ABAP Select data from SAP table ROIU_RV_RVT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ROIU_RV_RVT
*  INTO TABLE @DATA(IT_ROIU_RV_RVT2).
*--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_ROIU_RV_RVT INDEX 1 INTO DATA(WA_ROIU_RV_RVT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ROIU_RV_RVT>-MANDT = 1.
<ROIU_RV_RVT>-DN_NO = 1.
<ROIU_RV_RVT>-SALE_DT = 1.
<ROIU_RV_RVT>-WL_NO = 1.
<ROIU_RV_RVT>-WC_NO = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ROIU_RV_RVT-MP_NO, sy-vline,
  WA_ROIU_RV_RVT-MAJPD_CD, sy-vline,
  WA_ROIU_RV_RVT-BUKRS, sy-vline,
  WA_ROIU_RV_RVT-VNAME, sy-vline,
  WA_ROIU_RV_RVT-DOI_NO, sy-vline,
  WA_ROIU_RV_RVT-CT_NO, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ROIU_RV_RVT 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_ROIU_RV_RVT 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_ROIU_RV_RVT INTO WA_ROIU_RV_RVT.


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

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

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

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

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

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

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

*Conversion exit ALPHA, internal->external for field DOC_NO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ROIU_RV_RVT-DOC_NO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ROIU_RV_RVT-DOC_NO.
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_ROIU_RV_RVT_STR, 
MANDT TYPE STRING,
DN_NO TYPE STRING,
SALE_DT TYPE STRING,
WL_NO TYPE STRING,
WC_NO TYPE STRING,
MP_NO TYPE STRING,
MAJPD_CD TYPE STRING,
BUKRS TYPE STRING,
VNAME TYPE STRING,
DOI_NO TYPE STRING,
CT_NO TYPE STRING,
FREQ_CD TYPE STRING,
DOC_NO TYPE STRING,
MP_TYPE_CD TYPE STRING,
FRML_NO TYPE STRING,
REJ_RSN_CD TYPE STRING,
PPA_RSN_CD TYPE STRING,
RPRCS_FL TYPE STRING,
DEL_FL TYPE STRING,
BTCH_PRCS_FL TYPE STRING,
PJOB_NO TYPE STRING,
REJ_PGM_ID TYPE STRING,
CURRENT_STATUS TYPE STRING,
OIU_CRUSER TYPE STRING,
OIU_TIMESTAMP TYPE STRING,
DN_DE TYPE STRING,
WC_DE TYPE STRING,
MP_DE TYPE STRING,
XX_DE TYPE STRING,
PPA_RSN_DE TYPE STRING,
REJ_RSN_DE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ROIU_RV_RVT_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_ROIU_RV_RVT_STR-MANDT sy-vline 
WA_ROIU_RV_RVT_STR-DN_NO sy-vline 
WA_ROIU_RV_RVT_STR-SALE_DT sy-vline 
WA_ROIU_RV_RVT_STR-WL_NO sy-vline 
WA_ROIU_RV_RVT_STR-WC_NO sy-vline 
WA_ROIU_RV_RVT_STR-MP_NO sy-vline 
WA_ROIU_RV_RVT_STR-MAJPD_CD sy-vline 
WA_ROIU_RV_RVT_STR-BUKRS sy-vline 
WA_ROIU_RV_RVT_STR-VNAME sy-vline 
WA_ROIU_RV_RVT_STR-DOI_NO sy-vline 
WA_ROIU_RV_RVT_STR-CT_NO sy-vline 
WA_ROIU_RV_RVT_STR-FREQ_CD sy-vline 
WA_ROIU_RV_RVT_STR-DOC_NO sy-vline 
WA_ROIU_RV_RVT_STR-MP_TYPE_CD sy-vline 
WA_ROIU_RV_RVT_STR-FRML_NO sy-vline 
WA_ROIU_RV_RVT_STR-REJ_RSN_CD sy-vline 
WA_ROIU_RV_RVT_STR-PPA_RSN_CD sy-vline 
WA_ROIU_RV_RVT_STR-RPRCS_FL sy-vline 
WA_ROIU_RV_RVT_STR-DEL_FL sy-vline 
WA_ROIU_RV_RVT_STR-BTCH_PRCS_FL sy-vline 
WA_ROIU_RV_RVT_STR-PJOB_NO sy-vline 
WA_ROIU_RV_RVT_STR-REJ_PGM_ID sy-vline 
WA_ROIU_RV_RVT_STR-CURRENT_STATUS sy-vline 
WA_ROIU_RV_RVT_STR-OIU_CRUSER sy-vline 
WA_ROIU_RV_RVT_STR-OIU_TIMESTAMP sy-vline 
WA_ROIU_RV_RVT_STR-DN_DE sy-vline 
WA_ROIU_RV_RVT_STR-WC_DE sy-vline 
WA_ROIU_RV_RVT_STR-MP_DE sy-vline 
WA_ROIU_RV_RVT_STR-XX_DE sy-vline 
WA_ROIU_RV_RVT_STR-PPA_RSN_DE sy-vline 
WA_ROIU_RV_RVT_STR-REJ_RSN_DE sy-vline      INTO ld_text SEPARATED BY SPACE.

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