ABAP Select data from SAP table RN1_VITPAR_SNAPSHOT into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RN1_VITPAR_SNAPSHOT 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 RN1_VITPAR_SNAPSHOT. 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 RN1_VITPAR_SNAPSHOT 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_RN1_VITPAR_SNAPSHOT TYPE STANDARD TABLE OF RN1_VITPAR_SNAPSHOT,
      WA_RN1_VITPAR_SNAPSHOT TYPE RN1_VITPAR_SNAPSHOT,
      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: <RN1_VITPAR_SNAPSHOT> TYPE RN1_VITPAR_SNAPSHOT.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RN1_VITPAR_SNAPSHOT.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RN1_VITPAR_SNAPSHOT
  INTO TABLE IT_RN1_VITPAR_SNAPSHOT.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RN1_VITPAR_SNAPSHOT
*  INTO TABLE @DATA(IT_RN1_VITPAR_SNAPSHOT2).
*--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_RN1_VITPAR_SNAPSHOT INDEX 1 INTO DATA(WA_RN1_VITPAR_SNAPSHOT2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RN1_VITPAR_SNAPSHOT ASSIGNING <RN1_VITPAR_SNAPSHOT>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RN1_VITPAR_SNAPSHOT>-KEY = 1.
<RN1_VITPAR_SNAPSHOT>-ACTIVE = 1.
<RN1_VITPAR_SNAPSHOT>-MODE = 1.
<RN1_VITPAR_SNAPSHOT>-N1VP = 1.
<RN1_VITPAR_SNAPSHOT>-MANDT = 1.

ENDLOOP.

LOOP AT IT_RN1_VITPAR_SNAPSHOT INTO WA_RN1_VITPAR_SNAPSHOT.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RN1_VITPAR_SNAPSHOT-VPID, sy-vline,
  WA_RN1_VITPAR_SNAPSHOT-EINRI, sy-vline,
  WA_RN1_VITPAR_SNAPSHOT-VPPID, sy-vline,
  WA_RN1_VITPAR_SNAPSHOT-PATNR, sy-vline,
  WA_RN1_VITPAR_SNAPSHOT-VDATE, sy-vline,
  WA_RN1_VITPAR_SNAPSHOT-VTIME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RN1_VITPAR_SNAPSHOT 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_RN1_VITPAR_SNAPSHOT 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_RN1_VITPAR_SNAPSHOT INTO WA_RN1_VITPAR_SNAPSHOT.


*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 EINRI
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1_VITPAR_SNAPSHOT-EINRI
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1_VITPAR_SNAPSHOT-EINRI.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PATNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1_VITPAR_SNAPSHOT-PATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1_VITPAR_SNAPSHOT-PATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ERFOE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1_VITPAR_SNAPSHOT-ERFOE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1_VITPAR_SNAPSHOT-ERFOE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field FACHOE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1_VITPAR_SNAPSHOT-FACHOE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1_VITPAR_SNAPSHOT-FACHOE.
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_RN1_VITPAR_SNAPSHOT_STR, 
KEY TYPE STRING,
ACTIVE TYPE STRING,
MODE TYPE STRING,
N1VP TYPE STRING,
MANDT TYPE STRING,
VPID TYPE STRING,
EINRI TYPE STRING,
VPPID TYPE STRING,
PATNR TYPE STRING,
VDATE TYPE STRING,
VTIME TYPE STRING,
ERFOE TYPE STRING,
FACHOE TYPE STRING,
VWERT TYPE STRING,
VWERTZW TYPE STRING,
VWERTNM TYPE STRING,
VBEM TYPE STRING,
VDNOTIZ TYPE STRING,
ERDAT TYPE STRING,
ERUSR TYPE STRING,
UPDAT TYPE STRING,
UPUSR TYPE STRING,
STORN TYPE STRING,
STDAT TYPE STRING,
STUSR TYPE STRING,
STOID TYPE STRING,
SNAPKEY_OBJCENTRAL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RN1_VITPAR_SNAPSHOT_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_RN1_VITPAR_SNAPSHOT_STR-KEY sy-vline 
WA_RN1_VITPAR_SNAPSHOT_STR-ACTIVE sy-vline 
WA_RN1_VITPAR_SNAPSHOT_STR-MODE sy-vline 
WA_RN1_VITPAR_SNAPSHOT_STR-N1VP sy-vline 
WA_RN1_VITPAR_SNAPSHOT_STR-MANDT sy-vline 
WA_RN1_VITPAR_SNAPSHOT_STR-VPID sy-vline 
WA_RN1_VITPAR_SNAPSHOT_STR-EINRI sy-vline 
WA_RN1_VITPAR_SNAPSHOT_STR-VPPID sy-vline 
WA_RN1_VITPAR_SNAPSHOT_STR-PATNR sy-vline 
WA_RN1_VITPAR_SNAPSHOT_STR-VDATE sy-vline 
WA_RN1_VITPAR_SNAPSHOT_STR-VTIME sy-vline 
WA_RN1_VITPAR_SNAPSHOT_STR-ERFOE sy-vline 
WA_RN1_VITPAR_SNAPSHOT_STR-FACHOE sy-vline 
WA_RN1_VITPAR_SNAPSHOT_STR-VWERT sy-vline 
WA_RN1_VITPAR_SNAPSHOT_STR-VWERTZW sy-vline 
WA_RN1_VITPAR_SNAPSHOT_STR-VWERTNM sy-vline 
WA_RN1_VITPAR_SNAPSHOT_STR-VBEM sy-vline 
WA_RN1_VITPAR_SNAPSHOT_STR-VDNOTIZ sy-vline 
WA_RN1_VITPAR_SNAPSHOT_STR-ERDAT sy-vline 
WA_RN1_VITPAR_SNAPSHOT_STR-ERUSR sy-vline 
WA_RN1_VITPAR_SNAPSHOT_STR-UPDAT sy-vline 
WA_RN1_VITPAR_SNAPSHOT_STR-UPUSR sy-vline 
WA_RN1_VITPAR_SNAPSHOT_STR-STORN sy-vline 
WA_RN1_VITPAR_SNAPSHOT_STR-STDAT sy-vline 
WA_RN1_VITPAR_SNAPSHOT_STR-STUSR sy-vline 
WA_RN1_VITPAR_SNAPSHOT_STR-STOID sy-vline 
WA_RN1_VITPAR_SNAPSHOT_STR-SNAPKEY_OBJCENTRAL sy-vline      INTO ld_text SEPARATED BY SPACE.

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