ABAP Select data from SAP table HRF4LIST into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP HRF4LIST 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 HRF4LIST. 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 HRF4LIST 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_HRF4LIST TYPE STANDARD TABLE OF HRF4LIST,
      WA_HRF4LIST TYPE HRF4LIST,
      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: <HRF4LIST> TYPE HRF4LIST.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_HRF4LIST.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM HRF4LIST
  INTO TABLE IT_HRF4LIST.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM HRF4LIST
*  INTO TABLE @DATA(IT_HRF4LIST2).
*--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_HRF4LIST INDEX 1 INTO DATA(WA_HRF4LIST2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_HRF4LIST ASSIGNING <HRF4LIST>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<HRF4LIST>-PLVAR = 1.
<HRF4LIST>-OTYPE = 1.
<HRF4LIST>-OBJID = 1.
<HRF4LIST>-BEGDA = 1.
<HRF4LIST>-ENDDA = 1.

ENDLOOP.

LOOP AT IT_HRF4LIST INTO WA_HRF4LIST.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_HRF4LIST-ISTAT, sy-vline,
  WA_HRF4LIST-HISTO, sy-vline,
  WA_HRF4LIST-SHORT, sy-vline,
  WA_HRF4LIST-STEXT, sy-vline,
  WA_HRF4LIST-REALO, sy-vline,
  WA_HRF4LIST-ORG_OBJID, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_HRF4LIST 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_HRF4LIST 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_HRF4LIST INTO WA_HRF4LIST.


*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_HRF4LIST_STR, 
PLVAR TYPE STRING,
OTYPE TYPE STRING,
OBJID TYPE STRING,
BEGDA TYPE STRING,
ENDDA TYPE STRING,
ISTAT TYPE STRING,
HISTO TYPE STRING,
SHORT TYPE STRING,
STEXT TYPE STRING,
REALO TYPE STRING,
ORG_OBJID TYPE STRING,
ORG_SHORT TYPE STRING,
ORG_STEXT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_HRF4LIST_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_HRF4LIST_STR-PLVAR sy-vline 
WA_HRF4LIST_STR-OTYPE sy-vline 
WA_HRF4LIST_STR-OBJID sy-vline 
WA_HRF4LIST_STR-BEGDA sy-vline 
WA_HRF4LIST_STR-ENDDA sy-vline 
WA_HRF4LIST_STR-ISTAT sy-vline 
WA_HRF4LIST_STR-HISTO sy-vline 
WA_HRF4LIST_STR-SHORT sy-vline 
WA_HRF4LIST_STR-STEXT sy-vline 
WA_HRF4LIST_STR-REALO sy-vline 
WA_HRF4LIST_STR-ORG_OBJID sy-vline 
WA_HRF4LIST_STR-ORG_SHORT sy-vline 
WA_HRF4LIST_STR-ORG_STEXT sy-vline      INTO ld_text SEPARATED BY SPACE.

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