ABAP Select data from SAP table TQSS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TQSS
*  INTO TABLE @DATA(IT_TQSS2).
*--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_TQSS INDEX 1 INTO DATA(WA_TQSS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TQSS>-MANDT = 1.
<TQSS>-HISTGRUPPE = 1.
<TQSS>-KENNZAHLOB = 1.
<TQSS>-KENNZAHLUN = 1.
<TQSS>-KZMERKZENT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TQSS-KZMETHZENT, sy-vline,
  WA_TQSS-KZMERKALE, sy-vline,
  WA_TQSS-KZMETHALE, sy-vline,
  WA_TQSS-KZCDGRPALE, sy-vline,
  WA_TQSS-UNPLMK, sy-vline,
  WA_TQSS-QKZMIN, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TQSS 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_TQSS 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_TQSS INTO WA_TQSS.


*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_TQSS_STR, 
MANDT TYPE STRING,
HISTGRUPPE TYPE STRING,
KENNZAHLOB TYPE STRING,
KENNZAHLUN TYPE STRING,
KZMERKZENT TYPE STRING,
KZMETHZENT TYPE STRING,
KZMERKALE TYPE STRING,
KZMETHALE TYPE STRING,
KZCDGRPALE TYPE STRING,
UNPLMK TYPE STRING,
QKZMIN TYPE STRING,
FBNAMEVE TYPE STRING,
MATSPEZ TYPE STRING,
QMCAPID TYPE STRING,
MS_FLAG TYPE STRING,
CP_FLAG TYPE STRING,
RFCDEST_CPRO TYPE STRING,
SWITCHES TYPE STRING,
RFCDEST_GATEWAY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TQSS_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_TQSS_STR-MANDT sy-vline 
WA_TQSS_STR-HISTGRUPPE sy-vline 
WA_TQSS_STR-KENNZAHLOB sy-vline 
WA_TQSS_STR-KENNZAHLUN sy-vline 
WA_TQSS_STR-KZMERKZENT sy-vline 
WA_TQSS_STR-KZMETHZENT sy-vline 
WA_TQSS_STR-KZMERKALE sy-vline 
WA_TQSS_STR-KZMETHALE sy-vline 
WA_TQSS_STR-KZCDGRPALE sy-vline 
WA_TQSS_STR-UNPLMK sy-vline 
WA_TQSS_STR-QKZMIN sy-vline 
WA_TQSS_STR-FBNAMEVE sy-vline 
WA_TQSS_STR-MATSPEZ sy-vline 
WA_TQSS_STR-QMCAPID sy-vline 
WA_TQSS_STR-MS_FLAG sy-vline 
WA_TQSS_STR-CP_FLAG sy-vline 
WA_TQSS_STR-RFCDEST_CPRO sy-vline 
WA_TQSS_STR-SWITCHES sy-vline 
WA_TQSS_STR-RFCDEST_GATEWAY sy-vline      INTO ld_text SEPARATED BY SPACE.

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