ABAP Select data from SAP table RCGWWIGROUP into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RCGWWIGROUP
*  INTO TABLE @DATA(IT_RCGWWIGROUP2).
*--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_RCGWWIGROUP INDEX 1 INTO DATA(WA_RCGWWIGROUP2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RCGWWIGROUP>-ESTCAT = 1.
<RCGWWIGROUP>-ROWMULTIVAL = 1.
<RCGWWIGROUP>-CATUSERDEFTXT = 1.
<RCGWWIGROUP>-VALAREACAT = 1.
<RCGWWIGROUP>-VALAREA = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RCGWWIGROUP-VALLANGU, sy-vline,
  WA_RCGWWIGROUP-TYPE, sy-vline,
  WA_RCGWWIGROUP-SOURCETYPE, sy-vline,
  WA_RCGWWIGROUP-DEPTH, sy-vline,
  WA_RCGWWIGROUP-WITHREC, sy-vline,
  WA_RCGWWIGROUP-RB_NOPARA, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RCGWWIGROUP 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_RCGWWIGROUP 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_RCGWWIGROUP INTO WA_RCGWWIGROUP.


*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 ISOLA, internal->external for field VALLANGU
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_RCGWWIGROUP-VALLANGU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RCGWWIGROUP-VALLANGU.
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_RCGWWIGROUP_STR, 
ESTCAT TYPE STRING,
ROWMULTIVAL TYPE STRING,
CATUSERDEFTXT TYPE STRING,
VALAREACAT TYPE STRING,
VALAREA TYPE STRING,
VALLANGU TYPE STRING,
TYPE TYPE STRING,
SOURCETYPE TYPE STRING,
DEPTH TYPE STRING,
WITHREC TYPE STRING,
RB_NOPARA TYPE STRING,
RB_VALAREACAT TYPE STRING,
RB_VALAREA TYPE STRING,
USEREXITNAME TYPE STRING,
UETYP TYPE STRING,
USEREXIT TYPE STRING,
UETYP2 TYPE STRING,
USEREXTPARA TYPE STRING,
PARAMHIERAR TYPE STRING,
THME_LWDG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RCGWWIGROUP_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_RCGWWIGROUP_STR-ESTCAT sy-vline 
WA_RCGWWIGROUP_STR-ROWMULTIVAL sy-vline 
WA_RCGWWIGROUP_STR-CATUSERDEFTXT sy-vline 
WA_RCGWWIGROUP_STR-VALAREACAT sy-vline 
WA_RCGWWIGROUP_STR-VALAREA sy-vline 
WA_RCGWWIGROUP_STR-VALLANGU sy-vline 
WA_RCGWWIGROUP_STR-TYPE sy-vline 
WA_RCGWWIGROUP_STR-SOURCETYPE sy-vline 
WA_RCGWWIGROUP_STR-DEPTH sy-vline 
WA_RCGWWIGROUP_STR-WITHREC sy-vline 
WA_RCGWWIGROUP_STR-RB_NOPARA sy-vline 
WA_RCGWWIGROUP_STR-RB_VALAREACAT sy-vline 
WA_RCGWWIGROUP_STR-RB_VALAREA sy-vline 
WA_RCGWWIGROUP_STR-USEREXITNAME sy-vline 
WA_RCGWWIGROUP_STR-UETYP sy-vline 
WA_RCGWWIGROUP_STR-USEREXIT sy-vline 
WA_RCGWWIGROUP_STR-UETYP2 sy-vline 
WA_RCGWWIGROUP_STR-USEREXTPARA sy-vline 
WA_RCGWWIGROUP_STR-PARAMHIERAR sy-vline 
WA_RCGWWIGROUP_STR-THME_LWDG sy-vline      INTO ld_text SEPARATED BY SPACE.

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