ABAP Select data from SAP table RFVIMAFCST into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RFVIMAFCST
*  INTO TABLE @DATA(IT_RFVIMAFCST2).
*--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_RFVIMAFCST INDEX 1 INTO DATA(WA_RFVIMAFCST2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RFVIMAFCST>-XIDENT = 1.
<RFVIMAFCST>-DADJFROM = 1.
<RFVIMAFCST>-DADJTILL = 1.
<RFVIMAFCST>-XADJFROM = 1.
<RFVIMAFCST>-NADJCOUNT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RFVIMAFCST-JFROMDATE, sy-vline,
  WA_RFVIMAFCST-JFROMEARL, sy-vline,
  WA_RFVIMAFCST-JTILLDATE, sy-vline,
  WA_RFVIMAFCST-JTILLNUMB, sy-vline,
  WA_RFVIMAFCST-DSHOWFROM, sy-vline,
  WA_RFVIMAFCST-DSHOWTILL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RFVIMAFCST 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_RFVIMAFCST 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_RFVIMAFCST INTO WA_RFVIMAFCST.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_RFVIMAFCST_STR, 
XIDENT TYPE STRING,
DADJFROM TYPE STRING,
DADJTILL TYPE STRING,
XADJFROM TYPE STRING,
NADJCOUNT TYPE STRING,
JFROMDATE TYPE STRING,
JFROMEARL TYPE STRING,
JTILLDATE TYPE STRING,
JTILLNUMB TYPE STRING,
DSHOWFROM TYPE STRING,
DSHOWTILL TYPE STRING,
DFAELL TYPE STRING,
JALLOWBACK TYPE STRING,
JDRCTSAVE TYPE STRING,
SSTDORT TYPE STRING,
SMIETR TYPE STRING,
SANPSTAF TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RFVIMAFCST_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_RFVIMAFCST_STR-XIDENT sy-vline 
WA_RFVIMAFCST_STR-DADJFROM sy-vline 
WA_RFVIMAFCST_STR-DADJTILL sy-vline 
WA_RFVIMAFCST_STR-XADJFROM sy-vline 
WA_RFVIMAFCST_STR-NADJCOUNT sy-vline 
WA_RFVIMAFCST_STR-JFROMDATE sy-vline 
WA_RFVIMAFCST_STR-JFROMEARL sy-vline 
WA_RFVIMAFCST_STR-JTILLDATE sy-vline 
WA_RFVIMAFCST_STR-JTILLNUMB sy-vline 
WA_RFVIMAFCST_STR-DSHOWFROM sy-vline 
WA_RFVIMAFCST_STR-DSHOWTILL sy-vline 
WA_RFVIMAFCST_STR-DFAELL sy-vline 
WA_RFVIMAFCST_STR-JALLOWBACK sy-vline 
WA_RFVIMAFCST_STR-JDRCTSAVE sy-vline 
WA_RFVIMAFCST_STR-SSTDORT sy-vline 
WA_RFVIMAFCST_STR-SMIETR sy-vline 
WA_RFVIMAFCST_STR-SANPSTAF sy-vline      INTO ld_text SEPARATED BY SPACE.

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