ABAP Select data from SAP table RCGRHIOT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RCGRHIOT
*  INTO TABLE @DATA(IT_RCGRHIOT2).
*--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_RCGRHIOT INDEX 1 INTO DATA(WA_RCGRHIOT2).


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

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

ENDLOOP.

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

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


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

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

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

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

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

*Conversion exit SPEC1, internal->external for field SUBID
CALL FUNCTION 'CONVERSION_EXIT_SPEC1_OUTPUT'
  EXPORTING
    input =                      WA_RCGRHIOT-SUBID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RCGRHIOT-SUBID.
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_RCGRHIOT_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,
UPDDATS TYPE STRING,
UPDNAMS TYPE STRING,
SUBID TYPE STRING,
SUBCAT TYPE STRING,
AUTHGRP TYPE STRING,
REM TYPE STRING,
SUBCHAR TYPE STRING,
SUBNAM TYPE STRING,
SUBCHARNAM TYPE STRING,
AUTHNAM TYPE STRING,
ADD_INF1 TYPE STRING,
ADD_INF2 TYPE STRING,
ADD_INF3 TYPE STRING,
ADD_INF4 TYPE STRING,
ADD_INF5 TYPE STRING,
ADD_INF6 TYPE STRING,
ADD_INF7 TYPE STRING,
ADD_INF8 TYPE STRING,
ADD_INF9 TYPE STRING,
ADD_INF10 TYPE STRING,
ADD_INF11 TYPE STRING,
ADD_INF12 TYPE STRING,
ADD_INF13 TYPE STRING,
ADD_INF14 TYPE STRING,
ADD_INF15 TYPE STRING,
ADD_INF16 TYPE STRING,
ADD_INF17 TYPE STRING,
ADD_INF18 TYPE STRING,
ADD_INF19 TYPE STRING,
REF_INDIC TYPE STRING,
ERRICON TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RCGRHIOT_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_RCGRHIOT_STR-MARKFLG sy-vline 
WA_RCGRHIOT_STR-SELEFLG sy-vline 
WA_RCGRHIOT_STR-LINENO sy-vline 
WA_RCGRHIOT_STR-LINEMOD sy-vline 
WA_RCGRHIOT_STR-CHCOFLG sy-vline 
WA_RCGRHIOT_STR-LOCKMOD sy-vline 
WA_RCGRHIOT_STR-INTRFLG sy-vline 
WA_RCGRHIOT_STR-MANDT sy-vline 
WA_RCGRHIOT_STR-RECN sy-vline 
WA_RCGRHIOT_STR-ACTN sy-vline 
WA_RCGRHIOT_STR-VALFR sy-vline 
WA_RCGRHIOT_STR-VALTO sy-vline 
WA_RCGRHIOT_STR-AENNR sy-vline 
WA_RCGRHIOT_STR-DELFLG sy-vline 
WA_RCGRHIOT_STR-PARKFLG sy-vline 
WA_RCGRHIOT_STR-CRDAT sy-vline 
WA_RCGRHIOT_STR-CRNAM sy-vline 
WA_RCGRHIOT_STR-UPDDAT sy-vline 
WA_RCGRHIOT_STR-UPDNAM sy-vline 
WA_RCGRHIOT_STR-SRSID sy-vline 
WA_RCGRHIOT_STR-OWNID sy-vline 
WA_RCGRHIOT_STR-RECNROOT sy-vline 
WA_RCGRHIOT_STR-UPDDATS sy-vline 
WA_RCGRHIOT_STR-UPDNAMS sy-vline 
WA_RCGRHIOT_STR-SUBID sy-vline 
WA_RCGRHIOT_STR-SUBCAT sy-vline 
WA_RCGRHIOT_STR-AUTHGRP sy-vline 
WA_RCGRHIOT_STR-REM sy-vline 
WA_RCGRHIOT_STR-SUBCHAR sy-vline 
WA_RCGRHIOT_STR-SUBNAM sy-vline 
WA_RCGRHIOT_STR-SUBCHARNAM sy-vline 
WA_RCGRHIOT_STR-AUTHNAM sy-vline 
WA_RCGRHIOT_STR-ADD_INF1 sy-vline 
WA_RCGRHIOT_STR-ADD_INF2 sy-vline 
WA_RCGRHIOT_STR-ADD_INF3 sy-vline 
WA_RCGRHIOT_STR-ADD_INF4 sy-vline 
WA_RCGRHIOT_STR-ADD_INF5 sy-vline 
WA_RCGRHIOT_STR-ADD_INF6 sy-vline 
WA_RCGRHIOT_STR-ADD_INF7 sy-vline 
WA_RCGRHIOT_STR-ADD_INF8 sy-vline 
WA_RCGRHIOT_STR-ADD_INF9 sy-vline 
WA_RCGRHIOT_STR-ADD_INF10 sy-vline 
WA_RCGRHIOT_STR-ADD_INF11 sy-vline 
WA_RCGRHIOT_STR-ADD_INF12 sy-vline 
WA_RCGRHIOT_STR-ADD_INF13 sy-vline 
WA_RCGRHIOT_STR-ADD_INF14 sy-vline 
WA_RCGRHIOT_STR-ADD_INF15 sy-vline 
WA_RCGRHIOT_STR-ADD_INF16 sy-vline 
WA_RCGRHIOT_STR-ADD_INF17 sy-vline 
WA_RCGRHIOT_STR-ADD_INF18 sy-vline 
WA_RCGRHIOT_STR-ADD_INF19 sy-vline 
WA_RCGRHIOT_STR-REF_INDIC sy-vline 
WA_RCGRHIOT_STR-ERRICON sy-vline      INTO ld_text SEPARATED BY SPACE.

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