ABAP Select data from SAP table Q0002 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP Q0002 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 Q0002. 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 Q0002 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_Q0002 TYPE STANDARD TABLE OF Q0002,
      WA_Q0002 TYPE Q0002,
      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: <Q0002> TYPE Q0002.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_Q0002.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM Q0002
  INTO TABLE IT_Q0002.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM Q0002
*  INTO TABLE @DATA(IT_Q00022).
*--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_Q0002 INDEX 1 INTO DATA(WA_Q00022).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_Q0002 ASSIGNING <Q0002>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<Q0002>-ANREX = 1.
<Q0002>-FATXT = 1.
<Q0002>-KITXT = 1.
<Q0002>-NATTX = 1.
<Q0002>-NA2TX = 1.

ENDLOOP.

LOOP AT IT_Q0002 INTO WA_Q0002.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_Q0002-NA3TX, sy-vline,
  WA_Q0002-LANDX, sy-vline,
  WA_Q0002-GBPAS, sy-vline,
  WA_Q0002-GBDAT, sy-vline,
  WA_Q0002-GESCH, sy-vline,
  WA_Q0002-ENAME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_Q0002 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_Q0002 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_Q0002 INTO WA_Q0002.


*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.

*Conversion exit PDATE, internal->external for field GBDAT
CALL FUNCTION 'CONVERSION_EXIT_PDATE_OUTPUT'
  EXPORTING
    input =                      WA_Q0002-GBDAT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_Q0002-GBDAT.
WRITE:/ 'New Value:', ld_input.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_Q0002_STR, 
ANREX TYPE STRING,
FATXT TYPE STRING,
KITXT TYPE STRING,
NATTX TYPE STRING,
NA2TX TYPE STRING,
NA3TX TYPE STRING,
LANDX TYPE STRING,
GBPAS TYPE STRING,
GBDAT TYPE STRING,
GESCH TYPE STRING,
ENAME TYPE STRING,
PERID TYPE STRING,
GESC1 TYPE STRING,
GESC2 TYPE STRING,
GESC3 TYPE STRING,
BMPTR TYPE STRING,
FNAME TYPE STRING,
CURP TYPE STRING,
CCUIL TYPE STRING,
ID_TYPE TYPE STRING,
BLTYP TYPE STRING,
AGE TYPE STRING,
PEREG TYPE STRING,
NUMSS TYPE STRING,
CLESS TYPE STRING,
BSNCD TYPE STRING,
POINT TYPE STRING,
INSTY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_Q0002_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_Q0002_STR-ANREX sy-vline 
WA_Q0002_STR-FATXT sy-vline 
WA_Q0002_STR-KITXT sy-vline 
WA_Q0002_STR-NATTX sy-vline 
WA_Q0002_STR-NA2TX sy-vline 
WA_Q0002_STR-NA3TX sy-vline 
WA_Q0002_STR-LANDX sy-vline 
WA_Q0002_STR-GBPAS sy-vline 
WA_Q0002_STR-GBDAT sy-vline 
WA_Q0002_STR-GESCH sy-vline 
WA_Q0002_STR-ENAME sy-vline 
WA_Q0002_STR-PERID sy-vline 
WA_Q0002_STR-GESC1 sy-vline 
WA_Q0002_STR-GESC2 sy-vline 
WA_Q0002_STR-GESC3 sy-vline 
WA_Q0002_STR-BMPTR sy-vline 
WA_Q0002_STR-FNAME sy-vline 
WA_Q0002_STR-CURP sy-vline 
WA_Q0002_STR-CCUIL sy-vline 
WA_Q0002_STR-ID_TYPE sy-vline 
WA_Q0002_STR-BLTYP sy-vline 
WA_Q0002_STR-AGE sy-vline 
WA_Q0002_STR-PEREG sy-vline 
WA_Q0002_STR-NUMSS sy-vline 
WA_Q0002_STR-CLESS sy-vline 
WA_Q0002_STR-BSNCD sy-vline 
WA_Q0002_STR-POINT sy-vline 
WA_Q0002_STR-INSTY sy-vline      INTO ld_text SEPARATED BY SPACE.

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