ABAP Select data from SAP table MMPUR_DOCLST_GRITEM 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_GRITEM 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_GRITEM. 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_GRITEM 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_GRITEM TYPE STANDARD TABLE OF MMPUR_DOCLST_GRITEM,
      WA_MMPUR_DOCLST_GRITEM TYPE MMPUR_DOCLST_GRITEM,
      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_GRITEM> TYPE MMPUR_DOCLST_GRITEM.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MMPUR_DOCLST_GRITEM
*  INTO TABLE @DATA(IT_MMPUR_DOCLST_GRITEM2).
*--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_GRITEM INDEX 1 INTO DATA(WA_MMPUR_DOCLST_GRITEM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MMPUR_DOCLST_GRITEM>-GENERATED_ID = 1.
<MMPUR_DOCLST_GRITEM>-PURCHASINGDOCUMENT = 1.
<MMPUR_DOCLST_GRITEM>-PURCHASINGDOCUMENTITEM = 1.
<MMPUR_DOCLST_GRITEM>-MATERIALDOCUMENTYEAR = 1.
<MMPUR_DOCLST_GRITEM>-GOODSMOVEMENTTYPE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MMPUR_DOCLST_GRITEM-PURCHASEORDER, sy-vline,
  WA_MMPUR_DOCLST_GRITEM-PURCHASEORDERITEM, sy-vline,
  WA_MMPUR_DOCLST_GRITEM-PURCHASEORDERITEMCATEGORY, sy-vline,
  WA_MMPUR_DOCLST_GRITEM-PURCHASEORDERTYPE, sy-vline,
  WA_MMPUR_DOCLST_GRITEM-MATERIAL, sy-vline,
  WA_MMPUR_DOCLST_GRITEM-MANUFACTURERMATERIAL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MMPUR_DOCLST_GRITEM 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_GRITEM 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_GRITEM INTO WA_MMPUR_DOCLST_GRITEM.


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

*Conversion exit GJAHR, internal->external for field MATERIALDOCUMENTYEAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_MMPUR_DOCLST_GRITEM-MATERIALDOCUMENTYEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MMPUR_DOCLST_GRITEM-MATERIALDOCUMENTYEAR.
WRITE:/ 'New Value:', ld_input.

