ABAP Select data from SAP table RCGSTEPIOT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RCGSTEPIOT
*  INTO TABLE @DATA(IT_RCGSTEPIOT2).
*--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_RCGSTEPIOT INDEX 1 INTO DATA(WA_RCGSTEPIOT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RCGSTEPIOT>-MANDT = 1.
<RCGSTEPIOT>-RECN_QUE = 1.
<RCGSTEPIOT>-STEP = 1.
<RCGSTEPIOT>-CRDAT = 1.
<RCGSTEPIOT>-CRNAM = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RCGSTEPIOT-UPDDAT, sy-vline,
  WA_RCGSTEPIOT-UPDNAM, sy-vline,
  WA_RCGSTEPIOT-STEPID, sy-vline,
  WA_RCGSTEPIOT-SELTYP, sy-vline,
  WA_RCGSTEPIOT-REFFLG, sy-vline,
  WA_RCGSTEPIOT-HITLFLG, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RCGSTEPIOT 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_RCGSTEPIOT 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_RCGSTEPIOT INTO WA_RCGSTEPIOT.


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

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

*Conversion exit ALPHA, internal->external for field RECN_COLLISION
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RCGSTEPIOT-RECN_COLLISION
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RCGSTEPIOT-RECN_COLLISION.
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_RCGSTEPIOT_STR, 
MANDT TYPE STRING,
RECN_QUE TYPE STRING,
STEP TYPE STRING,
CRDAT TYPE STRING,
CRNAM TYPE STRING,
UPDDAT TYPE STRING,
UPDNAM TYPE STRING,
STEPID TYPE STRING,
SELTYP TYPE STRING,
REFFLG TYPE STRING,
HITLFLG TYPE STRING,
RECN_GRP TYPE STRING,
INTFLG TYPE STRING,
LEVL TYPE STRING,
OBJTYPE TYPE STRING,
MARKFLG TYPE STRING,
SELEFLG TYPE STRING,
LINENO TYPE STRING,
LINEMOD TYPE STRING,
CHCOFLG TYPE STRING,
LOCKMOD TYPE STRING,
INTRFLG TYPE STRING,
INITFLG TYPE STRING,
EXTNFLG TYPE STRING,
REFIFLG TYPE STRING,
NEGFLG TYPE STRING,
RECN_COLLISION TYPE STRING,
OBJID TYPE STRING,
GRPID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RCGSTEPIOT_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_RCGSTEPIOT_STR-MANDT sy-vline 
WA_RCGSTEPIOT_STR-RECN_QUE sy-vline 
WA_RCGSTEPIOT_STR-STEP sy-vline 
WA_RCGSTEPIOT_STR-CRDAT sy-vline 
WA_RCGSTEPIOT_STR-CRNAM sy-vline 
WA_RCGSTEPIOT_STR-UPDDAT sy-vline 
WA_RCGSTEPIOT_STR-UPDNAM sy-vline 
WA_RCGSTEPIOT_STR-STEPID sy-vline 
WA_RCGSTEPIOT_STR-SELTYP sy-vline 
WA_RCGSTEPIOT_STR-REFFLG sy-vline 
WA_RCGSTEPIOT_STR-HITLFLG sy-vline 
WA_RCGSTEPIOT_STR-RECN_GRP sy-vline 
WA_RCGSTEPIOT_STR-INTFLG sy-vline 
WA_RCGSTEPIOT_STR-LEVL sy-vline 
WA_RCGSTEPIOT_STR-OBJTYPE sy-vline 
WA_RCGSTEPIOT_STR-MARKFLG sy-vline 
WA_RCGSTEPIOT_STR-SELEFLG sy-vline 
WA_RCGSTEPIOT_STR-LINENO sy-vline 
WA_RCGSTEPIOT_STR-LINEMOD sy-vline 
WA_RCGSTEPIOT_STR-CHCOFLG sy-vline 
WA_RCGSTEPIOT_STR-LOCKMOD sy-vline 
WA_RCGSTEPIOT_STR-INTRFLG sy-vline 
WA_RCGSTEPIOT_STR-INITFLG sy-vline 
WA_RCGSTEPIOT_STR-EXTNFLG sy-vline 
WA_RCGSTEPIOT_STR-REFIFLG sy-vline 
WA_RCGSTEPIOT_STR-NEGFLG sy-vline 
WA_RCGSTEPIOT_STR-RECN_COLLISION sy-vline 
WA_RCGSTEPIOT_STR-OBJID sy-vline 
WA_RCGSTEPIOT_STR-GRPID sy-vline      INTO ld_text SEPARATED BY SPACE.

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