ABAP Select data from SAP table MACK4_EXTENDED into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP MACK4_EXTENDED 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 MACK4_EXTENDED. 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 MACK4_EXTENDED 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_MACK4_EXTENDED TYPE STANDARD TABLE OF MACK4_EXTENDED,
      WA_MACK4_EXTENDED TYPE MACK4_EXTENDED,
      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: <MACK4_EXTENDED> TYPE MACK4_EXTENDED.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_MACK4_EXTENDED.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM MACK4_EXTENDED
  INTO TABLE IT_MACK4_EXTENDED.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MACK4_EXTENDED
*  INTO TABLE @DATA(IT_MACK4_EXTENDED2).
*--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_MACK4_EXTENDED INDEX 1 INTO DATA(WA_MACK4_EXTENDED2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_MACK4_EXTENDED ASSIGNING <MACK4_EXTENDED>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MACK4_EXTENDED>-MATNR = 1.
<MACK4_EXTENDED>-BWKEY = 1.
<MACK4_EXTENDED>-LVORM = 1.
<MACK4_EXTENDED>-KALN1 = 1.
<MACK4_EXTENDED>-KALNR = 1.

ENDLOOP.

LOOP AT IT_MACK4_EXTENDED INTO WA_MACK4_EXTENDED.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MACK4_EXTENDED-BWVA1, sy-vline,
  WA_MACK4_EXTENDED-BWVA2, sy-vline,
  WA_MACK4_EXTENDED-KALKZ, sy-vline,
  WA_MACK4_EXTENDED-KALKL, sy-vline,
  WA_MACK4_EXTENDED-KALKV, sy-vline,
  WA_MACK4_EXTENDED-VERS1, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MACK4_EXTENDED 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_MACK4_EXTENDED 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_MACK4_EXTENDED INTO WA_MACK4_EXTENDED.


*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 MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_MACK4_EXTENDED-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MACK4_EXTENDED-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field PDATZ
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_MACK4_EXTENDED-PDATZ
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MACK4_EXTENDED-PDATZ.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field PDATL
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_MACK4_EXTENDED-PDATL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MACK4_EXTENDED-PDATL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field PDATV
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_MACK4_EXTENDED-PDATV
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MACK4_EXTENDED-PDATV.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field LFGJA
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_MACK4_EXTENDED-LFGJA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MACK4_EXTENDED-LFGJA.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field /CWM/VALUM
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_MACK4_EXTENDED-/CWM/VALUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MACK4_EXTENDED-/CWM/VALUM.
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_MACK4_EXTENDED_STR, 
MATNR TYPE STRING,
BWKEY TYPE STRING,
LVORM TYPE STRING,
KALN1 TYPE STRING,
KALNR TYPE STRING,
BWVA1 TYPE STRING,
BWVA2 TYPE STRING,
KALKZ TYPE STRING,
KALKL TYPE STRING,
KALKV TYPE STRING,
VERS1 TYPE STRING,
VERS2 TYPE STRING,
PPRDZ TYPE STRING,
PPRDL TYPE STRING,
PDATZ TYPE STRING,
PDATL TYPE STRING,
ZPLPR TYPE STRING,
FPLPX TYPE STRING,
EKALR TYPE STRING,
KOSGR TYPE STRING,
PEINH TYPE STRING,
VPRSV TYPE STRING,
VERPR TYPE STRING,
STPRS TYPE STRING,
PPRDV TYPE STRING,
PDATV TYPE STRING,
BWVA3 TYPE STRING,
VERS3 TYPE STRING,
LPLPR TYPE STRING,
LPLPX TYPE STRING,
BWTTY TYPE STRING,
BWTAR TYPE STRING,
MLMAA TYPE STRING,
VJPEI TYPE STRING,
FBWST TYPE STRING,
LBWST TYPE STRING,
VBWST TYPE STRING,
XBEWM TYPE STRING,
VPLPR TYPE STRING,
VPLPX TYPE STRING,
LFMON TYPE STRING,
LFGJA TYPE STRING,
/CWM/XCWMAT TYPE STRING,
/CWM/VALUM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MACK4_EXTENDED_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_MACK4_EXTENDED_STR-MATNR sy-vline 
WA_MACK4_EXTENDED_STR-BWKEY sy-vline 
WA_MACK4_EXTENDED_STR-LVORM sy-vline 
WA_MACK4_EXTENDED_STR-KALN1 sy-vline 
WA_MACK4_EXTENDED_STR-KALNR sy-vline 
WA_MACK4_EXTENDED_STR-BWVA1 sy-vline 
WA_MACK4_EXTENDED_STR-BWVA2 sy-vline 
WA_MACK4_EXTENDED_STR-KALKZ sy-vline 
WA_MACK4_EXTENDED_STR-KALKL sy-vline 
WA_MACK4_EXTENDED_STR-KALKV sy-vline 
WA_MACK4_EXTENDED_STR-VERS1 sy-vline 
WA_MACK4_EXTENDED_STR-VERS2 sy-vline 
WA_MACK4_EXTENDED_STR-PPRDZ sy-vline 
WA_MACK4_EXTENDED_STR-PPRDL sy-vline 
WA_MACK4_EXTENDED_STR-PDATZ sy-vline 
WA_MACK4_EXTENDED_STR-PDATL sy-vline 
WA_MACK4_EXTENDED_STR-ZPLPR sy-vline 
WA_MACK4_EXTENDED_STR-FPLPX sy-vline 
WA_MACK4_EXTENDED_STR-EKALR sy-vline 
WA_MACK4_EXTENDED_STR-KOSGR sy-vline 
WA_MACK4_EXTENDED_STR-PEINH sy-vline 
WA_MACK4_EXTENDED_STR-VPRSV sy-vline 
WA_MACK4_EXTENDED_STR-VERPR sy-vline 
WA_MACK4_EXTENDED_STR-STPRS sy-vline 
WA_MACK4_EXTENDED_STR-PPRDV sy-vline 
WA_MACK4_EXTENDED_STR-PDATV sy-vline 
WA_MACK4_EXTENDED_STR-BWVA3 sy-vline 
WA_MACK4_EXTENDED_STR-VERS3 sy-vline 
WA_MACK4_EXTENDED_STR-LPLPR sy-vline 
WA_MACK4_EXTENDED_STR-LPLPX sy-vline 
WA_MACK4_EXTENDED_STR-BWTTY sy-vline 
WA_MACK4_EXTENDED_STR-BWTAR sy-vline 
WA_MACK4_EXTENDED_STR-MLMAA sy-vline 
WA_MACK4_EXTENDED_STR-VJPEI sy-vline 
WA_MACK4_EXTENDED_STR-FBWST sy-vline 
WA_MACK4_EXTENDED_STR-LBWST sy-vline 
WA_MACK4_EXTENDED_STR-VBWST sy-vline 
WA_MACK4_EXTENDED_STR-XBEWM sy-vline 
WA_MACK4_EXTENDED_STR-VPLPR sy-vline 
WA_MACK4_EXTENDED_STR-VPLPX sy-vline 
WA_MACK4_EXTENDED_STR-LFMON sy-vline 
WA_MACK4_EXTENDED_STR-LFGJA sy-vline 
WA_MACK4_EXTENDED_STR-/CWM/XCWMAT sy-vline 
WA_MACK4_EXTENDED_STR-/CWM/VALUM sy-vline      INTO ld_text SEPARATED BY SPACE.

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