ABAP Select data from SAP table AQQ_S_TAB into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM AQQ_S_TAB
*  INTO TABLE @DATA(IT_AQQ_S_TAB2).
*--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_AQQ_S_TAB INDEX 1 INTO DATA(WA_AQQ_S_TAB2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<AQQ_S_TAB>-SFLG = 1.
<AQQ_S_TAB>-IND = 1.
<AQQ_S_TAB>-POS = 1.
<AQQ_S_TAB>-FELD = 1.
<AQQ_S_TAB>-FTEXT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_AQQ_S_TAB-KEY, sy-vline,
  WA_AQQ_S_TAB-ITYPE, sy-vline,
  WA_AQQ_S_TAB-ILENG, sy-vline,
  WA_AQQ_S_TAB-DOM, sy-vline,
  WA_AQQ_S_TAB-DTYPE, sy-vline,
  WA_AQQ_S_TAB-DLENG, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_AQQ_S_TAB 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_AQQ_S_TAB 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_AQQ_S_TAB INTO WA_AQQ_S_TAB.


*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 DTYPE, internal->external for field DTYPE
CALL FUNCTION 'CONVERSION_EXIT_DTYPE_OUTPUT'
  EXPORTING
    input =                      WA_AQQ_S_TAB-DTYPE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_AQQ_S_TAB-DTYPE.
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_AQQ_S_TAB_STR, 
SFLG TYPE STRING,
IND TYPE STRING,
POS TYPE STRING,
FELD TYPE STRING,
FTEXT TYPE STRING,
KEY TYPE STRING,
ITYPE TYPE STRING,
ILENG TYPE STRING,
DOM TYPE STRING,
DTYPE TYPE STRING,
DLENG TYPE STRING,
DOUTL TYPE STRING,
DDEC TYPE STRING,END OF T_EKKO_STR.
DATA: WA_AQQ_S_TAB_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_AQQ_S_TAB_STR-SFLG sy-vline 
WA_AQQ_S_TAB_STR-IND sy-vline 
WA_AQQ_S_TAB_STR-POS sy-vline 
WA_AQQ_S_TAB_STR-FELD sy-vline 
WA_AQQ_S_TAB_STR-FTEXT sy-vline 
WA_AQQ_S_TAB_STR-KEY sy-vline 
WA_AQQ_S_TAB_STR-ITYPE sy-vline 
WA_AQQ_S_TAB_STR-ILENG sy-vline 
WA_AQQ_S_TAB_STR-DOM sy-vline 
WA_AQQ_S_TAB_STR-DTYPE sy-vline 
WA_AQQ_S_TAB_STR-DLENG sy-vline 
WA_AQQ_S_TAB_STR-DOUTL sy-vline 
WA_AQQ_S_TAB_STR-DDEC sy-vline      INTO ld_text SEPARATED BY SPACE.

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