ABAP Select data from SAP table PPOMAINHEADLIST into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PPOMAINHEADLIST
*  INTO TABLE @DATA(IT_PPOMAINHEADLIST2).
*--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_PPOMAINHEADLIST INDEX 1 INTO DATA(WA_PPOMAINHEADLIST2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PPOMAINHEADLIST>-MANDT = 1.
<PPOMAINHEADLIST>-PURCHASEORDER = 1.
<PPOMAINHEADLIST>-PURCHASINGDOCUMENTCATEGORY = 1.
<PPOMAINHEADLIST>-PURCHASINGDOCUMENTTYPE = 1.
<PPOMAINHEADLIST>-COMPANYCODE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PPOMAINHEADLIST-PURCHASINGORGANIZATION, sy-vline,
  WA_PPOMAINHEADLIST-PURCHASINGGROUP, sy-vline,
  WA_PPOMAINHEADLIST-SUPPLIER, sy-vline,
  WA_PPOMAINHEADLIST-CURRENCY, sy-vline,
  WA_PPOMAINHEADLIST-PAYMENTTERMS, sy-vline,
  WA_PPOMAINHEADLIST-CASHDISCOUNT1DAYS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PPOMAINHEADLIST 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_PPOMAINHEADLIST 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_PPOMAINHEADLIST INTO WA_PPOMAINHEADLIST.


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

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

*Conversion exit ALPHA, internal->external for field INVOICINGPARTY
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_PPOMAINHEADLIST-INVOICINGPARTY
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PPOMAINHEADLIST-INVOICINGPARTY.
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_PPOMAINHEADLIST_STR, 
MANDT TYPE STRING,
PURCHASEORDER TYPE STRING,
PURCHASINGDOCUMENTCATEGORY TYPE STRING,
PURCHASINGDOCUMENTTYPE TYPE STRING,
COMPANYCODE TYPE STRING,
PURCHASINGORGANIZATION TYPE STRING,
PURCHASINGGROUP TYPE STRING,
SUPPLIER TYPE STRING,
CURRENCY TYPE STRING,
PAYMENTTERMS TYPE STRING,
CASHDISCOUNT1DAYS TYPE STRING,
CASHDISCOUNT2DAYS TYPE STRING,
NETPAYMENTDAYS TYPE STRING,
CASHDISCOUNT1PERCENT TYPE STRING,
CASHDISCOUNT2PERCENT TYPE STRING,
EXCHANGERATE TYPE STRING,
INCOTERMSCLASSIFICATION TYPE STRING,
INCOTERMSTRANSFERLOCATION TYPE STRING,
INCOTERMSVERSION TYPE STRING,
INCOTERMSLOCATION1 TYPE STRING,
INCOTERMSLOCATION2 TYPE STRING,
CREATEDBYUSER TYPE STRING,
PURCHASEORDERDATE TYPE STRING,
LASTCHANGEDATETIME TYPE STRING,
LASTCHANGEUSER TYPE STRING,
INVOICINGPARTY TYPE STRING,
RELEASEISNOTCOMPLETED TYPE STRING,
ISHELD TYPE STRING,
PURCHASINGDOCUMENTCONDITION TYPE STRING,
PRICINGPROCEDURE TYPE STRING,
VALIDITYENDDATE TYPE STRING,
EDITSTATE TYPE STRING,
HASTWIN TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PPOMAINHEADLIST_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_PPOMAINHEADLIST_STR-MANDT sy-vline 
WA_PPOMAINHEADLIST_STR-PURCHASEORDER sy-vline 
WA_PPOMAINHEADLIST_STR-PURCHASINGDOCUMENTCATEGORY sy-vline 
WA_PPOMAINHEADLIST_STR-PURCHASINGDOCUMENTTYPE sy-vline 
WA_PPOMAINHEADLIST_STR-COMPANYCODE sy-vline 
WA_PPOMAINHEADLIST_STR-PURCHASINGORGANIZATION sy-vline 
WA_PPOMAINHEADLIST_STR-PURCHASINGGROUP sy-vline 
WA_PPOMAINHEADLIST_STR-SUPPLIER sy-vline 
WA_PPOMAINHEADLIST_STR-CURRENCY sy-vline 
WA_PPOMAINHEADLIST_STR-PAYMENTTERMS sy-vline 
WA_PPOMAINHEADLIST_STR-CASHDISCOUNT1DAYS sy-vline 
WA_PPOMAINHEADLIST_STR-CASHDISCOUNT2DAYS sy-vline 
WA_PPOMAINHEADLIST_STR-NETPAYMENTDAYS sy-vline 
WA_PPOMAINHEADLIST_STR-CASHDISCOUNT1PERCENT sy-vline 
WA_PPOMAINHEADLIST_STR-CASHDISCOUNT2PERCENT sy-vline 
WA_PPOMAINHEADLIST_STR-EXCHANGERATE sy-vline 
WA_PPOMAINHEADLIST_STR-INCOTERMSCLASSIFICATION sy-vline 
WA_PPOMAINHEADLIST_STR-INCOTERMSTRANSFERLOCATION sy-vline 
WA_PPOMAINHEADLIST_STR-INCOTERMSVERSION sy-vline 
WA_PPOMAINHEADLIST_STR-INCOTERMSLOCATION1 sy-vline 
WA_PPOMAINHEADLIST_STR-INCOTERMSLOCATION2 sy-vline 
WA_PPOMAINHEADLIST_STR-CREATEDBYUSER sy-vline 
WA_PPOMAINHEADLIST_STR-PURCHASEORDERDATE sy-vline 
WA_PPOMAINHEADLIST_STR-LASTCHANGEDATETIME sy-vline 
WA_PPOMAINHEADLIST_STR-LASTCHANGEUSER sy-vline 
WA_PPOMAINHEADLIST_STR-INVOICINGPARTY sy-vline 
WA_PPOMAINHEADLIST_STR-RELEASEISNOTCOMPLETED sy-vline 
WA_PPOMAINHEADLIST_STR-ISHELD sy-vline 
WA_PPOMAINHEADLIST_STR-PURCHASINGDOCUMENTCONDITION sy-vline 
WA_PPOMAINHEADLIST_STR-PRICINGPROCEDURE sy-vline 
WA_PPOMAINHEADLIST_STR-VALIDITYENDDATE sy-vline 
WA_PPOMAINHEADLIST_STR-EDITSTATE sy-vline 
WA_PPOMAINHEADLIST_STR-HASTWIN sy-vline      INTO ld_text SEPARATED BY SPACE.

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