ABAP Select data from SAP table LDPRF into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM LDPRF
*  INTO TABLE @DATA(IT_LDPRF2).
*--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_LDPRF INDEX 1 INTO DATA(WA_LDPRF2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<LDPRF>-MANDT = 1.
<LDPRF>-APPLC = 1.
<LDPRF>-LOCAT = 1.
<LDPRF>-DPROF = 1.
<LDPRF>-SIZLN = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_LDPRF-MSGLN, sy-vline,
  WA_LDPRF-NUMMN, sy-vline,
  WA_LDPRF-SIZPB, sy-vline,
  WA_LDPRF-NUMPB, sy-vline,
  WA_LDPRF-TEMPL, sy-vline,
  WA_LDPRF-SLIST, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_LDPRF 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_LDPRF 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_LDPRF INTO WA_LDPRF.


*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_LDPRF_STR, 
MANDT TYPE STRING,
APPLC TYPE STRING,
LOCAT TYPE STRING,
DPROF TYPE STRING,
SIZLN TYPE STRING,
MSGLN TYPE STRING,
NUMMN TYPE STRING,
SIZPB TYPE STRING,
NUMPB TYPE STRING,
TEMPL TYPE STRING,
SLIST TYPE STRING,END OF T_EKKO_STR.
DATA: WA_LDPRF_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_LDPRF_STR-MANDT sy-vline 
WA_LDPRF_STR-APPLC sy-vline 
WA_LDPRF_STR-LOCAT sy-vline 
WA_LDPRF_STR-DPROF sy-vline 
WA_LDPRF_STR-SIZLN sy-vline 
WA_LDPRF_STR-MSGLN sy-vline 
WA_LDPRF_STR-NUMMN sy-vline 
WA_LDPRF_STR-SIZPB sy-vline 
WA_LDPRF_STR-NUMPB sy-vline 
WA_LDPRF_STR-TEMPL sy-vline 
WA_LDPRF_STR-SLIST sy-vline      INTO ld_text SEPARATED BY SPACE.

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