ABAP Select data from SAP table E1HR_CN into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP E1HR_CN 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_CN. 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_CN 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_CN TYPE STANDARD TABLE OF E1HR_CN,
      WA_E1HR_CN TYPE E1HR_CN,
      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_CN> TYPE E1HR_CN.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_E1HR_CN.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM E1HR_CN
  INTO TABLE IT_E1HR_CN.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM E1HR_CN
*  INTO TABLE @DATA(IT_E1HR_CN2).
*--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_CN INDEX 1 INTO DATA(WA_E1HR_CN2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_E1HR_CN ASSIGNING <E1HR_CN>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<E1HR_CN>-BEGDA = 1.
<E1HR_CN>-ENDDA = 1.
<E1HR_CN>-CTTYP = 1.
<E1HR_CN>-CTNUM = 1.
<E1HR_CN>-CTBEG = 1.

ENDLOOP.

LOOP AT IT_E1HR_CN INTO WA_E1HR_CN.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_E1HR_CN-CTEDT, sy-vline,
  WA_E1HR_CN-WRKPL, sy-vline,
  WA_E1HR_CN-KONSL, sy-vline,
  WA_E1HR_CN-KONTX, sy-vline,
  WA_E1HR_CN-NBTGK, sy-vline,
  WA_E1HR_CN-WTTKL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_E1HR_CN 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_CN 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_CN INTO WA_E1HR_CN.


*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_CN_STR, 
BEGDA TYPE STRING,
ENDDA TYPE STRING,
CTTYP TYPE STRING,
CTNUM TYPE STRING,
CTBEG TYPE STRING,
CTEDT TYPE STRING,
WRKPL TYPE STRING,
KONSL TYPE STRING,
KONTX TYPE STRING,
NBTGK TYPE STRING,
WTTKL TYPE STRING,
LFZFR TYPE STRING,
LFZZH TYPE STRING,
KGZFR TYPE STRING,
KGZZH TYPE STRING,
PRBZT TYPE STRING,
PRBEH TYPE STRING,
KDGFR TYPE STRING,
KDGTX TYPE STRING,
KDGF2 TYPE STRING,
KDGTX2 TYPE STRING,
ARBER TYPE STRING,
EINDT TYPE STRING,
KONDT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_E1HR_CN_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_CN_STR-BEGDA sy-vline 
WA_E1HR_CN_STR-ENDDA sy-vline 
WA_E1HR_CN_STR-CTTYP sy-vline 
WA_E1HR_CN_STR-CTNUM sy-vline 
WA_E1HR_CN_STR-CTBEG sy-vline 
WA_E1HR_CN_STR-CTEDT sy-vline 
WA_E1HR_CN_STR-WRKPL sy-vline 
WA_E1HR_CN_STR-KONSL sy-vline 
WA_E1HR_CN_STR-KONTX sy-vline 
WA_E1HR_CN_STR-NBTGK sy-vline 
WA_E1HR_CN_STR-WTTKL sy-vline 
WA_E1HR_CN_STR-LFZFR sy-vline 
WA_E1HR_CN_STR-LFZZH sy-vline 
WA_E1HR_CN_STR-KGZFR sy-vline 
WA_E1HR_CN_STR-KGZZH sy-vline 
WA_E1HR_CN_STR-PRBZT sy-vline 
WA_E1HR_CN_STR-PRBEH sy-vline 
WA_E1HR_CN_STR-KDGFR sy-vline 
WA_E1HR_CN_STR-KDGTX sy-vline 
WA_E1HR_CN_STR-KDGF2 sy-vline 
WA_E1HR_CN_STR-KDGTX2 sy-vline 
WA_E1HR_CN_STR-ARBER sy-vline 
WA_E1HR_CN_STR-EINDT sy-vline 
WA_E1HR_CN_STR-KONDT sy-vline      INTO ld_text SEPARATED BY SPACE.

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