ABAP Select data from SAP table TQSS1_AVE into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP TQSS1_AVE 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 TQSS1_AVE. 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 TQSS1_AVE 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_TQSS1_AVE TYPE STANDARD TABLE OF TQSS1_AVE,
      WA_TQSS1_AVE TYPE TQSS1_AVE,
      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: <TQSS1_AVE> TYPE TQSS1_AVE.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_TQSS1_AVE.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM TQSS1_AVE
  INTO TABLE IT_TQSS1_AVE.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TQSS1_AVE
*  INTO TABLE @DATA(IT_TQSS1_AVE2).
*--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_TQSS1_AVE INDEX 1 INTO DATA(WA_TQSS1_AVE2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_TQSS1_AVE ASSIGNING <TQSS1_AVE>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TQSS1_AVE>-MANDT = 1.
<TQSS1_AVE>-WERK = 1.
<TQSS1_AVE>-QPART = 1.
<TQSS1_AVE>-AUCHLZMK = 1.
<TQSS1_AVE>-VE_AUSWAHLMGE = 1.

ENDLOOP.

LOOP AT IT_TQSS1_AVE INTO WA_TQSS1_AVE.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TQSS1_AVE-VE_AUSWAHLMGETLOS, sy-vline,
  WA_TQSS1_AVE-VE_WERK, sy-vline,
  WA_TQSS1_AVE-VE_CODEGRUPPE, sy-vline,
  WA_TQSS1_AVE-VE_CODE, sy-vline,
  WA_TQSS1_AVE-CODEGR_UD_SKIP, sy-vline,
  WA_TQSS1_AVE-CODE_UD_SKIP, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TQSS1_AVE 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_TQSS1_AVE 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_TQSS1_AVE INTO WA_TQSS1_AVE.


*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_TQSS1_AVE_STR, 
MANDT TYPE STRING,
WERK TYPE STRING,
QPART TYPE STRING,
AUCHLZMK TYPE STRING,
VE_AUSWAHLMGE TYPE STRING,
VE_AUSWAHLMGETLOS TYPE STRING,
VE_WERK TYPE STRING,
VE_CODEGRUPPE TYPE STRING,
VE_CODE TYPE STRING,
CODEGR_UD_SKIP TYPE STRING,
CODE_UD_SKIP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TQSS1_AVE_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_TQSS1_AVE_STR-MANDT sy-vline 
WA_TQSS1_AVE_STR-WERK sy-vline 
WA_TQSS1_AVE_STR-QPART sy-vline 
WA_TQSS1_AVE_STR-AUCHLZMK sy-vline 
WA_TQSS1_AVE_STR-VE_AUSWAHLMGE sy-vline 
WA_TQSS1_AVE_STR-VE_AUSWAHLMGETLOS sy-vline 
WA_TQSS1_AVE_STR-VE_WERK sy-vline 
WA_TQSS1_AVE_STR-VE_CODEGRUPPE sy-vline 
WA_TQSS1_AVE_STR-VE_CODE sy-vline 
WA_TQSS1_AVE_STR-CODEGR_UD_SKIP sy-vline 
WA_TQSS1_AVE_STR-CODE_UD_SKIP sy-vline      INTO ld_text SEPARATED BY SPACE.

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