ABAP Select data from SAP table T476 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP T476 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 T476. 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 T476 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_T476 TYPE STANDARD TABLE OF T476,
      WA_T476 TYPE T476,
      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: <T476> TYPE T476.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_T476.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM T476
  INTO TABLE IT_T476.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM T476
*  INTO TABLE @DATA(IT_T4762).
*--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_T476 INDEX 1 INTO DATA(WA_T4762).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_T476 ASSIGNING <T476>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<T476>-MANDT = 1.
<T476>-SICHT = 1.
<T476>-STRAT = 1.
<T476>-SIMUL = 1.
<T476>-OBLIG = 1.

ENDLOOP.

LOOP AT IT_T476 INTO WA_T476.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_T476-MULTI, sy-vline,
  WA_T476-KNOWL, sy-vline,
  WA_T476-LOGO, sy-vline,
  WA_T476-NOF08, sy-vline,
  WA_T476-NOF11, sy-vline,
  WA_T476-NOF12, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_T476 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_T476 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_T476 INTO WA_T476.


*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_T476_STR, 
MANDT TYPE STRING,
SICHT TYPE STRING,
STRAT TYPE STRING,
SIMUL TYPE STRING,
OBLIG TYPE STRING,
MULTI TYPE STRING,
KNOWL TYPE STRING,
LOGO TYPE STRING,
NOF08 TYPE STRING,
NOF11 TYPE STRING,
NOF12 TYPE STRING,
NOF15 TYPE STRING,
DYNNR TYPE STRING,
VVIEW TYPE STRING,END OF T_EKKO_STR.
DATA: WA_T476_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_T476_STR-MANDT sy-vline 
WA_T476_STR-SICHT sy-vline 
WA_T476_STR-STRAT sy-vline 
WA_T476_STR-SIMUL sy-vline 
WA_T476_STR-OBLIG sy-vline 
WA_T476_STR-MULTI sy-vline 
WA_T476_STR-KNOWL sy-vline 
WA_T476_STR-LOGO sy-vline 
WA_T476_STR-NOF08 sy-vline 
WA_T476_STR-NOF11 sy-vline 
WA_T476_STR-NOF12 sy-vline 
WA_T476_STR-NOF15 sy-vline 
WA_T476_STR-DYNNR sy-vline 
WA_T476_STR-VVIEW sy-vline      INTO ld_text SEPARATED BY SPACE.

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