ABAP Select data from SAP table ICUST_REQ_OBJS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ICUST_REQ_OBJS
*  INTO TABLE @DATA(IT_ICUST_REQ_OBJS2).
*--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_ICUST_REQ_OBJS INDEX 1 INTO DATA(WA_ICUST_REQ_OBJS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ICUST_REQ_OBJS>-MANDT = 1.
<ICUST_REQ_OBJS>-TRANSPORTREQUESTID = 1.
<ICUST_REQ_OBJS>-TRANSPORTREQUESTOBJECTLINEITEM = 1.
<ICUST_REQ_OBJS>-TRANSPORTREQUESTOBJECTPGMID = 1.
<ICUST_REQ_OBJS>-TRANSPORTREQUESTOBJECTTYPE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ICUST_REQ_OBJS-TRANSPORTREQUESTOBJECTNAME, sy-vline,
  WA_ICUST_REQ_OBJS-TRANSPORTREQUESTOBJECTTYPEDESC, sy-vline,
  WA_ICUST_REQ_OBJS-TRANSPORTREQUESTOBJECTNAMEDESC, sy-vline,
  WA_ICUST_REQ_OBJS-TRANSPORTREQUESTOBJECTFUNC, sy-vline,
  WA_ICUST_REQ_OBJS-TRANSPORTREQUESTOBJECTLOCKFLAG, sy-vline,
  WA_ICUST_REQ_OBJS-TRANSPORTREQUESTOBJECTINFOKEY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ICUST_REQ_OBJS 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_ICUST_REQ_OBJS 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_ICUST_REQ_OBJS INTO WA_ICUST_REQ_OBJS.


*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 ISOLA, internal->external for field TRANSPORTREQUESTOBJECTLANGUAGE
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_ICUST_REQ_OBJS-TRANSPORTREQUESTOBJECTLANGUAGE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ICUST_REQ_OBJS-TRANSPORTREQUESTOBJECTLANGUAGE.
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_ICUST_REQ_OBJS_STR, 
MANDT TYPE STRING,
TRANSPORTREQUESTID TYPE STRING,
TRANSPORTREQUESTOBJECTLINEITEM TYPE STRING,
TRANSPORTREQUESTOBJECTPGMID TYPE STRING,
TRANSPORTREQUESTOBJECTTYPE TYPE STRING,
TRANSPORTREQUESTOBJECTNAME TYPE STRING,
TRANSPORTREQUESTOBJECTTYPEDESC TYPE STRING,
TRANSPORTREQUESTOBJECTNAMEDESC TYPE STRING,
TRANSPORTREQUESTOBJECTFUNC TYPE STRING,
TRANSPORTREQUESTOBJECTLOCKFLAG TYPE STRING,
TRANSPORTREQUESTOBJECTINFOKEY TYPE STRING,
TRANSPORTREQUESTOBJECTLANGUAGE TYPE STRING,
IMGACTIVITY TYPE STRING,
IMGACTIVITYDESCRIPTION TYPE STRING,
TRANSPORTREQUESTSTATUS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ICUST_REQ_OBJS_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_ICUST_REQ_OBJS_STR-MANDT sy-vline 
WA_ICUST_REQ_OBJS_STR-TRANSPORTREQUESTID sy-vline 
WA_ICUST_REQ_OBJS_STR-TRANSPORTREQUESTOBJECTLINEITEM sy-vline 
WA_ICUST_REQ_OBJS_STR-TRANSPORTREQUESTOBJECTPGMID sy-vline 
WA_ICUST_REQ_OBJS_STR-TRANSPORTREQUESTOBJECTTYPE sy-vline 
WA_ICUST_REQ_OBJS_STR-TRANSPORTREQUESTOBJECTNAME sy-vline 
WA_ICUST_REQ_OBJS_STR-TRANSPORTREQUESTOBJECTTYPEDESC sy-vline 
WA_ICUST_REQ_OBJS_STR-TRANSPORTREQUESTOBJECTNAMEDESC sy-vline 
WA_ICUST_REQ_OBJS_STR-TRANSPORTREQUESTOBJECTFUNC sy-vline 
WA_ICUST_REQ_OBJS_STR-TRANSPORTREQUESTOBJECTLOCKFLAG sy-vline 
WA_ICUST_REQ_OBJS_STR-TRANSPORTREQUESTOBJECTINFOKEY sy-vline 
WA_ICUST_REQ_OBJS_STR-TRANSPORTREQUESTOBJECTLANGUAGE sy-vline 
WA_ICUST_REQ_OBJS_STR-IMGACTIVITY sy-vline 
WA_ICUST_REQ_OBJS_STR-IMGACTIVITYDESCRIPTION sy-vline 
WA_ICUST_REQ_OBJS_STR-TRANSPORTREQUESTSTATUS sy-vline      INTO ld_text SEPARATED BY SPACE.

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