ABAP Select data from SAP table RFLOW_IF into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RFLOW_IF
*  INTO TABLE @DATA(IT_RFLOW_IF2).
*--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_RFLOW_IF INDEX 1 INTO DATA(WA_RFLOW_IF2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RFLOW_IF>-SBEWART = 1.
<RFLOW_IF>-SGTXT = 1.
<RFLOW_IF>-BCWHR = 1.
<RFLOW_IF>-SCWHR = 1.
<RFLOW_IF>-KURS2 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RFLOW_IF-DFAELL, sy-vline,
  WA_RFLOW_IF-DVALUT, sy-vline,
  WA_RFLOW_IF-DDISPO, sy-vline,
  WA_RFLOW_IF-RPARTNR, sy-vline,
  WA_RFLOW_IF-BVTYP, sy-vline,
  WA_RFLOW_IF-ZLSCH, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RFLOW_IF 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_RFLOW_IF 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_RFLOW_IF INTO WA_RFLOW_IF.


*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 EXCRT, internal->external for field KURS2
CALL FUNCTION 'CONVERSION_EXIT_EXCRT_OUTPUT'
  EXPORTING
    input =                      WA_RFLOW_IF-KURS2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFLOW_IF-KURS2.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field RPARTNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RFLOW_IF-RPARTNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFLOW_IF-RPARTNR.
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_RFLOW_IF_STR, 
SBEWART TYPE STRING,
SGTXT TYPE STRING,
BCWHR TYPE STRING,
SCWHR TYPE STRING,
KURS2 TYPE STRING,
DFAELL TYPE STRING,
DVALUT TYPE STRING,
DDISPO TYPE STRING,
RPARTNR TYPE STRING,
BVTYP TYPE STRING,
ZLSCH TYPE STRING,
SZEGEN TYPE STRING,
ZAHLS TYPE STRING,
ZUONR TYPE STRING,
SZBMETH TYPE STRING,
DBERVON TYPE STRING,
SEXCLVON TYPE STRING,
SULTVON TYPE STRING,
DBERBIS TYPE STRING,
SINCLBIS TYPE STRING,
SULTBIS TYPE STRING,
ATAGE TYPE STRING,
SINCL TYPE STRING,
SVULT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RFLOW_IF_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_RFLOW_IF_STR-SBEWART sy-vline 
WA_RFLOW_IF_STR-SGTXT sy-vline 
WA_RFLOW_IF_STR-BCWHR sy-vline 
WA_RFLOW_IF_STR-SCWHR sy-vline 
WA_RFLOW_IF_STR-KURS2 sy-vline 
WA_RFLOW_IF_STR-DFAELL sy-vline 
WA_RFLOW_IF_STR-DVALUT sy-vline 
WA_RFLOW_IF_STR-DDISPO sy-vline 
WA_RFLOW_IF_STR-RPARTNR sy-vline 
WA_RFLOW_IF_STR-BVTYP sy-vline 
WA_RFLOW_IF_STR-ZLSCH sy-vline 
WA_RFLOW_IF_STR-SZEGEN sy-vline 
WA_RFLOW_IF_STR-ZAHLS sy-vline 
WA_RFLOW_IF_STR-ZUONR sy-vline 
WA_RFLOW_IF_STR-SZBMETH sy-vline 
WA_RFLOW_IF_STR-DBERVON sy-vline 
WA_RFLOW_IF_STR-SEXCLVON sy-vline 
WA_RFLOW_IF_STR-SULTVON sy-vline 
WA_RFLOW_IF_STR-DBERBIS sy-vline 
WA_RFLOW_IF_STR-SINCLBIS sy-vline 
WA_RFLOW_IF_STR-SULTBIS sy-vline 
WA_RFLOW_IF_STR-ATAGE sy-vline 
WA_RFLOW_IF_STR-SINCL sy-vline 
WA_RFLOW_IF_STR-SVULT sy-vline      INTO ld_text SEPARATED BY SPACE.

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