ABAP Select data from SAP table RECNAPUNIT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RECNAPUNIT
*  INTO TABLE @DATA(IT_RECNAPUNIT2).
*--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_RECNAPUNIT INDEX 1 INTO DATA(WA_RECNAPUNIT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RECNAPUNIT>-MANDT = 1.
<RECNAPUNIT>-SABRG = 1.
<RECNAPUNIT>-GRDANT = 1.
<RECNAPUNIT>-JUMLE = 1.
<RECNAPUNIT>-JVERBR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RECNAPUNIT-JZEND, sy-vline,
  WA_RECNAPUNIT-JUMLKOAR, sy-vline,
  WA_RECNAPUNIT-JPROZENT, sy-vline,
  WA_RECNAPUNIT-ATNAM, sy-vline,
  WA_RECNAPUNIT-JLEER0, sy-vline,
  WA_RECNAPUNIT-MPTYP, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RECNAPUNIT 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_RECNAPUNIT 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_RECNAPUNIT INTO WA_RECNAPUNIT.


*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 CUNIT, internal->external for field XEINHEIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_RECNAPUNIT-XEINHEIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RECNAPUNIT-XEINHEIT.
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_RECNAPUNIT_STR, 
MANDT TYPE STRING,
SABRG TYPE STRING,
GRDANT TYPE STRING,
JUMLE TYPE STRING,
JVERBR TYPE STRING,
JZEND TYPE STRING,
JUMLKOAR TYPE STRING,
JPROZENT TYPE STRING,
ATNAM TYPE STRING,
JLEER0 TYPE STRING,
MPTYP TYPE STRING,
JUMLGLEI TYPE STRING,
JDIRECT TYPE STRING,
FLG_GW TYPE STRING,
RECNAFOBJ TYPE STRING,
XUMLEL TYPE STRING,
XUMLEK TYPE STRING,
XEINHEIT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RECNAPUNIT_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_RECNAPUNIT_STR-MANDT sy-vline 
WA_RECNAPUNIT_STR-SABRG sy-vline 
WA_RECNAPUNIT_STR-GRDANT sy-vline 
WA_RECNAPUNIT_STR-JUMLE sy-vline 
WA_RECNAPUNIT_STR-JVERBR sy-vline 
WA_RECNAPUNIT_STR-JZEND sy-vline 
WA_RECNAPUNIT_STR-JUMLKOAR sy-vline 
WA_RECNAPUNIT_STR-JPROZENT sy-vline 
WA_RECNAPUNIT_STR-ATNAM sy-vline 
WA_RECNAPUNIT_STR-JLEER0 sy-vline 
WA_RECNAPUNIT_STR-MPTYP sy-vline 
WA_RECNAPUNIT_STR-JUMLGLEI sy-vline 
WA_RECNAPUNIT_STR-JDIRECT sy-vline 
WA_RECNAPUNIT_STR-FLG_GW sy-vline 
WA_RECNAPUNIT_STR-RECNAFOBJ sy-vline 
WA_RECNAPUNIT_STR-XUMLEL sy-vline 
WA_RECNAPUNIT_STR-XUMLEK sy-vline 
WA_RECNAPUNIT_STR-XEINHEIT sy-vline      INTO ld_text SEPARATED BY SPACE.

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