ABAP Select data from SAP table ROIO_VG_SCR into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ROIO_VG_SCR
*  INTO TABLE @DATA(IT_ROIO_VG_SCR2).
*--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_ROIO_VG_SCR INDEX 1 INTO DATA(WA_ROIO_VG_SCR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ROIO_VG_SCR>-VGTYP_CD = 1.
<ROIO_VG_SCR>-VOYAGE_NR = 1.
<ROIO_VG_SCR>-BOAT_NAME = 1.
<ROIO_VG_SCR>-VEHICLE = 1.
<ROIO_VG_SCR>-VEH_TEXT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ROIO_VG_SCR-VGSTA_CD, sy-vline,
  WA_ROIO_VG_SCR-VGSTA_TYPE, sy-vline,
  WA_ROIO_VG_SCR-VGSTA_TEXT, sy-vline,
  WA_ROIO_VG_SCR-VGTYP_TEXT, sy-vline,
  WA_ROIO_VG_SCR-CUSTOMS_NR, sy-vline,
  WA_ROIO_VG_SCR-VGCUS_CD, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ROIO_VG_SCR 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_ROIO_VG_SCR 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_ROIO_VG_SCR INTO WA_ROIO_VG_SCR.


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

*Conversion exit ALPHA, internal->external for field VOYAGE_NR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ROIO_VG_SCR-VOYAGE_NR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ROIO_VG_SCR-VOYAGE_NR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VEHICLE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ROIO_VG_SCR-VEHICLE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ROIO_VG_SCR-VEHICLE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VGSTA_CD
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ROIO_VG_SCR-VGSTA_CD
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ROIO_VG_SCR-VGSTA_CD.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field CUSTOMS_NR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ROIO_VG_SCR-CUSTOMS_NR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ROIO_VG_SCR-CUSTOMS_NR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VGCUS_CD
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ROIO_VG_SCR-VGCUS_CD
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ROIO_VG_SCR-VGCUS_CD.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ISOLA, internal->external for field LANGU
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_ROIO_VG_SCR-LANGU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ROIO_VG_SCR-LANGU.
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_ROIO_VG_SCR_STR, 
VGTYP_CD TYPE STRING,
VOYAGE_NR TYPE STRING,
BOAT_NAME TYPE STRING,
VEHICLE TYPE STRING,
VEH_TEXT TYPE STRING,
VGSTA_CD TYPE STRING,
VGSTA_TYPE TYPE STRING,
VGSTA_TEXT TYPE STRING,
VGTYP_TEXT TYPE STRING,
CUSTOMS_NR TYPE STRING,
VGCUS_CD TYPE STRING,
VGCUS_TXT TYPE STRING,
X_COMPLETE TYPE STRING,
XDELT TYPE STRING,
XBLCK TYPE STRING,
XACTV TYPE STRING,
ICON_ID TYPE STRING,
CR_USER TYPE STRING,
CR_TSTMP TYPE STRING,
CH_USER TYPE STRING,
CH_TSTMP TYPE STRING,
LANGU TYPE STRING,
CR_DATE TYPE STRING,
CH_DATE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ROIO_VG_SCR_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_ROIO_VG_SCR_STR-VGTYP_CD sy-vline 
WA_ROIO_VG_SCR_STR-VOYAGE_NR sy-vline 
WA_ROIO_VG_SCR_STR-BOAT_NAME sy-vline 
WA_ROIO_VG_SCR_STR-VEHICLE sy-vline 
WA_ROIO_VG_SCR_STR-VEH_TEXT sy-vline 
WA_ROIO_VG_SCR_STR-VGSTA_CD sy-vline 
WA_ROIO_VG_SCR_STR-VGSTA_TYPE sy-vline 
WA_ROIO_VG_SCR_STR-VGSTA_TEXT sy-vline 
WA_ROIO_VG_SCR_STR-VGTYP_TEXT sy-vline 
WA_ROIO_VG_SCR_STR-CUSTOMS_NR sy-vline 
WA_ROIO_VG_SCR_STR-VGCUS_CD sy-vline 
WA_ROIO_VG_SCR_STR-VGCUS_TXT sy-vline 
WA_ROIO_VG_SCR_STR-X_COMPLETE sy-vline 
WA_ROIO_VG_SCR_STR-XDELT sy-vline 
WA_ROIO_VG_SCR_STR-XBLCK sy-vline 
WA_ROIO_VG_SCR_STR-XACTV sy-vline 
WA_ROIO_VG_SCR_STR-ICON_ID sy-vline 
WA_ROIO_VG_SCR_STR-CR_USER sy-vline 
WA_ROIO_VG_SCR_STR-CR_TSTMP sy-vline 
WA_ROIO_VG_SCR_STR-CH_USER sy-vline 
WA_ROIO_VG_SCR_STR-CH_TSTMP sy-vline 
WA_ROIO_VG_SCR_STR-LANGU sy-vline 
WA_ROIO_VG_SCR_STR-CR_DATE sy-vline 
WA_ROIO_VG_SCR_STR-CH_DATE sy-vline      INTO ld_text SEPARATED BY SPACE.

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