ABAP Select data from SAP table Q0442 into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

Below is a number of ABAP code snippets to demonstrate how to select data from SAP Q0442 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 Q0442. 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 Q0442 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_Q0442 TYPE STANDARD TABLE OF Q0442,
      WA_Q0442 TYPE Q0442,
      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: <Q0442> TYPE Q0442.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_Q0442.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM Q0442
  INTO TABLE IT_Q0442.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM Q0442
*  INTO TABLE @DATA(IT_Q04422).
*--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_Q0442 INDEX 1 INTO DATA(WA_Q04422).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_Q0442 ASSIGNING <Q0442>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<Q0442>-EGTXT = 1.
<Q0442>-FTEXT = 1.
<Q0442>-MTEXT = 1.
<Q0442>-DSCNT = 1.
<Q0442>-CRNCY = 1.

ENDLOOP.

LOOP AT IT_Q0442 INTO WA_Q0442.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_Q0442-RETXT, sy-vline,
  WA_Q0442-PKWTX, sy-vline,
  WA_Q0442-MNTTX, sy-vline,
  WA_Q0442-MODTX, sy-vline,
  WA_Q0442-BNFTV, sy-vline,
  WA_Q0442-CO2EM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_Q0442 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_Q0442 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_Q0442 INTO WA_Q0442.


*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_Q0442_STR, 
EGTXT TYPE STRING,
FTEXT TYPE STRING,
MTEXT TYPE STRING,
DSCNT TYPE STRING,
CRNCY TYPE STRING,
RETXT TYPE STRING,
PKWTX TYPE STRING,
MNTTX TYPE STRING,
MODTX TYPE STRING,
BNFTV TYPE STRING,
CO2EM TYPE STRING,
CUBIC TYPE STRING,
TTYDP TYPE STRING,
TDTXT TYPE STRING,
REGPD TYPE STRING,
PERTX TYPE STRING,
PCTXT TYPE STRING,
LCTXT TYPE STRING,
LOTXT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_Q0442_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_Q0442_STR-EGTXT sy-vline 
WA_Q0442_STR-FTEXT sy-vline 
WA_Q0442_STR-MTEXT sy-vline 
WA_Q0442_STR-DSCNT sy-vline 
WA_Q0442_STR-CRNCY sy-vline 
WA_Q0442_STR-RETXT sy-vline 
WA_Q0442_STR-PKWTX sy-vline 
WA_Q0442_STR-MNTTX sy-vline 
WA_Q0442_STR-MODTX sy-vline 
WA_Q0442_STR-BNFTV sy-vline 
WA_Q0442_STR-CO2EM sy-vline 
WA_Q0442_STR-CUBIC sy-vline 
WA_Q0442_STR-TTYDP sy-vline 
WA_Q0442_STR-TDTXT sy-vline 
WA_Q0442_STR-REGPD sy-vline 
WA_Q0442_STR-PERTX sy-vline 
WA_Q0442_STR-PCTXT sy-vline 
WA_Q0442_STR-LCTXT sy-vline 
WA_Q0442_STR-LOTXT sy-vline      INTO ld_text SEPARATED BY SPACE.

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