ABAP Select data from SAP table OTF_FC into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM OTF_FC
*  INTO TABLE @DATA(IT_OTF_FC2).
*--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_OTF_FC INDEX 1 INTO DATA(WA_OTF_FC2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<OTF_FC>-FAMILY = 1.
<OTF_FC>-SIZE = 1.
<OTF_FC>-BOLD = 1.
<OTF_FC>-ITALIC = 1.
<OTF_FC>-PITCH = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_OTF_FC-PROPORTION, sy-vline,
  WA_OTF_FC-PC1, sy-vline,
  WA_OTF_FC-PC2, sy-vline,
  WA_OTF_FC-CODEPAGE, sy-vline,
  WA_OTF_FC-SPACEWIDTH, sy-vline,
  WA_OTF_FC-LANGU, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_OTF_FC 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_OTF_FC 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_OTF_FC INTO WA_OTF_FC.


*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_OTF_FC_STR, 
FAMILY TYPE STRING,
SIZE TYPE STRING,
BOLD TYPE STRING,
ITALIC TYPE STRING,
PITCH TYPE STRING,
PROPORTION TYPE STRING,
PC1 TYPE STRING,
PC2 TYPE STRING,
CODEPAGE TYPE STRING,
SPACEWIDTH TYPE STRING,
LANGU TYPE STRING,
POSTSCRIPT TYPE STRING,
SCALEFONT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_OTF_FC_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_OTF_FC_STR-FAMILY sy-vline 
WA_OTF_FC_STR-SIZE sy-vline 
WA_OTF_FC_STR-BOLD sy-vline 
WA_OTF_FC_STR-ITALIC sy-vline 
WA_OTF_FC_STR-PITCH sy-vline 
WA_OTF_FC_STR-PROPORTION sy-vline 
WA_OTF_FC_STR-PC1 sy-vline 
WA_OTF_FC_STR-PC2 sy-vline 
WA_OTF_FC_STR-CODEPAGE sy-vline 
WA_OTF_FC_STR-SPACEWIDTH sy-vline 
WA_OTF_FC_STR-LANGU sy-vline 
WA_OTF_FC_STR-POSTSCRIPT sy-vline 
WA_OTF_FC_STR-SCALEFONT sy-vline      INTO ld_text SEPARATED BY SPACE.

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