ABAP Select data from SAP table DD24H into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

Below is a number of ABAP code snippets to demonstrate how to select data from SAP DD24H 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 DD24H. 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 DD24H 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_DD24H TYPE STANDARD TABLE OF DD24H,
      WA_DD24H TYPE DD24H,
      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: <DD24H> TYPE DD24H.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_DD24H.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM DD24H
  INTO TABLE IT_DD24H.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DD24H
*  INTO TABLE @DATA(IT_DD24H2).
*--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_DD24H INDEX 1 INTO DATA(WA_DD24H2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_DD24H ASSIGNING <DD24H>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DD24H>-MCONAME = 1.
<DD24H>-MCID = 1.
<DD24H>-IDPOS = 1.
<DD24H>-MCFIELDN = 1.
<DD24H>-TABNAME = 1.

ENDLOOP.

LOOP AT IT_DD24H INTO WA_DD24H.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DD24H-FIELDNAME, sy-vline,
  WA_DD24H-FLENGTH, sy-vline,
  WA_DD24H-OFFSET, sy-vline,
  WA_DD24H-NOUPPER, sy-vline,
  WA_DD24H-SCRLEN_S, sy-vline,
  WA_DD24H-SCRLEN_M, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DD24H 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_DD24H 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_DD24H INTO WA_DD24H.


*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 DTYPE, internal->external for field DATATYPE
CALL FUNCTION 'CONVERSION_EXIT_DTYPE_OUTPUT'
  EXPORTING
    input =                      WA_DD24H-DATATYPE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DD24H-DATATYPE.
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_DD24H_STR, 
MCONAME TYPE STRING,
MCID TYPE STRING,
IDPOS TYPE STRING,
MCFIELDN TYPE STRING,
TABNAME TYPE STRING,
FIELDNAME TYPE STRING,
FLENGTH TYPE STRING,
OFFSET TYPE STRING,
NOUPPER TYPE STRING,
SCRLEN_S TYPE STRING,
SCRLEN_M TYPE STRING,
SCRLEN_L TYPE STRING,
SCRTEXT_S TYPE STRING,
SCRTEXT_M TYPE STRING,
SCRTEXT_L TYPE STRING,
GPA TYPE STRING,
MEMID TYPE STRING,
DATATYPE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DD24H_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_DD24H_STR-MCONAME sy-vline 
WA_DD24H_STR-MCID sy-vline 
WA_DD24H_STR-IDPOS sy-vline 
WA_DD24H_STR-MCFIELDN sy-vline 
WA_DD24H_STR-TABNAME sy-vline 
WA_DD24H_STR-FIELDNAME sy-vline 
WA_DD24H_STR-FLENGTH sy-vline 
WA_DD24H_STR-OFFSET sy-vline 
WA_DD24H_STR-NOUPPER sy-vline 
WA_DD24H_STR-SCRLEN_S sy-vline 
WA_DD24H_STR-SCRLEN_M sy-vline 
WA_DD24H_STR-SCRLEN_L sy-vline 
WA_DD24H_STR-SCRTEXT_S sy-vline 
WA_DD24H_STR-SCRTEXT_M sy-vline 
WA_DD24H_STR-SCRTEXT_L sy-vline 
WA_DD24H_STR-GPA sy-vline 
WA_DD24H_STR-MEMID sy-vline 
WA_DD24H_STR-DATATYPE sy-vline      INTO ld_text SEPARATED BY SPACE.

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