ABAP Select data from SAP table SFRELN into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM SFRELN
*  INTO TABLE @DATA(IT_SFRELN2).
*--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_SFRELN INDEX 1 INTO DATA(WA_SFRELN2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<SFRELN>-TXTKEY = 1.
<SFRELN>-REL = 1.
<SFRELN>-ADM = 1.
<SFRELN>-CON = 1.
<SFRELN>-DEP = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_SFRELN-FUN, sy-vline,
  WA_SFRELN-INS, sy-vline,
  WA_SFRELN-PAR, sy-vline,
  WA_SFRELN-STA, sy-vline,
  WA_SFRELN-BIN, sy-vline,
  WA_SFRELN-CUA, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_SFRELN 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_SFRELN 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_SFRELN INTO WA_SFRELN.


*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_SFRELN_STR, 
TXTKEY TYPE STRING,
REL TYPE STRING,
ADM TYPE STRING,
CON TYPE STRING,
DEP TYPE STRING,
FUN TYPE STRING,
INS TYPE STRING,
PAR TYPE STRING,
STA TYPE STRING,
BIN TYPE STRING,
CUA TYPE STRING,
NAC TYPE STRING,
ACT TYPE STRING,
LAW TYPE STRING,
ADDONID TYPE STRING,
COUNTRY TYPE STRING,
ADDONRL TYPE STRING,
NOT_APPROV TYPE STRING,
COMPONENT TYPE STRING,
EXTRELEASE TYPE STRING,
SUP_PACKAGE TYPE STRING,
BUS_FUNCTION TYPE STRING,END OF T_EKKO_STR.
DATA: WA_SFRELN_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_SFRELN_STR-TXTKEY sy-vline 
WA_SFRELN_STR-REL sy-vline 
WA_SFRELN_STR-ADM sy-vline 
WA_SFRELN_STR-CON sy-vline 
WA_SFRELN_STR-DEP sy-vline 
WA_SFRELN_STR-FUN sy-vline 
WA_SFRELN_STR-INS sy-vline 
WA_SFRELN_STR-PAR sy-vline 
WA_SFRELN_STR-STA sy-vline 
WA_SFRELN_STR-BIN sy-vline 
WA_SFRELN_STR-CUA sy-vline 
WA_SFRELN_STR-NAC sy-vline 
WA_SFRELN_STR-ACT sy-vline 
WA_SFRELN_STR-LAW sy-vline 
WA_SFRELN_STR-ADDONID sy-vline 
WA_SFRELN_STR-COUNTRY sy-vline 
WA_SFRELN_STR-ADDONRL sy-vline 
WA_SFRELN_STR-NOT_APPROV sy-vline 
WA_SFRELN_STR-COMPONENT sy-vline 
WA_SFRELN_STR-EXTRELEASE sy-vline 
WA_SFRELN_STR-SUP_PACKAGE sy-vline 
WA_SFRELN_STR-BUS_FUNCTION sy-vline      INTO ld_text SEPARATED BY SPACE.

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