ABAP Select data from SAP table FAGL_MIG_S_ALV_OPITEMS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FAGL_MIG_S_ALV_OPITEMS
*  INTO TABLE @DATA(IT_FAGL_MIG_S_ALV_OPITEMS2).
*--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_FAGL_MIG_S_ALV_OPITEMS INDEX 1 INTO DATA(WA_FAGL_MIG_S_ALV_OPITEMS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FAGL_MIG_S_ALV_OPITEMS>-MGPLN = 1.
<FAGL_MIG_S_ALV_OPITEMS>-BUKRS = 1.
<FAGL_MIG_S_ALV_OPITEMS>-BELNR = 1.
<FAGL_MIG_S_ALV_OPITEMS>-GJAHR = 1.
<FAGL_MIG_S_ALV_OPITEMS>-BUZEI = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FAGL_MIG_S_ALV_OPITEMS-HKONT, sy-vline,
  WA_FAGL_MIG_S_ALV_OPITEMS-TIMESTAMP, sy-vline,
  WA_FAGL_MIG_S_ALV_OPITEMS-DATE, sy-vline,
  WA_FAGL_MIG_S_ALV_OPITEMS-TIME, sy-vline,
  WA_FAGL_MIG_S_ALV_OPITEMS-STATUS_OPITEM, sy-vline,
  WA_FAGL_MIG_S_ALV_OPITEMS-MSGID, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FAGL_MIG_S_ALV_OPITEMS 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_FAGL_MIG_S_ALV_OPITEMS 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_FAGL_MIG_S_ALV_OPITEMS INTO WA_FAGL_MIG_S_ALV_OPITEMS.


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

*Conversion exit GJAHR, internal->external for field GJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_FAGL_MIG_S_ALV_OPITEMS-GJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FAGL_MIG_S_ALV_OPITEMS-GJAHR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field HKONT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FAGL_MIG_S_ALV_OPITEMS-HKONT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FAGL_MIG_S_ALV_OPITEMS-HKONT.
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_FAGL_MIG_S_ALV_OPITEMS_STR, 
MGPLN TYPE STRING,
BUKRS TYPE STRING,
BELNR TYPE STRING,
GJAHR TYPE STRING,
BUZEI TYPE STRING,
HKONT TYPE STRING,
TIMESTAMP TYPE STRING,
DATE TYPE STRING,
TIME TYPE STRING,
STATUS_OPITEM TYPE STRING,
MSGID TYPE STRING,
MSGNO TYPE STRING,
MSGTY TYPE STRING,
MSGV1 TYPE STRING,
MSGV2 TYPE STRING,
MSGV3 TYPE STRING,
MSGV4 TYPE STRING,
MSGTXT TYPE STRING,
CHECKBOX TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FAGL_MIG_S_ALV_OPITEMS_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_FAGL_MIG_S_ALV_OPITEMS_STR-MGPLN sy-vline 
WA_FAGL_MIG_S_ALV_OPITEMS_STR-BUKRS sy-vline 
WA_FAGL_MIG_S_ALV_OPITEMS_STR-BELNR sy-vline 
WA_FAGL_MIG_S_ALV_OPITEMS_STR-GJAHR sy-vline 
WA_FAGL_MIG_S_ALV_OPITEMS_STR-BUZEI sy-vline 
WA_FAGL_MIG_S_ALV_OPITEMS_STR-HKONT sy-vline 
WA_FAGL_MIG_S_ALV_OPITEMS_STR-TIMESTAMP sy-vline 
WA_FAGL_MIG_S_ALV_OPITEMS_STR-DATE sy-vline 
WA_FAGL_MIG_S_ALV_OPITEMS_STR-TIME sy-vline 
WA_FAGL_MIG_S_ALV_OPITEMS_STR-STATUS_OPITEM sy-vline 
WA_FAGL_MIG_S_ALV_OPITEMS_STR-MSGID sy-vline 
WA_FAGL_MIG_S_ALV_OPITEMS_STR-MSGNO sy-vline 
WA_FAGL_MIG_S_ALV_OPITEMS_STR-MSGTY sy-vline 
WA_FAGL_MIG_S_ALV_OPITEMS_STR-MSGV1 sy-vline 
WA_FAGL_MIG_S_ALV_OPITEMS_STR-MSGV2 sy-vline 
WA_FAGL_MIG_S_ALV_OPITEMS_STR-MSGV3 sy-vline 
WA_FAGL_MIG_S_ALV_OPITEMS_STR-MSGV4 sy-vline 
WA_FAGL_MIG_S_ALV_OPITEMS_STR-MSGTXT sy-vline 
WA_FAGL_MIG_S_ALV_OPITEMS_STR-CHECKBOX sy-vline      INTO ld_text SEPARATED BY SPACE.

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