ABAP Select data from SAP table /SAPAPO/MODE_N into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /SAPAPO/MODE_N 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 /SAPAPO/MODE_N. 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 /SAPAPO/MODE_N 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_/SAPAPO/MODE_N TYPE STANDARD TABLE OF /SAPAPO/MODE_N,
      WA_/SAPAPO/MODE_N TYPE /SAPAPO/MODE_N,
      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: </SAPAPO/MODE_N> TYPE /SAPAPO/MODE_N.

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

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /SAPAPO/MODE_N
  INTO TABLE IT_/SAPAPO/MODE_N.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /SAPAPO/MODE_N
*  INTO TABLE @DATA(IT_/SAPAPO/MODE_N2).
*--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_/SAPAPO/MODE_N INDEX 1 INTO DATA(WA_/SAPAPO/MODE_N2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/SAPAPO/MODE_N ASSIGNING </SAPAPO/MODE_N>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</SAPAPO/MODE_N>-MANDT = 1.
</SAPAPO/MODE_N>-MODEID = 1.
</SAPAPO/MODE_N>-MODUS = 1.
</SAPAPO/MODE_N>-ACTID = 1.
</SAPAPO/MODE_N>-RESID = 1.

ENDLOOP.

LOOP AT IT_/SAPAPO/MODE_N INTO WA_/SAPAPO/MODE_N.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/SAPAPO/MODE_N-UNIT, sy-vline,
  WA_/SAPAPO/MODE_N-DUR1, sy-vline,
  WA_/SAPAPO/MODE_N-DUR2, sy-vline,
  WA_/SAPAPO/MODE_N-PENAL, sy-vline,
  WA_/SAPAPO/MODE_N-TIPP, sy-vline,
  WA_/SAPAPO/MODE_N-PROD_IN_SHIFT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/SAPAPO/MODE_N 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_/SAPAPO/MODE_N 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_/SAPAPO/MODE_N INTO WA_/SAPAPO/MODE_N.


*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 UNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_/SAPAPO/MODE_N-UNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SAPAPO/MODE_N-UNIT.
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_/SAPAPO/MODE_N_STR, 
MANDT TYPE STRING,
MODEID TYPE STRING,
MODUS TYPE STRING,
ACTID TYPE STRING,
RESID TYPE STRING,
UNIT TYPE STRING,
DUR1 TYPE STRING,
DUR2 TYPE STRING,
PENAL TYPE STRING,
TIPP TYPE STRING,
PROD_IN_SHIFT TYPE STRING,
MAX_SHORT_BREAK TYPE STRING,
MODE_PRIO TYPE STRING,
DUR3 TYPE STRING,
BREAK_ALLOWED TYPE STRING,
SLOT_START_GRID TYPE STRING,
MODEID_N TYPE STRING,
RESID_N TYPE STRING,
ACTID_N TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/SAPAPO/MODE_N_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_/SAPAPO/MODE_N_STR-MANDT sy-vline 
WA_/SAPAPO/MODE_N_STR-MODEID sy-vline 
WA_/SAPAPO/MODE_N_STR-MODUS sy-vline 
WA_/SAPAPO/MODE_N_STR-ACTID sy-vline 
WA_/SAPAPO/MODE_N_STR-RESID sy-vline 
WA_/SAPAPO/MODE_N_STR-UNIT sy-vline 
WA_/SAPAPO/MODE_N_STR-DUR1 sy-vline 
WA_/SAPAPO/MODE_N_STR-DUR2 sy-vline 
WA_/SAPAPO/MODE_N_STR-PENAL sy-vline 
WA_/SAPAPO/MODE_N_STR-TIPP sy-vline 
WA_/SAPAPO/MODE_N_STR-PROD_IN_SHIFT sy-vline 
WA_/SAPAPO/MODE_N_STR-MAX_SHORT_BREAK sy-vline 
WA_/SAPAPO/MODE_N_STR-MODE_PRIO sy-vline 
WA_/SAPAPO/MODE_N_STR-DUR3 sy-vline 
WA_/SAPAPO/MODE_N_STR-BREAK_ALLOWED sy-vline 
WA_/SAPAPO/MODE_N_STR-SLOT_START_GRID sy-vline 
WA_/SAPAPO/MODE_N_STR-MODEID_N sy-vline 
WA_/SAPAPO/MODE_N_STR-RESID_N sy-vline 
WA_/SAPAPO/MODE_N_STR-ACTID_N sy-vline      INTO ld_text SEPARATED BY SPACE.

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