ABAP Select data from SAP table RCGIEKEYS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RCGIEKEYS
*  INTO TABLE @DATA(IT_RCGIEKEYS2).
*--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_RCGIEKEYS INDEX 1 INTO DATA(WA_RCGIEKEYS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RCGIEKEYS>-RECN = 1.
<RCGIEKEYS>-RECNROOT = 1.
<RCGIEKEYS>-RECNTPH = 1.
<RCGIEKEYS>-RECNTPS = 1.
<RCGIEKEYS>-RECNTVH = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RCGIEKEYS-RECNTVA, sy-vline,
  WA_RCGIEKEYS-RECNTRI, sy-vline,
  WA_RCGIEKEYS-RECNREF, sy-vline,
  WA_RCGIEKEYS-SLSTID, sy-vline,
  WA_RCGIEKEYS-OBJEK, sy-vline,
  WA_RCGIEKEYS-CATPIN, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RCGIEKEYS 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_RCGIEKEYS 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_RCGIEKEYS INTO WA_RCGIEKEYS.


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

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

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

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

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

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

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

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

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

*Conversion exit ISOLA, internal->external for field LANGU
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_RCGIEKEYS-LANGU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RCGIEKEYS-LANGU.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CHRI3, internal->external for field PHRSEL
CALL FUNCTION 'CONVERSION_EXIT_CHRI3_OUTPUT'
  EXPORTING
    input =                      WA_RCGIEKEYS-PHRSEL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RCGIEKEYS-PHRSEL.
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_RCGIEKEYS_STR, 
RECN TYPE STRING,
RECNROOT TYPE STRING,
RECNTPH TYPE STRING,
RECNTPS TYPE STRING,
RECNTVH TYPE STRING,
RECNTVA TYPE STRING,
RECNTRI TYPE STRING,
RECNREF TYPE STRING,
SLSTID TYPE STRING,
OBJEK TYPE STRING,
CATPIN TYPE STRING,
PHRGRP TYPE STRING,
DOKAR TYPE STRING,
DOKNR TYPE STRING,
DOKVR TYPE STRING,
DOKTL TYPE STRING,
LDELINE TYPE STRING,
LSYTYPE TYPE STRING,
LSYID TYPE STRING,
ESTCAT TYPE STRING,
MENID TYPE STRING,
LANGU TYPE STRING,
ID TYPE STRING,
CLASS TYPE STRING,
CHARACT TYPE STRING,
TXT_ART TYPE STRING,
SRCID TYPE STRING,
POS TYPE STRING,
VALUE TYPE STRING,
PHRSEL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RCGIEKEYS_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_RCGIEKEYS_STR-RECN sy-vline 
WA_RCGIEKEYS_STR-RECNROOT sy-vline 
WA_RCGIEKEYS_STR-RECNTPH sy-vline 
WA_RCGIEKEYS_STR-RECNTPS sy-vline 
WA_RCGIEKEYS_STR-RECNTVH sy-vline 
WA_RCGIEKEYS_STR-RECNTVA sy-vline 
WA_RCGIEKEYS_STR-RECNTRI sy-vline 
WA_RCGIEKEYS_STR-RECNREF sy-vline 
WA_RCGIEKEYS_STR-SLSTID sy-vline 
WA_RCGIEKEYS_STR-OBJEK sy-vline 
WA_RCGIEKEYS_STR-CATPIN sy-vline 
WA_RCGIEKEYS_STR-PHRGRP sy-vline 
WA_RCGIEKEYS_STR-DOKAR sy-vline 
WA_RCGIEKEYS_STR-DOKNR sy-vline 
WA_RCGIEKEYS_STR-DOKVR sy-vline 
WA_RCGIEKEYS_STR-DOKTL sy-vline 
WA_RCGIEKEYS_STR-LDELINE sy-vline 
WA_RCGIEKEYS_STR-LSYTYPE sy-vline 
WA_RCGIEKEYS_STR-LSYID sy-vline 
WA_RCGIEKEYS_STR-ESTCAT sy-vline 
WA_RCGIEKEYS_STR-MENID sy-vline 
WA_RCGIEKEYS_STR-LANGU sy-vline 
WA_RCGIEKEYS_STR-ID sy-vline 
WA_RCGIEKEYS_STR-CLASS sy-vline 
WA_RCGIEKEYS_STR-CHARACT sy-vline 
WA_RCGIEKEYS_STR-TXT_ART sy-vline 
WA_RCGIEKEYS_STR-SRCID sy-vline 
WA_RCGIEKEYS_STR-POS sy-vline 
WA_RCGIEKEYS_STR-VALUE sy-vline 
WA_RCGIEKEYS_STR-PHRSEL sy-vline      INTO ld_text SEPARATED BY SPACE.

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