ABAP Select data from SAP table SPAOC_TRV_ITEMIZATION_GROUP into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM SPAOC_TRV_ITEMIZATION_GROUP
*  INTO TABLE @DATA(IT_SPAOC_TRV_ITEMIZATION_GROUP2).
*--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_SPAOC_TRV_ITEMIZATION_GROUP INDEX 1 INTO DATA(WA_SPAOC_TRV_ITEMIZATION_GROUP2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<SPAOC_TRV_ITEMIZATION_GROUP>-ITEMGROUPID = 1.
<SPAOC_TRV_ITEMIZATION_GROUP>-EXPENSEID = 1.
<SPAOC_TRV_ITEMIZATION_GROUP>-EXPENSETYPEID = 1.
<SPAOC_TRV_ITEMIZATION_GROUP>-EXPENSETYPEDESCRIPTION = 1.
<SPAOC_TRV_ITEMIZATION_GROUP>-TOTALAMOUNT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_SPAOC_TRV_ITEMIZATION_GROUP-VALUE, sy-vline,
  WA_SPAOC_TRV_ITEMIZATION_GROUP-CURRENCYCODE, sy-vline,
  WA_SPAOC_TRV_ITEMIZATION_GROUP-DECIMALS, sy-vline,
  WA_SPAOC_TRV_ITEMIZATION_GROUP-CHECKRESULT, sy-vline,
  WA_SPAOC_TRV_ITEMIZATION_GROUP-ISCHANGED, sy-vline,
  WA_SPAOC_TRV_ITEMIZATION_GROUP-DELETEABLE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_SPAOC_TRV_ITEMIZATION_GROUP 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_SPAOC_TRV_ITEMIZATION_GROUP 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_SPAOC_TRV_ITEMIZATION_GROUP INTO WA_SPAOC_TRV_ITEMIZATION_GROUP.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_SPAOC_TRV_ITEMIZATION_GROUP_STR, 
ITEMGROUPID TYPE STRING,
EXPENSEID TYPE STRING,
EXPENSETYPEID TYPE STRING,
EXPENSETYPEDESCRIPTION TYPE STRING,
TOTALAMOUNT TYPE STRING,
VALUE TYPE STRING,
CURRENCYCODE TYPE STRING,
DECIMALS TYPE STRING,
CHECKRESULT TYPE STRING,
ISCHANGED TYPE STRING,
DELETEABLE TYPE STRING,
NAV_ALLOWED TYPE STRING,END OF T_EKKO_STR.
DATA: WA_SPAOC_TRV_ITEMIZATION_GROUP_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_SPAOC_TRV_ITEMIZATION_GROUP_STR-ITEMGROUPID sy-vline 
WA_SPAOC_TRV_ITEMIZATION_GROUP_STR-EXPENSEID sy-vline 
WA_SPAOC_TRV_ITEMIZATION_GROUP_STR-EXPENSETYPEID sy-vline 
WA_SPAOC_TRV_ITEMIZATION_GROUP_STR-EXPENSETYPEDESCRIPTION sy-vline 
WA_SPAOC_TRV_ITEMIZATION_GROUP_STR-TOTALAMOUNT sy-vline 
WA_SPAOC_TRV_ITEMIZATION_GROUP_STR-VALUE sy-vline 
WA_SPAOC_TRV_ITEMIZATION_GROUP_STR-CURRENCYCODE sy-vline 
WA_SPAOC_TRV_ITEMIZATION_GROUP_STR-DECIMALS sy-vline 
WA_SPAOC_TRV_ITEMIZATION_GROUP_STR-CHECKRESULT sy-vline 
WA_SPAOC_TRV_ITEMIZATION_GROUP_STR-ISCHANGED sy-vline 
WA_SPAOC_TRV_ITEMIZATION_GROUP_STR-DELETEABLE sy-vline 
WA_SPAOC_TRV_ITEMIZATION_GROUP_STR-NAV_ALLOWED sy-vline      INTO ld_text SEPARATED BY SPACE.

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