ABAP Select data from SAP table MTQSS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MTQSS
*  INTO TABLE @DATA(IT_MTQSS2).
*--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_MTQSS INDEX 1 INTO DATA(WA_MTQSS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MTQSS>-MTART = 1.
<MTQSS>-MBRSH = 1.
<MTQSS>-MEINS = 1.
<MTQSS>-MAKTX = 1.
<MTQSS>-QMPUR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MTQSS-AUSME, sy-vline,
  WA_MTQSS-INSMK, sy-vline,
  WA_MTQSS-SSQSS, sy-vline,
  WA_MTQSS-QZGTP, sy-vline,
  WA_MTQSS-WEBAZ, sy-vline,
  WA_MTQSS-MMSTA, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MTQSS 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_MTQSS 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_MTQSS INTO WA_MTQSS.


*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 CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_MTQSS-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MTQSS-MEINS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field AUSME
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_MTQSS-AUSME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MTQSS-AUSME.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field BSTME
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_MTQSS-BSTME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MTQSS-BSTME.
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_MTQSS_STR, 
MTART TYPE STRING,
MBRSH TYPE STRING,
MEINS TYPE STRING,
MAKTX TYPE STRING,
QMPUR TYPE STRING,
AUSME TYPE STRING,
INSMK TYPE STRING,
SSQSS TYPE STRING,
QZGTP TYPE STRING,
WEBAZ TYPE STRING,
MMSTA TYPE STRING,
KZDKZ TYPE STRING,
QMATV TYPE STRING,
BSTME TYPE STRING,
UMREZ TYPE STRING,
UMREN TYPE STRING,
KZREV TYPE STRING,
RBNRM TYPE STRING,
QMATA TYPE STRING,
XCHPF TYPE STRING,
MPROF TYPE STRING,
SERNP TYPE STRING,
XGCHP TYPE STRING,
KZKRI TYPE STRING,
MATKL TYPE STRING,
PRDHA TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MTQSS_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_MTQSS_STR-MTART sy-vline 
WA_MTQSS_STR-MBRSH sy-vline 
WA_MTQSS_STR-MEINS sy-vline 
WA_MTQSS_STR-MAKTX sy-vline 
WA_MTQSS_STR-QMPUR sy-vline 
WA_MTQSS_STR-AUSME sy-vline 
WA_MTQSS_STR-INSMK sy-vline 
WA_MTQSS_STR-SSQSS sy-vline 
WA_MTQSS_STR-QZGTP sy-vline 
WA_MTQSS_STR-WEBAZ sy-vline 
WA_MTQSS_STR-MMSTA sy-vline 
WA_MTQSS_STR-KZDKZ sy-vline 
WA_MTQSS_STR-QMATV sy-vline 
WA_MTQSS_STR-BSTME sy-vline 
WA_MTQSS_STR-UMREZ sy-vline 
WA_MTQSS_STR-UMREN sy-vline 
WA_MTQSS_STR-KZREV sy-vline 
WA_MTQSS_STR-RBNRM sy-vline 
WA_MTQSS_STR-QMATA sy-vline 
WA_MTQSS_STR-XCHPF sy-vline 
WA_MTQSS_STR-MPROF sy-vline 
WA_MTQSS_STR-SERNP sy-vline 
WA_MTQSS_STR-XGCHP sy-vline 
WA_MTQSS_STR-KZKRI sy-vline 
WA_MTQSS_STR-MATKL sy-vline 
WA_MTQSS_STR-PRDHA sy-vline      INTO ld_text SEPARATED BY SPACE.

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