ABAP Select data from SAP table Q0255 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP Q0255 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 Q0255. 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 Q0255 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_Q0255 TYPE STANDARD TABLE OF Q0255,
      WA_Q0255 TYPE Q0255,
      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: <Q0255> TYPE Q0255.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_Q0255.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM Q0255
  INTO TABLE IT_Q0255.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM Q0255
*  INTO TABLE @DATA(IT_Q02552).
*--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_Q0255 INDEX 1 INTO DATA(WA_Q02552).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_Q0255 ASSIGNING <Q0255>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<Q0255>-OCCCD = 1.
<Q0255>-JNFLD = 1.
<Q0255>-OCCDT = 1.
<Q0255>-OCCTM = 1.
<Q0255>-VALDT = 1.

ENDLOOP.

LOOP AT IT_Q0255 INTO WA_Q0255.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_Q0255-REMAR, sy-vline,
  WA_Q0255-OTEXT, sy-vline,
  WA_Q0255-PAGEF, sy-vline,
  WA_Q0255-PAGET, sy-vline,
  WA_Q0255-BTEXT, sy-vline,
  WA_Q0255-REMCD, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_Q0255 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_Q0255 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_Q0255 INTO WA_Q0255.


*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_Q0255_STR, 
OCCCD TYPE STRING,
JNFLD TYPE STRING,
OCCDT TYPE STRING,
OCCTM TYPE STRING,
VALDT TYPE STRING,
REMAR TYPE STRING,
OTEXT TYPE STRING,
PAGEF TYPE STRING,
PAGET TYPE STRING,
BTEXT TYPE STRING,
REMCD TYPE STRING,
JMPWC TYPE STRING,
DATWC TYPE STRING,
CHOI1 TYPE STRING,
CHOI2 TYPE STRING,
CHOI3 TYPE STRING,
CTXT1 TYPE STRING,
CTXT2 TYPE STRING,
CTXT3 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_Q0255_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_Q0255_STR-OCCCD sy-vline 
WA_Q0255_STR-JNFLD sy-vline 
WA_Q0255_STR-OCCDT sy-vline 
WA_Q0255_STR-OCCTM sy-vline 
WA_Q0255_STR-VALDT sy-vline 
WA_Q0255_STR-REMAR sy-vline 
WA_Q0255_STR-OTEXT sy-vline 
WA_Q0255_STR-PAGEF sy-vline 
WA_Q0255_STR-PAGET sy-vline 
WA_Q0255_STR-BTEXT sy-vline 
WA_Q0255_STR-REMCD sy-vline 
WA_Q0255_STR-JMPWC sy-vline 
WA_Q0255_STR-DATWC sy-vline 
WA_Q0255_STR-CHOI1 sy-vline 
WA_Q0255_STR-CHOI2 sy-vline 
WA_Q0255_STR-CHOI3 sy-vline 
WA_Q0255_STR-CTXT1 sy-vline 
WA_Q0255_STR-CTXT2 sy-vline 
WA_Q0255_STR-CTXT3 sy-vline      INTO ld_text SEPARATED BY SPACE.

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