ABAP Select data from SAP table RCGSELSCRD into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RCGSELSCRD
*  INTO TABLE @DATA(IT_RCGSELSCRD2).
*--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_RCGSELSCRD INDEX 1 INTO DATA(WA_RCGSELSCRD2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RCGSELSCRD>-NAMCAT = 1.
<RCGSELSCRD>-NAMLANGU = 1.
<RCGSELSCRD>-INAME = 1.
<RCGSELSCRD>-NUMCAT = 1.
<RCGSELSCRD>-NUMLANGU = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RCGSELSCRD-INUMBER, sy-vline,
  WA_RCGSELSCRD-FRMCAT, sy-vline,
  WA_RCGSELSCRD-FRMLANGU, sy-vline,
  WA_RCGSELSCRD-IFORMULA, sy-vline,
  WA_RCGSELSCRD-SLSTID, sy-vline,
  WA_RCGSELSCRD-SLSTNAM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RCGSELSCRD 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_RCGSELSCRD 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_RCGSELSCRD INTO WA_RCGSELSCRD.


*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 NAMLANGU
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_RCGSELSCRD-NAMLANGU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RCGSELSCRD-NAMLANGU.
WRITE:/ 'New Value:', ld_input.

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

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

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

*Conversion exit ISOLA, internal->external for field MATLANGU
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_RCGSELSCRD-MATLANGU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RCGSELSCRD-MATLANGU.
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_RCGSELSCRD_STR, 
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,END OF T_EKKO_STR.
DATA: WA_RCGSELSCRD_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_RCGSELSCRD_STR-NAMCAT sy-vline 
WA_RCGSELSCRD_STR-NAMLANGU sy-vline 
WA_RCGSELSCRD_STR-INAME sy-vline 
WA_RCGSELSCRD_STR-NUMCAT sy-vline 
WA_RCGSELSCRD_STR-NUMLANGU sy-vline 
WA_RCGSELSCRD_STR-INUMBER sy-vline 
WA_RCGSELSCRD_STR-FRMCAT sy-vline 
WA_RCGSELSCRD_STR-FRMLANGU sy-vline 
WA_RCGSELSCRD_STR-IFORMULA sy-vline 
WA_RCGSELSCRD_STR-SLSTID sy-vline 
WA_RCGSELSCRD_STR-SLSTNAM sy-vline 
WA_RCGSELSCRD_STR-MATNR sy-vline 
WA_RCGSELSCRD_STR-MATLANGU sy-vline 
WA_RCGSELSCRD_STR-MATNAM sy-vline      INTO ld_text SEPARATED BY SPACE.

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