ABAP Select data from SAP table T556R into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP T556R 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 T556R. 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 T556R 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_T556R TYPE STANDARD TABLE OF T556R,
      WA_T556R TYPE T556R,
      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: <T556R> TYPE T556R.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_T556R.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM T556R
  INTO TABLE IT_T556R.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM T556R
*  INTO TABLE @DATA(IT_T556R2).
*--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_T556R INDEX 1 INTO DATA(WA_T556R2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_T556R ASSIGNING <T556R>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<T556R>-MANDT = 1.
<T556R>-MOPGK = 1.
<T556R>-MOZKO = 1.
<T556R>-QTYPE = 1.
<T556R>-DEDRG = 1.

ENDLOOP.

LOOP AT IT_T556R INTO WA_T556R.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_T556R-ENDDA, sy-vline,
  WA_T556R-BEGDA, sy-vline,
  WA_T556R-ZEINH, sy-vline,
  WA_T556R-QTSEQ, sy-vline,
  WA_T556R-QTTPS, sy-vline,
  WA_T556R-QTTPR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_T556R 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_T556R 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_T556R INTO WA_T556R.


*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_T556R_STR, 
MANDT TYPE STRING,
MOPGK TYPE STRING,
MOZKO TYPE STRING,
QTYPE TYPE STRING,
DEDRG TYPE STRING,
ENDDA TYPE STRING,
BEGDA TYPE STRING,
ZEINH TYPE STRING,
QTSEQ TYPE STRING,
QTTPS TYPE STRING,
QTTPR TYPE STRING,
VABEG TYPE STRING,
VBDIR TYPE STRING,
VAEND TYPE STRING,
VEDIR TYPE STRING,
DEBEG TYPE STRING,
DBDIR TYPE STRING,
DEEND TYPE STRING,
DEDIR TYPE STRING,
TIBEG TYPE STRING,
TBDIR TYPE STRING,
TIEND TYPE STRING,
TEDIR TYPE STRING,
DEDSEQ_CE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_T556R_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_T556R_STR-MANDT sy-vline 
WA_T556R_STR-MOPGK sy-vline 
WA_T556R_STR-MOZKO sy-vline 
WA_T556R_STR-QTYPE sy-vline 
WA_T556R_STR-DEDRG sy-vline 
WA_T556R_STR-ENDDA sy-vline 
WA_T556R_STR-BEGDA sy-vline 
WA_T556R_STR-ZEINH sy-vline 
WA_T556R_STR-QTSEQ sy-vline 
WA_T556R_STR-QTTPS sy-vline 
WA_T556R_STR-QTTPR sy-vline 
WA_T556R_STR-VABEG sy-vline 
WA_T556R_STR-VBDIR sy-vline 
WA_T556R_STR-VAEND sy-vline 
WA_T556R_STR-VEDIR sy-vline 
WA_T556R_STR-DEBEG sy-vline 
WA_T556R_STR-DBDIR sy-vline 
WA_T556R_STR-DEEND sy-vline 
WA_T556R_STR-DEDIR sy-vline 
WA_T556R_STR-TIBEG sy-vline 
WA_T556R_STR-TBDIR sy-vline 
WA_T556R_STR-TIEND sy-vline 
WA_T556R_STR-TEDIR sy-vline 
WA_T556R_STR-DEDSEQ_CE sy-vline      INTO ld_text SEPARATED BY SPACE.

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