ABAP Select data from SAP table RCGSELSCRH into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RCGSELSCRH
*  INTO TABLE @DATA(IT_RCGSELSCRH2).
*--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_RCGSELSCRH INDEX 1 INTO DATA(WA_RCGSELSCRH2).


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

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

ENDLOOP.

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

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


*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_RCGSELSCRH-SUBID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RCGSELSCRH-SUBID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field AENNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RCGSELSCRH-AENNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RCGSELSCRH-AENNR.
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_RCGSELSCRH_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,END OF T_EKKO_STR.
DATA: WA_RCGSELSCRH_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_RCGSELSCRH_STR-SUBID sy-vline 
WA_RCGSELSCRH_STR-SUBCAT sy-vline 
WA_RCGSELSCRH_STR-SUBNAM sy-vline 
WA_RCGSELSCRH_STR-SUBCHAR sy-vline 
WA_RCGSELSCRH_STR-SUBCHARNAM sy-vline 
WA_RCGSELSCRH_STR-AUTHGRP sy-vline 
WA_RCGSELSCRH_STR-AUTHNAM sy-vline 
WA_RCGSELSCRH_STR-SEARCHMODE sy-vline 
WA_RCGSELSCRH_STR-VALDAT sy-vline 
WA_RCGSELSCRH_STR-VALFR sy-vline 
WA_RCGSELSCRH_STR-VALTO sy-vline 
WA_RCGSELSCRH_STR-STATUS sy-vline 
WA_RCGSELSCRH_STR-UPDNAM sy-vline 
WA_RCGSELSCRH_STR-UPDDAT sy-vline 
WA_RCGSELSCRH_STR-AENNR sy-vline 
WA_RCGSELSCRH_STR-BUTTON sy-vline      INTO ld_text SEPARATED BY SPACE.

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