-vline 
WA_LTR2_DSCR_VEND_STR-STRAS sy-vline 
WA_LTR2_DSCR_VEND_STR-ADRNR sy-vline 
WA_LTR2_DSCR_VEND_STR-MCOD1 sy-vline 
WA_LTR2_DSCR_VEND_STR-MCOD2 sy-vline 
WA_LTR2_DSCR_VEND_STR-MCOD3 sy-vline 
WA_LTR2_DSCR_VEND_STR-STCD1 sy-vline 
WA_LTR2_DSCR_VEND_STR-STCD2 sy-vline 
WA_LTR2_DSCR_VEND_STR-TELBX sy-vline 
WA_LTR2_DSCR_VEND_STR-TELF1 sy-vline 
WA_LTR2_DSCR_VEND_STR-TELF2 sy-vline 
WA_LTR2_DSCR_VEND_STR-TELFX sy-vline 
WA_LTR2_DSCR_VEND_STR-TELTX sy-vline 
WA_LTR2_DSCR_VEND_STR-TELX1 sy-vline 
WA_LTR2_DSCR_VEND_STR-STCEG sy-vline      INTO ld_text SEPARATED BY SPACE.

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