ABAP Select data from SAP table ROIUX1_DSP_RSG into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP ROIUX1_DSP_RSG 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 ROIUX1_DSP_RSG. 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 ROIUX1_DSP_RSG 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_ROIUX1_DSP_RSG TYPE STANDARD TABLE OF ROIUX1_DSP_RSG,
      WA_ROIUX1_DSP_RSG TYPE ROIUX1_DSP_RSG,
      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: <ROIUX1_DSP_RSG> TYPE ROIUX1_DSP_RSG.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_ROIUX1_DSP_RSG.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM ROIUX1_DSP_RSG
  INTO TABLE IT_ROIUX1_DSP_RSG.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ROIUX1_DSP_RSG
*  INTO TABLE @DATA(IT_ROIUX1_DSP_RSG2).
*--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_ROIUX1_DSP_RSG INDEX 1 INTO DATA(WA_ROIUX1_DSP_RSG2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_ROIUX1_DSP_RSG ASSIGNING <ROIUX1_DSP_RSG>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ROIUX1_DSP_RSG>-MANDT = 1.
<ROIUX1_DSP_RSG>-AGENCY = 1.
<ROIUX1_DSP_RSG>-OGIND = 1.
<ROIUX1_DSP_RSG>-RSG = 1.
<ROIUX1_DSP_RSG>-EFF_FROM = 1.

ENDLOOP.

LOOP AT IT_ROIUX1_DSP_RSG INTO WA_ROIUX1_DSP_RSG.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ROIUX1_DSP_RSG-EFF_TO, sy-vline,
  WA_ROIUX1_DSP_RSG-BUKRS, sy-vline,
  WA_ROIUX1_DSP_RSG-RPT_COMP, sy-vline,
  WA_ROIUX1_DSP_RSG-FED_ID, sy-vline,
  WA_ROIUX1_DSP_RSG-AGENCY_ID, sy-vline,
  WA_ROIUX1_DSP_RSG-REF_NO, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ROIUX1_DSP_RSG 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_ROIUX1_DSP_RSG 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_ROIUX1_DSP_RSG INTO WA_ROIUX1_DSP_RSG.


*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_ROIUX1_DSP_RSG_STR, 
MANDT TYPE STRING,
AGENCY TYPE STRING,
OGIND TYPE STRING,
RSG TYPE STRING,
EFF_FROM TYPE STRING,
EFF_TO TYPE STRING,
BUKRS TYPE STRING,
RPT_COMP TYPE STRING,
FED_ID TYPE STRING,
AGENCY_ID TYPE STRING,
REF_NO TYPE STRING,
TEL_NO TYPE STRING,
CONTACT_DET1 TYPE STRING,
CONTACT_DET2 TYPE STRING,
INACTIVE_FLAG TYPE STRING,
USERNAME TYPE STRING,
TIMESTAMP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ROIUX1_DSP_RSG_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_ROIUX1_DSP_RSG_STR-MANDT sy-vline 
WA_ROIUX1_DSP_RSG_STR-AGENCY sy-vline 
WA_ROIUX1_DSP_RSG_STR-OGIND sy-vline 
WA_ROIUX1_DSP_RSG_STR-RSG sy-vline 
WA_ROIUX1_DSP_RSG_STR-EFF_FROM sy-vline 
WA_ROIUX1_DSP_RSG_STR-EFF_TO sy-vline 
WA_ROIUX1_DSP_RSG_STR-BUKRS sy-vline 
WA_ROIUX1_DSP_RSG_STR-RPT_COMP sy-vline 
WA_ROIUX1_DSP_RSG_STR-FED_ID sy-vline 
WA_ROIUX1_DSP_RSG_STR-AGENCY_ID sy-vline 
WA_ROIUX1_DSP_RSG_STR-REF_NO sy-vline 
WA_ROIUX1_DSP_RSG_STR-TEL_NO sy-vline 
WA_ROIUX1_DSP_RSG_STR-CONTACT_DET1 sy-vline 
WA_ROIUX1_DSP_RSG_STR-CONTACT_DET2 sy-vline 
WA_ROIUX1_DSP_RSG_STR-INACTIVE_FLAG sy-vline 
WA_ROIUX1_DSP_RSG_STR-USERNAME sy-vline 
WA_ROIUX1_DSP_RSG_STR-TIMESTAMP sy-vline      INTO ld_text SEPARATED BY SPACE.

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