ABAP Select data from SAP table MMPUR_SSP_REQN_ITEM into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP MMPUR_SSP_REQN_ITEM 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_SSP_REQN_ITEM. 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_SSP_REQN_ITEM 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_SSP_REQN_ITEM TYPE STANDARD TABLE OF MMPUR_SSP_REQN_ITEM,
      WA_MMPUR_SSP_REQN_ITEM TYPE MMPUR_SSP_REQN_ITEM,
      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_SSP_REQN_ITEM> TYPE MMPUR_SSP_REQN_ITEM.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MMPUR_SSP_REQN_ITEM
*  INTO TABLE @DATA(IT_MMPUR_SSP_REQN_ITEM2).
*--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_SSP_REQN_ITEM INDEX 1 INTO DATA(WA_MMPUR_SSP_REQN_ITEM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MMPUR_SSP_REQN_ITEM>-PURCHASEREQUISITION = 1.
<MMPUR_SSP_REQN_ITEM>-PURCHASEREQUISITIONITEM = 1.
<MMPUR_SSP_REQN_ITEM>-PURCHASEREQUISITIONTYPE = 1.
<MMPUR_SSP_REQN_ITEM>-PURCHASINGDOCUMENTITEMCATEGORY = 1.
<MMPUR_SSP_REQN_ITEM>-PURCHASEREQUISITIONITEMTEXT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MMPUR_SSP_REQN_ITEM-MATERIAL, sy-vline,
  WA_MMPUR_SSP_REQN_ITEM-MATERIALGROUP, sy-vline,
  WA_MMPUR_SSP_REQN_ITEM-PURCHASINGDOCUMENTCATEGORY, sy-vline,
  WA_MMPUR_SSP_REQN_ITEM-REQUESTEDQUANTITY, sy-vline,
  WA_MMPUR_SSP_REQN_ITEM-BASEUNIT, sy-vline,
  WA_MMPUR_SSP_REQN_ITEM-PURCHASEREQUISITIONPRICE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MMPUR_SSP_REQN_ITEM 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_SSP_REQN_ITEM 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_SSP_REQN_ITEM INTO WA_MMPUR_SSP_REQN_ITEM.


