ABAP Select data from SAP table ROIJNOMBPA into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ROIJNOMBPA
*  INTO TABLE @DATA(IT_ROIJNOMBPA2).
*--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_ROIJNOMBPA INDEX 1 INTO DATA(WA_ROIJNOMBPA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ROIJNOMBPA>-NOMTK = 1.
<ROIJNOMBPA>-NOMIT = 1.
<ROIJNOMBPA>-RTYPE = 1.
<ROIJNOMBPA>-PARVW = 1.
<ROIJNOMBPA>-NRART = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ROIJNOMBPA-LIFNR, sy-vline,
  WA_ROIJNOMBPA-KUNNR, sy-vline,
  WA_ROIJNOMBPA-PERNR, sy-vline,
  WA_ROIJNOMBPA-PARNR, sy-vline,
  WA_ROIJNOMBPA-RPART, sy-vline,
  WA_ROIJNOMBPA-CPARID, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ROIJNOMBPA 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_ROIJNOMBPA 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_ROIJNOMBPA INTO WA_ROIJNOMBPA.


*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 NOMTK
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ROIJNOMBPA-NOMTK
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ROIJNOMBPA-NOMTK.
WRITE:/ 'New Value:', ld_input.

*Conversion exit PARVW, internal->external for field PARVW
CALL FUNCTION 'CONVERSION_EXIT_PARVW_OUTPUT'
  EXPORTING
    input =                      WA_ROIJNOMBPA-PARVW
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ROIJNOMBPA-PARVW.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit ALPHA, internal->external for field CPARID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ROIJNOMBPA-CPARID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ROIJNOMBPA-CPARID.
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_ROIJNOMBPA_STR, 
NOMTK TYPE STRING,
NOMIT TYPE STRING,
RTYPE TYPE STRING,
PARVW TYPE STRING,
NRART TYPE STRING,
LIFNR TYPE STRING,
KUNNR TYPE STRING,
PERNR TYPE STRING,
PARNR TYPE STRING,
RPART TYPE STRING,
CPARID TYPE STRING,
COMMID_INT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ROIJNOMBPA_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_ROIJNOMBPA_STR-NOMTK sy-vline 
WA_ROIJNOMBPA_STR-NOMIT sy-vline 
WA_ROIJNOMBPA_STR-RTYPE sy-vline 
WA_ROIJNOMBPA_STR-PARVW sy-vline 
WA_ROIJNOMBPA_STR-NRART sy-vline 
WA_ROIJNOMBPA_STR-LIFNR sy-vline 
WA_ROIJNOMBPA_STR-KUNNR sy-vline 
WA_ROIJNOMBPA_STR-PERNR sy-vline 
WA_ROIJNOMBPA_STR-PARNR sy-vline 
WA_ROIJNOMBPA_STR-RPART sy-vline 
WA_ROIJNOMBPA_STR-CPARID sy-vline 
WA_ROIJNOMBPA_STR-COMMID_INT sy-vline      INTO ld_text SEPARATED BY SPACE.

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