ABAP Select data from SAP table D1000 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP D1000 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 D1000. 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 D1000 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_D1000 TYPE STANDARD TABLE OF D1000,
      WA_D1000 TYPE D1000,
      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: <D1000> TYPE D1000.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_D1000.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM D1000
  INTO TABLE IT_D1000.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM D1000
*  INTO TABLE @DATA(IT_D10002).
*--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_D1000 INDEX 1 INTO DATA(WA_D10002).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_D1000 ASSIGNING <D1000>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<D1000>-PERNR = 1.
<D1000>-BEGDA = 1.
<D1000>-ENDDA = 1.
<D1000>-ABRDT = 1.
<D1000>-BESNR = 1.

ENDLOOP.

LOOP AT IT_D1000 INTO WA_D1000.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_D1000-BSTXT, sy-vline,
  WA_D1000-PTEXT, sy-vline,
  WA_D1000-PKTEX, sy-vline,
  WA_D1000-NAME1, sy-vline,
  WA_D1000-BTEXT, sy-vline,
  WA_D1000-SICKD, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_D1000 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_D1000 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_D1000 INTO WA_D1000.


*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_D1000_STR, 
PERNR TYPE STRING,
BEGDA TYPE STRING,
ENDDA TYPE STRING,
ABRDT TYPE STRING,
BESNR TYPE STRING,
BSTXT TYPE STRING,
PTEXT TYPE STRING,
PKTEX TYPE STRING,
NAME1 TYPE STRING,
BTEXT TYPE STRING,
SICKD TYPE STRING,
NAME TYPE STRING,
TARIF TYPE STRING,
WAERS TYPE STRING,
LAND TYPE STRING,END OF T_EKKO_STR.
DATA: WA_D1000_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_D1000_STR-PERNR sy-vline 
WA_D1000_STR-BEGDA sy-vline 
WA_D1000_STR-ENDDA sy-vline 
WA_D1000_STR-ABRDT sy-vline 
WA_D1000_STR-BESNR sy-vline 
WA_D1000_STR-BSTXT sy-vline 
WA_D1000_STR-PTEXT sy-vline 
WA_D1000_STR-PKTEX sy-vline 
WA_D1000_STR-NAME1 sy-vline 
WA_D1000_STR-BTEXT sy-vline 
WA_D1000_STR-SICKD sy-vline 
WA_D1000_STR-NAME sy-vline 
WA_D1000_STR-TARIF sy-vline 
WA_D1000_STR-WAERS sy-vline 
WA_D1000_STR-LAND sy-vline      INTO ld_text SEPARATED BY SPACE.

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