ABAP Select data from SAP table T554S into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP T554S 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 T554S. 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 T554S 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_T554S TYPE STANDARD TABLE OF T554S,
      WA_T554S TYPE T554S,
      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: <T554S> TYPE T554S.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_T554S.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM T554S
  INTO TABLE IT_T554S.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM T554S
*  INTO TABLE @DATA(IT_T554S2).
*--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_T554S INDEX 1 INTO DATA(WA_T554S2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_T554S ASSIGNING <T554S>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<T554S>-MANDT = 1.
<T554S>-MOABW = 1.
<T554S>-SUBTY = 1.
<T554S>-ENDDA = 1.
<T554S>-BEGDA = 1.

ENDLOOP.

LOOP AT IT_T554S INTO WA_T554S.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_T554S-D2OBL, sy-vline,
  WA_T554S-REABF, sy-vline,
  WA_T554S-REAEF, sy-vline,
  WA_T554S-REAZF, sy-vline,
  WA_T554S-MINTG, sy-vline,
  WA_T554S-MAXTG, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_T554S 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_T554S 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_T554S INTO WA_T554S.


*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_T554S_STR, 
MANDT TYPE STRING,
MOABW TYPE STRING,
SUBTY TYPE STRING,
ENDDA TYPE STRING,
BEGDA TYPE STRING,
D2OBL TYPE STRING,
REABF TYPE STRING,
REAEF TYPE STRING,
REAZF TYPE STRING,
MINTG TYPE STRING,
MAXTG TYPE STRING,
KLZBI TYPE STRING,
KLBEW TYPE STRING,
ABSTP TYPE STRING,
ABKLA TYPE STRING,
DUEVO TYPE STRING,
DYNNR TYPE STRING,
KTART TYPE STRING,
RGMOD TYPE STRING,
KLBDE TYPE STRING,
KUNBZ TYPE STRING,
ERGAB TYPE STRING,
PCOPT TYPE STRING,
STKRV TYPE STRING,
STUND TYPE STRING,
ART01 TYPE STRING,
URMAN TYPE STRING,
ABWRG TYPE STRING,
ABSTY TYPE STRING,
VBLAK TYPE STRING,
ABKND TYPE STRING,
CLTIM TYPE STRING,
MUNIT TYPE STRING,
CRULE TYPE STRING,
DEDQU TYPE STRING,
AVAIL TYPE STRING,
ENDCK TYPE STRING,
LVCUT TYPE STRING,
LVMIN TYPE STRING,
LVMAX TYPE STRING,
DEDOUTINT TYPE STRING,
ACCNT TYPE STRING,
ABSTYP_SHARED_CE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_T554S_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_T554S_STR-MANDT sy-vline 
WA_T554S_STR-MOABW sy-vline 
WA_T554S_STR-SUBTY sy-vline 
WA_T554S_STR-ENDDA sy-vline 
WA_T554S_STR-BEGDA sy-vline 
WA_T554S_STR-D2OBL sy-vline 
WA_T554S_STR-REABF sy-vline 
WA_T554S_STR-REAEF sy-vline 
WA_T554S_STR-REAZF sy-vline 
WA_T554S_STR-MINTG sy-vline 
WA_T554S_STR-MAXTG sy-vline 
WA_T554S_STR-KLZBI sy-vline 
WA_T554S_STR-KLBEW sy-vline 
WA_T554S_STR-ABSTP sy-vline 
WA_T554S_STR-ABKLA sy-vline 
WA_T554S_STR-DUEVO sy-vline 
WA_T554S_STR-DYNNR sy-vline 
WA_T554S_STR-KTART sy-vline 
WA_T554S_STR-RGMOD sy-vline 
WA_T554S_STR-KLBDE sy-vline 
WA_T554S_STR-KUNBZ sy-vline 
WA_T554S_STR-ERGAB sy-vline 
WA_T554S_STR-PCOPT sy-vline 
WA_T554S_STR-STKRV sy-vline 
WA_T554S_STR-STUND sy-vline 
WA_T554S_STR-ART01 sy-vline 
WA_T554S_STR-URMAN sy-vline 
WA_T554S_STR-ABWRG sy-vline 
WA_T554S_STR-ABSTY sy-vline 
WA_T554S_STR-VBLAK sy-vline 
WA_T554S_STR-ABKND sy-vline 
WA_T554S_STR-CLTIM sy-vline 
WA_T554S_STR-MUNIT sy-vline 
WA_T554S_STR-CRULE sy-vline 
WA_T554S_STR-DEDQU sy-vline 
WA_T554S_STR-AVAIL sy-vline 
WA_T554S_STR-ENDCK sy-vline 
WA_T554S_STR-LVCUT sy-vline 
WA_T554S_STR-LVMIN sy-vline 
WA_T554S_STR-LVMAX sy-vline 
WA_T554S_STR-DEDOUTINT sy-vline 
WA_T554S_STR-ACCNT sy-vline 
WA_T554S_STR-ABSTYP_SHARED_CE sy-vline      INTO ld_text SEPARATED BY SPACE.

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