ABAP Select data from SAP table Q0002AE into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP Q0002AE 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 Q0002AE. 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 Q0002AE 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_Q0002AE TYPE STANDARD TABLE OF Q0002AE,
      WA_Q0002AE TYPE Q0002AE,
      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: <Q0002AE> TYPE Q0002AE.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_Q0002AE.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM Q0002AE
  INTO TABLE IT_Q0002AE.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM Q0002AE
*  INTO TABLE @DATA(IT_Q0002AE2).
*--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_Q0002AE INDEX 1 INTO DATA(WA_Q0002AE2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_Q0002AE ASSIGNING <Q0002AE>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<Q0002AE>-LNAMR = 1.
<Q0002AE>-NABIR = 1.
<Q0002AE>-NICKR = 1.
<Q0002AE>-FNAMR = 1.
<Q0002AE>-RUFNM = 1.

ENDLOOP.

LOOP AT IT_Q0002AE INTO WA_Q0002AE.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_Q0002AE-VORNA, sy-vline,
  WA_Q0002AE-NACH2, sy-vline,
  WA_Q0002AE-MIDNM, sy-vline,
  WA_Q0002AE-NACHN, sy-vline,
  WA_Q0002AE-GESCH, sy-vline,
ENDLOOP.
   
*Add any further fields from structure WA_Q0002AE 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_Q0002AE 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_Q0002AE INTO WA_Q0002AE.


*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_Q0002AE_STR, 
LNAMR TYPE STRING,
NABIR TYPE STRING,
NICKR TYPE STRING,
FNAMR TYPE STRING,
RUFNM TYPE STRING,
VORNA TYPE STRING,
NACH2 TYPE STRING,
MIDNM TYPE STRING,
NACHN TYPE STRING,
GESCH TYPE STRING,END OF T_EKKO_STR.
DATA: WA_Q0002AE_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_Q0002AE_STR-LNAMR sy-vline 
WA_Q0002AE_STR-NABIR sy-vline 
WA_Q0002AE_STR-NICKR sy-vline 
WA_Q0002AE_STR-FNAMR sy-vline 
WA_Q0002AE_STR-RUFNM sy-vline 
WA_Q0002AE_STR-VORNA sy-vline 
WA_Q0002AE_STR-NACH2 sy-vline 
WA_Q0002AE_STR-MIDNM sy-vline 
WA_Q0002AE_STR-NACHN sy-vline 
WA_Q0002AE_STR-GESCH sy-vline      INTO ld_text SEPARATED BY SPACE.

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