ABAP Select data from SAP table ICL_WC_RWB_GUI_C into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ICL_WC_RWB_GUI_C
*  INTO TABLE @DATA(IT_ICL_WC_RWB_GUI_C2).
*--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_ICL_WC_RWB_GUI_C INDEX 1 INTO DATA(WA_ICL_WC_RWB_GUI_C2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ICL_WC_RWB_GUI_C>-STATUS = 1.
<ICL_WC_RWB_GUI_C>-RELEASEID = 1.
<ICL_WC_RWB_GUI_C>-ORIGIN = 1.
<ICL_WC_RWB_GUI_C>-IDENT = 1.
<ICL_WC_RWB_GUI_C>-COUNTRY = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ICL_WC_RWB_GUI_C-REGION, sy-vline,
  WA_ICL_WC_RWB_GUI_C-DISABILITY_CLASS, sy-vline,
  WA_ICL_WC_RWB_GUI_C-CURRENCY, sy-vline,
  WA_ICL_WC_RWB_GUI_C-EFFFROMTIME, sy-vline,
  WA_ICL_WC_RWB_GUI_C-EFFTOTIME, sy-vline,
  WA_ICL_WC_RWB_GUI_C-SAWW, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ICL_WC_RWB_GUI_C 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_ICL_WC_RWB_GUI_C 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_ICL_WC_RWB_GUI_C INTO WA_ICL_WC_RWB_GUI_C.


*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 TSTAM, internal->external for field EFFFROMTIME
CALL FUNCTION 'CONVERSION_EXIT_TSTAM_OUTPUT'
  EXPORTING
    input =                      WA_ICL_WC_RWB_GUI_C-EFFFROMTIME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ICL_WC_RWB_GUI_C-EFFFROMTIME.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TSTAM, internal->external for field EFFTOTIME
CALL FUNCTION 'CONVERSION_EXIT_TSTAM_OUTPUT'
  EXPORTING
    input =                      WA_ICL_WC_RWB_GUI_C-EFFTOTIME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ICL_WC_RWB_GUI_C-EFFTOTIME.
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_ICL_WC_RWB_GUI_C_STR, 
STATUS TYPE STRING,
RELEASEID TYPE STRING,
ORIGIN TYPE STRING,
IDENT TYPE STRING,
COUNTRY TYPE STRING,
REGION TYPE STRING,
DISABILITY_CLASS TYPE STRING,
CURRENCY TYPE STRING,
EFFFROMTIME TYPE STRING,
EFFTOTIME TYPE STRING,
SAWW TYPE STRING,
BENEFIT_RULE TYPE STRING,
MAX_BEN TYPE STRING,
MAX_RULE TYPE STRING,
MIN_BEN TYPE STRING,
MIN_RULE TYPE STRING,
WAITING_PERIOD TYPE STRING,
RETRO_PERIOD TYPE STRING,
MAX_PERIOD TYPE STRING,
MAX_TOTAL TYPE STRING,
FORMULA TYPE STRING,
BEN_CONS TYPE STRING,
CALCINSTR TYPE STRING,
SPOUSE_CHILD_BEN TYPE STRING,
SPOUSE_ONLY_BEN TYPE STRING,
ONE_CHILD_BEN TYPE STRING,
MAX_SPSECHLD_AMT TYPE STRING,
MAX_SPSEONLY_AMT TYPE STRING,
MIN_SPSEONLY_AMT TYPE STRING,
AMOUNT_LIMIT_SC TYPE STRING,
AMOUNT_LIMIT_SO TYPE STRING,
