ABAP Select data from SAP table QETREEINFO into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM QETREEINFO
*  INTO TABLE @DATA(IT_QETREEINFO2).
*--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_QETREEINFO INDEX 1 INTO DATA(WA_QETREEINFO2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<QETREEINFO>-PRUEFLOS = 1.
<QETREEINFO>-MATNR = 1.
<QETREEINFO>-CHARG = 1.
<QETREEINFO>-ART = 1.
<QETREEINFO>-ENSTEHDAT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_QETREEINFO-PASTRTERM, sy-vline,
  WA_QETREEINFO-PAENDTERM, sy-vline,
  WA_QETREEINFO-AUFNR, sy-vline,
  WA_QETREEINFO-LS_KDAUF, sy-vline,
  WA_QETREEINFO-KUNNR, sy-vline,
  WA_QETREEINFO-LIFNR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_QETREEINFO 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_QETREEINFO 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_QETREEINFO INTO WA_QETREEINFO.


*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 ALPHA, internal->external for field PRUEFLOS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_QETREEINFO-PRUEFLOS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_QETREEINFO-PRUEFLOS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_QETREEINFO-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_QETREEINFO-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field AUFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_QETREEINFO-AUFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_QETREEINFO-AUFNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LS_KDAUF
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_QETREEINFO-LS_KDAUF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_QETREEINFO-LS_KDAUF.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KUNNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_QETREEINFO-KUNNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_QETREEINFO-KUNNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LIFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_QETREEINFO-LIFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_QETREEINFO-LIFNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field HERSTELLER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_QETREEINFO-HERSTELLER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_QETREEINFO-HERSTELLER.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field MBLNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_QETREEINFO-MBLNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_QETREEINFO-MBLNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field MJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_QETREEINFO-MJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_QETREEINFO-MJAHR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PMETHODE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_QETREEINFO-PMETHODE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_QETREEINFO-PMETHODE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VERWMERKM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_QETREEINFO-VERWMERKM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_QETREEINFO-VERWMERKM.
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_QETREEINFO_STR, 
PRUEFLOS TYPE STRING,
MATNR TYPE STRING,
CHARG TYPE STRING,
ART TYPE STRING,
ENSTEHDAT TYPE STRING,
PASTRTERM TYPE STRING,
PAENDTERM TYPE STRING,
AUFNR TYPE STRING,
LS_KDAUF TYPE STRING,
KUNNR TYPE STRING,
LIFNR TYPE STRING,
HERSTELLER TYPE STRING,
LICHN TYPE STRING,
MBLNR TYPE STRING,
MJAHR TYPE STRING,
KTEXTMAT TYPE STRING,
KTEXTLOS TYPE STRING,
INSP_DOC_NUMBER TYPE STRING,
PRIO_PUNKTE TYPE STRING,
LAGORTVORG TYPE STRING,
VBEWERTUNG TYPE STRING,
VORSTEUS TYPE STRING,
PMETHODE TYPE STRING,
KURZTEXT TYPE STRING,
VERWMERKM TYPE STRING,
ENTSTEHDAT TYPE STRING,
LAGORTCHRG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_QETREEINFO_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_QETREEINFO_STR-PRUEFLOS sy-vline 
WA_QETREEINFO_STR-MATNR sy-vline 
WA_QETREEINFO_STR-CHARG sy-vline 
WA_QETREEINFO_STR-ART sy-vline 
WA_QETREEINFO_STR-ENSTEHDAT sy-vline 
WA_QETREEINFO_STR-PASTRTERM sy-vline 
WA_QETREEINFO_STR-PAENDTERM sy-vline 
WA_QETREEINFO_STR-AUFNR sy-vline 
WA_QETREEINFO_STR-LS_KDAUF sy-vline 
WA_QETREEINFO_STR-KUNNR sy-vline 
WA_QETREEINFO_STR-LIFNR sy-vline 
WA_QETREEINFO_STR-HERSTELLER sy-vline 
WA_QETREEINFO_STR-LICHN sy-vline 
WA_QETREEINFO_STR-MBLNR sy-vline 
WA_QETREEINFO_STR-MJAHR sy-vline 
WA_QETREEINFO_STR-KTEXTMAT sy-vline 
WA_QETREEINFO_STR-KTEXTLOS sy-vline 
WA_QETREEINFO_STR-INSP_DOC_NUMBER sy-vline 
WA_QETREEINFO_STR-PRIO_PUNKTE sy-vline 
WA_QETREEINFO_STR-LAGORTVORG sy-vline 
WA_QETREEINFO_STR-VBEWERTUNG sy-vline 
WA_QETREEINFO_STR-VORSTEUS sy-vline 
WA_QETREEINFO_STR-PMETHODE sy-vline 
WA_QETREEINFO_STR-KURZTEXT sy-vline 
WA_QETREEINFO_STR-VERWMERKM sy-vline 
WA_QETREEINFO_STR-ENTSTEHDAT sy-vline 
WA_QETREEINFO_STR-LAGORTCHRG sy-vline      INTO ld_text SEPARATED BY SPACE.

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