ABAP Select data from SAP table V_MRP_PUR_REQ 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_PUR_REQ 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_PUR_REQ. 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_PUR_REQ 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_PUR_REQ TYPE STANDARD TABLE OF V_MRP_PUR_REQ,
      WA_V_MRP_PUR_REQ TYPE V_MRP_PUR_REQ,
      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_PUR_REQ> TYPE V_MRP_PUR_REQ.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM V_MRP_PUR_REQ
*  INTO TABLE @DATA(IT_V_MRP_PUR_REQ2).
*--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_PUR_REQ INDEX 1 INTO DATA(WA_V_MRP_PUR_REQ2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<V_MRP_PUR_REQ>-MANDT = 1.
<V_MRP_PUR_REQ>-PURCHASEREQUISITION = 1.
<V_MRP_PUR_REQ>-PURCHASEREQUISITIONITEM = 1.
<V_MRP_PUR_REQ>-MATERIAL = 1.
<V_MRP_PUR_REQ>-MATERIALPROCUREMENTCATEGORY = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_V_MRP_PUR_REQ-MRPPLANT, sy-vline,
  WA_V_MRP_PUR_REQ-SUPPLYINGPLANT, sy-vline,
  WA_V_MRP_PUR_REQ-MRPCONTROLLER, sy-vline,
  WA_V_MRP_PUR_REQ-VENDOR, sy-vline,
  WA_V_MRP_PUR_REQ-VENDORISFIXED, sy-vline,
  WA_V_MRP_PUR_REQ-PURCHASEREQUISITIONISFIXED, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_V_MRP_PUR_REQ 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_PUR_REQ 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_PUR_REQ INTO WA_V_MRP_PUR_REQ.


