ABAP Select data from SAP table RCGAPPLOBJ_IALIOT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RCGAPPLOBJ_IALIOT
*  INTO TABLE @DATA(IT_RCGAPPLOBJ_IALIOT2).
*--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_RCGAPPLOBJ_IALIOT INDEX 1 INTO DATA(WA_RCGAPPLOBJ_IALIOT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RCGAPPLOBJ_IALIOT>-MARKFLG = 1.
<RCGAPPLOBJ_IALIOT>-SELEFLG = 1.
<RCGAPPLOBJ_IALIOT>-LINENO = 1.
<RCGAPPLOBJ_IALIOT>-LINEMOD = 1.
<RCGAPPLOBJ_IALIOT>-CHCOFLG = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RCGAPPLOBJ_IALIOT-LOCKMOD, sy-vline,
  WA_RCGAPPLOBJ_IALIOT-INTRFLG, sy-vline,
  WA_RCGAPPLOBJ_IALIOT-IALID, sy-vline,
  WA_RCGAPPLOBJ_IALIOT-EVDAT, sy-vline,
  WA_RCGAPPLOBJ_IALIOT-EVDESC, sy-vline,
  WA_RCGAPPLOBJ_IALIOT-IATYPE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RCGAPPLOBJ_IALIOT 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_RCGAPPLOBJ_IALIOT 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_RCGAPPLOBJ_IALIOT INTO WA_RCGAPPLOBJ_IALIOT.


*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 CHRID, internal->external for field IALID
CALL FUNCTION 'CONVERSION_EXIT_CHRID_OUTPUT'
  EXPORTING
    input =                      WA_RCGAPPLOBJ_IALIOT-IALID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RCGAPPLOBJ_IALIOT-IALID.
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_RCGAPPLOBJ_IALIOT_STR, 
MARKFLG TYPE STRING,
SELEFLG TYPE STRING,
LINENO TYPE STRING,
LINEMOD TYPE STRING,
CHCOFLG TYPE STRING,
LOCKMOD TYPE STRING,
INTRFLG TYPE STRING,
IALID TYPE STRING,
EVDAT TYPE STRING,
EVDESC TYPE STRING,
IATYPE TYPE STRING,
IATYPETXT TYPE STRING,
FULLNAME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RCGAPPLOBJ_IALIOT_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_RCGAPPLOBJ_IALIOT_STR-MARKFLG sy-vline 
WA_RCGAPPLOBJ_IALIOT_STR-SELEFLG sy-vline 
WA_RCGAPPLOBJ_IALIOT_STR-LINENO sy-vline 
WA_RCGAPPLOBJ_IALIOT_STR-LINEMOD sy-vline 
WA_RCGAPPLOBJ_IALIOT_STR-CHCOFLG sy-vline 
WA_RCGAPPLOBJ_IALIOT_STR-LOCKMOD sy-vline 
WA_RCGAPPLOBJ_IALIOT_STR-INTRFLG sy-vline 
WA_RCGAPPLOBJ_IALIOT_STR-IALID sy-vline 
WA_RCGAPPLOBJ_IALIOT_STR-EVDAT sy-vline 
WA_RCGAPPLOBJ_IALIOT_STR-EVDESC sy-vline 
WA_RCGAPPLOBJ_IALIOT_STR-IATYPE sy-vline 
WA_RCGAPPLOBJ_IALIOT_STR-IATYPETXT sy-vline 
WA_RCGAPPLOBJ_IALIOT_STR-FULLNAME sy-vline      INTO ld_text SEPARATED BY SPACE.

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