ABAP Select data from SAP table Q554C into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP Q554C 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 Q554C. 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 Q554C 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_Q554C TYPE STANDARD TABLE OF Q554C,
      WA_Q554C TYPE Q554C,
      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: <Q554C> TYPE Q554C.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_Q554C.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM Q554C
  INTO TABLE IT_Q554C.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM Q554C
*  INTO TABLE @DATA(IT_Q554C2).
*--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_Q554C INDEX 1 INTO DATA(WA_Q554C2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_Q554C ASSIGNING <Q554C>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<Q554C>-MANDT = 1.
<Q554C>-MOLGA = 1.
<Q554C>-MODIF = 1.
<Q554C>-KLBEW = 1.
<Q554C>-OCABS = 1.

ENDLOOP.

LOOP AT IT_Q554C INTO WA_Q554C.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_Q554C-OCTXT, sy-vline,
  WA_Q554C-BEGDA, sy-vline,
  WA_Q554C-ENDDA, sy-vline,
  WA_Q554C-TEXTS, sy-vline,
  WA_Q554C-ZLKLS, sy-vline,
  WA_Q554C-CCTXT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_Q554C 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_Q554C 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_Q554C INTO WA_Q554C.


*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_Q554C_STR, 
MANDT TYPE STRING,
MOLGA TYPE STRING,
MODIF TYPE STRING,
KLBEW TYPE STRING,
OCABS TYPE STRING,
OCTXT TYPE STRING,
BEGDA TYPE STRING,
ENDDA TYPE STRING,
TEXTS TYPE STRING,
ZLKLS TYPE STRING,
CCTXT TYPE STRING,
REFND TYPE STRING,
PRCNT TYPE STRING,
DRCLS TYPE STRING,
DRCTX TYPE STRING,
WTIMS TYPE STRING,
TPCNT TYPE STRING,
UNITS TYPE STRING,
UNTXT TYPE STRING,
SPLIT TYPE STRING,
LGART TYPE STRING,
LGTXT TYPE STRING,
DRWTP TYPE STRING,
DRWTX TYPE STRING,
CYCLS TYPE STRING,
TIMES TYPE STRING,
OPERA TYPE STRING,
CTEXT TYPE STRING,
GENER TYPE STRING,END OF T_EKKO_STR.
DATA: WA_Q554C_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_Q554C_STR-MANDT sy-vline 
WA_Q554C_STR-MOLGA sy-vline 
WA_Q554C_STR-MODIF sy-vline 
WA_Q554C_STR-KLBEW sy-vline 
WA_Q554C_STR-OCABS sy-vline 
WA_Q554C_STR-OCTXT sy-vline 
WA_Q554C_STR-BEGDA sy-vline 
WA_Q554C_STR-ENDDA sy-vline 
WA_Q554C_STR-TEXTS sy-vline 
WA_Q554C_STR-ZLKLS sy-vline 
WA_Q554C_STR-CCTXT sy-vline 
WA_Q554C_STR-REFND sy-vline 
WA_Q554C_STR-PRCNT sy-vline 
WA_Q554C_STR-DRCLS sy-vline 
WA_Q554C_STR-DRCTX sy-vline 
WA_Q554C_STR-WTIMS sy-vline 
WA_Q554C_STR-TPCNT sy-vline 
WA_Q554C_STR-UNITS sy-vline 
WA_Q554C_STR-UNTXT sy-vline 
WA_Q554C_STR-SPLIT sy-vline 
WA_Q554C_STR-LGART sy-vline 
WA_Q554C_STR-LGTXT sy-vline 
WA_Q554C_STR-DRWTP sy-vline 
WA_Q554C_STR-DRWTX sy-vline 
WA_Q554C_STR-CYCLS sy-vline 
WA_Q554C_STR-TIMES sy-vline 
WA_Q554C_STR-OPERA sy-vline 
WA_Q554C_STR-CTEXT sy-vline 
WA_Q554C_STR-GENER sy-vline      INTO ld_text SEPARATED BY SPACE.

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