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

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

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

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

*Conversion exit CUNIT, internal->external for field PURCHASEREQUISITIONUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_V_MRP_PUR_REQ-PURCHASEREQUISITIONUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_MRP_PUR_REQ-PURCHASEREQUISITIONUNIT.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit AUART, internal->external for field SALESDOCUMENTTYPE
CALL FUNCTION 'CONVERSION_EXIT_AUART_OUTPUT'
  EXPORTING
    input =                      WA_V_MRP_PUR_REQ-SALESDOCUMENTTYPE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_MRP_PUR_REQ-SALESDOCUMENTTYPE.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit ABPSP, internal->external for field WBSELEMENTINTERNALID
CALL FUNCTION 'CONVERSION_EXIT_ABPSP_OUTPUT'
  EXPORTING
    input =                      WA_V_MRP_PUR_REQ-WBSELEMENTINTERNALID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_MRP_PUR_REQ-WBSELEMENTINTERNALID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ABPSN, internal->external for field WBSELEMENT
CALL FUNCTION 'CONVERSION_EXIT_ABPSN_OUTPUT'
  EXPORTING
    input =                      WA_V_MRP_PUR_REQ-WBSELEMENT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_MRP_PUR_REQ-WBSELEMENT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit KONPD, internal->external for field PROJECTINTERNALID
CALL FUNCTION 'CONVERSION_EXIT_KONPD_OUTPUT'
  EXPORTING
    input =                      WA_V_MRP_PUR_REQ-PROJECTINTERNALID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_MRP_PUR_REQ-PROJECTINTERNALID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ABPSN, internal->external for field PROJECT
CALL FUNCTION 'CONVERSION_EXIT_ABPSN_OUTPUT'
  EXPORTING
    input =                      WA_V_MRP_PUR_REQ-PROJECT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_MRP_PUR_REQ-PROJECT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PURCHASEOUTLINEAGREEMENT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_V_MRP_PUR_REQ-PURCHASEOUTLINEAGREEMENT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_MRP_PUR_REQ-PURCHASEOUTLINEAGREEMENT.
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_PUR_REQ_STR, 
MANDT TYPE STRING,
PURCHASEREQUISITION TYPE STRING,
PURCHASEREQUISITIONITEM TYPE STRING,
MATERIAL TYPE STRING,
MATERIALPROCUREMENTCATEGORY TYPE STRING,
MRPPLANT TYPE STRING,
SUPPLYINGPLANT TYPE STRING,
MRPCONTROLLER TYPE STRING,
VENDOR TYPE STRING,
VENDORISFIXED TYPE STRING,
PURCHASEREQUISITIONISFIXED TYPE STRING,
PURCHASINGINFORECORD TYPE STRING,
PURCHASINGORGANIZATION TYPE STRING,
PURCHASINGGROUP TYPE STRING,
TOTALQUANTITY TYPE STRING,
ORDEREDQUANTITY TYPE STRING,
OPENQUANTITY TYPE STRING,
PURCHASEREQUISITIONUNIT TYPE STRING,
VENDORMATERIAL TYPE STRING,
INVENTORYSPECIALSTOCK TYPE STRING,
SALESDOCUMENT TYPE STRING,
SALESDOCUMENTITEM TYPE STRING,
SALESDOCUMENTTYPE TYPE STRING,
SALESDOCUMENTITEMMATERIAL TYPE STRING,
CUSTOMER TYPE STRING,
WBSELEMENTINTERNALID TYPE STRING,
WBSELEMENT TYPE STRING,
WBSDESCRIPTION TYPE STRING,
WBSRESPONSIBLEPERSON TYPE STRING,
WBSRESPONSIBLEPERSONNAME TYPE STRING,
PROJECTINTERNALID TYPE STRING,
PROJECT TYPE STRING,
PROJECTDESCRIPTION TYPE STRING,
MATERIALPLANNEDDELIVERYDURN TYPE STRING,
