ABAP Select data from SAP table T559E into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP T559E 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 T559E. 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 T559E 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_T559E TYPE STANDARD TABLE OF T559E,
      WA_T559E TYPE T559E,
      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: <T559E> TYPE T559E.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_T559E.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM T559E
  INTO TABLE IT_T559E.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM T559E
*  INTO TABLE @DATA(IT_T559E2).
*--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_T559E INDEX 1 INTO DATA(WA_T559E2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_T559E ASSIGNING <T559E>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<T559E>-MANDT = 1.
<T559E>-MOPGK = 1.
<T559E>-MOZKO = 1.
<T559E>-MOBDE = 1.
<T559E>-QTYPE = 1.

ENDLOOP.

LOOP AT IT_T559E INTO WA_T559E.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_T559E-RULNO, sy-vline,
  WA_T559E-SEQNR, sy-vline,
  WA_T559E-ENDDA, sy-vline,
  WA_T559E-BEGDA, sy-vline,
  WA_T559E-SEBEG, sy-vline,
  WA_T559E-SEEND, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_T559E 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_T559E 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_T559E INTO WA_T559E.


*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_T559E_STR, 
MANDT TYPE STRING,
MOPGK TYPE STRING,
MOZKO TYPE STRING,
MOBDE TYPE STRING,
QTYPE TYPE STRING,
RULNO TYPE STRING,
SEQNR TYPE STRING,
ENDDA TYPE STRING,
BEGDA TYPE STRING,
SEBEG TYPE STRING,
SEEND TYPE STRING,
SEUNI TYPE STRING,
AGBEG TYPE STRING,
AGEND TYPE STRING,
AGUNI TYPE STRING,
LVNUM TYPE STRING,
TTZES TYPE STRING,
TTSAL TYPE STRING,
NUPER TYPE STRING,
NFREQ TYPE STRING,
BASDT TYPE STRING,
BASRV TYPE STRING,
BASRU TYPE STRING,END OF T_EKKO_STR.
DATA: WA_T559E_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_T559E_STR-MANDT sy-vline 
WA_T559E_STR-MOPGK sy-vline 
WA_T559E_STR-MOZKO sy-vline 
WA_T559E_STR-MOBDE sy-vline 
WA_T559E_STR-QTYPE sy-vline 
WA_T559E_STR-RULNO sy-vline 
WA_T559E_STR-SEQNR sy-vline 
WA_T559E_STR-ENDDA sy-vline 
WA_T559E_STR-BEGDA sy-vline 
WA_T559E_STR-SEBEG sy-vline 
WA_T559E_STR-SEEND sy-vline 
WA_T559E_STR-SEUNI sy-vline 
WA_T559E_STR-AGBEG sy-vline 
WA_T559E_STR-AGEND sy-vline 
WA_T559E_STR-AGUNI sy-vline 
WA_T559E_STR-LVNUM sy-vline 
WA_T559E_STR-TTZES sy-vline 
WA_T559E_STR-TTSAL sy-vline 
WA_T559E_STR-NUPER sy-vline 
WA_T559E_STR-NFREQ sy-vline 
WA_T559E_STR-BASDT sy-vline 
WA_T559E_STR-BASRV sy-vline 
WA_T559E_STR-BASRU sy-vline      INTO ld_text SEPARATED BY SPACE.

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