ABAP Select data from SAP table MACK3 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP MACK3 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 MACK3. 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 MACK3 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_MACK3 TYPE STANDARD TABLE OF MACK3,
      WA_MACK3 TYPE MACK3,
      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: <MACK3> TYPE MACK3.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_MACK3.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM MACK3
  INTO TABLE IT_MACK3.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MACK3
*  INTO TABLE @DATA(IT_MACK32).
*--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_MACK3 INDEX 1 INTO DATA(WA_MACK32).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_MACK3 ASSIGNING <MACK3>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MACK3>-MEINS = 1.
<MACK3>-SOBSL = 1.
<MACK3>-BSTFE = 1.
<MACK3>-DISST = 1.
<MACK3>-LABOR = 1.

ENDLOOP.

LOOP AT IT_MACK3 INTO WA_MACK3.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MACK3-EKGRP, sy-vline,
  WA_MACK3-DISPO, sy-vline,
  WA_MACK3-FEVOR, sy-vline,
  WA_MACK3-STLAL, sy-vline,
  WA_MACK3-STLAN, sy-vline,
  WA_MACK3-PLNNR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MACK3 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_MACK3 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_MACK3 INTO WA_MACK3.


*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 CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_MACK3-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MACK3-MEINS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field STLAL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MACK3-STLAL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MACK3-STLAL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PLNNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MACK3-PLNNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MACK3-PLNNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field APLAL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MACK3-APLAL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MACK3-APLAL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field STDPD
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_MACK3-STDPD
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MACK3-STDPD.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PRCTR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MACK3-PRCTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MACK3-PRCTR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field /CWM/VALUM
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_MACK3-/CWM/VALUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MACK3-/CWM/VALUM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field /CWM/MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_MACK3-/CWM/MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MACK3-/CWM/MEINS.
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_MACK3_STR, 
MEINS TYPE STRING,
SOBSL TYPE STRING,
BSTFE TYPE STRING,
DISST TYPE STRING,
LABOR TYPE STRING,
EKGRP TYPE STRING,
DISPO TYPE STRING,
FEVOR TYPE STRING,
STLAL TYPE STRING,
STLAN TYPE STRING,
PLNNR TYPE STRING,
APLAL TYPE STRING,
LOSGR TYPE STRING,
SOBSK TYPE STRING,
VERKZ TYPE STRING,
AEKLK TYPE STRING,
AUSSS TYPE STRING,
STDPD TYPE STRING,
CUOBJ TYPE STRING,
KZKFG TYPE STRING,
SAUFT TYPE STRING,
MTART TYPE STRING,
LVORA TYPE STRING,
LVORC TYPE STRING,
ALTSL TYPE STRING,
SFEPR TYPE STRING,
MSTAE TYPE STRING,
MSTDE TYPE STRING,
MMSTA TYPE STRING,
MMSTD TYPE STRING,
KZKUP TYPE STRING,
PLNTY TYPE STRING,
SBDKZ TYPE STRING,
BESKZ TYPE STRING,
PRCTR TYPE STRING,
SPART TYPE STRING,
FVIDK TYPE STRING,
FXPRU TYPE STRING,
KZEFF TYPE STRING,
AHDIS TYPE STRING,
NCOST TYPE STRING,
USEQU TYPE STRING,
PSTAT TYPE STRING,
/CWM/XCWMAT TYPE STRING,
/CWM/VALUM TYPE STRING,
/CWM/MEINS TYPE STRING,
MATKL TYPE STRING,
SCHGT TYPE STRING,
KAUSF TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MACK3_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_MACK3_STR-MEINS sy-vline 
WA_MACK3_STR-SOBSL sy-vline 
WA_MACK3_STR-BSTFE sy-vline 
WA_MACK3_STR-DISST sy-vline 
WA_MACK3_STR-LABOR sy-vline 
WA_MACK3_STR-EKGRP sy-vline 
WA_MACK3_STR-DISPO sy-vline 
WA_MACK3_STR-FEVOR sy-vline 
WA_MACK3_STR-STLAL sy-vline 
WA_MACK3_STR-STLAN sy-vline 
WA_MACK3_STR-PLNNR sy-vline 
WA_MACK3_STR-APLAL sy-vline 
WA_MACK3_STR-LOSGR sy-vline 
WA_MACK3_STR-SOBSK sy-vline 
WA_MACK3_STR-VERKZ sy-vline 
WA_MACK3_STR-AEKLK sy-vline 
WA_MACK3_STR-AUSSS sy-vline 
WA_MACK3_STR-STDPD sy-vline 
WA_MACK3_STR-CUOBJ sy-vline 
WA_MACK3_STR-KZKFG sy-vline 
WA_MACK3_STR-SAUFT sy-vline 
WA_MACK3_STR-MTART sy-vline 
WA_MACK3_STR-LVORA sy-vline 
WA_MACK3_STR-LVORC sy-vline 
WA_MACK3_STR-ALTSL sy-vline 
WA_MACK3_STR-SFEPR sy-vline 
WA_MACK3_STR-MSTAE sy-vline 
WA_MACK3_STR-MSTDE sy-vline 
WA_MACK3_STR-MMSTA sy-vline 
WA_MACK3_STR-MMSTD sy-vline 
WA_MACK3_STR-KZKUP sy-vline 
WA_MACK3_STR-PLNTY sy-vline 
WA_MACK3_STR-SBDKZ sy-vline 
WA_MACK3_STR-BESKZ sy-vline 
WA_MACK3_STR-PRCTR sy-vline 
WA_MACK3_STR-SPART sy-vline 
WA_MACK3_STR-FVIDK sy-vline 
WA_MACK3_STR-FXPRU sy-vline 
WA_MACK3_STR-KZEFF sy-vline 
WA_MACK3_STR-AHDIS sy-vline 
WA_MACK3_STR-NCOST sy-vline 
WA_MACK3_STR-USEQU sy-vline 
WA_MACK3_STR-PSTAT sy-vline 
WA_MACK3_STR-/CWM/XCWMAT sy-vline 
WA_MACK3_STR-/CWM/VALUM sy-vline 
WA_MACK3_STR-/CWM/MEINS sy-vline 
WA_MACK3_STR-MATKL sy-vline 
WA_MACK3_STR-SCHGT sy-vline 
WA_MACK3_STR-KAUSF sy-vline      INTO ld_text SEPARATED BY SPACE.

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