ABAP Select data from SAP table ROIUOW_TRANSFER_SCHE_A_ALV3 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP ROIUOW_TRANSFER_SCHE_A_ALV3 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 ROIUOW_TRANSFER_SCHE_A_ALV3. 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 ROIUOW_TRANSFER_SCHE_A_ALV3 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_ROIUOW_TRANSFER_SCHE_A_ALV3 TYPE STANDARD TABLE OF ROIUOW_TRANSFER_SCHE_A_ALV3,
      WA_ROIUOW_TRANSFER_SCHE_A_ALV3 TYPE ROIUOW_TRANSFER_SCHE_A_ALV3,
      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: <ROIUOW_TRANSFER_SCHE_A_ALV3> TYPE ROIUOW_TRANSFER_SCHE_A_ALV3.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_ROIUOW_TRANSFER_SCHE_A_ALV3.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM ROIUOW_TRANSFER_SCHE_A_ALV3
  INTO TABLE IT_ROIUOW_TRANSFER_SCHE_A_ALV3.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ROIUOW_TRANSFER_SCHE_A_ALV3
*  INTO TABLE @DATA(IT_ROIUOW_TRANSFER_SCHE_A_ALV32).
*--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_ROIUOW_TRANSFER_SCHE_A_ALV3 INDEX 1 INTO DATA(WA_ROIUOW_TRANSFER_SCHE_A_ALV32).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_ROIUOW_TRANSFER_SCHE_A_ALV3 ASSIGNING <ROIUOW_TRANSFER_SCHE_A_ALV3>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ROIUOW_TRANSFER_SCHE_A_ALV3>-COUNTER1 = 1.
<ROIUOW_TRANSFER_SCHE_A_ALV3>-COUNTER2 = 1.
<ROIUOW_TRANSFER_SCHE_A_ALV3>-DOI = 1.
<ROIUOW_TRANSFER_SCHE_A_ALV3>-DOI_NM = 1.
<ROIUOW_TRANSFER_SCHE_A_ALV3>-STATE = 1.

ENDLOOP.

LOOP AT IT_ROIUOW_TRANSFER_SCHE_A_ALV3 INTO WA_ROIUOW_TRANSFER_SCHE_A_ALV3.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ROIUOW_TRANSFER_SCHE_A_ALV3-SEC_GEO_DESC, sy-vline,
  WA_ROIUOW_TRANSFER_SCHE_A_ALV3-FIELD_NAME, sy-vline,
  WA_ROIUOW_TRANSFER_SCHE_A_ALV3-COMB_PD_DESC, sy-vline,
  WA_ROIUOW_TRANSFER_SCHE_A_ALV3-NAME1, sy-vline,
  WA_ROIUOW_TRANSFER_SCHE_A_ALV3-TR_PART_FACT_PC, sy-vline,
  WA_ROIUOW_TRANSFER_SCHE_A_ALV3-LEGAL_DESC, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ROIUOW_TRANSFER_SCHE_A_ALV3 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_ROIUOW_TRANSFER_SCHE_A_ALV3 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_ROIUOW_TRANSFER_SCHE_A_ALV3 INTO WA_ROIUOW_TRANSFER_SCHE_A_ALV3.


*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 OLD_OWN_NO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ROIUOW_TRANSFER_SCHE_A_ALV3-OLD_OWN_NO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ROIUOW_TRANSFER_SCHE_A_ALV3-OLD_OWN_NO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field OLD_OWN_ISQ_NO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ROIUOW_TRANSFER_SCHE_A_ALV3-OLD_OWN_ISQ_NO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ROIUOW_TRANSFER_SCHE_A_ALV3-OLD_OWN_ISQ_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_ROIUOW_TRANSFER_SCHE_A_ALV3_STR, 
COUNTER1 TYPE STRING,
COUNTER2 TYPE STRING,
DOI TYPE STRING,
DOI_NM TYPE STRING,
STATE TYPE STRING,
SEC_GEO_DESC TYPE STRING,
FIELD_NAME TYPE STRING,
COMB_PD_DESC TYPE STRING,
NAME1 TYPE STRING,
TR_PART_FACT_PC TYPE STRING,
LEGAL_DESC TYPE STRING,
OLD_OWN_NO TYPE STRING,
OLD_OWN_ISQ_NO TYPE STRING,
ADRS_LINE0 TYPE STRING,
OLD_OWN_INT_TYPE TYPE STRING,
OLD_NRI_PC TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ROIUOW_TRANSFER_SCHE_A_ALV3_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_ROIUOW_TRANSFER_SCHE_A_ALV3_STR-COUNTER1 sy-vline 
WA_ROIUOW_TRANSFER_SCHE_A_ALV3_STR-COUNTER2 sy-vline 
WA_ROIUOW_TRANSFER_SCHE_A_ALV3_STR-DOI sy-vline 
WA_ROIUOW_TRANSFER_SCHE_A_ALV3_STR-DOI_NM sy-vline 
WA_ROIUOW_TRANSFER_SCHE_A_ALV3_STR-STATE sy-vline 
WA_ROIUOW_TRANSFER_SCHE_A_ALV3_STR-SEC_GEO_DESC sy-vline 
WA_ROIUOW_TRANSFER_SCHE_A_ALV3_STR-FIELD_NAME sy-vline 
WA_ROIUOW_TRANSFER_SCHE_A_ALV3_STR-COMB_PD_DESC sy-vline 
WA_ROIUOW_TRANSFER_SCHE_A_ALV3_STR-NAME1 sy-vline 
WA_ROIUOW_TRANSFER_SCHE_A_ALV3_STR-TR_PART_FACT_PC sy-vline 
WA_ROIUOW_TRANSFER_SCHE_A_ALV3_STR-LEGAL_DESC sy-vline 
WA_ROIUOW_TRANSFER_SCHE_A_ALV3_STR-OLD_OWN_NO sy-vline 
WA_ROIUOW_TRANSFER_SCHE_A_ALV3_STR-OLD_OWN_ISQ_NO sy-vline 
WA_ROIUOW_TRANSFER_SCHE_A_ALV3_STR-ADRS_LINE0 sy-vline 
WA_ROIUOW_TRANSFER_SCHE_A_ALV3_STR-OLD_OWN_INT_TYPE sy-vline 
WA_ROIUOW_TRANSFER_SCHE_A_ALV3_STR-OLD_NRI_PC sy-vline      INTO ld_text SEPARATED BY SPACE.

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