ABAP Select data from SAP table VN1MPPS into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP VN1MPPS 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 VN1MPPS. 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 VN1MPPS 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_VN1MPPS TYPE STANDARD TABLE OF VN1MPPS,
      WA_VN1MPPS TYPE VN1MPPS,
      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: <VN1MPPS> TYPE VN1MPPS.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_VN1MPPS.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM VN1MPPS
  INTO TABLE IT_VN1MPPS.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM VN1MPPS
*  INTO TABLE @DATA(IT_VN1MPPS2).
*--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_VN1MPPS INDEX 1 INTO DATA(WA_VN1MPPS2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_VN1MPPS ASSIGNING <VN1MPPS>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<VN1MPPS>-MANDT = 1.
<VN1MPPS>-MPPSID = 1.
<VN1MPPS>-RECNO = 1.
<VN1MPPS>-STATUS = 1.
<VN1MPPS>-PATID = 1.

ENDLOOP.

LOOP AT IT_VN1MPPS INTO WA_VN1MPPS.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_VN1MPPS-PATNAM, sy-vline,
  WA_VN1MPPS-GBDAT, sy-vline,
  WA_VN1MPPS-GESCHL, sy-vline,
  WA_VN1MPPS-ACCNO, sy-vline,
  WA_VN1MPPS-REQPROCID, sy-vline,
  WA_VN1MPPS-STUDYUIDSCHED, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_VN1MPPS 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_VN1MPPS 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_VN1MPPS INTO WA_VN1MPPS.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_VN1MPPS_STR, 
MANDT TYPE STRING,
MPPSID TYPE STRING,
RECNO TYPE STRING,
STATUS TYPE STRING,
PATID TYPE STRING,
PATNAM TYPE STRING,
GBDAT TYPE STRING,
GESCHL TYPE STRING,
ACCNO TYPE STRING,
REQPROCID TYPE STRING,
STUDYUIDSCHED TYPE STRING,
STUDYUID TYPE STRING,
STUDYDSC TYPE STRING,
STUDYIMGCNT TYPE STRING,
STUDYDAT TYPE STRING,
STUDYTIM TYPE STRING,
STUDYMODALITY TYPE STRING,
ENTRANCEDOSE TYPE STRING,
EXPOSURECOUNT TYPE STRING,
ANATOMICSTRUCTUR TYPE STRING,
IMAGEDOSEPRODUCT TYPE STRING,
FLUROSCOPYTIME TYPE STRING,
STUDYSTATUS TYPE STRING,
PERFSTATAET TYPE STRING,
ERDAT TYPE STRING,
ERTIM TYPE STRING,
UPDAT TYPE STRING,
UPTIM TYPE STRING,
RECONKEY TYPE STRING,
RECONPATNR TYPE STRING,
RECONUSER TYPE STRING,
RECONDAT TYPE STRING,
RECONTIM TYPE STRING,
SOURCE TYPE STRING,
IMAGES_AVAILABLE TYPE STRING,
KZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_VN1MPPS_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_VN1MPPS_STR-MANDT sy-vline 
WA_VN1MPPS_STR-MPPSID sy-vline 
WA_VN1MPPS_STR-RECNO sy-vline 
WA_VN1MPPS_STR-STATUS sy-vline 
WA_VN1MPPS_STR-PATID sy-vline 
WA_VN1MPPS_STR-PATNAM sy-vline 
WA_VN1MPPS_STR-GBDAT sy-vline 
WA_VN1MPPS_STR-GESCHL sy-vline 
WA_VN1MPPS_STR-ACCNO sy-vline 
WA_VN1MPPS_STR-REQPROCID sy-vline 
WA_VN1MPPS_STR-STUDYUIDSCHED sy-vline 
WA_VN1MPPS_STR-STUDYUID sy-vline 
WA_VN1MPPS_STR-STUDYDSC sy-vline 
WA_VN1MPPS_STR-STUDYIMGCNT sy-vline 
WA_VN1MPPS_STR-STUDYDAT sy-vline 
WA_VN1MPPS_STR-STUDYTIM sy-vline 
WA_VN1MPPS_STR-STUDYMODALITY sy-vline 
WA_VN1MPPS_STR-ENTRANCEDOSE sy-vline 
WA_VN1MPPS_STR-EXPOSURECOUNT sy-vline 
WA_VN1MPPS_STR-ANATOMICSTRUCTUR sy-vline 
WA_VN1MPPS_STR-IMAGEDOSEPRODUCT sy-vline 
WA_VN1MPPS_STR-FLUROSCOPYTIME sy-vline 
WA_VN1MPPS_STR-STUDYSTATUS sy-vline 
WA_VN1MPPS_STR-PERFSTATAET sy-vline 
WA_VN1MPPS_STR-ERDAT sy-vline 
WA_VN1MPPS_STR-ERTIM sy-vline 
WA_VN1MPPS_STR-UPDAT sy-vline 
WA_VN1MPPS_STR-UPTIM sy-vline 
WA_VN1MPPS_STR-RECONKEY sy-vline 
WA_VN1MPPS_STR-RECONPATNR sy-vline 
WA_VN1MPPS_STR-RECONUSER sy-vline 
WA_VN1MPPS_STR-RECONDAT sy-vline 
WA_VN1MPPS_STR-RECONTIM sy-vline 
WA_VN1MPPS_STR-SOURCE sy-vline 
WA_VN1MPPS_STR-IMAGES_AVAILABLE sy-vline 
WA_VN1MPPS_STR-KZ sy-vline      INTO ld_text SEPARATED BY SPACE.

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