ABAP Select data from SAP table IUUC_NRIVLO_SNAP into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IUUC_NRIVLO_SNAP
*  INTO TABLE @DATA(IT_IUUC_NRIVLO_SNAP2).
*--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_IUUC_NRIVLO_SNAP INDEX 1 INTO DATA(WA_IUUC_NRIVLO_SNAP2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IUUC_NRIVLO_SNAP>-INSTANZ = 1.
<IUUC_NRIVLO_SNAP>-OBJECT = 1.
<IUUC_NRIVLO_SNAP>-SUBOBJECT = 1.
<IUUC_NRIVLO_SNAP>-NRRANGENR = 1.
<IUUC_NRIVLO_SNAP>-TOYEAR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IUUC_NRIVLO_SNAP-DATUM, sy-vline,
  WA_IUUC_NRIVLO_SNAP-UZEIT, sy-vline,
  WA_IUUC_NRIVLO_SNAP-SOURCECLN, sy-vline,
  WA_IUUC_NRIVLO_SNAP-FROMNR, sy-vline,
  WA_IUUC_NRIVLO_SNAP-TONUMBER, sy-vline,
  WA_IUUC_NRIVLO_SNAP-NRLEVEL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IUUC_NRIVLO_SNAP 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_IUUC_NRIVLO_SNAP 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_IUUC_NRIVLO_SNAP INTO WA_IUUC_NRIVLO_SNAP.


*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 GJAHR, internal->external for field TOYEAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_IUUC_NRIVLO_SNAP-TOYEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IUUC_NRIVLO_SNAP-TOYEAR.
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_IUUC_NRIVLO_SNAP_STR, 
INSTANZ TYPE STRING,
OBJECT TYPE STRING,
SUBOBJECT TYPE STRING,
NRRANGENR TYPE STRING,
TOYEAR TYPE STRING,
DATUM TYPE STRING,
UZEIT TYPE STRING,
SOURCECLN TYPE STRING,
FROMNR TYPE STRING,
TONUMBER TYPE STRING,
NRLEVEL TYPE STRING,
EXTERNIND TYPE STRING,
G_FROMNR TYPE STRING,
G_TONR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IUUC_NRIVLO_SNAP_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_IUUC_NRIVLO_SNAP_STR-INSTANZ sy-vline 
WA_IUUC_NRIVLO_SNAP_STR-OBJECT sy-vline 
WA_IUUC_NRIVLO_SNAP_STR-SUBOBJECT sy-vline 
WA_IUUC_NRIVLO_SNAP_STR-NRRANGENR sy-vline 
WA_IUUC_NRIVLO_SNAP_STR-TOYEAR sy-vline 
WA_IUUC_NRIVLO_SNAP_STR-DATUM sy-vline 
WA_IUUC_NRIVLO_SNAP_STR-UZEIT sy-vline 
WA_IUUC_NRIVLO_SNAP_STR-SOURCECLN sy-vline 
WA_IUUC_NRIVLO_SNAP_STR-FROMNR sy-vline 
WA_IUUC_NRIVLO_SNAP_STR-TONUMBER sy-vline 
WA_IUUC_NRIVLO_SNAP_STR-NRLEVEL sy-vline 
WA_IUUC_NRIVLO_SNAP_STR-EXTERNIND sy-vline 
WA_IUUC_NRIVLO_SNAP_STR-G_FROMNR sy-vline 
WA_IUUC_NRIVLO_SNAP_STR-G_TONR sy-vline      INTO ld_text SEPARATED BY SPACE.

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