ABAP Select data from SAP table E1HR_ITSN into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP E1HR_ITSN 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 E1HR_ITSN. 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 E1HR_ITSN 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_E1HR_ITSN TYPE STANDARD TABLE OF E1HR_ITSN,
      WA_E1HR_ITSN TYPE E1HR_ITSN,
      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: <E1HR_ITSN> TYPE E1HR_ITSN.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_E1HR_ITSN.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM E1HR_ITSN
  INTO TABLE IT_E1HR_ITSN.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM E1HR_ITSN
*  INTO TABLE @DATA(IT_E1HR_ITSN2).
*--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_E1HR_ITSN INDEX 1 INTO DATA(WA_E1HR_ITSN2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_E1HR_ITSN ASSIGNING <E1HR_ITSN>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<E1HR_ITSN>-BEGDA = 1.
<E1HR_ITSN>-ENDDA = 1.
<E1HR_ITSN>-COSCA = 1.
<E1HR_ITSN>-DASCA = 1.
<E1HR_ITSN>-NUSCA = 1.

ENDLOOP.

LOOP AT IT_E1HR_ITSN INTO WA_E1HR_ITSN.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_E1HR_ITSN-PRSCA, sy-vline,
  WA_E1HR_ITSN-NUSCB, sy-vline,
  WA_E1HR_ITSN-PRSCB, sy-vline,
  WA_E1HR_ITSN-NUSCC, sy-vline,
  WA_E1HR_ITSN-PERPT, sy-vline,
  WA_E1HR_ITSN-CDCLA, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_E1HR_ITSN 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_E1HR_ITSN 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_E1HR_ITSN INTO WA_E1HR_ITSN.


*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_E1HR_ITSN_STR, 
BEGDA TYPE STRING,
ENDDA TYPE STRING,
COSCA TYPE STRING,
DASCA TYPE STRING,
NUSCA TYPE STRING,
PRSCA TYPE STRING,
NUSCB TYPE STRING,
PRSCB TYPE STRING,
NUSCC TYPE STRING,
PERPT TYPE STRING,
CDCLA TYPE STRING,
COSC1 TYPE STRING,
DASC1 TYPE STRING,
CDCL1 TYPE STRING,
NUSC1 TYPE STRING,
COSC2 TYPE STRING,
DASC2 TYPE STRING,
CDCL2 TYPE STRING,
NUSC2 TYPE STRING,
COSC3 TYPE STRING,
DASC3 TYPE STRING,
CDCL3 TYPE STRING,
NUSC3 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_E1HR_ITSN_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_E1HR_ITSN_STR-BEGDA sy-vline 
WA_E1HR_ITSN_STR-ENDDA sy-vline 
WA_E1HR_ITSN_STR-COSCA sy-vline 
WA_E1HR_ITSN_STR-DASCA sy-vline 
WA_E1HR_ITSN_STR-NUSCA sy-vline 
WA_E1HR_ITSN_STR-PRSCA sy-vline 
WA_E1HR_ITSN_STR-NUSCB sy-vline 
WA_E1HR_ITSN_STR-PRSCB sy-vline 
WA_E1HR_ITSN_STR-NUSCC sy-vline 
WA_E1HR_ITSN_STR-PERPT sy-vline 
WA_E1HR_ITSN_STR-CDCLA sy-vline 
WA_E1HR_ITSN_STR-COSC1 sy-vline 
WA_E1HR_ITSN_STR-DASC1 sy-vline 
WA_E1HR_ITSN_STR-CDCL1 sy-vline 
WA_E1HR_ITSN_STR-NUSC1 sy-vline 
WA_E1HR_ITSN_STR-COSC2 sy-vline 
WA_E1HR_ITSN_STR-DASC2 sy-vline 
WA_E1HR_ITSN_STR-CDCL2 sy-vline 
WA_E1HR_ITSN_STR-NUSC2 sy-vline 
WA_E1HR_ITSN_STR-COSC3 sy-vline 
WA_E1HR_ITSN_STR-DASC3 sy-vline 
WA_E1HR_ITSN_STR-CDCL3 sy-vline 
WA_E1HR_ITSN_STR-NUSC3 sy-vline      INTO ld_text SEPARATED BY SPACE.

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