ABAP Select data from SAP table MMPUR_PRINT_ADDL_BUYING into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP MMPUR_PRINT_ADDL_BUYING 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_PRINT_ADDL_BUYING. 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_PRINT_ADDL_BUYING 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_PRINT_ADDL_BUYING TYPE STANDARD TABLE OF MMPUR_PRINT_ADDL_BUYING,
      WA_MMPUR_PRINT_ADDL_BUYING TYPE MMPUR_PRINT_ADDL_BUYING,
      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_PRINT_ADDL_BUYING> TYPE MMPUR_PRINT_ADDL_BUYING.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MMPUR_PRINT_ADDL_BUYING
*  INTO TABLE @DATA(IT_MMPUR_PRINT_ADDL_BUYING2).
*--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_PRINT_ADDL_BUYING INDEX 1 INTO DATA(WA_MMPUR_PRINT_ADDL_BUYING2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MMPUR_PRINT_ADDL_BUYING>-EBELP = 1.
<MMPUR_PRINT_ADDL_BUYING>-ADDIBELNR = 1.
<MMPUR_PRINT_ADDL_BUYING>-ADDIPOSNR = 1.
<MMPUR_PRINT_ADDL_BUYING>-ADDISTUNR = 1.
<MMPUR_PRINT_ADDL_BUYING>-LFDNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MMPUR_PRINT_ADDL_BUYING-ADDIMATNR, sy-vline,
  WA_MMPUR_PRINT_ADDL_BUYING-ADDIMATKX, sy-vline,
  WA_MMPUR_PRINT_ADDL_BUYING-ADDINUMBER, sy-vline,
  WA_MMPUR_PRINT_ADDL_BUYING-ADDIMEINS, sy-vline,
  WA_MMPUR_PRINT_ADDL_BUYING-ADDIMEINS_TXT, sy-vline,
  WA_MMPUR_PRINT_ADDL_BUYING-ADDIUMREZ, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MMPUR_PRINT_ADDL_BUYING 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_PRINT_ADDL_BUYING 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_PRINT_ADDL_BUYING INTO WA_MMPUR_PRINT_ADDL_BUYING.


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

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

*Conversion exit CUNIT, internal->external for field ADDIMEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_MMPUR_PRINT_ADDL_BUYING-ADDIMEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MMPUR_PRINT_ADDL_BUYING-ADDIMEINS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ISOLA, internal->external for field ADDISPRAS
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_MMPUR_PRINT_ADDL_BUYING-ADDISPRAS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MMPUR_PRINT_ADDL_BUYING-ADDISPRAS.
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_PRINT_ADDL_BUYING_STR, 
EBELP TYPE STRING,
ADDIBELNR TYPE STRING,
ADDIPOSNR TYPE STRING,
ADDISTUNR TYPE STRING,
LFDNR TYPE STRING,
ADDIMATNR TYPE STRING,
ADDIMATKX TYPE STRING,
ADDINUMBER TYPE STRING,
ADDIMEINS TYPE STRING,
ADDIMEINS_TXT TYPE STRING,
ADDIUMREZ TYPE STRING,
ADDIUMREN TYPE STRING,
ADDIFM TYPE STRING,
ADDIFM_TXT TYPE STRING,
ADDIKLART TYPE STRING,
ADDIKLART_TXT TYPE STRING,
ADDICLASS TYPE STRING,
ADDICLASS_TXT TYPE STRING,
ADDIINVOC TYPE STRING,
ADDIINVOC_TXT TYPE STRING,
ADDIIDOC TYPE STRING,
ADDIFRMCUST TYPE STRING,
ADDISPRAS TYPE STRING,
ADDILFDNR TYPE STRING,
ADDITXT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MMPUR_PRINT_ADDL_BUYING_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_PRINT_ADDL_BUYING_STR-EBELP sy-vline 
WA_MMPUR_PRINT_ADDL_BUYING_STR-ADDIBELNR sy-vline 
WA_MMPUR_PRINT_ADDL_BUYING_STR-ADDIPOSNR sy-vline 
WA_MMPUR_PRINT_ADDL_BUYING_STR-ADDISTUNR sy-vline 
WA_MMPUR_PRINT_ADDL_BUYING_STR-LFDNR sy-vline 
WA_MMPUR_PRINT_ADDL_BUYING_STR-ADDIMATNR sy-vline 
WA_MMPUR_PRINT_ADDL_BUYING_STR-ADDIMATKX sy-vline 
WA_MMPUR_PRINT_ADDL_BUYING_STR-ADDINUMBER sy-vline 
WA_MMPUR_PRINT_ADDL_BUYING_STR-ADDIMEINS sy-vline 
WA_MMPUR_PRINT_ADDL_BUYING_STR-ADDIMEINS_TXT sy-vline 
WA_MMPUR_PRINT_ADDL_BUYING_STR-ADDIUMREZ sy-vline 
WA_MMPUR_PRINT_ADDL_BUYING_STR-ADDIUMREN sy-vline 
WA_MMPUR_PRINT_ADDL_BUYING_STR-ADDIFM sy-vline 
WA_MMPUR_PRINT_ADDL_BUYING_STR-ADDIFM_TXT sy-vline 
WA_MMPUR_PRINT_ADDL_BUYING_STR-ADDIKLART sy-vline 
WA_MMPUR_PRINT_ADDL_BUYING_STR-ADDIKLART_TXT sy-vline 
WA_MMPUR_PRINT_ADDL_BUYING_STR-ADDICLASS sy-vline 
WA_MMPUR_PRINT_ADDL_BUYING_STR-ADDICLASS_TXT sy-vline 
WA_MMPUR_PRINT_ADDL_BUYING_STR-ADDIINVOC sy-vline 
WA_MMPUR_PRINT_ADDL_BUYING_STR-ADDIINVOC_TXT sy-vline 
WA_MMPUR_PRINT_ADDL_BUYING_STR-ADDIIDOC sy-vline 
WA_MMPUR_PRINT_ADDL_BUYING_STR-ADDIFRMCUST sy-vline 
WA_MMPUR_PRINT_ADDL_BUYING_STR-ADDISPRAS sy-vline 
WA_MMPUR_PRINT_ADDL_BUYING_STR-ADDILFDNR sy-vline 
WA_MMPUR_PRINT_ADDL_BUYING_STR-ADDITXT sy-vline      INTO ld_text SEPARATED BY SPACE.

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