ABAP Select data from SAP table RCGMCHANGEIOT 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 RCGMCHANGEIOT 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 RCGMCHANGEIOT. 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 RCGMCHANGEIOT 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_RCGMCHANGEIOT TYPE STANDARD TABLE OF RCGMCHANGEIOT,
      WA_RCGMCHANGEIOT TYPE RCGMCHANGEIOT,
      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: <RCGMCHANGEIOT> TYPE RCGMCHANGEIOT.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RCGMCHANGEIOT
*  INTO TABLE @DATA(IT_RCGMCHANGEIOT2).
*--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_RCGMCHANGEIOT INDEX 1 INTO DATA(WA_RCGMCHANGEIOT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RCGMCHANGEIOT>-MANDT = 1.
<RCGMCHANGEIOT>-RECN = 1.
<RCGMCHANGEIOT>-ACTN = 1.
<RCGMCHANGEIOT>-MARKFLG = 1.
<RCGMCHANGEIOT>-SELEFLG = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RCGMCHANGEIOT-LINENO, sy-vline,
  WA_RCGMCHANGEIOT-LINEMOD, sy-vline,
  WA_RCGMCHANGEIOT-CHCOFLG, sy-vline,
  WA_RCGMCHANGEIOT-LOCKMOD, sy-vline,
  WA_RCGMCHANGEIOT-INTRFLG, sy-vline,
  WA_RCGMCHANGEIOT-VALFR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RCGMCHANGEIOT 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_RCGMCHANGEIOT 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_RCGMCHANGEIOT INTO WA_RCGMCHANGEIOT.


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

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

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

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

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

*Conversion exit ATINN, internal->external for field ATINN
CALL FUNCTION 'CONVERSION_EXIT_ATINN_OUTPUT'
  EXPORTING
    input =                      WA_RCGMCHANGEIOT-ATINN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RCGMCHANGEIOT-ATINN.
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_RCGMCHANGEIOT_STR, 
MANDT TYPE STRING,
RECN TYPE STRING,
ACTN TYPE STRING,
MARKFLG TYPE STRING,
SELEFLG TYPE STRING,
LINENO TYPE STRING,
LINEMOD TYPE STRING,
CHCOFLG TYPE STRING,
LOCKMOD TYPE STRING,
INTRFLG 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,
ESTCAT TYPE STRING,
ATINN TYPE STRING,
SLWRT TYPE STRING,
OPERATOR TYPE STRING,
CARACNAME TYPE STRING,
TYPE TYPE STRING,
MSEHL TYPE STRING,
ATNAM TYPE STRING,
ATWTB TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RCGMCHANGEIOT_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_RCGMCHANGEIOT_STR-MANDT sy-vline 
WA_RCGMCHANGEIOT_STR-RECN sy-vline 
WA_RCGMCHANGEIOT_STR-ACTN sy-vline 
WA_RCGMCHANGEIOT_STR-MARKFLG sy-vline 
WA_RCGMCHANGEIOT_STR-SELEFLG sy-vline 
WA_RCGMCHANGEIOT_STR-LINENO sy-vline 
WA_RCGMCHANGEIOT_STR-LINEMOD sy-vline 
WA_RCGMCHANGEIOT_STR-CHCOFLG sy-vline 
WA_RCGMCHANGEIOT_STR-LOCKMOD sy-vline 
WA_RCGMCHANGEIOT_STR-INTRFLG sy-vline 
WA_RCGMCHANGEIOT_STR-VALFR sy-vline 
WA_RCGMCHANGEIOT_STR-VALTO sy-vline 
WA_RCGMCHANGEIOT_STR-AENNR sy-vline 
WA_RCGMCHANGEIOT_STR-DELFLG sy-vline 
WA_RCGMCHANGEIOT_STR-PARKFLG sy-vline 
WA_RCGMCHANGEIOT_STR-CRDAT sy-vline 
WA_RCGMCHANGEIOT_STR-CRNAM sy-vline 
WA_RCGMCHANGEIOT_STR-UPDDAT sy-vline 
WA_RCGMCHANGEIOT_STR-UPDNAM sy-vline 
WA_RCGMCHANGEIOT_STR-SRSID sy-vline 
WA_RCGMCHANGEIOT_STR-OWNID sy-vline 
WA_RCGMCHANGEIOT_STR-RECNROOT sy-vline 
WA_RCGMCHANGEIOT_STR-ESTCAT sy-vline 
WA_RCGMCHANGEIOT_STR-ATINN sy-vline 
WA_RCGMCHANGEIOT_STR-SLWRT sy-vline 
WA_RCGMCHANGEIOT_STR-OPERATOR sy-vline 
WA_RCGMCHANGEIOT_STR-CARACNAME sy-vline 
WA_RCGMCHANGEIOT_STR-TYPE sy-vline 
WA_RCGMCHANGEIOT_STR-MSEHL sy-vline 
WA_RCGMCHANGEIOT_STR-ATNAM sy-vline 
WA_RCGMCHANGEIOT_STR-ATWTB sy-vline      INTO ld_text SEPARATED BY SPACE.

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