ABAP Select data from SAP table MMPUR_S_PO_HEADER into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP MMPUR_S_PO_HEADER 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_S_PO_HEADER. 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_S_PO_HEADER 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_S_PO_HEADER TYPE STANDARD TABLE OF MMPUR_S_PO_HEADER,
      WA_MMPUR_S_PO_HEADER TYPE MMPUR_S_PO_HEADER,
      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_S_PO_HEADER> TYPE MMPUR_S_PO_HEADER.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MMPUR_S_PO_HEADER
*  INTO TABLE @DATA(IT_MMPUR_S_PO_HEADER2).
*--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_S_PO_HEADER INDEX 1 INTO DATA(WA_MMPUR_S_PO_HEADER2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MMPUR_S_PO_HEADER>-PURCHASEORDER = 1.
<MMPUR_S_PO_HEADER>-PURCHASINGDOCUMENTCATEGORY = 1.
<MMPUR_S_PO_HEADER>-PURCHASEORDERTYPE = 1.
<MMPUR_S_PO_HEADER>-PURCHASEORDERSUBTYPE = 1.
<MMPUR_S_PO_HEADER>-PURCHASINGDOCUMENTORIGIN = 1.

ENDLOOP.

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

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


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

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

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

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

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

*Conversion exit EXCRT, internal->external for field EXCHANGERATE
CALL FUNCTION 'CONVERSION_EXIT_EXCRT_OUTPUT'
  EXPORTING
    input =                      WA_MMPUR_S_PO_HEADER-EXCHANGERATE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MMPUR_S_PO_HEADER-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_MMPUR_S_PO_HEADER_STR, 
PURCHASEORDER TYPE STRING,
PURCHASINGDOCUMENTCATEGORY TYPE STRING,
PURCHASEORDERTYPE TYPE STRING,
PURCHASEORDERSUBTYPE TYPE STRING,
PURCHASINGDOCUMENTORIGIN TYPE STRING,
CREATEDBYUSER TYPE STRING,
CREATIONDATE TYPE STRING,
PURCHASEORDERDATE TYPE STRING,
LANGUAGE TYPE STRING,
PURCHASINGDOCUMENTDELETIONCODE TYPE STRING,
RELEASEISNOTCOMPLETED TYPE STRING,
PURCHASINGCOMPLETENESSSTATUS TYPE STRING,
PURCHASINGPROCESSINGSTATUS TYPE STRING,
PURGRELEASESEQUENCESTATUS TYPE STRING,
RELEASECODE TYPE STRING,
COMPANYCODE TYPE STRING,
PURCHASINGORGANIZATION TYPE STRING,
PURCHASINGGROUP TYPE STRING,
SUPPLIER TYPE STRING,
SUPPLIERADDRESSID TYPE STRING,
INVOICINGPARTY TYPE STRING,
SUPPLIERQUOTATIONEXTERNALID TYPE STRING,
PAYMENTTERMS TYPE STRING,
CASHDISCOUNT1DAYS TYPE STRING,
CASHDISCOUNT2DAYS TYPE STRING,
NETPAYMENTDAYS TYPE STRING,
CASHDISCOUNT1PERCENT TYPE STRING,
CASHDISCOUNT2PERCENT TYPE STRING,
INCOTERMSCLASSIFICATION TYPE STRING,
INCOTERMSTRANSFERLOCATION TYPE STRING,
PURCHASINGDOCUMENTCONDITION TYPE STRING,
PRICINGPROCEDURE TYPE STRING,
DOCUMENTCURRENCY TYPE STRING,
VALIDITYSTARTDATE TYPE STRING,
VALIDITYENDDATE TYPE STRING,
EXCHANGERATE TYPE STRING,
EXCHANGERATEISFIXED TYPE STRING,
VATREGISTRATION TYPE STRING,
EXTRACTIONTYPE TYPE STRING,