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

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

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

*Conversion exit ALPHA, internal->external for field SERVICEPERFORMER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MMPUR_DOCLST_GRITEM-SERVICEPERFORMER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MMPUR_DOCLST_GRITEM-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_GRITEM-COSTCENTER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MMPUR_DOCLST_GRITEM-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_GRITEM-SALESORDER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MMPUR_DOCLST_GRITEM-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_GRITEM_STR, 
GENERATED_ID TYPE STRING,
PURCHASINGDOCUMENT TYPE STRING,
PURCHASINGDOCUMENTITEM TYPE STRING,
MATERIALDOCUMENTYEAR TYPE STRING,
GOODSMOVEMENTTYPE TYPE STRING,
PURCHASEORDER TYPE STRING,
PURCHASEORDERITEM TYPE STRING,
PURCHASEORDERITEMCATEGORY TYPE STRING,
PURCHASEORDERTYPE TYPE STRING,
MATERIAL TYPE STRING,
MANUFACTURERMATERIAL TYPE STRING,
MATERIALGROUP TYPE STRING,
PURCHASEORDERQTY TYPE STRING,
QUANTITY TYPE STRING,
PURGORDERQUANTITYUNIT TYPE STRING,
DELIVERYDATE TYPE STRING,
POSTINGDATE TYPE STRING,
CNT TYPE STRING,
PURCHASINGGROUP TYPE STRING,
SUPPLYINGPLANT TYPE STRING,
SUPPLIER TYPE STRING,
SUPPLIERNAME TYPE STRING,
PURCHASINGORGANIZATION TYPE STRING,
PURCHASINGORGANISATIONNAME TYPE STRING,
MATERIALNAME TYPE STRING,
MATERIALGROUPNAME TYPE STRING,
STATUS TYPE STRING,
PURGDOCUMENTTYPEDESCRIPTION TYPE STRING,
STATUSDESCRIPTION TYPE STRING,
PLANT TYPE STRING,
PLANTNAME TYPE STRING,
UID TYPE STRING,
PURCHASINGDOCUMENTITEMTEXT TYPE STRING,
PURCHASINGDOCUMENTTYPE TYPE STRING,
PURCHASINGGROUPNAME TYPE STRING,
PURCHASINGDOCUMENTCATEGORY TYPE STRING,
PURCHASINGDOCUMENTCATEGORY1 TYPE STRING,
SERVICEPERFORMER TYPE STRING,
SERVICEPERFORMERNAME TYPE STRING,
ACCTASSIGNMENTCATEGORY TYPE STRING,
WBSELEMENTINTERNALID TYPE STRING,
WBSELEMENTEXTERNALID TYPE STRING,
WORKITEM TYPE STRING,
WORKITEMNAME TYPE STRING,
COSTCENTER TYPE STRING,
SALESORDER TYPE STRING,
SUPPLIERADDRESSCOUNTRY TYPE STRING,
SUPPLIERADDRESSCOUNTRYNAME TYPE STRING,
SUPPLIERADDRESSCITY TYPE STRING,
COSTCENTERNAME TYPE STRING,
CONTROLLINGAREA TYPE STRING,
WORKPACKAGEFULLNAME TYPE STRING,
ACCTASSIGNMENTCATEGORYNAME TYPE STRING,
PURCHASEORDERITEMCATEGORYNAME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MMPUR_DOCLST_GRITEM_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_GRITEM_STR-GENERATED_ID sy-vline 
WA_MMPUR_DOCLST_GRITEM_STR-PURCHASINGDOCUMENT sy-vline 
WA_MMPUR_DOCLST_GRITEM_STR-PURCHASINGDOCUMENTITEM sy-vline 
WA_MMPUR_DOCLST_GRITEM_STR-MATERIALDOCUMENTYEAR sy-vline 
WA_MMPUR_DOCLST_GRITEM_STR-GOODSMOVEMENTTYPE sy-vline 
WA_MMPUR_DOCLST_GRITEM_STR-PURCHASEORDER sy-vline 
WA_MMPUR_DOCLST_GRITEM_STR-PURCHASEORDERITEM sy-vline 
WA_MMPUR_DOCLST_GRITEM_STR-PURCHASEORDERITEMCATEGORY sy-vline 
WA_MMPUR_DOCLST_GRITEM_STR-PURCHASEORDERTYPE sy-vline 
WA_MMPUR_DOCLST_GRITEM_STR-MATERIAL sy-vline 
WA_MMPUR_DOCLST_GRITEM_STR-MANUFACTURERMATERIAL sy-vline 
WA_MMPUR_DOCLST_GRITEM_STR-MATERIALGROUP sy-vline 
WA_MMPUR_DOCLST_GRITEM_STR-PURCHASEORDERQTY sy-vline 
WA_MMPUR_DOCLST_GRITEM_STR-QUANTITY sy-vline 
WA_MMPUR_DOCLST_GRITEM_STR-PURGORDERQUANTITYUNIT sy-vline 
WA_MMPUR_DOCLST_GRITEM_STR-DELIVERYDATE sy-vline 
WA_MMPUR_DOCLST_GRITEM_STR-POSTINGDATE sy-vline 
WA_MMPUR_DOCLST_GRITEM_STR-CNT sy-vline 
WA_MMPUR_DOCLST_GRITEM_STR-PURCHASINGGROUP sy-vline 
WA_MMPUR_DOCLST_GRITEM_STR-SUPPLYINGPLANT sy-vline 
WA_MMPUR_DOCLST_GRITEM_STR-SUPPLIER sy-vline 
WA_MMPUR_DOCLST_GRITEM_STR-SUPPLIERNAME sy-vline 
WA_MMPUR_DOCLST_GRITEM_STR-PURCHASINGORGANIZATION sy-vline 
WA_MMPUR_DOCLST_GRITEM_STR-PURCHASINGORGANISATIONNAME sy-vline 
WA_MMPUR_DOCLST_GRITEM_STR-MATERIALNAME sy-vline 
WA_MMPUR_DOCLST_GRITEM_STR-MATERIALGROUPNAME sy-vline 
WA_MMPUR_DOCLST_GRITEM_STR-STATUS sy-vline 
WA_MMPUR_DOCLST_GRITEM_STR-PURGDOCUMENTTYPEDESCRIPTION sy-vline 
WA_MMPUR_DOCLST_GRITEM_STR-STATUSDESCRIPTION sy-vline 
WA_MMPUR_DOCLST_GRITEM_STR-PLANT sy-vline 
WA_MMPUR_DOCLST_GRITEM_STR-PLANTNAME sy-vline 
WA_MMPUR_DOCLST_GRITEM_STR-UID sy-vline 
WA_MMPUR_DOCLST_GRITEM_STR-PURCHASINGDOCUMENTITEMTEXT sy-vline 
WA_MMPUR_DOCLST_GRITEM_STR-PURCHASINGDOCUMENTTYPE sy-vline 
WA_MMPUR_DOCLST_GRITEM_STR-PURCHASINGGROUPNAME sy-vline 
WA_MMPUR_DOCLST_GRITEM_STR-PURCHASINGDOCUMENTCATEGORY sy-vline 
WA_MMPUR_DOCLST_GRITEM_STR-PURCHASINGDOCUMENTCATEGORY1 sy-vline 
WA_MMPUR_DOCLST_GRITEM_STR-SERVICEPERFORMER sy-vline 
WA_MMPUR_DOCLST_GRITEM_STR-SERVICEPERFORMERNAME sy-vline 
WA_MMPUR_DOCLST_GRITEM_STR-ACCTASSIGNMENTCATEGORY sy-vline 
WA_MMPUR_DOCLST_GRITEM_STR-WBSELEMENTINTERNALID sy-vline 
WA_MMPUR_DOCLST_GRITEM_STR-WBSELEMENTEXTERNALID sy-vline 
WA_MMPUR_DOCLST_GRITEM_STR-WORKITEM sy-vline 
WA_MMPUR_DOCLST_GRITEM_STR-WORKITEMNAME sy-vline 
WA_MMPUR_DOCLST_GRITEM_STR-COSTCENTER sy-vline 
WA_MMPUR_DOCLST_GRITEM_STR-SALESORDER sy-vline 
WA_MMPUR_DOCLST_GRITEM_STR-SUPPLIERADDRESSCOUNTRY sy-vline 
WA_MMPUR_DOCLST_GRITEM_STR-SUPPLIERADDRESSCOUNTRYNAME sy-vline 
WA_MMPUR_DOCLST_GRITEM_STR-SUPPLIERADDRESSCITY sy-vline 
WA_MMPUR_DOCLST_GRITEM_STR-COSTCENTERNAME sy-vline 
WA_MMPUR_DOCLST_GRITEM_STR-CONTROLLINGAREA sy-vline 
WA_MMPUR_DOCLST_GRITEM_STR-WORKPACKAGEFULLNAME sy-vline 
WA_MMPUR_DOCLST_GRITEM_STR-ACCTASSIGNMENTCATEGORYNAME sy-vline 
WA_MMPUR_DOCLST_GRITEM_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.