MATERIALGOODSRECEIPTDURATION TYPE STRING,
RELEASEDATE TYPE STRING,
DELIVERYDATE TYPE STRING,
PURCHASEOUTLINEAGREEMENT TYPE STRING,
PURCHASEOUTLINEAGREEMENTITEM TYPE STRING,
STANDARDPURCHASEORDERQUANTITY TYPE STRING,
MAXIMUMPURCHASEORDERQUANTITY TYPE STRING,
MINIMUMPURCHASEORDERQUANTITY TYPE STRING,
MATERIALSTAGINGDURATION TYPE STRING,
PURCHASEORDERROUNDINGPROFILE TYPE STRING,
MATERIALFIXEDLOTSIZEQUANTITY TYPE STRING,
MATERIALMINLOTSIZEQUANTITY TYPE STRING,
MATERIALMAXLOTSIZEQUANTITY TYPE STRING,
MATERIALROUNDINGQUANTITY TYPE STRING,
MATERIALROUNDINGPROFILE TYPE STRING,
QUICKVIEWCATEGORY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_V_MRP_PUR_REQ_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_PUR_REQ_STR-MANDT sy-vline 
WA_V_MRP_PUR_REQ_STR-PURCHASEREQUISITION sy-vline 
WA_V_MRP_PUR_REQ_STR-PURCHASEREQUISITIONITEM sy-vline 
WA_V_MRP_PUR_REQ_STR-MATERIAL sy-vline 
WA_V_MRP_PUR_REQ_STR-MATERIALPROCUREMENTCATEGORY sy-vline 
WA_V_MRP_PUR_REQ_STR-MRPPLANT sy-vline 
WA_V_MRP_PUR_REQ_STR-SUPPLYINGPLANT sy-vline 
WA_V_MRP_PUR_REQ_STR-MRPCONTROLLER sy-vline 
WA_V_MRP_PUR_REQ_STR-VENDOR sy-vline 
WA_V_MRP_PUR_REQ_STR-VENDORISFIXED sy-vline 
WA_V_MRP_PUR_REQ_STR-PURCHASEREQUISITIONISFIXED sy-vline 
WA_V_MRP_PUR_REQ_STR-PURCHASINGINFORECORD sy-vline 
WA_V_MRP_PUR_REQ_STR-PURCHASINGORGANIZATION sy-vline 
WA_V_MRP_PUR_REQ_STR-PURCHASINGGROUP sy-vline 
WA_V_MRP_PUR_REQ_STR-TOTALQUANTITY sy-vline 
WA_V_MRP_PUR_REQ_STR-ORDEREDQUANTITY sy-vline 
WA_V_MRP_PUR_REQ_STR-OPENQUANTITY sy-vline 
WA_V_MRP_PUR_REQ_STR-PURCHASEREQUISITIONUNIT sy-vline 
WA_V_MRP_PUR_REQ_STR-VENDORMATERIAL sy-vline 
WA_V_MRP_PUR_REQ_STR-INVENTORYSPECIALSTOCK sy-vline 
WA_V_MRP_PUR_REQ_STR-SALESDOCUMENT sy-vline 
WA_V_MRP_PUR_REQ_STR-SALESDOCUMENTITEM sy-vline 
WA_V_MRP_PUR_REQ_STR-SALESDOCUMENTTYPE sy-vline 
WA_V_MRP_PUR_REQ_STR-SALESDOCUMENTITEMMATERIAL sy-vline 
WA_V_MRP_PUR_REQ_STR-CUSTOMER sy-vline 
WA_V_MRP_PUR_REQ_STR-WBSELEMENTINTERNALID sy-vline 
WA_V_MRP_PUR_REQ_STR-WBSELEMENT sy-vline 
WA_V_MRP_PUR_REQ_STR-WBSDESCRIPTION sy-vline 
WA_V_MRP_PUR_REQ_STR-WBSRESPONSIBLEPERSON sy-vline 
WA_V_MRP_PUR_REQ_STR-WBSRESPONSIBLEPERSONNAME sy-vline 
WA_V_MRP_PUR_REQ_STR-PROJECTINTERNALID sy-vline 
WA_V_MRP_PUR_REQ_STR-PROJECT sy-vline 
WA_V_MRP_PUR_REQ_STR-PROJECTDESCRIPTION sy-vline 
WA_V_MRP_PUR_REQ_STR-MATERIALPLANNEDDELIVERYDURN sy-vline 
WA_V_MRP_PUR_REQ_STR-MATERIALGOODSRECEIPTDURATION sy-vline 
WA_V_MRP_PUR_REQ_STR-RELEASEDATE sy-vline 
WA_V_MRP_PUR_REQ_STR-DELIVERYDATE sy-vline 
WA_V_MRP_PUR_REQ_STR-PURCHASEOUTLINEAGREEMENT sy-vline 
WA_V_MRP_PUR_REQ_STR-PURCHASEOUTLINEAGREEMENTITEM sy-vline 
WA_V_MRP_PUR_REQ_STR-STANDARDPURCHASEORDERQUANTITY sy-vline 
WA_V_MRP_PUR_REQ_STR-MAXIMUMPURCHASEORDERQUANTITY sy-vline 
WA_V_MRP_PUR_REQ_STR-MINIMUMPURCHASEORDERQUANTITY sy-vline 
WA_V_MRP_PUR_REQ_STR-MATERIALSTAGINGDURATION sy-vline 
WA_V_MRP_PUR_REQ_STR-PURCHASEORDERROUNDINGPROFILE sy-vline 
WA_V_MRP_PUR_REQ_STR-MATERIALFIXEDLOTSIZEQUANTITY sy-vline 
WA_V_MRP_PUR_REQ_STR-MATERIALMINLOTSIZEQUANTITY sy-vline 
WA_V_MRP_PUR_REQ_STR-MATERIALMAXLOTSIZEQUANTITY sy-vline 
WA_V_MRP_PUR_REQ_STR-MATERIALROUNDINGQUANTITY sy-vline 
WA_V_MRP_PUR_REQ_STR-MATERIALROUNDINGPROFILE sy-vline 
WA_V_MRP_PUR_REQ_STR-QUICKVIEWCATEGORY sy-vline      INTO ld_text SEPARATED BY SPACE.

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