ABAP Select data from SAP table CNPB_W_OBJECTS_IN_HIERARCHY into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CNPB_W_OBJECTS_IN_HIERARCHY
*  INTO TABLE @DATA(IT_CNPB_W_OBJECTS_IN_HIERARCHY2).
*--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_CNPB_W_OBJECTS_IN_HIERARCHY INDEX 1 INTO DATA(WA_CNPB_W_OBJECTS_IN_HIERARCHY2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CNPB_W_OBJECTS_IN_HIERARCHY>-NPR = 1.
<CNPB_W_OBJECTS_IN_HIERARCHY>-NWB = 1.
<CNPB_W_OBJECTS_IN_HIERARCHY>-NOR = 1.
<CNPB_W_OBJECTS_IN_HIERARCHY>-NSN = 1.
<CNPB_W_OBJECTS_IN_HIERARCHY>-NPS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CNPB_W_OBJECTS_IN_HIERARCHY-NIN, sy-vline,
  WA_CNPB_W_OBJECTS_IN_HIERARCHY-NEX, sy-vline,
  WA_CNPB_W_OBJECTS_IN_HIERARCHY-NCS, sy-vline,
  WA_CNPB_W_OBJECTS_IN_HIERARCHY-NSR, sy-vline,
  WA_CNPB_W_OBJECTS_IN_HIERARCHY-NSO, sy-vline,
  WA_CNPB_W_OBJECTS_IN_HIERARCHY-NSI, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CNPB_W_OBJECTS_IN_HIERARCHY 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_CNPB_W_OBJECTS_IN_HIERARCHY 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_CNPB_W_OBJECTS_IN_HIERARCHY INTO WA_CNPB_W_OBJECTS_IN_HIERARCHY.


*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_CNPB_W_OBJECTS_IN_HIERARCHY_STR, 
NPR TYPE STRING,
NWB TYPE STRING,
NOR TYPE STRING,
NSN TYPE STRING,
NPS TYPE STRING,
NIN TYPE STRING,
NEX TYPE STRING,
NCS TYPE STRING,
NSR TYPE STRING,
NSO TYPE STRING,
NSI TYPE STRING,
NSE TYPE STRING,
NSC TYPE STRING,
NSV TYPE STRING,
NMT TYPE STRING,
NMS TYPE STRING,
NAB TYPE STRING,
NTX TYPE STRING,
NDC TYPE STRING,
PRJ TYPE STRING,
WBS TYPE STRING,
ORD TYPE STRING,
SPR TYPE STRING,
SWB TYPE STRING,
SOR TYPE STRING,
VPR TYPE STRING,
VWB TYPE STRING,
VOR TYPE STRING,
HIS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CNPB_W_OBJECTS_IN_HIERARCHY_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_CNPB_W_OBJECTS_IN_HIERARCHY_STR-NPR sy-vline 
WA_CNPB_W_OBJECTS_IN_HIERARCHY_STR-NWB sy-vline 
WA_CNPB_W_OBJECTS_IN_HIERARCHY_STR-NOR sy-vline 
WA_CNPB_W_OBJECTS_IN_HIERARCHY_STR-NSN sy-vline 
WA_CNPB_W_OBJECTS_IN_HIERARCHY_STR-NPS sy-vline 
WA_CNPB_W_OBJECTS_IN_HIERARCHY_STR-NIN sy-vline 
WA_CNPB_W_OBJECTS_IN_HIERARCHY_STR-NEX sy-vline 
WA_CNPB_W_OBJECTS_IN_HIERARCHY_STR-NCS sy-vline 
WA_CNPB_W_OBJECTS_IN_HIERARCHY_STR-NSR sy-vline 
WA_CNPB_W_OBJECTS_IN_HIERARCHY_STR-NSO sy-vline 
WA_CNPB_W_OBJECTS_IN_HIERARCHY_STR-NSI sy-vline 
WA_CNPB_W_OBJECTS_IN_HIERARCHY_STR-NSE sy-vline 
WA_CNPB_W_OBJECTS_IN_HIERARCHY_STR-NSC sy-vline 
WA_CNPB_W_OBJECTS_IN_HIERARCHY_STR-NSV sy-vline 
WA_CNPB_W_OBJECTS_IN_HIERARCHY_STR-NMT sy-vline 
WA_CNPB_W_OBJECTS_IN_HIERARCHY_STR-NMS sy-vline 
WA_CNPB_W_OBJECTS_IN_HIERARCHY_STR-NAB sy-vline 
WA_CNPB_W_OBJECTS_IN_HIERARCHY_STR-NTX sy-vline 
WA_CNPB_W_OBJECTS_IN_HIERARCHY_STR-NDC sy-vline 
WA_CNPB_W_OBJECTS_IN_HIERARCHY_STR-PRJ sy-vline 
WA_CNPB_W_OBJECTS_IN_HIERARCHY_STR-WBS sy-vline 
WA_CNPB_W_OBJECTS_IN_HIERARCHY_STR-ORD sy-vline 
WA_CNPB_W_OBJECTS_IN_HIERARCHY_STR-SPR sy-vline 
WA_CNPB_W_OBJECTS_IN_HIERARCHY_STR-SWB sy-vline 
WA_CNPB_W_OBJECTS_IN_HIERARCHY_STR-SOR sy-vline 
WA_CNPB_W_OBJECTS_IN_HIERARCHY_STR-VPR sy-vline 
WA_CNPB_W_OBJECTS_IN_HIERARCHY_STR-VWB sy-vline 
WA_CNPB_W_OBJECTS_IN_HIERARCHY_STR-VOR sy-vline 
WA_CNPB_W_OBJECTS_IN_HIERARCHY_STR-HIS sy-vline      INTO ld_text SEPARATED BY SPACE.

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