ABAP Select data from SAP table ETRFD into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ETRFD
*  INTO TABLE @DATA(IT_ETRFD2).
*--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_ETRFD INDEX 1 INTO DATA(WA_ETRFD2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ETRFD>-MANDT = 1.
<ETRFD>-LRATESTEP = 1.
<ETRFD>-SPARTE = 1.
<ETRFD>-AKLASSE = 1.
<ETRFD>-OPERAND = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ETRFD-USE_REGIST, sy-vline,
  WA_ETRFD-USE_RTP, sy-vline,
  WA_ETRFD-USE_DEVICE, sy-vline,
  WA_ETRFD-USE_FACTS, sy-vline,
  WA_ETRFD-USE_PEB, sy-vline,
  WA_ETRFD-USE_WASTE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ETRFD 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_ETRFD 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_ETRFD INTO WA_ETRFD.


*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 LUNIT, internal->external for field MASSBILLC6
CALL FUNCTION 'CONVERSION_EXIT_LUNIT_OUTPUT'
  EXPORTING
    input =                      WA_ETRFD-MASSBILLC6
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ETRFD-MASSBILLC6.
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_ETRFD_STR, 
MANDT TYPE STRING,
LRATESTEP TYPE STRING,
SPARTE TYPE STRING,
AKLASSE TYPE STRING,
OPERAND TYPE STRING,
USE_REGIST TYPE STRING,
USE_RTP TYPE STRING,
USE_DEVICE TYPE STRING,
USE_FACTS TYPE STRING,
USE_PEB TYPE STRING,
USE_WASTE TYPE STRING,
MINPROZ TYPE STRING,
V_TARIFNR TYPE STRING,
OPERANDBEZ TYPE STRING,
TARIFBEZ TYPE STRING,
SPARTENBEZ TYPE STRING,
AKLASSBEZ TYPE STRING,
KONZIGRBEZ TYPE STRING,
MASSBILLC6 TYPE STRING,
GEWSCHLBEZ TYPE STRING,
MARK TYPE STRING,
PRUEFKL TYPE STRING,
PRUEFKLBEZ TYPE STRING,
RTPINTERFACE TYPE STRING,
RTPINTERFACETEXT TYPE STRING,
RTPCATEGORY TYPE STRING,
RTPCATEGORYTEXT TYPE STRING,
TARIFNR TYPE STRING,
TARLFDNR TYPE STRING,
OPTIONAL TYPE STRING,
TIMECONTRL TYPE STRING,
STTARIF TYPE STRING,
S_TVORG TYPE STRING,
H_TVORG TYPE STRING,
S_ABSTVORG TYPE STRING,
H_ABSTVORG TYPE STRING,
CHNG_SIGN TYPE STRING,
KONZIGR TYPE STRING,
SAISON TYPE STRING,
PROGRAMM TYPE STRING,
EIN01 TYPE STRING,
EIN02 TYPE STRING,
EIN03 TYPE STRING,
EIN04 TYPE STRING,
EIN05 TYPE STRING,
EIN06 TYPE STRING,
EIN07 TYPE STRING,
EIN08 TYPE STRING,
EIN09 TYPE STRING,
EIN10 TYPE STRING,
AUS01 TYPE STRING,
AUS02 TYPE STRING,
AUS03 TYPE STRING,
AUS04 TYPE STRING,
AUS05 TYPE STRING,
VARCONT1 TYPE STRING,
VARCONT2 TYPE STRING,
VARCONT3 TYPE STRING,
