ABAP Select data from SAP table PFSVHIERCTGY into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PFSVHIERCTGY
*  INTO TABLE @DATA(IT_PFSVHIERCTGY2).
*--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_PFSVHIERCTGY INDEX 1 INTO DATA(WA_PFSVHIERCTGY2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PFSVHIERCTGY>-MANDT = 1.
<PFSVHIERCTGY>-HIERARCHYUNIQUENODEID = 1.
<PFSVHIERCTGY>-VERSN = 1.
<PFSVHIERCTGY>-KTOPL = 1.
<PFSVHIERCTGY>-UNIQUEPARENTID = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PFSVHIERCTGY-ERGSL, sy-vline,
  WA_PFSVHIERCTGY-SAKNR, sy-vline,
  WA_PFSVHIERCTGY-FKBER, sy-vline,
  WA_PFSVHIERCTGY-TYPE, sy-vline,
  WA_PFSVHIERCTGY-DESCRIPTION, sy-vline,
  WA_PFSVHIERCTGY-XSOLL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PFSVHIERCTGY 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_PFSVHIERCTGY 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_PFSVHIERCTGY INTO WA_PFSVHIERCTGY.


*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 SAKNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_PFSVHIERCTGY-SAKNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PFSVHIERCTGY-SAKNR.
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_PFSVHIERCTGY_STR, 
MANDT TYPE STRING,
HIERARCHYUNIQUENODEID TYPE STRING,
VERSN TYPE STRING,
KTOPL TYPE STRING,
UNIQUEPARENTID TYPE STRING,
ERGSL TYPE STRING,
SAKNR TYPE STRING,
FKBER TYPE STRING,
TYPE TYPE STRING,
DESCRIPTION TYPE STRING,
XSOLL TYPE STRING,
XHABN TYPE STRING,
ID TYPE STRING,
PARENT TYPE STRING,
CHILD TYPE STRING,
NEXTN TYPE STRING,
STUFE TYPE STRING,
ERGS2 TYPE STRING,
SEGMENT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PFSVHIERCTGY_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_PFSVHIERCTGY_STR-MANDT sy-vline 
WA_PFSVHIERCTGY_STR-HIERARCHYUNIQUENODEID sy-vline 
WA_PFSVHIERCTGY_STR-VERSN sy-vline 
WA_PFSVHIERCTGY_STR-KTOPL sy-vline 
WA_PFSVHIERCTGY_STR-UNIQUEPARENTID sy-vline 
WA_PFSVHIERCTGY_STR-ERGSL sy-vline 
WA_PFSVHIERCTGY_STR-SAKNR sy-vline 
WA_PFSVHIERCTGY_STR-FKBER sy-vline 
WA_PFSVHIERCTGY_STR-TYPE sy-vline 
WA_PFSVHIERCTGY_STR-DESCRIPTION sy-vline 
WA_PFSVHIERCTGY_STR-XSOLL sy-vline 
WA_PFSVHIERCTGY_STR-XHABN sy-vline 
WA_PFSVHIERCTGY_STR-ID sy-vline 
WA_PFSVHIERCTGY_STR-PARENT sy-vline 
WA_PFSVHIERCTGY_STR-CHILD sy-vline 
WA_PFSVHIERCTGY_STR-NEXTN sy-vline 
WA_PFSVHIERCTGY_STR-STUFE sy-vline 
WA_PFSVHIERCTGY_STR-ERGS2 sy-vline 
WA_PFSVHIERCTGY_STR-SEGMENT sy-vline      INTO ld_text SEPARATED BY SPACE.

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