ABAP Select data from SAP table AQHDQU into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM AQHDQU
*  INTO TABLE @DATA(IT_AQHDQU2).
*--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_AQHDQU INDEX 1 INTO DATA(WA_AQHDQU2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<AQHDQU>-TINDXT = 1.
<AQHDQU>-TINDX1 = 1.
<AQHDQU>-TINDX2 = 1.
<AQHDQU>-TINDX3 = 1.
<AQHDQU>-LINCT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_AQHDQU-LINSZ, sy-vline,
  WA_AQHDQU-PAGENUM, sy-vline,
  WA_AQHDQU-LINSZTAB, sy-vline,
  WA_AQHDQU-TITEL, sy-vline,
  WA_AQHDQU-LEFTM, sy-vline,
  WA_AQHDQU-LOCK, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_AQHDQU 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_AQHDQU 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_AQHDQU INTO WA_AQHDQU.


*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_AQHDQU_STR, 
TINDXT TYPE STRING,
TINDX1 TYPE STRING,
TINDX2 TYPE STRING,
TINDX3 TYPE STRING,
LINCT TYPE STRING,
LINSZ TYPE STRING,
PAGENUM TYPE STRING,
LINSZTAB TYPE STRING,
TITEL TYPE STRING,
LEFTM TYPE STRING,
LOCK TYPE STRING,
QUVARIANT TYPE STRING,
SSET TYPE STRING,
NOZOPT TYPE STRING,
DIACT TYPE STRING,
UPDFLAG TYPE STRING,
REPID TYPE STRING,
CLAS TYPE STRING,
ART TYPE STRING,
LOGDB TYPE STRING,
TSTRUC TYPE STRING,
FRAME TYPE STRING,
COLSEP TYPE STRING,
TOTAL TYPE STRING,
GRAFIKTYP TYPE STRING,
GRAFIKSIZE TYPE STRING,
GRAFIKCOL TYPE STRING,
GRAFIKTEXT TYPE STRING,
GRAFIKDYN TYPE STRING,
LSORT TYPE STRING,
QUCNAM TYPE STRING,
QUCDAT TYPE STRING,
QUUNAM TYPE STRING,
QUUDAT TYPE STRING,
QUUTIM TYPE STRING,
QREL TYPE STRING,
QSYSTYPE TYPE STRING,
QSYSID TYPE STRING,
DEVC TYPE STRING,
LINSZ_BL TYPE STRING,
JOINSIM TYPE STRING,
PAINTER TYPE STRING,
API TYPE STRING,
NEWLOCF TYPE STRING,
OLDSTRUC TYPE STRING,
NO_MEMID TYPE STRING,
ALVCOUNT TYPE STRING,
FLAT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_AQHDQU_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_AQHDQU_STR-TINDXT sy-vline 
WA_AQHDQU_STR-TINDX1 sy-vline 
WA_AQHDQU_STR-TINDX2 sy-vline 
WA_AQHDQU_STR-TINDX3 sy-vline 
WA_AQHDQU_STR-LINCT sy-vline 
WA_AQHDQU_STR-LINSZ sy-vline 
WA_AQHDQU_STR-PAGENUM sy-vline 
WA_AQHDQU_STR-LINSZTAB sy-vline 
WA_AQHDQU_STR-TITEL sy-vline 
WA_AQHDQU_STR-LEFTM sy-vline 
WA_AQHDQU_STR-LOCK sy-vline 
WA_AQHDQU_STR-QUVARIANT sy-vline 
WA_AQHDQU_STR-SSET sy-vline 
WA_AQHDQU_STR-NOZOPT sy-vline 
WA_AQHDQU_STR-DIACT sy-vline 
WA_AQHDQU_STR-UPDFLAG sy-vline 
WA_AQHDQU_STR-REPID sy-vline 
WA_AQHDQU_STR-CLAS sy-vline 
WA_AQHDQU_STR-ART sy-vline 
WA_AQHDQU_STR-LOGDB sy-vline 
WA_AQHDQU_STR-TSTRUC sy-vline 
WA_AQHDQU_STR-FRAME sy-vline 
WA_AQHDQU_STR-COLSEP sy-vline 
WA_AQHDQU_STR-TOTAL sy-vline 
WA_AQHDQU_STR-GRAFIKTYP sy-vline 
WA_AQHDQU_STR-GRAFIKSIZE sy-vline 
WA_AQHDQU_STR-GRAFIKCOL sy-vline 
WA_AQHDQU_STR-GRAFIKTEXT sy-vline 
WA_AQHDQU_STR-GRAFIKDYN sy-vline 
WA_AQHDQU_STR-LSORT sy-vline 
WA_AQHDQU_STR-QUCNAM sy-vline 
WA_AQHDQU_STR-QUCDAT sy-vline 
WA_AQHDQU_STR-QUUNAM sy-vline 
WA_AQHDQU_STR-QUUDAT sy-vline 
WA_AQHDQU_STR-QUUTIM sy-vline 
WA_AQHDQU_STR-QREL sy-vline 
WA_AQHDQU_STR-QSYSTYPE sy-vline 
WA_AQHDQU_STR-QSYSID sy-vline 
WA_AQHDQU_STR-DEVC sy-vline 
WA_AQHDQU_STR-LINSZ_BL sy-vline 
WA_AQHDQU_STR-JOINSIM sy-vline 
WA_AQHDQU_STR-PAINTER sy-vline 
WA_AQHDQU_STR-API sy-vline 
WA_AQHDQU_STR-NEWLOCF sy-vline 
WA_AQHDQU_STR-OLDSTRUC sy-vline 
WA_AQHDQU_STR-NO_MEMID sy-vline 
WA_AQHDQU_STR-ALVCOUNT sy-vline 
WA_AQHDQU_STR-FLAT sy-vline      INTO ld_text SEPARATED BY SPACE.

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