ABAP Select data from SAP table MRP_REQ_NOTE into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MRP_REQ_NOTE
*  INTO TABLE @DATA(IT_MRP_REQ_NOTE2).
*--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_MRP_REQ_NOTE INDEX 1 INTO DATA(WA_MRP_REQ_NOTE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MRP_REQ_NOTE>-MANDT = 1.
<MRP_REQ_NOTE>-REQUEST_ID = 1.
<MRP_REQ_NOTE>-CREATEDON = 1.
<MRP_REQ_NOTE>-CRENAM = 1.
<MRP_REQ_NOTE>-UPDATEDON = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MRP_REQ_NOTE-UPDNAM, sy-vline,
  WA_MRP_REQ_NOTE-MATNR, sy-vline,
  WA_MRP_REQ_NOTE-TYPE, sy-vline,
  WA_MRP_REQ_NOTE-MRPPLANT, sy-vline,
  WA_MRP_REQ_NOTE-MRPAREA, sy-vline,
  WA_MRP_REQ_NOTE-MRPPLANNINGSEGMENTTYPE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MRP_REQ_NOTE 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_MRP_REQ_NOTE 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_MRP_REQ_NOTE INTO WA_MRP_REQ_NOTE.


*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 MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_MRP_REQ_NOTE-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MRP_REQ_NOTE-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VENDOR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MRP_REQ_NOTE-VENDOR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MRP_REQ_NOTE-VENDOR.
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_MRP_REQ_NOTE_STR, 
MANDT TYPE STRING,
REQUEST_ID TYPE STRING,
CREATEDON TYPE STRING,
CRENAM TYPE STRING,
UPDATEDON TYPE STRING,
UPDNAM TYPE STRING,
MATNR TYPE STRING,
TYPE TYPE STRING,
MRPPLANT TYPE STRING,
MRPAREA TYPE STRING,
MRPPLANNINGSEGMENTTYPE TYPE STRING,
MRPPLANNINGSEGMENTNUMBER TYPE STRING,
MRPELEMENT TYPE STRING,
MRPELEMENTITEM TYPE STRING,
MRPELEMENTSCHEDULELINE TYPE STRING,
STATUS TYPE STRING,
VENDORSTATUS TYPE STRING,
VENDOR TYPE STRING,
VENDORPLANT TYPE STRING,
MATERIALGOODSRECEIPTDURATION TYPE STRING,
NOTE TYPE STRING,
MRPCRSTATE TYPE STRING,
DISTRIBUTEDON TYPE STRING,
ATTACHMENT TYPE STRING,
PRIORITYCODE TYPE STRING,
REASONCODE TYPE STRING,
REJECTIONCODE TYPE STRING,
COSTOFCHANGE TYPE STRING,
CURRENCYKEY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MRP_REQ_NOTE_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_MRP_REQ_NOTE_STR-MANDT sy-vline 
WA_MRP_REQ_NOTE_STR-REQUEST_ID sy-vline 
WA_MRP_REQ_NOTE_STR-CREATEDON sy-vline 
WA_MRP_REQ_NOTE_STR-CRENAM sy-vline 
WA_MRP_REQ_NOTE_STR-UPDATEDON sy-vline 
WA_MRP_REQ_NOTE_STR-UPDNAM sy-vline 
WA_MRP_REQ_NOTE_STR-MATNR sy-vline 
WA_MRP_REQ_NOTE_STR-TYPE sy-vline 
WA_MRP_REQ_NOTE_STR-MRPPLANT sy-vline 
WA_MRP_REQ_NOTE_STR-MRPAREA sy-vline 
WA_MRP_REQ_NOTE_STR-MRPPLANNINGSEGMENTTYPE sy-vline 
WA_MRP_REQ_NOTE_STR-MRPPLANNINGSEGMENTNUMBER sy-vline 
WA_MRP_REQ_NOTE_STR-MRPELEMENT sy-vline 
WA_MRP_REQ_NOTE_STR-MRPELEMENTITEM sy-vline 
WA_MRP_REQ_NOTE_STR-MRPELEMENTSCHEDULELINE sy-vline 
WA_MRP_REQ_NOTE_STR-STATUS sy-vline 
WA_MRP_REQ_NOTE_STR-VENDORSTATUS sy-vline 
WA_MRP_REQ_NOTE_STR-VENDOR sy-vline 
WA_MRP_REQ_NOTE_STR-VENDORPLANT sy-vline 
WA_MRP_REQ_NOTE_STR-MATERIALGOODSRECEIPTDURATION sy-vline 
WA_MRP_REQ_NOTE_STR-NOTE sy-vline 
WA_MRP_REQ_NOTE_STR-MRPCRSTATE sy-vline 
WA_MRP_REQ_NOTE_STR-DISTRIBUTEDON sy-vline 
WA_MRP_REQ_NOTE_STR-ATTACHMENT sy-vline 
WA_MRP_REQ_NOTE_STR-PRIORITYCODE sy-vline 
WA_MRP_REQ_NOTE_STR-REASONCODE sy-vline 
WA_MRP_REQ_NOTE_STR-REJECTIONCODE sy-vline 
WA_MRP_REQ_NOTE_STR-COSTOFCHANGE sy-vline 
WA_MRP_REQ_NOTE_STR-CURRENCYKEY sy-vline      INTO ld_text SEPARATED BY SPACE.

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