ABAP Select data from SAP table QTPROTO into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP QTPROTO 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 QTPROTO. 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 QTPROTO 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_QTPROTO TYPE STANDARD TABLE OF QTPROTO,
      WA_QTPROTO TYPE QTPROTO,
      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: <QTPROTO> TYPE QTPROTO.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM QTPROTO
*  INTO TABLE @DATA(IT_QTPROTO2).
*--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_QTPROTO INDEX 1 INTO DATA(WA_QTPROTO2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<QTPROTO>-ACCNR = 1.
<QTPROTO>-HDBEG = 1.
<QTPROTO>-HDEND = 1.
<QTPROTO>-SBGRU = 1.
<QTPROTO>-SBBEG = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_QTPROTO-SBEND, sy-vline,
  WA_QTPROTO-TERMN, sy-vline,
  WA_QTPROTO-VCOND, sy-vline,
  WA_QTPROTO-GDATE, sy-vline,
  WA_QTPROTO-QTYPE, sy-vline,
  WA_QTPROTO-ACCOP, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_QTPROTO 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_QTPROTO 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_QTPROTO INTO WA_QTPROTO.


*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_QTPROTO_STR, 
ACCNR TYPE STRING,
HDBEG TYPE STRING,
HDEND TYPE STRING,
SBGRU TYPE STRING,
SBBEG TYPE STRING,
SBEND TYPE STRING,
TERMN TYPE STRING,
VCOND TYPE STRING,
GDATE TYPE STRING,
QTYPE TYPE STRING,
ACCOP TYPE STRING,
ACCAC TYPE STRING,
ACCCU TYPE STRING,
ACCTR TYPE STRING,
TRANS TYPE STRING,
ACCAC_REV TYPE STRING,
MAXEX_ACC TYPE STRING,
MAXEX_ENT TYPE STRING,
ACCFR TYPE STRING,
AFREQ TYPE STRING,
ACCDL TYPE STRING,
LVPER TYPE STRING,
LFREQ TYPE STRING,
LVDAT TYPE STRING,
LSIZE TYPE STRING,
LVMAX_ACC TYPE STRING,
LVRND_ACC TYPE STRING,
LVCUT_ACC TYPE STRING,
LVMAX_ENT TYPE STRING,
LVRND_ENT TYPE STRING,
BEGDA TYPE STRING,
ENDDA TYPE STRING,
BEGDE TYPE STRING,
ENDDE TYPE STRING,
PRVQT TYPE STRING,
BASNR TYPE STRING,
LRULE TYPE STRING,
ACCDT TYPE STRING,
ACCRV TYPE STRING,
ACCRU TYPE STRING,
QTYPE_CUT TYPE STRING,
QNUMB_CUT TYPE STRING,
BEGDA_CUT TYPE STRING,
ENDDA_CUT TYPE STRING,
BEGDE_CUT TYPE STRING,
ENDDE_CUT TYPE STRING,
QTYPE_MAX TYPE STRING,
QNUMB_MAX TYPE STRING,
BEGDA_MAX TYPE STRING,
ENDDA_MAX TYPE STRING,
BEGDE_MAX TYPE STRING,
ENDDE_MAX TYPE STRING,END OF T_EKKO_STR.
DATA: WA_QTPROTO_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_QTPROTO_STR-ACCNR sy-vline 
WA_QTPROTO_STR-HDBEG sy-vline 
WA_QTPROTO_STR-HDEND sy-vline 
WA_QTPROTO_STR-SBGRU sy-vline 
WA_QTPROTO_STR-SBBEG sy-vline 
WA_QTPROTO_STR-SBEND sy-vline 
WA_QTPROTO_STR-TERMN sy-vline 
WA_QTPROTO_STR-VCOND sy-vline 
WA_QTPROTO_STR-GDATE sy-vline 
WA_QTPROTO_STR-QTYPE sy-vline 
WA_QTPROTO_STR-ACCOP sy-vline 
WA_QTPROTO_STR-ACCAC sy-vline 
WA_QTPROTO_STR-ACCCU sy-vline 
WA_QTPROTO_STR-ACCTR sy-vline 
WA_QTPROTO_STR-TRANS sy-vline 
WA_QTPROTO_STR-ACCAC_REV sy-vline 
WA_QTPROTO_STR-MAXEX_ACC sy-vline 
WA_QTPROTO_STR-MAXEX_ENT sy-vline 
WA_QTPROTO_STR-ACCFR sy-vline 
WA_QTPROTO_STR-AFREQ sy-vline 
WA_QTPROTO_STR-ACCDL sy-vline 
WA_QTPROTO_STR-LVPER sy-vline 
WA_QTPROTO_STR-LFREQ sy-vline 
WA_QTPROTO_STR-LVDAT sy-vline 
WA_QTPROTO_STR-LSIZE sy-vline 
WA_QTPROTO_STR-LVMAX_ACC sy-vline 
WA_QTPROTO_STR-LVRND_ACC sy-vline 
WA_QTPROTO_STR-LVCUT_ACC sy-vline 
WA_QTPROTO_STR-LVMAX_ENT sy-vline 
WA_QTPROTO_STR-LVRND_ENT sy-vline 
WA_QTPROTO_STR-BEGDA sy-vline 
WA_QTPROTO_STR-ENDDA sy-vline 
WA_QTPROTO_STR-BEGDE sy-vline 
WA_QTPROTO_STR-ENDDE sy-vline 
WA_QTPROTO_STR-PRVQT sy-vline 
WA_QTPROTO_STR-BASNR sy-vline 
WA_QTPROTO_STR-LRULE sy-vline 
WA_QTPROTO_STR-ACCDT sy-vline 
WA_QTPROTO_STR-ACCRV sy-vline 
WA_QTPROTO_STR-ACCRU sy-vline 
WA_QTPROTO_STR-QTYPE_CUT sy-vline 
WA_QTPROTO_STR-QNUMB_CUT sy-vline 
WA_QTPROTO_STR-BEGDA_CUT sy-vline 
WA_QTPROTO_STR-ENDDA_CUT sy-vline 
WA_QTPROTO_STR-BEGDE_CUT sy-vline 
WA_QTPROTO_STR-ENDDE_CUT sy-vline 
WA_QTPROTO_STR-QTYPE_MAX sy-vline 
WA_QTPROTO_STR-QNUMB_MAX sy-vline 
WA_QTPROTO_STR-BEGDA_MAX sy-vline 
WA_QTPROTO_STR-ENDDA_MAX sy-vline 
WA_QTPROTO_STR-BEGDE_MAX sy-vline 
WA_QTPROTO_STR-ENDDE_MAX sy-vline      INTO ld_text SEPARATED BY SPACE.

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