LASTCHANGEDATETIME TYPE STRING,
EXTRACTIONDATETIME TYPE STRING,
EXTRACTIONCATEGORY TYPE STRING,
IS_ARCHIVED TYPE STRING,
USERDESCRIPTION TYPE STRING,
ISNOTEAVAILABLE TYPE STRING,
ISATTACHMENTAVAILABLE TYPE STRING,
PURCHASEORDEROUTPUTSTATUS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MMPUR_S_PO_HEADER_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_S_PO_HEADER_STR-PURCHASEORDER sy-vline 
WA_MMPUR_S_PO_HEADER_STR-PURCHASINGDOCUMENTCATEGORY sy-vline 
WA_MMPUR_S_PO_HEADER_STR-PURCHASEORDERTYPE sy-vline 
WA_MMPUR_S_PO_HEADER_STR-PURCHASEORDERSUBTYPE sy-vline 
WA_MMPUR_S_PO_HEADER_STR-PURCHASINGDOCUMENTORIGIN sy-vline 
WA_MMPUR_S_PO_HEADER_STR-CREATEDBYUSER sy-vline 
WA_MMPUR_S_PO_HEADER_STR-CREATIONDATE sy-vline 
WA_MMPUR_S_PO_HEADER_STR-PURCHASEORDERDATE sy-vline 
WA_MMPUR_S_PO_HEADER_STR-LANGUAGE sy-vline 
WA_MMPUR_S_PO_HEADER_STR-PURCHASINGDOCUMENTDELETIONCODE sy-vline 
WA_MMPUR_S_PO_HEADER_STR-RELEASEISNOTCOMPLETED sy-vline 
WA_MMPUR_S_PO_HEADER_STR-PURCHASINGCOMPLETENESSSTATUS sy-vline 
WA_MMPUR_S_PO_HEADER_STR-PURCHASINGPROCESSINGSTATUS sy-vline 
WA_MMPUR_S_PO_HEADER_STR-PURGRELEASESEQUENCESTATUS sy-vline 
WA_MMPUR_S_PO_HEADER_STR-RELEASECODE sy-vline 
WA_MMPUR_S_PO_HEADER_STR-COMPANYCODE sy-vline 
WA_MMPUR_S_PO_HEADER_STR-PURCHASINGORGANIZATION sy-vline 
WA_MMPUR_S_PO_HEADER_STR-PURCHASINGGROUP sy-vline 
WA_MMPUR_S_PO_HEADER_STR-SUPPLIER sy-vline 
WA_MMPUR_S_PO_HEADER_STR-SUPPLIERADDRESSID sy-vline 
WA_MMPUR_S_PO_HEADER_STR-INVOICINGPARTY sy-vline 
WA_MMPUR_S_PO_HEADER_STR-SUPPLIERQUOTATIONEXTERNALID sy-vline 
WA_MMPUR_S_PO_HEADER_STR-PAYMENTTERMS sy-vline 
WA_MMPUR_S_PO_HEADER_STR-CASHDISCOUNT1DAYS sy-vline 
WA_MMPUR_S_PO_HEADER_STR-CASHDISCOUNT2DAYS sy-vline 
WA_MMPUR_S_PO_HEADER_STR-NETPAYMENTDAYS sy-vline 
WA_MMPUR_S_PO_HEADER_STR-CASHDISCOUNT1PERCENT sy-vline 
WA_MMPUR_S_PO_HEADER_STR-CASHDISCOUNT2PERCENT sy-vline 
WA_MMPUR_S_PO_HEADER_STR-INCOTERMSCLASSIFICATION sy-vline 
WA_MMPUR_S_PO_HEADER_STR-INCOTERMSTRANSFERLOCATION sy-vline 
WA_MMPUR_S_PO_HEADER_STR-PURCHASINGDOCUMENTCONDITION sy-vline 
WA_MMPUR_S_PO_HEADER_STR-PRICINGPROCEDURE sy-vline 
WA_MMPUR_S_PO_HEADER_STR-DOCUMENTCURRENCY sy-vline 
WA_MMPUR_S_PO_HEADER_STR-VALIDITYSTARTDATE sy-vline 
WA_MMPUR_S_PO_HEADER_STR-VALIDITYENDDATE sy-vline 
WA_MMPUR_S_PO_HEADER_STR-EXCHANGERATE sy-vline 
WA_MMPUR_S_PO_HEADER_STR-EXCHANGERATEISFIXED sy-vline 
WA_MMPUR_S_PO_HEADER_STR-VATREGISTRATION sy-vline 
WA_MMPUR_S_PO_HEADER_STR-EXTRACTIONTYPE sy-vline 
WA_MMPUR_S_PO_HEADER_STR-LASTCHANGEDATETIME sy-vline 
WA_MMPUR_S_PO_HEADER_STR-EXTRACTIONDATETIME sy-vline 
WA_MMPUR_S_PO_HEADER_STR-EXTRACTIONCATEGORY sy-vline 
WA_MMPUR_S_PO_HEADER_STR-IS_ARCHIVED sy-vline 
WA_MMPUR_S_PO_HEADER_STR-USERDESCRIPTION sy-vline 
WA_MMPUR_S_PO_HEADER_STR-ISNOTEAVAILABLE sy-vline 
WA_MMPUR_S_PO_HEADER_STR-ISATTACHMENTAVAILABLE sy-vline 
WA_MMPUR_S_PO_HEADER_STR-PURCHASEORDEROUTPUTSTATUS sy-vline      INTO ld_text SEPARATED BY SPACE.

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