ABAP Select data from SAP table ISTOCKHEADER into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ISTOCKHEADER
*  INTO TABLE @DATA(IT_ISTOCKHEADER2).
*--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_ISTOCKHEADER INDEX 1 INTO DATA(WA_ISTOCKHEADER2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ISTOCKHEADER>-MANDT = 1.
<ISTOCKHEADER>-PURCHASEORDER = 1.
<ISTOCKHEADER>-PURCHASEORDERTYPE = 1.
<ISTOCKHEADER>-PURCHASEORDERSUBTYPE = 1.
<ISTOCKHEADER>-CREATEDBYUSER = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ISTOCKHEADER-CREATIONDATE, sy-vline,
  WA_ISTOCKHEADER-PURCHASEORDERDATE, sy-vline,
  WA_ISTOCKHEADER-LANGUAGE, sy-vline,
  WA_ISTOCKHEADER-PURCHASINGDOCUMENTDELETIONCODE, sy-vline,
  WA_ISTOCKHEADER-RELEASEISNOTCOMPLETED, sy-vline,
  WA_ISTOCKHEADER-COMPANYCODE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ISTOCKHEADER 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_ISTOCKHEADER 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_ISTOCKHEADER INTO WA_ISTOCKHEADER.


*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_ISTOCKHEADER-PURCHASEORDER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISTOCKHEADER-PURCHASEORDER.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

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

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

*Conversion exit EXCRT, internal->external for field EXCHANGERATE
CALL FUNCTION 'CONVERSION_EXIT_EXCRT_OUTPUT'
  EXPORTING
    input =                      WA_ISTOCKHEADER-EXCHANGERATE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISTOCKHEADER-EXCHANGERATE.
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_ISTOCKHEADER_STR, 
MANDT TYPE STRING,
PURCHASEORDER TYPE STRING,
PURCHASEORDERTYPE TYPE STRING,
PURCHASEORDERSUBTYPE TYPE STRING,
CREATEDBYUSER TYPE STRING,
CREATIONDATE TYPE STRING,
PURCHASEORDERDATE TYPE STRING,
LANGUAGE TYPE STRING,
PURCHASINGDOCUMENTDELETIONCODE TYPE STRING,
RELEASEISNOTCOMPLETED TYPE STRING,
COMPANYCODE TYPE STRING,
PURCHASINGORGANIZATION TYPE STRING,
PURCHASINGGROUP TYPE STRING,
SUPPLIER TYPE STRING,
MANUALSUPPLIERADDRESSID TYPE STRING,
SUPPLIERADDRESSID TYPE STRING,
SUPPLIERRESPSALESPERSONNAME TYPE STRING,
SUPPLIERPHONENUMBER TYPE STRING,
SUPPLYINGSUPPLIER TYPE STRING,
SUPPLYINGPLANT TYPE STRING,
INVOICINGPARTY TYPE STRING,
PAYMENTTERMS TYPE STRING,
PURCHASINGDOCUMENTCONDITION TYPE STRING,
PRICINGPROCEDURE TYPE STRING,
DOCUMENTCURRENCY TYPE STRING,
VALIDITYSTARTDATE TYPE STRING,
VALIDITYENDDATE TYPE STRING,
EXCHANGERATE TYPE STRING,
EXCHANGERATEISFIXED TYPE STRING,
LASTCHANGEDATETIME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ISTOCKHEADER_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_ISTOCKHEADER_STR-MANDT sy-vline 
WA_ISTOCKHEADER_STR-PURCHASEORDER sy-vline 
WA_ISTOCKHEADER_STR-PURCHASEORDERTYPE sy-vline 
WA_ISTOCKHEADER_STR-PURCHASEORDERSUBTYPE sy-vline 
WA_ISTOCKHEADER_STR-CREATEDBYUSER sy-vline 
WA_ISTOCKHEADER_STR-CREATIONDATE sy-vline 
WA_ISTOCKHEADER_STR-PURCHASEORDERDATE sy-vline 
WA_ISTOCKHEADER_STR-LANGUAGE sy-vline 
WA_ISTOCKHEADER_STR-PURCHASINGDOCUMENTDELETIONCODE sy-vline 
WA_ISTOCKHEADER_STR-RELEASEISNOTCOMPLETED sy-vline 
WA_ISTOCKHEADER_STR-COMPANYCODE sy-vline 
WA_ISTOCKHEADER_STR-PURCHASINGORGANIZATION sy-vline 
WA_ISTOCKHEADER_STR-PURCHASINGGROUP sy-vline 
WA_ISTOCKHEADER_STR-SUPPLIER sy-vline 
WA_ISTOCKHEADER_STR-MANUALSUPPLIERADDRESSID sy-vline 
WA_ISTOCKHEADER_STR-SUPPLIERADDRESSID sy-vline 
WA_ISTOCKHEADER_STR-SUPPLIERRESPSALESPERSONNAME sy-vline 
WA_ISTOCKHEADER_STR-SUPPLIERPHONENUMBER sy-vline 
WA_ISTOCKHEADER_STR-SUPPLYINGSUPPLIER sy-vline 
WA_ISTOCKHEADER_STR-SUPPLYINGPLANT sy-vline 
WA_ISTOCKHEADER_STR-INVOICINGPARTY sy-vline 
WA_ISTOCKHEADER_STR-PAYMENTTERMS sy-vline 
WA_ISTOCKHEADER_STR-PURCHASINGDOCUMENTCONDITION sy-vline 
WA_ISTOCKHEADER_STR-PRICINGPROCEDURE sy-vline 
WA_ISTOCKHEADER_STR-DOCUMENTCURRENCY sy-vline 
WA_ISTOCKHEADER_STR-VALIDITYSTARTDATE sy-vline 
WA_ISTOCKHEADER_STR-VALIDITYENDDATE sy-vline 
WA_ISTOCKHEADER_STR-EXCHANGERATE sy-vline 
WA_ISTOCKHEADER_STR-EXCHANGERATEISFIXED sy-vline 
WA_ISTOCKHEADER_STR-LASTCHANGEDATETIME sy-vline      INTO ld_text SEPARATED BY SPACE.

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