TIME_LIMIT TYPE STRING,
BURIAL_AMOUNT TYPE STRING,
CHILD_MAX_AGE TYPE STRING,
STDNT_MAX_AGE TYPE STRING,
TRANSPORTN_MAX TYPE STRING,
LUMP_SUM TYPE STRING,
FORMULA_DTH TYPE STRING,
TOTAL_SCHED TYPE STRING,
SCH_SERVCATID TYPE STRING,
SCH_SC_VARIANT TYPE STRING,
SCPOSN TYPE STRING,
SCPOSLN TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ICL_WC_RWB_GUI_C_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_ICL_WC_RWB_GUI_C_STR-STATUS sy-vline 
WA_ICL_WC_RWB_GUI_C_STR-RELEASEID sy-vline 
WA_ICL_WC_RWB_GUI_C_STR-ORIGIN sy-vline 
WA_ICL_WC_RWB_GUI_C_STR-IDENT sy-vline 
WA_ICL_WC_RWB_GUI_C_STR-COUNTRY sy-vline 
WA_ICL_WC_RWB_GUI_C_STR-REGION sy-vline 
WA_ICL_WC_RWB_GUI_C_STR-DISABILITY_CLASS sy-vline 
WA_ICL_WC_RWB_GUI_C_STR-CURRENCY sy-vline 
WA_ICL_WC_RWB_GUI_C_STR-EFFFROMTIME sy-vline 
WA_ICL_WC_RWB_GUI_C_STR-EFFTOTIME sy-vline 
WA_ICL_WC_RWB_GUI_C_STR-SAWW sy-vline 
WA_ICL_WC_RWB_GUI_C_STR-BENEFIT_RULE sy-vline 
WA_ICL_WC_RWB_GUI_C_STR-MAX_BEN sy-vline 
WA_ICL_WC_RWB_GUI_C_STR-MAX_RULE sy-vline 
WA_ICL_WC_RWB_GUI_C_STR-MIN_BEN sy-vline 
WA_ICL_WC_RWB_GUI_C_STR-MIN_RULE sy-vline 
WA_ICL_WC_RWB_GUI_C_STR-WAITING_PERIOD sy-vline 
WA_ICL_WC_RWB_GUI_C_STR-RETRO_PERIOD sy-vline 
WA_ICL_WC_RWB_GUI_C_STR-MAX_PERIOD sy-vline 
WA_ICL_WC_RWB_GUI_C_STR-MAX_TOTAL sy-vline 
WA_ICL_WC_RWB_GUI_C_STR-FORMULA sy-vline 
WA_ICL_WC_RWB_GUI_C_STR-BEN_CONS sy-vline 
WA_ICL_WC_RWB_GUI_C_STR-CALCINSTR sy-vline 
WA_ICL_WC_RWB_GUI_C_STR-SPOUSE_CHILD_BEN sy-vline 
WA_ICL_WC_RWB_GUI_C_STR-SPOUSE_ONLY_BEN sy-vline 
WA_ICL_WC_RWB_GUI_C_STR-ONE_CHILD_BEN sy-vline 
WA_ICL_WC_RWB_GUI_C_STR-MAX_SPSECHLD_AMT sy-vline 
WA_ICL_WC_RWB_GUI_C_STR-MAX_SPSEONLY_AMT sy-vline 
WA_ICL_WC_RWB_GUI_C_STR-MIN_SPSEONLY_AMT sy-vline 
WA_ICL_WC_RWB_GUI_C_STR-AMOUNT_LIMIT_SC sy-vline 
WA_ICL_WC_RWB_GUI_C_STR-AMOUNT_LIMIT_SO sy-vline 
WA_ICL_WC_RWB_GUI_C_STR-TIME_LIMIT sy-vline 
WA_ICL_WC_RWB_GUI_C_STR-BURIAL_AMOUNT sy-vline 
WA_ICL_WC_RWB_GUI_C_STR-CHILD_MAX_AGE sy-vline 
WA_ICL_WC_RWB_GUI_C_STR-STDNT_MAX_AGE sy-vline 
WA_ICL_WC_RWB_GUI_C_STR-TRANSPORTN_MAX sy-vline 
WA_ICL_WC_RWB_GUI_C_STR-LUMP_SUM sy-vline 
WA_ICL_WC_RWB_GUI_C_STR-FORMULA_DTH sy-vline 
WA_ICL_WC_RWB_GUI_C_STR-TOTAL_SCHED sy-vline 
WA_ICL_WC_RWB_GUI_C_STR-SCH_SERVCATID sy-vline 
WA_ICL_WC_RWB_GUI_C_STR-SCH_SC_VARIANT sy-vline 
WA_ICL_WC_RWB_GUI_C_STR-SCPOSN sy-vline 
WA_ICL_WC_RWB_GUI_C_STR-SCPOSLN sy-vline      INTO ld_text SEPARATED BY SPACE.

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