ABAP Select data from SAP table APURCHASEORDER into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM APURCHASEORDER
*  INTO TABLE @DATA(IT_APURCHASEORDER2).
*--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_APURCHASEORDER INDEX 1 INTO DATA(WA_APURCHASEORDER2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<APURCHASEORDER>-MANDT = 1.
<APURCHASEORDER>-PURCHASEORDER = 1.
<APURCHASEORDER>-COMPANYCODE = 1.
<APURCHASEORDER>-PURCHASEORDERTYPE = 1.
<APURCHASEORDER>-PURCHASINGDOCUMENTDELETIONCODE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_APURCHASEORDER-PURCHASINGPROCESSINGSTATUS, sy-vline,
  WA_APURCHASEORDER-CREATEDBYUSER, sy-vline,
  WA_APURCHASEORDER-CREATIONDATE, sy-vline,
  WA_APURCHASEORDER-LASTCHANGEDATETIME, sy-vline,
  WA_APURCHASEORDER-SUPPLIER, sy-vline,
  WA_APURCHASEORDER-PURCHASEORDERSUBTYPE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_APURCHASEORDER 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_APURCHASEORDER 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_APURCHASEORDER INTO WA_APURCHASEORDER.


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

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

*Conversion exit ISOLA, internal->external for field LANGUAGE
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_APURCHASEORDER-LANGUAGE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_APURCHASEORDER-LANGUAGE.
WRITE:/ 'New Value:', ld_input.

