ABAP Select data from SAP table OPDEV into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM OPDEV
*  INTO TABLE @DATA(IT_OPDEV2).
*--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_OPDEV INDEX 1 INTO DATA(WA_OPDEV2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<OPDEV>-MANDT = 1.
<OPDEV>-AUFPL = 1.
<OPDEV>-APLZL = 1.
<OPDEV>-TOLPZ = 1.
<OPDEV>-TOLZT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_OPDEV-TOLZE, sy-vline,
  WA_OPDEV-MAIUS, sy-vline,
  WA_OPDEV-MAIKZ, sy-vline,
  WA_OPDEV-MAIZT, sy-vline,
  WA_OPDEV-MAIZE, sy-vline,
  WA_OPDEV-DATUM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_OPDEV 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_OPDEV 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_OPDEV INTO WA_OPDEV.


*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 TOLZE
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_OPDEV-TOLZE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OPDEV-TOLZE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MAIZE
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_OPDEV-MAIZE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OPDEV-MAIZE.
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_OPDEV_STR, 
MANDT TYPE STRING,
AUFPL TYPE STRING,
APLZL TYPE STRING,
TOLPZ TYPE STRING,
TOLZT TYPE STRING,
TOLZE TYPE STRING,
MAIUS TYPE STRING,
MAIKZ TYPE STRING,
MAIZT TYPE STRING,
MAIZE TYPE STRING,
DATUM TYPE STRING,
UZEIT TYPE STRING,
VGSKZ TYPE STRING,
VGEKZ TYPE STRING,
MAISV TYPE STRING,
MAISE TYPE STRING,
MSCLA TYPE STRING,
MSID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_OPDEV_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_OPDEV_STR-MANDT sy-vline 
WA_OPDEV_STR-AUFPL sy-vline 
WA_OPDEV_STR-APLZL sy-vline 
WA_OPDEV_STR-TOLPZ sy-vline 
WA_OPDEV_STR-TOLZT sy-vline 
WA_OPDEV_STR-TOLZE sy-vline 
WA_OPDEV_STR-MAIUS sy-vline 
WA_OPDEV_STR-MAIKZ sy-vline 
WA_OPDEV_STR-MAIZT sy-vline 
WA_OPDEV_STR-MAIZE sy-vline 
WA_OPDEV_STR-DATUM sy-vline 
WA_OPDEV_STR-UZEIT sy-vline 
WA_OPDEV_STR-VGSKZ sy-vline 
WA_OPDEV_STR-VGEKZ sy-vline 
WA_OPDEV_STR-MAISV sy-vline 
WA_OPDEV_STR-MAISE sy-vline 
WA_OPDEV_STR-MSCLA sy-vline 
WA_OPDEV_STR-MSID sy-vline      INTO ld_text SEPARATED BY SPACE.

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