ABAP Select data from SAP table V_MRP_MATERIALS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM V_MRP_MATERIALS
*  INTO TABLE @DATA(IT_V_MRP_MATERIALS2).
*--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_V_MRP_MATERIALS INDEX 1 INTO DATA(WA_V_MRP_MATERIALS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<V_MRP_MATERIALS>-MANDT = 1.
<V_MRP_MATERIALS>-MRPPLANNINGSEGMENTTYPE = 1.
<V_MRP_MATERIALS>-MRPPLANNINGSEGMENTNUMBER = 1.
<V_MRP_MATERIALS>-MRPPLANNINGSEGMENTID = 1.
<V_MRP_MATERIALS>-MRPPLANNINGSEGMENTITEM = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_V_MRP_MATERIALS-MATERIALSHORTAGEPROFILE, sy-vline,
  WA_V_MRP_MATERIALS-MRPAVAILABLESTOCKQUANTITY, sy-vline,
  WA_V_MRP_MATERIALS-MATERIAL, sy-vline,
  WA_V_MRP_MATERIALS-MRPAREA, sy-vline,
  WA_V_MRP_MATERIALS-MRPPLANT, sy-vline,
  WA_V_MRP_MATERIALS-MRPGROUP, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_V_MRP_MATERIALS 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_V_MRP_MATERIALS 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_V_MRP_MATERIALS INTO WA_V_MRP_MATERIALS.


*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 MATERIAL
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_V_MRP_MATERIALS-MATERIAL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_MRP_MATERIALS-MATERIAL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MATERIALBASEUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_V_MRP_MATERIALS-MATERIALBASEUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_MRP_MATERIALS-MATERIALBASEUNIT.
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_V_MRP_MATERIALS_STR, 
MANDT TYPE STRING,
MRPPLANNINGSEGMENTTYPE TYPE STRING,
MRPPLANNINGSEGMENTNUMBER TYPE STRING,
MRPPLANNINGSEGMENTID TYPE STRING,
MRPPLANNINGSEGMENTITEM TYPE STRING,
MATERIALSHORTAGEPROFILE TYPE STRING,
MRPAVAILABLESTOCKQUANTITY TYPE STRING,
MATERIAL TYPE STRING,
MRPAREA TYPE STRING,
MRPPLANT TYPE STRING,
MRPGROUP TYPE STRING,
MRPCONTROLLER TYPE STRING,
MRPTYPE TYPE STRING,
MATERIALGROUP TYPE STRING,
PURCHASINGGROUP TYPE STRING,
MATERIALPROCUREMENTCATEGORY TYPE STRING,
MATERIALTYPE TYPE STRING,
MATERIALBASEUNIT TYPE STRING,
QUANTITYPRECISION TYPE STRING,
TARGETQUANTITYUNITDISPLAYDCMLS TYPE STRING,
MATERIALABCCLASSIFICATION TYPE STRING,
MRPSAFETYDURATION TYPE STRING,
MRPSAFETYDURATIONENDDATE TYPE STRING,
PLANNINGTIMEFENCEINDAYS TYPE STRING,
MATERIALSAFETYSTOCKQTY TYPE STRING,
MATERIALPLANNEDPRODUCTIONDURN TYPE STRING,
MATERIALPLANNEDDELIVERYDURN TYPE STRING,
MATERIALGOODSRECEIPTDURATION TYPE STRING,
TOTALREPLENISHMENTLEADDURATION TYPE STRING,
TOTALREPLNMTLEADDURNENDDATE TYPE STRING,
MATERIALREPLNMTLEADDURNENDDATE TYPE STRING,
MANUALPLANNINGHORIZONENDDATE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_V_MRP_MATERIALS_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_V_MRP_MATERIALS_STR-MANDT sy-vline 
WA_V_MRP_MATERIALS_STR-MRPPLANNINGSEGMENTTYPE sy-vline 
WA_V_MRP_MATERIALS_STR-MRPPLANNINGSEGMENTNUMBER sy-vline 
WA_V_MRP_MATERIALS_STR-MRPPLANNINGSEGMENTID sy-vline 
WA_V_MRP_MATERIALS_STR-MRPPLANNINGSEGMENTITEM sy-vline 
WA_V_MRP_MATERIALS_STR-MATERIALSHORTAGEPROFILE sy-vline 
WA_V_MRP_MATERIALS_STR-MRPAVAILABLESTOCKQUANTITY sy-vline 
WA_V_MRP_MATERIALS_STR-MATERIAL sy-vline 
WA_V_MRP_MATERIALS_STR-MRPAREA sy-vline 
WA_V_MRP_MATERIALS_STR-MRPPLANT sy-vline 
WA_V_MRP_MATERIALS_STR-MRPGROUP sy-vline 
WA_V_MRP_MATERIALS_STR-MRPCONTROLLER sy-vline 
WA_V_MRP_MATERIALS_STR-MRPTYPE sy-vline 
WA_V_MRP_MATERIALS_STR-MATERIALGROUP sy-vline 
WA_V_MRP_MATERIALS_STR-PURCHASINGGROUP sy-vline 
WA_V_MRP_MATERIALS_STR-MATERIALPROCUREMENTCATEGORY sy-vline 
WA_V_MRP_MATERIALS_STR-MATERIALTYPE sy-vline 
WA_V_MRP_MATERIALS_STR-MATERIALBASEUNIT sy-vline 
WA_V_MRP_MATERIALS_STR-QUANTITYPRECISION sy-vline 
WA_V_MRP_MATERIALS_STR-TARGETQUANTITYUNITDISPLAYDCMLS sy-vline 
WA_V_MRP_MATERIALS_STR-MATERIALABCCLASSIFICATION sy-vline 
WA_V_MRP_MATERIALS_STR-MRPSAFETYDURATION sy-vline 
WA_V_MRP_MATERIALS_STR-MRPSAFETYDURATIONENDDATE sy-vline 
WA_V_MRP_MATERIALS_STR-PLANNINGTIMEFENCEINDAYS sy-vline 
WA_V_MRP_MATERIALS_STR-MATERIALSAFETYSTOCKQTY sy-vline 
WA_V_MRP_MATERIALS_STR-MATERIALPLANNEDPRODUCTIONDURN sy-vline 
WA_V_MRP_MATERIALS_STR-MATERIALPLANNEDDELIVERYDURN sy-vline 
WA_V_MRP_MATERIALS_STR-MATERIALGOODSRECEIPTDURATION sy-vline 
WA_V_MRP_MATERIALS_STR-TOTALREPLENISHMENTLEADDURATION sy-vline 
WA_V_MRP_MATERIALS_STR-TOTALREPLNMTLEADDURNENDDATE sy-vline 
WA_V_MRP_MATERIALS_STR-MATERIALREPLNMTLEADDURNENDDATE sy-vline 
WA_V_MRP_MATERIALS_STR-MANUALPLANNINGHORIZONENDDATE sy-vline      INTO ld_text SEPARATED BY SPACE.

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