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

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

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

*Conversion exit ISOLA, internal->external for field ADDRESSCORRESPONDENCELANGUAGE
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_APURCHASEORDER-ADDRESSCORRESPONDENCELANGUAGE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_APURCHASEORDER-ADDRESSCORRESPONDENCELANGUAGE.
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_APURCHASEORDER_STR, 
MANDT TYPE STRING,
PURCHASEORDER TYPE STRING,
COMPANYCODE TYPE STRING,
PURCHASEORDERTYPE TYPE STRING,
PURCHASINGDOCUMENTDELETIONCODE TYPE STRING,
PURCHASINGPROCESSINGSTATUS TYPE STRING,
CREATEDBYUSER TYPE STRING,
CREATIONDATE TYPE STRING,
LASTCHANGEDATETIME TYPE STRING,
SUPPLIER TYPE STRING,
PURCHASEORDERSUBTYPE TYPE STRING,
LANGUAGE TYPE STRING,
PAYMENTTERMS TYPE STRING,
CASHDISCOUNT1DAYS TYPE STRING,
CASHDISCOUNT2DAYS TYPE STRING,
NETPAYMENTDAYS TYPE STRING,
CASHDISCOUNT1PERCENT TYPE STRING,
CASHDISCOUNT2PERCENT TYPE STRING,
PURCHASINGORGANIZATION TYPE STRING,
PURCHASINGDOCUMENTORIGIN TYPE STRING,
PURCHASINGGROUP TYPE STRING,
PURCHASEORDERDATE TYPE STRING,
DOCUMENTCURRENCY TYPE STRING,
EXCHANGERATE TYPE STRING,
EXCHANGERATEISFIXED TYPE STRING,
VALIDITYSTARTDATE TYPE STRING,
VALIDITYENDDATE TYPE STRING,
SUPPLIERQUOTATIONEXTERNALID TYPE STRING,
SUPPLIERRESPSALESPERSONNAME TYPE STRING,
SUPPLIERPHONENUMBER TYPE STRING,
SUPPLYINGSUPPLIER TYPE STRING,
SUPPLYINGPLANT TYPE STRING,
INCOTERMSCLASSIFICATION TYPE STRING,
CORRESPNCEXTERNALREFERENCE TYPE STRING,
CORRESPNCINTERNALREFERENCE TYPE STRING,
INVOICINGPARTY TYPE STRING,
RELEASEISNOTCOMPLETED TYPE STRING,
PURCHASINGCOMPLETENESSSTATUS TYPE STRING,
INCOTERMSVERSION TYPE STRING,
INCOTERMSLOCATION1 TYPE STRING,
INCOTERMSLOCATION2 TYPE STRING,
MANUALSUPPLIERADDRESSID TYPE STRING,
ISENDOFPURPOSEBLOCKED TYPE STRING,
ADDRESSCITYNAME TYPE STRING,
ADDRESSFAXNUMBER TYPE STRING,
ADDRESSHOUSENUMBER TYPE STRING,
ADDRESSNAME TYPE STRING,
ADDRESSPOSTALCODE TYPE STRING,
ADDRESSSTREETNAME TYPE STRING,
ADDRESSPHONENUMBER TYPE STRING,
ADDRESSREGION TYPE STRING,
ADDRESSCOUNTRY TYPE STRING,
ADDRESSCORRESPONDENCELANGUAGE TYPE STRING,
PURGAGGRGDPRODCMPLNCSUPLRSTS TYPE STRING,
PURGAGGRGDPRODMARKETABILITYSTS TYPE STRING,
PURGAGGRGDSFTYDATASHEETSTATUS TYPE STRING,
PURGPRODCMPLNCTOTDNGRSGOODSSTS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_APURCHASEORDER_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_APURCHASEORDER_STR-MANDT sy-vline 
WA_APURCHASEORDER_STR-PURCHASEORDER sy-vline 
WA_APURCHASEORDER_STR-COMPANYCODE sy-vline 
WA_APURCHASEORDER_STR-PURCHASEORDERTYPE sy-vline 
WA_APURCHASEORDER_STR-PURCHASINGDOCUMENTDELETIONCODE sy-vline 
WA_APURCHASEORDER_STR-PURCHASINGPROCESSINGSTATUS sy-vline 
WA_APURCHASEORDER_STR-CREATEDBYUSER sy-vline 
WA_APURCHASEORDER_STR-CREATIONDATE sy-vline 
WA_APURCHASEORDER_STR-LASTCHANGEDATETIME sy-vline 
WA_APURCHASEORDER_STR-SUPPLIER sy-vline 
WA_APURCHASEORDER_STR-PURCHASEORDERSUBTYPE sy-vline 
WA_APURCHASEORDER_STR-LANGUAGE sy-vline 
WA_APURCHASEORDER_STR-PAYMENTTERMS sy-vline 
WA_APURCHASEORDER_STR-CASHDISCOUNT1DAYS sy-vline 
WA_APURCHASEORDER_STR-CASHDISCOUNT2DAYS sy-vline 
WA_APURCHASEORDER_STR-NETPAYMENTDAYS sy-vline 
WA_APURCHASEORDER_STR-CASHDISCOUNT1PERCENT sy-vline 
WA_APURCHASEORDER_STR-CASHDISCOUNT2PERCENT sy-vline 
WA_APURCHASEORDER_STR-PURCHASINGORGANIZATION sy-vline 
WA_APURCHASEORDER_STR-PURCHASINGDOCUMENTORIGIN sy-vline 
WA_APURCHASEORDER_STR-PURCHASINGGROUP sy-vline 
WA_APURCHASEORDER_STR-PURCHASEORDERDATE sy-vline 
WA_APURCHASEORDER_STR-DOCUMENTCURRENCY sy-vline 
WA_APURCHASEORDER_STR-EXCHANGERATE sy-vline 
WA_APURCHASEORDER_STR-EXCHANGERATEISFIXED sy-vline 
WA_APURCHASEORDER_STR-VALIDITYSTARTDATE sy-vline 
WA_APURCHASEORDER_STR-VALIDITYENDDATE sy-vline 
WA_APURCHASEORDER_STR-SUPPLIERQUOTATIONEXTERNALID sy-vline 
WA_APURCHASEORDER_STR-SUPPLIERRESPSALESPERSONNAME sy-vline 
WA_APURCHASEORDER_STR-SUPPLIERPHONENUMBER sy-vline 
WA_APURCHASEORDER_STR-SUPPLYINGSUPPLIER sy-vline 
WA_APURCHASEORDER_STR-SUPPLYINGPLANT sy-vline 
WA_APURCHASEORDER_STR-INCOTERMSCLASSIFICATION sy-vline 
WA_APURCHASEORDER_STR-CORRESPNCEXTERNALREFERENCE sy-vline 
WA_APURCHASEORDER_STR-CORRESPNCINTERNALREFERENCE sy-vline 
WA_APURCHASEORDER_STR-INVOICINGPARTY sy-vline 
WA_APURCHASEORDER_STR-RELEASEISNOTCOMPLETED sy-vline 
WA_APURCHASEORDER_STR-PURCHASINGCOMPLETENESSSTATUS sy-vline 
WA_APURCHASEORDER_STR-INCOTERMSVERSION sy-vline 
WA_APURCHASEORDER_STR-INCOTERMSLOCATION1 sy-vline 
WA_APURCHASEORDER_STR-INCOTERMSLOCATION2 sy-vline 
WA_APURCHASEORDER_STR-MANUALSUPPLIERADDRESSID sy-vline 
WA_APURCHASEORDER_STR-ISENDOFPURPOSEBLOCKED sy-vline 
WA_APURCHASEORDER_STR-ADDRESSCITYNAME sy-vline 
WA_APURCHASEORDER_STR-ADDRESSFAXNUMBER sy-vline 
WA_APURCHASEORDER_STR-ADDRESSHOUSENUMBER sy-vline 
WA_APURCHASEORDER_STR-ADDRESSNAME sy-vline 
WA_APURCHASEORDER_STR-ADDRESSPOSTALCODE sy-vline 
WA_APURCHASEORDER_STR-ADDRESSSTREETNAME sy-vline 
WA_APURCHASEORDER_STR-ADDRESSPHONENUMBER sy-vline 
WA_APURCHASEORDER_STR-ADDRESSREGION sy-vline 
WA_APURCHASEORDER_STR-ADDRESSCOUNTRY sy-vline 
WA_APURCHASEORDER_STR-ADDRESSCORRESPONDENCELANGUAGE sy-vline 
WA_APURCHASEORDER_STR-PURGAGGRGDPRODCMPLNCSUPLRSTS sy-vline 
WA_APURCHASEORDER_STR-PURGAGGRGDPRODMARKETABILITYSTS sy-vline 
WA_APURCHASEORDER_STR-PURGAGGRGDSFTYDATASHEETSTATUS sy-vline 
WA_APURCHASEORDER_STR-PURGPRODCMPLNCTOTDNGRSGOODSSTS sy-vline      INTO ld_text SEPARATED BY SPACE.

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