ABAP Select data from SAP table MMPUR_OA_S_UI_PURCTR into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP MMPUR_OA_S_UI_PURCTR 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_OA_S_UI_PURCTR. 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_OA_S_UI_PURCTR 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_OA_S_UI_PURCTR TYPE STANDARD TABLE OF MMPUR_OA_S_UI_PURCTR,
      WA_MMPUR_OA_S_UI_PURCTR TYPE MMPUR_OA_S_UI_PURCTR,
      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_OA_S_UI_PURCTR> TYPE MMPUR_OA_S_UI_PURCTR.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MMPUR_OA_S_UI_PURCTR
*  INTO TABLE @DATA(IT_MMPUR_OA_S_UI_PURCTR2).
*--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_OA_S_UI_PURCTR INDEX 1 INTO DATA(WA_MMPUR_OA_S_UI_PURCTR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MMPUR_OA_S_UI_PURCTR>-MANDT = 1.
<MMPUR_OA_S_UI_PURCTR>-PURCHASECONTRACT = 1.
<MMPUR_OA_S_UI_PURCTR>-PURCHASECONTRACTTYPE = 1.
<MMPUR_OA_S_UI_PURCTR>-PURCHASINGORGANIZATION = 1.
<MMPUR_OA_S_UI_PURCTR>-PURCHASINGGROUP = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MMPUR_OA_S_UI_PURCTR-DOCUMENTCURRENCY, sy-vline,
  WA_MMPUR_OA_S_UI_PURCTR-COMPANYCODE, sy-vline,
  WA_MMPUR_OA_S_UI_PURCTR-INCOTERMSCLASSIFICATION, sy-vline,
  WA_MMPUR_OA_S_UI_PURCTR-INCOTERMSTRANSFERLOCATION, sy-vline,
  WA_MMPUR_OA_S_UI_PURCTR-PAYMENTTERMS, sy-vline,
  WA_MMPUR_OA_S_UI_PURCTR-CASHDISCOUNT1DAYS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MMPUR_OA_S_UI_PURCTR 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_OA_S_UI_PURCTR 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_OA_S_UI_PURCTR INTO WA_MMPUR_OA_S_UI_PURCTR.


