ABAP Select data from SAP table RC270 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RC270 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 RC270. 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 RC270 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_RC270 TYPE STANDARD TABLE OF RC270,
      WA_RC270 TYPE RC270,
      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: <RC270> TYPE RC270.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RC270.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RC270
  INTO TABLE IT_RC270.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RC270
*  INTO TABLE @DATA(IT_RC2702).
*--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_RC270 INDEX 1 INTO DATA(WA_RC2702).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RC270 ASSIGNING <RC270>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RC270>-STICHTAG = 1.
<RC270>-TXTKZ = 1.
<RC270>-SORTL = 1.
<RC270>-LIFNR = 1.
<RC270>-PLIFZ = 1.

ENDLOOP.

LOOP AT IT_RC270 INTO WA_RC270.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RC270-PREIS, sy-vline,
  WA_RC270-PEINH, sy-vline,
  WA_RC270-WAERS, sy-vline,
  WA_RC270-HEAD1, sy-vline,
  WA_RC270-HEAD2, sy-vline,
  WA_RC270-VGWT1, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RC270 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_RC270 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_RC270 INTO WA_RC270.


*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 LIFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RC270-LIFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RC270-LIFNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field OPR_UNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_RC270-OPR_UNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RC270-OPR_UNIT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field OVL_UNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_RC270-OVL_UNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RC270-OVL_UNIT.
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_RC270_STR, 
STICHTAG TYPE STRING,
TXTKZ TYPE STRING,
SORTL TYPE STRING,
LIFNR TYPE STRING,
PLIFZ TYPE STRING,
PREIS TYPE STRING,
PEINH TYPE STRING,
WAERS TYPE STRING,
HEAD1 TYPE STRING,
HEAD2 TYPE STRING,
VGWT1 TYPE STRING,
VGWT2 TYPE STRING,
VGWT3 TYPE STRING,
VGWT4 TYPE STRING,
VGWT05 TYPE STRING,
VGWT06 TYPE STRING,
FLG_BEZFLG TYPE STRING,
REF_KZ TYPE STRING,
HEAD_MSEHT TYPE STRING,
OPR_MSEHT TYPE STRING,
OPR_UNIT TYPE STRING,
OVL_UNIT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RC270_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_RC270_STR-STICHTAG sy-vline 
WA_RC270_STR-TXTKZ sy-vline 
WA_RC270_STR-SORTL sy-vline 
WA_RC270_STR-LIFNR sy-vline 
WA_RC270_STR-PLIFZ sy-vline 
WA_RC270_STR-PREIS sy-vline 
WA_RC270_STR-PEINH sy-vline 
WA_RC270_STR-WAERS sy-vline 
WA_RC270_STR-HEAD1 sy-vline 
WA_RC270_STR-HEAD2 sy-vline 
WA_RC270_STR-VGWT1 sy-vline 
WA_RC270_STR-VGWT2 sy-vline 
WA_RC270_STR-VGWT3 sy-vline 
WA_RC270_STR-VGWT4 sy-vline 
WA_RC270_STR-VGWT05 sy-vline 
WA_RC270_STR-VGWT06 sy-vline 
WA_RC270_STR-FLG_BEZFLG sy-vline 
WA_RC270_STR-REF_KZ sy-vline 
WA_RC270_STR-HEAD_MSEHT sy-vline 
WA_RC270_STR-OPR_MSEHT sy-vline 
WA_RC270_STR-OPR_UNIT sy-vline 
WA_RC270_STR-OVL_UNIT sy-vline      INTO ld_text SEPARATED BY SPACE.

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