ABAP Select data from SAP table MMPUR_DOCLST_REQITEM into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MMPUR_DOCLST_REQITEM
*  INTO TABLE @DATA(IT_MMPUR_DOCLST_REQITEM2).
*--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_MMPUR_DOCLST_REQITEM INDEX 1 INTO DATA(WA_MMPUR_DOCLST_REQITEM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MMPUR_DOCLST_REQITEM>-GENERATED_ID = 1.
<MMPUR_DOCLST_REQITEM>-PURCHASEREQUISITION = 1.
<MMPUR_DOCLST_REQITEM>-PURCHASEREQUISITIONITEM = 1.
<MMPUR_DOCLST_REQITEM>-PURCHASINGDOCUMENT = 1.
<MMPUR_DOCLST_REQITEM>-PURCHASINGDOCUMENTITEM = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MMPUR_DOCLST_REQITEM-PURCHASEREQUISITIONPROCESSSTAT, sy-vline,
  WA_MMPUR_DOCLST_REQITEM-PURCHASINGDOCUMENTTYPE, sy-vline,
  WA_MMPUR_DOCLST_REQITEM-PURGDOCUMENTTYPEDESCRIPTION, sy-vline,
  WA_MMPUR_DOCLST_REQITEM-PURCHASINGDOCUMENTCATEGORY, sy-vline,
  WA_MMPUR_DOCLST_REQITEM-CNT, sy-vline,
  WA_MMPUR_DOCLST_REQITEM-CNTB, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MMPUR_DOCLST_REQITEM 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_MMPUR_DOCLST_REQITEM 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_MMPUR_DOCLST_REQITEM INTO WA_MMPUR_DOCLST_REQITEM.


*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_MMPUR_DOCLST_REQITEM-PURCHASEREQUISITION
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MMPUR_DOCLST_REQITEM-PURCHASEREQUISITION.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