VARCONT4 TYPE STRING,
VARCONT5 TYPE STRING,
BELZART1 TYPE STRING,
BELZART2 TYPE STRING,
BELZART3 TYPE STRING,
BELZART4 TYPE STRING,
BELZART5 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ETRFD_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_ETRFD_STR-MANDT sy-vline 
WA_ETRFD_STR-LRATESTEP sy-vline 
WA_ETRFD_STR-SPARTE sy-vline 
WA_ETRFD_STR-AKLASSE sy-vline 
WA_ETRFD_STR-OPERAND sy-vline 
WA_ETRFD_STR-USE_REGIST sy-vline 
WA_ETRFD_STR-USE_RTP sy-vline 
WA_ETRFD_STR-USE_DEVICE sy-vline 
WA_ETRFD_STR-USE_FACTS sy-vline 
WA_ETRFD_STR-USE_PEB sy-vline 
WA_ETRFD_STR-USE_WASTE sy-vline 
WA_ETRFD_STR-MINPROZ sy-vline 
WA_ETRFD_STR-V_TARIFNR sy-vline 
WA_ETRFD_STR-OPERANDBEZ sy-vline 
WA_ETRFD_STR-TARIFBEZ sy-vline 
WA_ETRFD_STR-SPARTENBEZ sy-vline 
WA_ETRFD_STR-AKLASSBEZ sy-vline 
WA_ETRFD_STR-KONZIGRBEZ sy-vline 
WA_ETRFD_STR-MASSBILLC6 sy-vline 
WA_ETRFD_STR-GEWSCHLBEZ sy-vline 
WA_ETRFD_STR-MARK sy-vline 
WA_ETRFD_STR-PRUEFKL sy-vline 
WA_ETRFD_STR-PRUEFKLBEZ sy-vline 
WA_ETRFD_STR-RTPINTERFACE sy-vline 
WA_ETRFD_STR-RTPINTERFACETEXT sy-vline 
WA_ETRFD_STR-RTPCATEGORY sy-vline 
WA_ETRFD_STR-RTPCATEGORYTEXT sy-vline 
WA_ETRFD_STR-TARIFNR sy-vline 
WA_ETRFD_STR-TARLFDNR sy-vline 
WA_ETRFD_STR-OPTIONAL sy-vline 
WA_ETRFD_STR-TIMECONTRL sy-vline 
WA_ETRFD_STR-STTARIF sy-vline 
WA_ETRFD_STR-S_TVORG sy-vline 
WA_ETRFD_STR-H_TVORG sy-vline 
WA_ETRFD_STR-S_ABSTVORG sy-vline 
WA_ETRFD_STR-H_ABSTVORG sy-vline 
WA_ETRFD_STR-CHNG_SIGN sy-vline 
WA_ETRFD_STR-KONZIGR sy-vline 
WA_ETRFD_STR-SAISON sy-vline 
WA_ETRFD_STR-PROGRAMM sy-vline 
WA_ETRFD_STR-EIN01 sy-vline 
WA_ETRFD_STR-EIN02 sy-vline 
WA_ETRFD_STR-EIN03 sy-vline 
WA_ETRFD_STR-EIN04 sy-vline 
WA_ETRFD_STR-EIN05 sy-vline 
WA_ETRFD_STR-EIN06 sy-vline 
WA_ETRFD_STR-EIN07 sy-vline 
WA_ETRFD_STR-EIN08 sy-vline 
WA_ETRFD_STR-EIN09 sy-vline 
WA_ETRFD_STR-EIN10 sy-vline 
WA_ETRFD_STR-AUS01 sy-vline 
WA_ETRFD_STR-AUS02 sy-vline 
WA_ETRFD_STR-AUS03 sy-vline 
WA_ETRFD_STR-AUS04 sy-vline 
WA_ETRFD_STR-AUS05 sy-vline 
WA_ETRFD_STR-VARCONT1 sy-vline 
WA_ETRFD_STR-VARCONT2 sy-vline 
WA_ETRFD_STR-VARCONT3 sy-vline 
WA_ETRFD_STR-VARCONT4 sy-vline 
WA_ETRFD_STR-VARCONT5 sy-vline 
WA_ETRFD_STR-BELZART1 sy-vline 
WA_ETRFD_STR-BELZART2 sy-vline 
WA_ETRFD_STR-BELZART3 sy-vline 
WA_ETRFD_STR-BELZART4 sy-vline 
WA_ETRFD_STR-BELZART5 sy-vline      INTO ld_text SEPARATED BY SPACE.

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