ABAP Select data from SAP table NLAANLEVER_REQUEST into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM NLAANLEVER_REQUEST
*  INTO TABLE @DATA(IT_NLAANLEVER_REQUEST2).
*--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_NLAANLEVER_REQUEST INDEX 1 INTO DATA(WA_NLAANLEVER_REQUEST2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<NLAANLEVER_REQUEST>-CONTROLLER = 1.
<NLAANLEVER_REQUEST>-KENMERK = 1.
<NLAANLEVER_REQUEST>-BERICHTSOORT = 1.
<NLAANLEVER_REQUEST>-AANLEVERKENMERK = 1.
<NLAANLEVER_REQUEST>-EERDER_AANLEVERKENMERK = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_NLAANLEVER_REQUEST-IDENTITEIT_BELANGHEBBENDE, sy-vline,
  WA_NLAANLEVER_REQUEST-CONTROLLER, sy-vline,
  WA_NLAANLEVER_REQUEST-NUMMER, sy-vline,
  WA_NLAANLEVER_REQUEST-TYPE, sy-vline,
  WA_NLAANLEVER_REQUEST-ROL_BELANGHEBBENDE, sy-vline,
  WA_NLAANLEVER_REQUEST-IDENTITEIT_ONTVANGER, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_NLAANLEVER_REQUEST 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_NLAANLEVER_REQUEST 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_NLAANLEVER_REQUEST INTO WA_NLAANLEVER_REQUEST.


*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_NLAANLEVER_REQUEST_STR, 
CONTROLLER TYPE STRING,
KENMERK TYPE STRING,
BERICHTSOORT TYPE STRING,
AANLEVERKENMERK TYPE STRING,
EERDER_AANLEVERKENMERK TYPE STRING,
IDENTITEIT_BELANGHEBBENDE TYPE STRING,
CONTROLLER TYPE STRING,
NUMMER TYPE STRING,
TYPE TYPE STRING,
ROL_BELANGHEBBENDE TYPE STRING,
IDENTITEIT_ONTVANGER TYPE STRING,
CONTROLLER TYPE STRING,
NUMMER TYPE STRING,
TYPE TYPE STRING,
ROL_ONTVANGER TYPE STRING,
BERICHT_INHOUD TYPE STRING,
CONTROLLER TYPE STRING,
MIME_TYPE TYPE STRING,
BESTANDSNAAM TYPE STRING,
INHOUD TYPE STRING,
BERICHT_BIJLAGEN TYPE STRING,
CONTROLLER TYPE STRING,
BIJLAGE TYPE STRING,
AUTORISATIE_ADRES TYPE STRING,END OF T_EKKO_STR.
DATA: WA_NLAANLEVER_REQUEST_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_NLAANLEVER_REQUEST_STR-CONTROLLER sy-vline 
WA_NLAANLEVER_REQUEST_STR-KENMERK sy-vline 
WA_NLAANLEVER_REQUEST_STR-BERICHTSOORT sy-vline 
WA_NLAANLEVER_REQUEST_STR-AANLEVERKENMERK sy-vline 
WA_NLAANLEVER_REQUEST_STR-EERDER_AANLEVERKENMERK sy-vline 
WA_NLAANLEVER_REQUEST_STR-IDENTITEIT_BELANGHEBBENDE sy-vline 
WA_NLAANLEVER_REQUEST_STR-CONTROLLER sy-vline 
WA_NLAANLEVER_REQUEST_STR-NUMMER sy-vline 
WA_NLAANLEVER_REQUEST_STR-TYPE sy-vline 
WA_NLAANLEVER_REQUEST_STR-ROL_BELANGHEBBENDE sy-vline 
WA_NLAANLEVER_REQUEST_STR-IDENTITEIT_ONTVANGER sy-vline 
WA_NLAANLEVER_REQUEST_STR-CONTROLLER sy-vline 
WA_NLAANLEVER_REQUEST_STR-NUMMER sy-vline 
WA_NLAANLEVER_REQUEST_STR-TYPE sy-vline 
WA_NLAANLEVER_REQUEST_STR-ROL_ONTVANGER sy-vline 
WA_NLAANLEVER_REQUEST_STR-BERICHT_INHOUD sy-vline 
WA_NLAANLEVER_REQUEST_STR-CONTROLLER sy-vline 
WA_NLAANLEVER_REQUEST_STR-MIME_TYPE sy-vline 
WA_NLAANLEVER_REQUEST_STR-BESTANDSNAAM sy-vline 
WA_NLAANLEVER_REQUEST_STR-INHOUD sy-vline 
WA_NLAANLEVER_REQUEST_STR-BERICHT_BIJLAGEN sy-vline 
WA_NLAANLEVER_REQUEST_STR-CONTROLLER sy-vline 
WA_NLAANLEVER_REQUEST_STR-BIJLAGE sy-vline 
WA_NLAANLEVER_REQUEST_STR-AUTORISATIE_ADRES sy-vline      INTO ld_text SEPARATED BY SPACE.

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