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

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

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

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

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

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

*Conversion exit ISOLA, internal->external for field LANGUAGENAME
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_MMPUR_OA_S_UI_PURCTR-LANGUAGENAME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MMPUR_OA_S_UI_PURCTR-LANGUAGENAME.
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_OA_S_UI_PURCTR_STR, 
MANDT TYPE STRING,
PURCHASECONTRACT TYPE STRING,
PURCHASECONTRACTTYPE TYPE STRING,
PURCHASINGORGANIZATION TYPE STRING,
PURCHASINGGROUP TYPE STRING,
DOCUMENTCURRENCY TYPE STRING,
COMPANYCODE TYPE STRING,
INCOTERMSCLASSIFICATION TYPE STRING,
INCOTERMSTRANSFERLOCATION TYPE STRING,
PAYMENTTERMS TYPE STRING,
CASHDISCOUNT1DAYS TYPE STRING,
CASHDISCOUNT2DAYS TYPE STRING,
NETPAYMENTDAYS TYPE STRING,
CASHDISCOUNT1PERCENT TYPE STRING,
CASHDISCOUNT2PERCENT TYPE STRING,
NUMBEROFRECORDS TYPE STRING,
SUPPLIER TYPE STRING,
MATERIAL TYPE STRING,
PURCHASINGDOCUMENTTYPENAME TYPE STRING,
LANGUAGE TYPE STRING,
LANGUAGECODE TYPE STRING,
VALIDITYSTARTDATE TYPE STRING,
VALIDITYENDDATE TYPE STRING,
VALIDITYSTATUS TYPE STRING,
RELEASECODE TYPE STRING,
PURCHASECONTRACTTARGETAMOUNT TYPE STRING,
USERID TYPE STRING,
USERNAME TYPE STRING,
TOTALNETAMOUNT TYPE STRING,
CREATIONDATE TYPE STRING,
LANGUAGENAME TYPE STRING,
PURCHASINGORGANIZATIONNAME TYPE STRING,
PURCHASINGGROUPNAME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MMPUR_OA_S_UI_PURCTR_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_OA_S_UI_PURCTR_STR-MANDT sy-vline 
WA_MMPUR_OA_S_UI_PURCTR_STR-PURCHASECONTRACT sy-vline 
WA_MMPUR_OA_S_UI_PURCTR_STR-PURCHASECONTRACTTYPE sy-vline 
WA_MMPUR_OA_S_UI_PURCTR_STR-PURCHASINGORGANIZATION sy-vline 
WA_MMPUR_OA_S_UI_PURCTR_STR-PURCHASINGGROUP sy-vline 
WA_MMPUR_OA_S_UI_PURCTR_STR-DOCUMENTCURRENCY sy-vline 
WA_MMPUR_OA_S_UI_PURCTR_STR-COMPANYCODE sy-vline 
WA_MMPUR_OA_S_UI_PURCTR_STR-INCOTERMSCLASSIFICATION sy-vline 
WA_MMPUR_OA_S_UI_PURCTR_STR-INCOTERMSTRANSFERLOCATION sy-vline 
WA_MMPUR_OA_S_UI_PURCTR_STR-PAYMENTTERMS sy-vline 
WA_MMPUR_OA_S_UI_PURCTR_STR-CASHDISCOUNT1DAYS sy-vline 
WA_MMPUR_OA_S_UI_PURCTR_STR-CASHDISCOUNT2DAYS sy-vline 
WA_MMPUR_OA_S_UI_PURCTR_STR-NETPAYMENTDAYS sy-vline 
WA_MMPUR_OA_S_UI_PURCTR_STR-CASHDISCOUNT1PERCENT sy-vline 
WA_MMPUR_OA_S_UI_PURCTR_STR-CASHDISCOUNT2PERCENT sy-vline 
WA_MMPUR_OA_S_UI_PURCTR_STR-NUMBEROFRECORDS sy-vline 
WA_MMPUR_OA_S_UI_PURCTR_STR-SUPPLIER sy-vline 
WA_MMPUR_OA_S_UI_PURCTR_STR-MATERIAL sy-vline 
WA_MMPUR_OA_S_UI_PURCTR_STR-PURCHASINGDOCUMENTTYPENAME sy-vline 
WA_MMPUR_OA_S_UI_PURCTR_STR-LANGUAGE sy-vline 
WA_MMPUR_OA_S_UI_PURCTR_STR-LANGUAGECODE sy-vline 
WA_MMPUR_OA_S_UI_PURCTR_STR-VALIDITYSTARTDATE sy-vline 
WA_MMPUR_OA_S_UI_PURCTR_STR-VALIDITYENDDATE sy-vline 
WA_MMPUR_OA_S_UI_PURCTR_STR-VALIDITYSTATUS sy-vline 
WA_MMPUR_OA_S_UI_PURCTR_STR-RELEASECODE sy-vline 
WA_MMPUR_OA_S_UI_PURCTR_STR-PURCHASECONTRACTTARGETAMOUNT sy-vline 
WA_MMPUR_OA_S_UI_PURCTR_STR-USERID sy-vline 
WA_MMPUR_OA_S_UI_PURCTR_STR-USERNAME sy-vline 
WA_MMPUR_OA_S_UI_PURCTR_STR-TOTALNETAMOUNT sy-vline 
WA_MMPUR_OA_S_UI_PURCTR_STR-CREATIONDATE sy-vline 
WA_MMPUR_OA_S_UI_PURCTR_STR-LANGUAGENAME sy-vline 
WA_MMPUR_OA_S_UI_PURCTR_STR-PURCHASINGORGANIZATIONNAME sy-vline 
WA_MMPUR_OA_S_UI_PURCTR_STR-PURCHASINGGROUPNAME sy-vline      INTO ld_text SEPARATED BY SPACE.

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