ABAP Select data from SAP table ROIU_WC_DATED into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP ROIU_WC_DATED 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_WC_DATED. 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_WC_DATED 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_WC_DATED TYPE STANDARD TABLE OF ROIU_WC_DATED,
      WA_ROIU_WC_DATED TYPE ROIU_WC_DATED,
      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_WC_DATED> TYPE ROIU_WC_DATED.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ROIU_WC_DATED
*  INTO TABLE @DATA(IT_ROIU_WC_DATED2).
*--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_WC_DATED INDEX 1 INTO DATA(WA_ROIU_WC_DATED2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ROIU_WC_DATED>-WL_NO = 1.
<ROIU_WC_DATED>-WC_NO = 1.
<ROIU_WC_DATED>-WC_NAME = 1.
<ROIU_WC_DATED>-WC_SHTXT = 1.
<ROIU_WC_DATED>-EFF_FROM_DT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ROIU_WC_DATED-EFF_TO_DT, sy-vline,
  WA_ROIU_WC_DATED-NEXT_EFF_FROM_DT, sy-vline,
  WA_ROIU_WC_DATED-NEXT_EFF_TO_DT, sy-vline,
  WA_ROIU_WC_DATED-PREV_EFF_FROM_DT, sy-vline,
  WA_ROIU_WC_DATED-REF_WL_NO, sy-vline,
  WA_ROIU_WC_DATED-REF_WC_NO, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ROIU_WC_DATED 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_WC_DATED 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_WC_DATED INTO WA_ROIU_WC_DATED.


*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 WL_NO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ROIU_WC_DATED-WL_NO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ROIU_WC_DATED-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_WC_DATED-WC_NO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ROIU_WC_DATED-WC_NO.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit ABPSP, internal->external for field PSPNR
CALL FUNCTION 'CONVERSION_EXIT_ABPSP_OUTPUT'
  EXPORTING
    input =                      WA_ROIU_WC_DATED-PSPNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ROIU_WC_DATED-PSPNR.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ALPHA, internal->external for field COST_CENTER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ROIU_WC_DATED-COST_CENTER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ROIU_WC_DATED-COST_CENTER.
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_WC_DATED_STR, 
WL_NO TYPE STRING,
WC_NO TYPE STRING,
WC_NAME TYPE STRING,
WC_SHTXT TYPE STRING,
EFF_FROM_DT TYPE STRING,
EFF_TO_DT TYPE STRING,
NEXT_EFF_FROM_DT TYPE STRING,
NEXT_EFF_TO_DT TYPE STRING,
PREV_EFF_FROM_DT TYPE STRING,
REF_WL_NO TYPE STRING,
REF_WC_NO TYPE STRING,
REF_WC_NAME TYPE STRING,
REF_EFF_FROM_DT TYPE STRING,
PSPNR TYPE STRING,
AL_FL TYPE STRING,
HVCLS TYPE STRING,
CRUD_TYPE_CD TYPE STRING,
OP_FL TYPE STRING,
CONTN_FL TYPE STRING,
WL_COUNT TYPE STRING,
PRD_MTH_CD TYPE STRING,
EXT_LOSS_PC TYPE STRING,
WL_CLASS_CD TYPE STRING,
CRTYP_DE TYPE STRING,
PRD_MTH_DE TYPE STRING,
WL_CLASS_DE TYPE STRING,
STATUS_CD TYPE STRING,
STATUS_DE TYPE STRING,
OPERATOR TYPE STRING,
OPERATOR_DE TYPE STRING,
MCOD1 TYPE STRING,
BUKRS TYPE STRING,
BUTXT TYPE STRING,
COST_CENTER TYPE STRING,
COST_CENTER_DE TYPE STRING,
KOSTL_KTEXT TYPE STRING,
OIU_CRUSER TYPE STRING,
OIU_TIMESTAMP TYPE STRING,
XXDBACTION TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ROIU_WC_DATED_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_WC_DATED_STR-WL_NO sy-vline 
WA_ROIU_WC_DATED_STR-WC_NO sy-vline 
WA_ROIU_WC_DATED_STR-WC_NAME sy-vline 
WA_ROIU_WC_DATED_STR-WC_SHTXT sy-vline 
WA_ROIU_WC_DATED_STR-EFF_FROM_DT sy-vline 
WA_ROIU_WC_DATED_STR-EFF_TO_DT sy-vline 
WA_ROIU_WC_DATED_STR-NEXT_EFF_FROM_DT sy-vline 
WA_ROIU_WC_DATED_STR-NEXT_EFF_TO_DT sy-vline 
WA_ROIU_WC_DATED_STR-PREV_EFF_FROM_DT sy-vline 
WA_ROIU_WC_DATED_STR-REF_WL_NO sy-vline 
WA_ROIU_WC_DATED_STR-REF_WC_NO sy-vline 
WA_ROIU_WC_DATED_STR-REF_WC_NAME sy-vline 
WA_ROIU_WC_DATED_STR-REF_EFF_FROM_DT sy-vline 
WA_ROIU_WC_DATED_STR-PSPNR sy-vline 
WA_ROIU_WC_DATED_STR-AL_FL sy-vline 
WA_ROIU_WC_DATED_STR-HVCLS sy-vline 
WA_ROIU_WC_DATED_STR-CRUD_TYPE_CD sy-vline 
WA_ROIU_WC_DATED_STR-OP_FL sy-vline 
WA_ROIU_WC_DATED_STR-CONTN_FL sy-vline 
WA_ROIU_WC_DATED_STR-WL_COUNT sy-vline 
WA_ROIU_WC_DATED_STR-PRD_MTH_CD sy-vline 
WA_ROIU_WC_DATED_STR-EXT_LOSS_PC sy-vline 
WA_ROIU_WC_DATED_STR-WL_CLASS_CD sy-vline 
WA_ROIU_WC_DATED_STR-CRTYP_DE sy-vline 
WA_ROIU_WC_DATED_STR-PRD_MTH_DE sy-vline 
WA_ROIU_WC_DATED_STR-WL_CLASS_DE sy-vline 
WA_ROIU_WC_DATED_STR-STATUS_CD sy-vline 
WA_ROIU_WC_DATED_STR-STATUS_DE sy-vline 
WA_ROIU_WC_DATED_STR-OPERATOR sy-vline 
WA_ROIU_WC_DATED_STR-OPERATOR_DE sy-vline 
WA_ROIU_WC_DATED_STR-MCOD1 sy-vline 
WA_ROIU_WC_DATED_STR-BUKRS sy-vline 
WA_ROIU_WC_DATED_STR-BUTXT sy-vline 
WA_ROIU_WC_DATED_STR-COST_CENTER sy-vline 
WA_ROIU_WC_DATED_STR-COST_CENTER_DE sy-vline 
WA_ROIU_WC_DATED_STR-KOSTL_KTEXT sy-vline 
WA_ROIU_WC_DATED_STR-OIU_CRUSER sy-vline 
WA_ROIU_WC_DATED_STR-OIU_TIMESTAMP sy-vline 
WA_ROIU_WC_DATED_STR-XXDBACTION sy-vline      INTO ld_text SEPARATED BY SPACE.

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