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

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

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

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

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

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

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

*Conversion exit ALPHA, internal->external for field PURCHASEREQUISITION
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MMPUR_SSP_REQN_ITEM-PURCHASEREQUISITION
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MMPUR_SSP_REQN_ITEM-PURCHASEREQUISITION.
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_SSP_REQN_ITEM_STR, 
PURCHASEREQUISITION TYPE STRING,
PURCHASEREQUISITIONITEM TYPE STRING,
PURCHASEREQUISITIONTYPE TYPE STRING,
PURCHASINGDOCUMENTITEMCATEGORY TYPE STRING,
PURCHASEREQUISITIONITEMTEXT TYPE STRING,
MATERIAL TYPE STRING,
MATERIALGROUP TYPE STRING,
PURCHASINGDOCUMENTCATEGORY TYPE STRING,
REQUESTEDQUANTITY TYPE STRING,
BASEUNIT TYPE STRING,
PURCHASEREQUISITIONPRICE TYPE STRING,
PURREQNPRICEQUANTITY TYPE STRING,
PURCHASINGORGANIZATION TYPE STRING,
PURCHASINGGROUP TYPE STRING,
PLANT TYPE STRING,
DELIVERYDATE TYPE STRING,
CREATIONDATE TYPE STRING,
PROCESSINGSTATUS TYPE STRING,
PURCHASINGINFORECORD TYPE STRING,
SUPPLIER TYPE STRING,
ISDELETED TYPE STRING,
FIXEDSUPPLIER TYPE STRING,
REQUISITIONERNAME TYPE STRING,
CREATEDBYUSER TYPE STRING,
PURREQNITEMCURRENCY TYPE STRING,
DELIVDATECATEGORY TYPE STRING,
PURCHASECONTRACT TYPE STRING,
PURCHASECONTRACTITEM TYPE STRING,
PURREQNORIGIN TYPE STRING,
PRODUCTTYPE TYPE STRING,
DUMMY_EBAN_INCL_EEW_PS TYPE STRING,
TO_PURCHASEREQNACCTASSGMT TYPE STRING,
TO_PURCHASEREQNDELIVERYADDRESS TYPE STRING,
PURCHASEREQUISITION TYPE STRING,
PURCHASEREQUISITIONITEM TYPE STRING,
CITYNAME TYPE STRING,
POSTALCODE TYPE STRING,
STREETNAME TYPE STRING,
COUNTRY TYPE STRING,
REGION TYPE STRING,
FORMOFADDRESS TYPE STRING,
BUSINESSPARTNERNAME1 TYPE STRING,
PHONENUMBER TYPE STRING,
FAXNUMBER TYPE STRING,
TO_PURCHASEREQNTEXT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MMPUR_SSP_REQN_ITEM_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_SSP_REQN_ITEM_STR-PURCHASEREQUISITION sy-vline 
WA_MMPUR_SSP_REQN_ITEM_STR-PURCHASEREQUISITIONITEM sy-vline 
WA_MMPUR_SSP_REQN_ITEM_STR-PURCHASEREQUISITIONTYPE sy-vline 
WA_MMPUR_SSP_REQN_ITEM_STR-PURCHASINGDOCUMENTITEMCATEGORY sy-vline 
WA_MMPUR_SSP_REQN_ITEM_STR-PURCHASEREQUISITIONITEMTEXT sy-vline 
WA_MMPUR_SSP_REQN_ITEM_STR-MATERIAL sy-vline 
WA_MMPUR_SSP_REQN_ITEM_STR-MATERIALGROUP sy-vline 
WA_MMPUR_SSP_REQN_ITEM_STR-PURCHASINGDOCUMENTCATEGORY sy-vline 
WA_MMPUR_SSP_REQN_ITEM_STR-REQUESTEDQUANTITY sy-vline 
WA_MMPUR_SSP_REQN_ITEM_STR-BASEUNIT sy-vline 
WA_MMPUR_SSP_REQN_ITEM_STR-PURCHASEREQUISITIONPRICE sy-vline 
WA_MMPUR_SSP_REQN_ITEM_STR-PURREQNPRICEQUANTITY sy-vline 
WA_MMPUR_SSP_REQN_ITEM_STR-PURCHASINGORGANIZATION sy-vline 
WA_MMPUR_SSP_REQN_ITEM_STR-PURCHASINGGROUP sy-vline 
WA_MMPUR_SSP_REQN_ITEM_STR-PLANT sy-vline 
WA_MMPUR_SSP_REQN_ITEM_STR-DELIVERYDATE sy-vline 
WA_MMPUR_SSP_REQN_ITEM_STR-CREATIONDATE sy-vline 
WA_MMPUR_SSP_REQN_ITEM_STR-PROCESSINGSTATUS sy-vline 
WA_MMPUR_SSP_REQN_ITEM_STR-PURCHASINGINFORECORD sy-vline 
WA_MMPUR_SSP_REQN_ITEM_STR-SUPPLIER sy-vline 
WA_MMPUR_SSP_REQN_ITEM_STR-ISDELETED sy-vline 
WA_MMPUR_SSP_REQN_ITEM_STR-FIXEDSUPPLIER sy-vline 
WA_MMPUR_SSP_REQN_ITEM_STR-REQUISITIONERNAME sy-vline 
WA_MMPUR_SSP_REQN_ITEM_STR-CREATEDBYUSER sy-vline 
WA_MMPUR_SSP_REQN_ITEM_STR-PURREQNITEMCURRENCY sy-vline 
WA_MMPUR_SSP_REQN_ITEM_STR-DELIVDATECATEGORY sy-vline 
WA_MMPUR_SSP_REQN_ITEM_STR-PURCHASECONTRACT sy-vline 
WA_MMPUR_SSP_REQN_ITEM_STR-PURCHASECONTRACTITEM sy-vline 
WA_MMPUR_SSP_REQN_ITEM_STR-PURREQNORIGIN sy-vline 
WA_MMPUR_SSP_REQN_ITEM_STR-PRODUCTTYPE sy-vline 
WA_MMPUR_SSP_REQN_ITEM_STR-DUMMY_EBAN_INCL_EEW_PS sy-vline 
WA_MMPUR_SSP_REQN_ITEM_STR-TO_PURCHASEREQNACCTASSGMT sy-vline 
WA_MMPUR_SSP_REQN_ITEM_STR-TO_PURCHASEREQNDELIVERYADDRESS sy-vline 
WA_MMPUR_SSP_REQN_ITEM_STR-PURCHASEREQUISITION sy-vline 
WA_MMPUR_SSP_REQN_ITEM_STR-PURCHASEREQUISITIONITEM sy-vline 
WA_MMPUR_SSP_REQN_ITEM_STR-CITYNAME sy-vline 
WA_MMPUR_SSP_REQN_ITEM_STR-POSTALCODE sy-vline 
WA_MMPUR_SSP_REQN_ITEM_STR-STREETNAME sy-vline 
WA_MMPUR_SSP_REQN_ITEM_STR-COUNTRY sy-vline 
WA_MMPUR_SSP_REQN_ITEM_STR-REGION sy-vline 
WA_MMPUR_SSP_REQN_ITEM_STR-FORMOFADDRESS sy-vline 
WA_MMPUR_SSP_REQN_ITEM_STR-BUSINESSPARTNERNAME1 sy-vline 
WA_MMPUR_SSP_REQN_ITEM_STR-PHONENUMBER sy-vline 
WA_MMPUR_SSP_REQN_ITEM_STR-FAXNUMBER sy-vline 
WA_MMPUR_SSP_REQN_ITEM_STR-TO_PURCHASEREQNTEXT sy-vline      INTO ld_text SEPARATED BY SPACE.

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