ABAP Select data from SAP table RC74 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RC74 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 RC74. 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 RC74 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_RC74 TYPE STANDARD TABLE OF RC74,
      WA_RC74 TYPE RC74,
      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: <RC74> TYPE RC74.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RC74.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RC74
  INTO TABLE IT_RC74.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RC74
*  INTO TABLE @DATA(IT_RC742).
*--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_RC74 INDEX 1 INTO DATA(WA_RC742).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RC74 ASSIGNING <RC74>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RC74>-SIGN_OBJ = 1.
<RC74>-NUMB_CUR = 1.
<RC74>-NUMB_TOT = 1.
<RC74>-CRID = 1.
<RC74>-FTNO = 1.

ENDLOOP.

LOOP AT IT_RC74 INTO WA_RC74.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RC74-FVNO, sy-vline,
  WA_RC74-TAB_MELD, sy-vline,
  WA_RC74-TAB_ZEILE, sy-vline,
  WA_RC74-SIGN_COUNT, sy-vline,
  WA_RC74-ATWRT, sy-vline,
  WA_RC74-SIGNSTRAT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RC74 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_RC74 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_RC74 INTO WA_RC74.


*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 NUMCV, internal->external for field FTNR
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_RC74-FTNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RC74-FTNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit NUMCV, internal->external for field FVNR
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_RC74-FVNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RC74-FVNR.
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_RC74_STR, 
SIGN_OBJ TYPE STRING,
NUMB_CUR TYPE STRING,
NUMB_TOT TYPE STRING,
CRID TYPE STRING,
FTNO TYPE STRING,
FVNO TYPE STRING,
TAB_MELD TYPE STRING,
TAB_ZEILE TYPE STRING,
SIGN_COUNT TYPE STRING,
ATWRT TYPE STRING,
SIGNSTRAT TYPE STRING,
COUNT_STEP TYPE STRING,
SIGNSTEP TYPE STRING,
SIGNAUTH TYPE STRING,
FLG_EOSP TYPE STRING,
FTNR TYPE STRING,
FVNR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RC74_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_RC74_STR-SIGN_OBJ sy-vline 
WA_RC74_STR-NUMB_CUR sy-vline 
WA_RC74_STR-NUMB_TOT sy-vline 
WA_RC74_STR-CRID sy-vline 
WA_RC74_STR-FTNO sy-vline 
WA_RC74_STR-FVNO sy-vline 
WA_RC74_STR-TAB_MELD sy-vline 
WA_RC74_STR-TAB_ZEILE sy-vline 
WA_RC74_STR-SIGN_COUNT sy-vline 
WA_RC74_STR-ATWRT sy-vline 
WA_RC74_STR-SIGNSTRAT sy-vline 
WA_RC74_STR-COUNT_STEP sy-vline 
WA_RC74_STR-SIGNSTEP sy-vline 
WA_RC74_STR-SIGNAUTH sy-vline 
WA_RC74_STR-FLG_EOSP sy-vline 
WA_RC74_STR-FTNR sy-vline 
WA_RC74_STR-FVNR sy-vline      INTO ld_text SEPARATED BY SPACE.

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