ABAP Select data from SAP table P10P_QTREE into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP P10P_QTREE 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 P10P_QTREE. 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 P10P_QTREE 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_P10P_QTREE TYPE STANDARD TABLE OF P10P_QTREE,
      WA_P10P_QTREE TYPE P10P_QTREE,
      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: <P10P_QTREE> TYPE P10P_QTREE.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_P10P_QTREE.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM P10P_QTREE
  INTO TABLE IT_P10P_QTREE.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM P10P_QTREE
*  INTO TABLE @DATA(IT_P10P_QTREE2).
*--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_P10P_QTREE INDEX 1 INTO DATA(WA_P10P_QTREE2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_P10P_QTREE ASSIGNING <P10P_QTREE>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<P10P_QTREE>-PERNR = 1.
<P10P_QTREE>-ENAME = 1.
<P10P_QTREE>-OBJID = 1.
<P10P_QTREE>-STEXT = 1.
<P10P_QTREE>-SCODE = 1.

ENDLOOP.

LOOP AT IT_P10P_QTREE INTO WA_P10P_QTREE.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_P10P_QTREE-QLBEG, sy-vline,
  WA_P10P_QTREE-QLEND, sy-vline,
  WA_P10P_QTREE-SCBEG, sy-vline,
  WA_P10P_QTREE-SCEND, sy-vline,
  WA_P10P_QTREE-CTBEG, sy-vline,
  WA_P10P_QTREE-CTEND, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_P10P_QTREE 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_P10P_QTREE 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_P10P_QTREE INTO WA_P10P_QTREE.


*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_P10P_QTREE_STR, 
PERNR TYPE STRING,
ENAME TYPE STRING,
OBJID TYPE STRING,
STEXT TYPE STRING,
SCODE TYPE STRING,
QLBEG TYPE STRING,
QLEND TYPE STRING,
SCBEG TYPE STRING,
SCEND TYPE STRING,
CTBEG TYPE STRING,
CTEND TYPE STRING,
ITBEG TYPE STRING,
ITEND TYPE STRING,
CTNUM TYPE STRING,
TYPEC TYPE STRING,
CLASS TYPE STRING,
SUBJT TYPE STRING,
SUBLV TYPE STRING,END OF T_EKKO_STR.
DATA: WA_P10P_QTREE_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_P10P_QTREE_STR-PERNR sy-vline 
WA_P10P_QTREE_STR-ENAME sy-vline 
WA_P10P_QTREE_STR-OBJID sy-vline 
WA_P10P_QTREE_STR-STEXT sy-vline 
WA_P10P_QTREE_STR-SCODE sy-vline 
WA_P10P_QTREE_STR-QLBEG sy-vline 
WA_P10P_QTREE_STR-QLEND sy-vline 
WA_P10P_QTREE_STR-SCBEG sy-vline 
WA_P10P_QTREE_STR-SCEND sy-vline 
WA_P10P_QTREE_STR-CTBEG sy-vline 
WA_P10P_QTREE_STR-CTEND sy-vline 
WA_P10P_QTREE_STR-ITBEG sy-vline 
WA_P10P_QTREE_STR-ITEND sy-vline 
WA_P10P_QTREE_STR-CTNUM sy-vline 
WA_P10P_QTREE_STR-TYPEC sy-vline 
WA_P10P_QTREE_STR-CLASS sy-vline 
WA_P10P_QTREE_STR-SUBJT sy-vline 
WA_P10P_QTREE_STR-SUBLV sy-vline      INTO ld_text SEPARATED BY SPACE.

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