ABAP Select data from SAP table RCGSELSCR into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RCGSELSCR
*  INTO TABLE @DATA(IT_RCGSELSCR2).
*--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_RCGSELSCR INDEX 1 INTO DATA(WA_RCGSELSCR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RCGSELSCR>-SUBID = 1.
<RCGSELSCR>-SUBCAT = 1.
<RCGSELSCR>-SUBNAM = 1.
<RCGSELSCR>-SUBCHAR = 1.
<RCGSELSCR>-SUBCHARNAM = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RCGSELSCR-AUTHGRP, sy-vline,
  WA_RCGSELSCR-AUTHNAM, sy-vline,
  WA_RCGSELSCR-SEARCHMODE, sy-vline,
  WA_RCGSELSCR-VALDAT, sy-vline,
  WA_RCGSELSCR-VALFR, sy-vline,
  WA_RCGSELSCR-VALTO, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RCGSELSCR 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_RCGSELSCR 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_RCGSELSCR INTO WA_RCGSELSCR.


*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 SPEC1, internal->external for field SUBID
CALL FUNCTION 'CONVERSION_EXIT_SPEC1_OUTPUT'
  EXPORTING
    input =                      WA_RCGSELSCR-SUBID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RCGSELSCR-SUBID.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_RCGSELSCR-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RCGSELSCR-MATNR.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit SCPST, internal->external for field SUBSTAT_ON_SCREEN
CALL FUNCTION 'CONVERSION_EXIT_SCPST_OUTPUT'
  EXPORTING
    input =                      WA_RCGSELSCR-SUBSTAT_ON_SCREEN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RCGSELSCR-SUBSTAT_ON_SCREEN.
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_RCGSELSCR_STR, 
SUBID TYPE STRING,
SUBCAT TYPE STRING,
SUBNAM TYPE STRING,
SUBCHAR TYPE STRING,
SUBCHARNAM TYPE STRING,
AUTHGRP TYPE STRING,
AUTHNAM TYPE STRING,
SEARCHMODE TYPE STRING,
VALDAT TYPE STRING,
VALFR TYPE STRING,
VALTO TYPE STRING,
STATUS TYPE STRING,
UPDNAM TYPE STRING,
UPDDAT TYPE STRING,
AENNR TYPE STRING,
BUTTON TYPE STRING,
NAMCAT TYPE STRING,
NAMLANGU TYPE STRING,
INAME TYPE STRING,
NUMCAT TYPE STRING,
NUMLANGU TYPE STRING,
INUMBER TYPE STRING,
FRMCAT TYPE STRING,
FRMLANGU TYPE STRING,
IFORMULA TYPE STRING,
SLSTID TYPE STRING,
SLSTNAM TYPE STRING,
MATNR TYPE STRING,
MATLANGU TYPE STRING,
MATNAM TYPE STRING,
SUBSTAT TYPE STRING,
SUBSTAT_ON_SCREEN TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RCGSELSCR_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_RCGSELSCR_STR-SUBID sy-vline 
WA_RCGSELSCR_STR-SUBCAT sy-vline 
WA_RCGSELSCR_STR-SUBNAM sy-vline 
WA_RCGSELSCR_STR-SUBCHAR sy-vline 
WA_RCGSELSCR_STR-SUBCHARNAM sy-vline 
WA_RCGSELSCR_STR-AUTHGRP sy-vline 
WA_RCGSELSCR_STR-AUTHNAM sy-vline 
WA_RCGSELSCR_STR-SEARCHMODE sy-vline 
WA_RCGSELSCR_STR-VALDAT sy-vline 
WA_RCGSELSCR_STR-VALFR sy-vline 
WA_RCGSELSCR_STR-VALTO sy-vline 
WA_RCGSELSCR_STR-STATUS sy-vline 
WA_RCGSELSCR_STR-UPDNAM sy-vline 
WA_RCGSELSCR_STR-UPDDAT sy-vline 
WA_RCGSELSCR_STR-AENNR sy-vline 
WA_RCGSELSCR_STR-BUTTON sy-vline 
WA_RCGSELSCR_STR-NAMCAT sy-vline 
WA_RCGSELSCR_STR-NAMLANGU sy-vline 
WA_RCGSELSCR_STR-INAME sy-vline 
WA_RCGSELSCR_STR-NUMCAT sy-vline 
WA_RCGSELSCR_STR-NUMLANGU sy-vline 
WA_RCGSELSCR_STR-INUMBER sy-vline 
WA_RCGSELSCR_STR-FRMCAT sy-vline 
WA_RCGSELSCR_STR-FRMLANGU sy-vline 
WA_RCGSELSCR_STR-IFORMULA sy-vline 
WA_RCGSELSCR_STR-SLSTID sy-vline 
WA_RCGSELSCR_STR-SLSTNAM sy-vline 
WA_RCGSELSCR_STR-MATNR sy-vline 
WA_RCGSELSCR_STR-MATLANGU sy-vline 
WA_RCGSELSCR_STR-MATNAM sy-vline 
WA_RCGSELSCR_STR-SUBSTAT sy-vline 
WA_RCGSELSCR_STR-SUBSTAT_ON_SCREEN sy-vline      INTO ld_text SEPARATED BY SPACE.

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