ABAP Select data from SAP table AQDBGR into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM AQDBGR
*  INTO TABLE @DATA(IT_AQDBGR2).
*--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_AQDBGR INDEX 1 INTO DATA(WA_AQDBGR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<AQDBGR>-SGNA = 1.
<AQDBGR>-NAME = 1.
<AQDBGR>-SORT = 1.
<AQDBGR>-DESCENDING = 1.
<AQDBGR>-TEXT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_AQDBGR-TINDXG, sy-vline,
  WA_AQDBGR-TOTAL, sy-vline,
  WA_AQDBGR-TINDXS, sy-vline,
  WA_AQDBGR-CNT, sy-vline,
  WA_AQDBGR-TINDXC, sy-vline,
  WA_AQDBGR-SKIP, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_AQDBGR 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_AQDBGR 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_AQDBGR INTO WA_AQDBGR.


*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_AQDBGR_STR, 
SGNA TYPE STRING,
NAME TYPE STRING,
SORT TYPE STRING,
DESCENDING TYPE STRING,
TEXT TYPE STRING,
TINDXG TYPE STRING,
TOTAL TYPE STRING,
TINDXS TYPE STRING,
CNT TYPE STRING,
TINDXC TYPE STRING,
SKIP TYPE STRING,
NEWPAGE TYPE STRING,
FRAME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_AQDBGR_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_AQDBGR_STR-SGNA sy-vline 
WA_AQDBGR_STR-NAME sy-vline 
WA_AQDBGR_STR-SORT sy-vline 
WA_AQDBGR_STR-DESCENDING sy-vline 
WA_AQDBGR_STR-TEXT sy-vline 
WA_AQDBGR_STR-TINDXG sy-vline 
WA_AQDBGR_STR-TOTAL sy-vline 
WA_AQDBGR_STR-TINDXS sy-vline 
WA_AQDBGR_STR-CNT sy-vline 
WA_AQDBGR_STR-TINDXC sy-vline 
WA_AQDBGR_STR-SKIP sy-vline 
WA_AQDBGR_STR-NEWPAGE sy-vline 
WA_AQDBGR_STR-FRAME sy-vline      INTO ld_text SEPARATED BY SPACE.

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