ABAP Select data from SAP table TPR_PREF into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TPR_PREF
*  INTO TABLE @DATA(IT_TPR_PREF2).
*--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_TPR_PREF INDEX 1 INTO DATA(WA_TPR_PREF2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TPR_PREF>-MANDT = 1.
<TPR_PREF>-UNAME = 1.
<TPR_PREF>-VARIANTS = 1.
<TPR_PREF>-VARIABLES = 1.
<TPR_PREF>-SAFETY = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TPR_PREF-TECHNAM, sy-vline,
  WA_TPR_PREF-OVERVIEW, sy-vline,
  WA_TPR_PREF-MERGEICON, sy-vline,
  WA_TPR_PREF-COPYICON, sy-vline,
  WA_TPR_PREF-DELICON, sy-vline,
  WA_TPR_PREF-SHOW_DATE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TPR_PREF 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_TPR_PREF 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_TPR_PREF INTO WA_TPR_PREF.


*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_TPR_PREF_STR, 
MANDT TYPE STRING,
UNAME TYPE STRING,
VARIANTS TYPE STRING,
VARIABLES TYPE STRING,
SAFETY TYPE STRING,
TECHNAM TYPE STRING,
OVERVIEW TYPE STRING,
MERGEICON TYPE STRING,
COPYICON TYPE STRING,
DELICON TYPE STRING,
SHOW_DATE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TPR_PREF_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_TPR_PREF_STR-MANDT sy-vline 
WA_TPR_PREF_STR-UNAME sy-vline 
WA_TPR_PREF_STR-VARIANTS sy-vline 
WA_TPR_PREF_STR-VARIABLES sy-vline 
WA_TPR_PREF_STR-SAFETY sy-vline 
WA_TPR_PREF_STR-TECHNAM sy-vline 
WA_TPR_PREF_STR-OVERVIEW sy-vline 
WA_TPR_PREF_STR-MERGEICON sy-vline 
WA_TPR_PREF_STR-COPYICON sy-vline 
WA_TPR_PREF_STR-DELICON sy-vline 
WA_TPR_PREF_STR-SHOW_DATE sy-vline      INTO ld_text SEPARATED BY SPACE.

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