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

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

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

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

*Conversion exit ALPHA, internal->external for field SALESORDER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MMPUR_DOCLST_REQITEM-SALESORDER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MMPUR_DOCLST_REQITEM-SALESORDER.
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_MMPUR_DOCLST_REQITEM_STR, 
GENERATED_ID TYPE STRING,
PURCHASEREQUISITION TYPE STRING,
PURCHASEREQUISITIONITEM TYPE STRING,
PURCHASINGDOCUMENT TYPE STRING,
PURCHASINGDOCUMENTITEM TYPE STRING,
PURCHASEREQUISITIONPROCESSSTAT TYPE STRING,
PURCHASINGDOCUMENTTYPE TYPE STRING,
PURGDOCUMENTTYPEDESCRIPTION TYPE STRING,
PURCHASINGDOCUMENTCATEGORY TYPE STRING,
CNT TYPE STRING,
CNTB TYPE STRING,
PURCHASINGDOCUMENTITEMCATEGORY TYPE STRING,
PURCHASINGGROUP TYPE STRING,
PURCHASINGGROUPNAME TYPE STRING,
PURCHASINGORGANIZATION TYPE STRING,
PURCHASINGORGANISATIONNAME TYPE STRING,
FIXEDVENDOR TYPE STRING,
REQUISITIONERUSER TYPE STRING,
CREATEDBYUSER TYPE STRING,
REQUISITIONDATE TYPE STRING,
PURCHASINGINFORECORD TYPE STRING,
SUPPLIER TYPE STRING,
ISDELETED TYPE STRING,
MATERIALGROUP TYPE STRING,
MATERIAL TYPE STRING,
MANUFACTURERMATERIAL TYPE STRING,
MATERIALNAME TYPE STRING,
PURCHASEREQUISIONITEMQUANTITYU TYPE STRING,
PURCHASEREQUISITIONTITEMQUANTI TYPE STRING,
CREATEDBYUSERFULLNAME TYPE STRING,
SUPPLIERNAME TYPE STRING,
PRICEUNIT TYPE STRING,
SUPPLYINGPLANT TYPE STRING,
SUPPLIERSORTFIELD TYPE STRING,
STATUS TYPE STRING,
STATUSTEXT TYPE STRING,
PURCHASEREQUISITIONITEMTEXT TYPE STRING,
UID TYPE STRING,
CURRENCY TYPE STRING,
PLANT TYPE STRING,
PLANTNAME TYPE STRING,
DELIVERYDATE TYPE STRING,
OPEXTERNALPROCESSINGPRICE TYPE STRING,
ORDEREDQUANTITY TYPE STRING,
MATERIALGROUPNAME TYPE STRING,
WEIGHTEDRELEVANCE TYPE STRING,
SERVICEPERFORMER TYPE STRING,
ACCTASSIGNMENTCATEGORY TYPE STRING,
WORKITEM TYPE STRING,
COSTCENTER TYPE STRING,
WBSELEMENTINTERNALID TYPE STRING,
WBSELEMENTEXTERNALID TYPE STRING,
SALESORDER TYPE STRING,
SUPPLIERADDRESSCOUNTRY TYPE STRING,
SUPPLIERADDRESSCOUNTRYNAME TYPE STRING,
SUPPLIERADDRESSCITY TYPE STRING,
COSTCENTERNAME TYPE STRING,
CONTROLLINGAREA TYPE STRING,
WORKPACKAGEFULLNAME TYPE STRING,
SERVICEPERFORMERNAME TYPE STRING,
ACCTASSIGNMENTCATEGORYNAME TYPE STRING,
PURCHASEORDERITEMCATEGORYNAME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MMPUR_DOCLST_REQITEM_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_MMPUR_DOCLST_REQITEM_STR-GENERATED_ID sy-vline 
WA_MMPUR_DOCLST_REQITEM_STR-PURCHASEREQUISITION sy-vline 
WA_MMPUR_DOCLST_REQITEM_STR-PURCHASEREQUISITIONITEM sy-vline 
WA_MMPUR_DOCLST_REQITEM_STR-PURCHASINGDOCUMENT sy-vline 
WA_MMPUR_DOCLST_REQITEM_STR-PURCHASINGDOCUMENTITEM sy-vline 
WA_MMPUR_DOCLST_REQITEM_STR-PURCHASEREQUISITIONPROCESSSTAT sy-vline 
WA_MMPUR_DOCLST_REQITEM_STR-PURCHASINGDOCUMENTTYPE sy-vline 
WA_MMPUR_DOCLST_REQITEM_STR-PURGDOCUMENTTYPEDESCRIPTION sy-vline 
