ABAP Select data from SAP table AQDBRH into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM AQDBRH
*  INTO TABLE @DATA(IT_AQDBRH2).
*--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_AQDBRH INDEX 1 INTO DATA(WA_AQDBRH2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<AQDBRH>-NUM = 1.
<AQDBRH>-OCCU = 1.
<AQDBRH>-SGNA = 1.
<AQDBRH>-TINDX = 1.
<AQDBRH>-NOHEAD = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_AQDBRH-GRAFIKTYP, sy-vline,
  WA_AQDBRH-GRAFIKSIZE, sy-vline,
  WA_AQDBRH-GRAFIKCOL, sy-vline,
  WA_AQDBRH-GRAFIKTEXT, sy-vline,
  WA_AQDBRH-GRAFIKDYN, sy-vline,
  WA_AQDBRH-LSORT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_AQDBRH 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_AQDBRH 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_AQDBRH INTO WA_AQDBRH.


*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_AQDBRH_STR, 
NUM TYPE STRING,
OCCU TYPE STRING,
SGNA TYPE STRING,
TINDX TYPE STRING,
NOHEAD TYPE STRING,
GRAFIKTYP TYPE STRING,
GRAFIKSIZE TYPE STRING,
GRAFIKCOL TYPE STRING,
GRAFIKTEXT TYPE STRING,
GRAFIKDYN TYPE STRING,
LSORT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_AQDBRH_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_AQDBRH_STR-NUM sy-vline 
WA_AQDBRH_STR-OCCU sy-vline 
WA_AQDBRH_STR-SGNA sy-vline 
WA_AQDBRH_STR-TINDX sy-vline 
WA_AQDBRH_STR-NOHEAD sy-vline 
WA_AQDBRH_STR-GRAFIKTYP sy-vline 
WA_AQDBRH_STR-GRAFIKSIZE sy-vline 
WA_AQDBRH_STR-GRAFIKCOL sy-vline 
WA_AQDBRH_STR-GRAFIKTEXT sy-vline 
WA_AQDBRH_STR-GRAFIKDYN sy-vline 
WA_AQDBRH_STR-LSORT sy-vline      INTO ld_text SEPARATED BY SPACE.

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