ABAP Select data from SAP table RCGSTIOT into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RCGSTIOT 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 RCGSTIOT. 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 RCGSTIOT 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_RCGSTIOT TYPE STANDARD TABLE OF RCGSTIOT,
      WA_RCGSTIOT TYPE RCGSTIOT,
      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: <RCGSTIOT> TYPE RCGSTIOT.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RCGSTIOT
*  INTO TABLE @DATA(IT_RCGSTIOT2).
*--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_RCGSTIOT INDEX 1 INTO DATA(WA_RCGSTIOT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RCGSTIOT>-MARKFLG = 1.
<RCGSTIOT>-SELEFLG = 1.
<RCGSTIOT>-LINENO = 1.
<RCGSTIOT>-LINEMOD = 1.
<RCGSTIOT>-CHCOFLG = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RCGSTIOT-LOCKMOD, sy-vline,
  WA_RCGSTIOT-INTRFLG, sy-vline,
  WA_RCGSTIOT-MANDT, sy-vline,
  WA_RCGSTIOT-RECN, sy-vline,
  WA_RCGSTIOT-ACTN, sy-vline,
  WA_RCGSTIOT-VALFR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RCGSTIOT 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_RCGSTIOT 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_RCGSTIOT INTO WA_RCGSTIOT.


*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_RCGSTIOT-RECN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RCGSTIOT-RECN.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

*Conversion exit SUBST, internal->external for field SUBSTAT_ON_SCREEN
CALL FUNCTION 'CONVERSION_EXIT_SUBST_OUTPUT'
  EXPORTING
    input =                      WA_RCGSTIOT-SUBSTAT_ON_SCREEN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RCGSTIOT-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_RCGSTIOT_STR, 
MARKFLG TYPE STRING,
SELEFLG TYPE STRING,
LINENO TYPE STRING,
LINEMOD TYPE STRING,
CHCOFLG TYPE STRING,
LOCKMOD TYPE STRING,
INTRFLG TYPE STRING,
MANDT TYPE STRING,
RECN TYPE STRING,
ACTN TYPE STRING,
VALFR TYPE STRING,
VALTO TYPE STRING,
AENNR TYPE STRING,
DELFLG TYPE STRING,
PARKFLG TYPE STRING,
CRDAT TYPE STRING,
CRNAM TYPE STRING,
UPDDAT TYPE STRING,
UPDNAM TYPE STRING,
SRSID TYPE STRING,
OWNID TYPE STRING,
RECNROOT TYPE STRING,
OBJNR TYPE STRING,
SUBSTAT TYPE STRING,
RVLID TYPE STRING,
VACLID TYPE STRING,
PLVAR TYPE STRING,
OTYPE TYPE STRING,
REALO TYPE STRING,
STATUSD TYPE STRING,
VACLNAM TYPE STRING,
RVLNAM TYPE STRING,
RVLTYPE TYPE STRING,
STATUS_ICON TYPE STRING,
STEXT TYPE STRING,
SUBSTAT_ON_SCREEN TYPE STRING,
NAMEMST TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RCGSTIOT_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_RCGSTIOT_STR-MARKFLG sy-vline 
WA_RCGSTIOT_STR-SELEFLG sy-vline 
WA_RCGSTIOT_STR-LINENO sy-vline 
WA_RCGSTIOT_STR-LINEMOD sy-vline 
WA_RCGSTIOT_STR-CHCOFLG sy-vline 
WA_RCGSTIOT_STR-LOCKMOD sy-vline 
WA_RCGSTIOT_STR-INTRFLG sy-vline 
WA_RCGSTIOT_STR-MANDT sy-vline 
WA_RCGSTIOT_STR-RECN sy-vline 
WA_RCGSTIOT_STR-ACTN sy-vline 
WA_RCGSTIOT_STR-VALFR sy-vline 
WA_RCGSTIOT_STR-VALTO sy-vline 
WA_RCGSTIOT_STR-AENNR sy-vline 
WA_RCGSTIOT_STR-DELFLG sy-vline 
WA_RCGSTIOT_STR-PARKFLG sy-vline 
WA_RCGSTIOT_STR-CRDAT sy-vline 
WA_RCGSTIOT_STR-CRNAM sy-vline 
WA_RCGSTIOT_STR-UPDDAT sy-vline 
WA_RCGSTIOT_STR-UPDNAM sy-vline 
WA_RCGSTIOT_STR-SRSID sy-vline 
WA_RCGSTIOT_STR-OWNID sy-vline 
WA_RCGSTIOT_STR-RECNROOT sy-vline 
WA_RCGSTIOT_STR-OBJNR sy-vline 
WA_RCGSTIOT_STR-SUBSTAT sy-vline 
WA_RCGSTIOT_STR-RVLID sy-vline 
WA_RCGSTIOT_STR-VACLID sy-vline 
WA_RCGSTIOT_STR-PLVAR sy-vline 
WA_RCGSTIOT_STR-OTYPE sy-vline 
WA_RCGSTIOT_STR-REALO sy-vline 
WA_RCGSTIOT_STR-STATUSD sy-vline 
WA_RCGSTIOT_STR-VACLNAM sy-vline 
WA_RCGSTIOT_STR-RVLNAM sy-vline 
WA_RCGSTIOT_STR-RVLTYPE sy-vline 
WA_RCGSTIOT_STR-STATUS_ICON sy-vline 
WA_RCGSTIOT_STR-STEXT sy-vline 
WA_RCGSTIOT_STR-SUBSTAT_ON_SCREEN sy-vline 
WA_RCGSTIOT_STR-NAMEMST sy-vline      INTO ld_text SEPARATED BY SPACE.

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