WA_MMPUR_DOCLST_REQITEM_STR-PURCHASINGDOCUMENTCATEGORY sy-vline 
WA_MMPUR_DOCLST_REQITEM_STR-CNT sy-vline 
WA_MMPUR_DOCLST_REQITEM_STR-CNTB sy-vline 
WA_MMPUR_DOCLST_REQITEM_STR-PURCHASINGDOCUMENTITEMCATEGORY sy-vline 
WA_MMPUR_DOCLST_REQITEM_STR-PURCHASINGGROUP sy-vline 
WA_MMPUR_DOCLST_REQITEM_STR-PURCHASINGGROUPNAME sy-vline 
WA_MMPUR_DOCLST_REQITEM_STR-PURCHASINGORGANIZATION sy-vline 
WA_MMPUR_DOCLST_REQITEM_STR-PURCHASINGORGANISATIONNAME sy-vline 
WA_MMPUR_DOCLST_REQITEM_STR-FIXEDVENDOR sy-vline 
WA_MMPUR_DOCLST_REQITEM_STR-REQUISITIONERUSER sy-vline 
WA_MMPUR_DOCLST_REQITEM_STR-CREATEDBYUSER sy-vline 
WA_MMPUR_DOCLST_REQITEM_STR-REQUISITIONDATE sy-vline 
WA_MMPUR_DOCLST_REQITEM_STR-PURCHASINGINFORECORD sy-vline 
WA_MMPUR_DOCLST_REQITEM_STR-SUPPLIER sy-vline 
WA_MMPUR_DOCLST_REQITEM_STR-ISDELETED sy-vline 
WA_MMPUR_DOCLST_REQITEM_STR-MATERIALGROUP sy-vline 
WA_MMPUR_DOCLST_REQITEM_STR-MATERIAL sy-vline 
WA_MMPUR_DOCLST_REQITEM_STR-MANUFACTURERMATERIAL sy-vline 
WA_MMPUR_DOCLST_REQITEM_STR-MATERIALNAME sy-vline 
WA_MMPUR_DOCLST_REQITEM_STR-PURCHASEREQUISIONITEMQUANTITYU sy-vline 
WA_MMPUR_DOCLST_REQITEM_STR-PURCHASEREQUISITIONTITEMQUANTI sy-vline 
WA_MMPUR_DOCLST_REQITEM_STR-CREATEDBYUSERFULLNAME sy-vline 
WA_MMPUR_DOCLST_REQITEM_STR-SUPPLIERNAME sy-vline 
WA_MMPUR_DOCLST_REQITEM_STR-PRICEUNIT sy-vline 
WA_MMPUR_DOCLST_REQITEM_STR-SUPPLYINGPLANT sy-vline 
WA_MMPUR_DOCLST_REQITEM_STR-SUPPLIERSORTFIELD sy-vline 
WA_MMPUR_DOCLST_REQITEM_STR-STATUS sy-vline 
WA_MMPUR_DOCLST_REQITEM_STR-STATUSTEXT sy-vline 
WA_MMPUR_DOCLST_REQITEM_STR-PURCHASEREQUISITIONITEMTEXT sy-vline 
WA_MMPUR_DOCLST_REQITEM_STR-UID sy-vline 
WA_MMPUR_DOCLST_REQITEM_STR-CURRENCY sy-vline 
WA_MMPUR_DOCLST_REQITEM_STR-PLANT sy-vline 
WA_MMPUR_DOCLST_REQITEM_STR-PLANTNAME sy-vline 
WA_MMPUR_DOCLST_REQITEM_STR-DELIVERYDATE sy-vline 
WA_MMPUR_DOCLST_REQITEM_STR-OPEXTERNALPROCESSINGPRICE sy-vline 
WA_MMPUR_DOCLST_REQITEM_STR-ORDEREDQUANTITY sy-vline 
WA_MMPUR_DOCLST_REQITEM_STR-MATERIALGROUPNAME sy-vline 
WA_MMPUR_DOCLST_REQITEM_STR-WEIGHTEDRELEVANCE sy-vline 
WA_MMPUR_DOCLST_REQITEM_STR-SERVICEPERFORMER sy-vline 
WA_MMPUR_DOCLST_REQITEM_STR-ACCTASSIGNMENTCATEGORY sy-vline 
WA_MMPUR_DOCLST_REQITEM_STR-WORKITEM sy-vline 
WA_MMPUR_DOCLST_REQITEM_STR-COSTCENTER sy-vline 
WA_MMPUR_DOCLST_REQITEM_STR-WBSELEMENTINTERNALID sy-vline 
WA_MMPUR_DOCLST_REQITEM_STR-WBSELEMENTEXTERNALID sy-vline 
WA_MMPUR_DOCLST_REQITEM_STR-SALESORDER sy-vline 
WA_MMPUR_DOCLST_REQITEM_STR-SUPPLIERADDRESSCOUNTRY sy-vline 
WA_MMPUR_DOCLST_REQITEM_STR-SUPPLIERADDRESSCOUNTRYNAME sy-vline 
WA_MMPUR_DOCLST_REQITEM_STR-SUPPLIERADDRESSCITY sy-vline 
WA_MMPUR_DOCLST_REQITEM_STR-COSTCENTERNAME sy-vline 
WA_MMPUR_DOCLST_REQITEM_STR-CONTROLLINGAREA sy-vline 
WA_MMPUR_DOCLST_REQITEM_STR-WORKPACKAGEFULLNAME sy-vline 
WA_MMPUR_DOCLST_REQITEM_STR-SERVICEPERFORMERNAME sy-vline 
WA_MMPUR_DOCLST_REQITEM_STR-ACCTASSIGNMENTCATEGORYNAME sy-vline 
WA_MMPUR_DOCLST_REQITEM_STR-PURCHASEORDERITEMCATEGORYNAME sy-vline      INTO ld_text SEPARATED BY SPACE.

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