ABAP Select data from SAP table CNV_PE_S_S4_TL_MPACK into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP CNV_PE_S_S4_TL_MPACK 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 CNV_PE_S_S4_TL_MPACK. 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 CNV_PE_S_S4_TL_MPACK 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_CNV_PE_S_S4_TL_MPACK TYPE STANDARD TABLE OF CNV_PE_S_S4_TL_MPACK,
      WA_CNV_PE_S_S4_TL_MPACK TYPE CNV_PE_S_S4_TL_MPACK,
      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: <CNV_PE_S_S4_TL_MPACK> TYPE CNV_PE_S_S4_TL_MPACK.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_CNV_PE_S_S4_TL_MPACK.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM CNV_PE_S_S4_TL_MPACK
  INTO TABLE IT_CNV_PE_S_S4_TL_MPACK.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CNV_PE_S_S4_TL_MPACK
*  INTO TABLE @DATA(IT_CNV_PE_S_S4_TL_MPACK2).
*--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_CNV_PE_S_S4_TL_MPACK INDEX 1 INTO DATA(WA_CNV_PE_S_S4_TL_MPACK2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_CNV_PE_S_S4_TL_MPACK ASSIGNING <CNV_PE_S_S4_TL_MPACK>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CNV_PE_S_S4_TL_MPACK>-PLNTY = 1.
<CNV_PE_S_S4_TL_MPACK>-PLNNR = 1.
<CNV_PE_S_S4_TL_MPACK>-PLNAL = 1.
<CNV_PE_S_S4_TL_MPACK>-PLNKN = 1.
<CNV_PE_S_S4_TL_MPACK>-PAKET = 1.

ENDLOOP.

LOOP AT IT_CNV_PE_S_S4_TL_MPACK INTO WA_CNV_PE_S_S4_TL_MPACK.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CNV_PE_S_S4_TL_MPACK-VORNR, sy-vline,
  WA_CNV_PE_S_S4_TL_MPACK-STRAT, sy-vline,
  WA_CNV_PE_S_S4_TL_MPACK-AENNR, sy-vline,
  WA_CNV_PE_S_S4_TL_MPACK-DATUV, sy-vline,
  WA_CNV_PE_S_S4_TL_MPACK-LOEKZ, sy-vline,
ENDLOOP.
   
*Add any further fields from structure WA_CNV_PE_S_S4_TL_MPACK 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_CNV_PE_S_S4_TL_MPACK 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_CNV_PE_S_S4_TL_MPACK INTO WA_CNV_PE_S_S4_TL_MPACK.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_CNV_PE_S_S4_TL_MPACK_STR, 
PLNTY TYPE STRING,
PLNNR TYPE STRING,
PLNAL TYPE STRING,
PLNKN TYPE STRING,
PAKET TYPE STRING,
VORNR TYPE STRING,
STRAT TYPE STRING,
AENNR TYPE STRING,
DATUV TYPE STRING,
LOEKZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CNV_PE_S_S4_TL_MPACK_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_CNV_PE_S_S4_TL_MPACK_STR-PLNTY sy-vline 
WA_CNV_PE_S_S4_TL_MPACK_STR-PLNNR sy-vline 
WA_CNV_PE_S_S4_TL_MPACK_STR-PLNAL sy-vline 
WA_CNV_PE_S_S4_TL_MPACK_STR-PLNKN sy-vline 
WA_CNV_PE_S_S4_TL_MPACK_STR-PAKET sy-vline 
WA_CNV_PE_S_S4_TL_MPACK_STR-VORNR sy-vline 
WA_CNV_PE_S_S4_TL_MPACK_STR-STRAT sy-vline 
WA_CNV_PE_S_S4_TL_MPACK_STR-AENNR sy-vline 
WA_CNV_PE_S_S4_TL_MPACK_STR-DATUV sy-vline 
WA_CNV_PE_S_S4_TL_MPACK_STR-LOEKZ sy-vline      INTO ld_text SEPARATED BY SPACE.

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