ABAP Select data from SAP table MGV_V_PACKIN into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MGV_V_PACKIN
*  INTO TABLE @DATA(IT_MGV_V_PACKIN2).
*--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_MGV_V_PACKIN INDEX 1 INTO DATA(WA_MGV_V_PACKIN2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MGV_V_PACKIN>-MANDT = 1.
<MGV_V_PACKIN>-PACKNR = 1.
<MGV_V_PACKIN>-HDCOUNT = 1.
<MGV_V_PACKIN>-POBJID = 1.
<MGV_V_PACKIN>-PACKTYP = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MGV_V_PACKIN-PAITEMTYPE, sy-vline,
  WA_MGV_V_PACKIN-MATNR, sy-vline,
  WA_MGV_V_PACKIN-SPRAS, sy-vline,
  WA_MGV_V_PACKIN-CONTENT, sy-vline,
  WA_MGV_V_PACKIN-INDDELKP, sy-vline,
  WA_MGV_V_PACKIN-INDDELPO, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MGV_V_PACKIN 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_MGV_V_PACKIN 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_MGV_V_PACKIN INTO WA_MGV_V_PACKIN.


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

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

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

*Conversion exit MATNL, internal->external for field MATNR_EXT
CALL FUNCTION 'CONVERSION_EXIT_MATNL_OUTPUT'
  EXPORTING
    input =                      WA_MGV_V_PACKIN-MATNR_EXT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MGV_V_PACKIN-MATNR_EXT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATNW, internal->external for field MATNR_VERS
CALL FUNCTION 'CONVERSION_EXIT_MATNW_OUTPUT'
  EXPORTING
    input =                      WA_MGV_V_PACKIN-MATNR_VERS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MGV_V_PACKIN-MATNR_VERS.
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_MGV_V_PACKIN_STR, 
MANDT TYPE STRING,
PACKNR TYPE STRING,
HDCOUNT TYPE STRING,
POBJID TYPE STRING,
PACKTYP TYPE STRING,
PAITEMTYPE TYPE STRING,
MATNR TYPE STRING,
SPRAS TYPE STRING,
CONTENT TYPE STRING,
INDDELKP TYPE STRING,
INDDELPO TYPE STRING,
PACKITEMID TYPE STRING,
ITCOUNT TYPE STRING,
MATNR_EXT TYPE STRING,
MATNR_VERS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MGV_V_PACKIN_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_MGV_V_PACKIN_STR-MANDT sy-vline 
WA_MGV_V_PACKIN_STR-PACKNR sy-vline 
WA_MGV_V_PACKIN_STR-HDCOUNT sy-vline 
WA_MGV_V_PACKIN_STR-POBJID sy-vline 
WA_MGV_V_PACKIN_STR-PACKTYP sy-vline 
WA_MGV_V_PACKIN_STR-PAITEMTYPE sy-vline 
WA_MGV_V_PACKIN_STR-MATNR sy-vline 
WA_MGV_V_PACKIN_STR-SPRAS sy-vline 
WA_MGV_V_PACKIN_STR-CONTENT sy-vline 
WA_MGV_V_PACKIN_STR-INDDELKP sy-vline 
WA_MGV_V_PACKIN_STR-INDDELPO sy-vline 
WA_MGV_V_PACKIN_STR-PACKITEMID sy-vline 
WA_MGV_V_PACKIN_STR-ITCOUNT sy-vline 
WA_MGV_V_PACKIN_STR-MATNR_EXT sy-vline 
WA_MGV_V_PACKIN_STR-MATNR_VERS sy-vline      INTO ld_text SEPARATED BY SPACE.

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