ABAP Select data from SAP table NPTXB into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM NPTXB
*  INTO TABLE @DATA(IT_NPTXB2).
*--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_NPTXB INDEX 1 INTO DATA(WA_NPTXB2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<NPTXB>-NPMANDT = 1.
<NPTXB>-NPAUFPL = 1.
<NPTXB>-NPAPLZL = 1.
<NPTXB>-NPTXTKY = 1.
<NPTXB>-NPLOEKZ = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_NPTXB-PSMANDT, sy-vline,
  WA_NPTXB-PSTXTKY, sy-vline,
  WA_NPTXB-PSTXTAR, sy-vline,
  WA_NPTXB-PSTXTTI, sy-vline,
  WA_NPTXB-PSTXTHU, sy-vline,
  WA_NPTXB-PSTXTHD, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_NPTXB 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_NPTXB 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_NPTXB INTO WA_NPTXB.


*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 ISOLA, internal->external for field SPRAS
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_NPTXB-SPRAS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_NPTXB-SPRAS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field AUFNR_T
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_NPTXB-AUFNR_T
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_NPTXB-AUFNR_T.
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_NPTXB_STR, 
NPMANDT TYPE STRING,
NPAUFPL TYPE STRING,
NPAPLZL TYPE STRING,
NPTXTKY TYPE STRING,
NPLOEKZ TYPE STRING,
PSMANDT TYPE STRING,
PSTXTKY TYPE STRING,
PSTXTAR TYPE STRING,
PSTXTTI TYPE STRING,
PSTXTHU TYPE STRING,
PSTXTHD TYPE STRING,
PSTXTAU TYPE STRING,
PSTXTAD TYPE STRING,
PSFORMAT TYPE STRING,
LASTCHANGEDON TYPE STRING,
SPRAS TYPE STRING,
VSNMR TYPE STRING,
VBKZ TYPE STRING,
FLG_SEL TYPE STRING,
AUFNR_T TYPE STRING,
FLG_CALCUL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_NPTXB_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_NPTXB_STR-NPMANDT sy-vline 
WA_NPTXB_STR-NPAUFPL sy-vline 
WA_NPTXB_STR-NPAPLZL sy-vline 
WA_NPTXB_STR-NPTXTKY sy-vline 
WA_NPTXB_STR-NPLOEKZ sy-vline 
WA_NPTXB_STR-PSMANDT sy-vline 
WA_NPTXB_STR-PSTXTKY sy-vline 
WA_NPTXB_STR-PSTXTAR sy-vline 
WA_NPTXB_STR-PSTXTTI sy-vline 
WA_NPTXB_STR-PSTXTHU sy-vline 
WA_NPTXB_STR-PSTXTHD sy-vline 
WA_NPTXB_STR-PSTXTAU sy-vline 
WA_NPTXB_STR-PSTXTAD sy-vline 
WA_NPTXB_STR-PSFORMAT sy-vline 
WA_NPTXB_STR-LASTCHANGEDON sy-vline 
WA_NPTXB_STR-SPRAS sy-vline 
WA_NPTXB_STR-VSNMR sy-vline 
WA_NPTXB_STR-VBKZ sy-vline 
WA_NPTXB_STR-FLG_SEL sy-vline 
WA_NPTXB_STR-AUFNR_T sy-vline 
WA_NPTXB_STR-FLG_CALCUL sy-vline      INTO ld_text SEPARATED BY SPACE.

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